Molecular Catalysis Lab
2024
176. Eun Cheol Ra‡, Kwang Hyun Kim‡, Ju Hyeong Lee‡, Sejin Jang, Hyo Eun Kim, Jin Ho Lee, Eun Hyup Kim, Haneul Kim, Ja Hun Kwak*, and Jae Sung Lee* "Selective Light Hydrocarbon Production from CO2 Hydrogenation over Na/ZnFe2O4 and CHA-Zeolite Hybrid Catalysts"
ACS catalysis 14, 5, 3492–3503 (2024)
‡ These authors contributed equally to this work.
175. Sejin Jang, Dong Gun Oh, Haneul Kim, Kwang Hyun Kim, Konstantin Khivantsev*, Libor Kovarik* and Ja Hun Kwak* "Controlling the Phase Transformation of Alumina for Enhanced Stability and Catalytic Properties"
Angew. Chem. Int. Ed. 63, 15 e202400270 (2024)
174. Eun Jeong Jang‡, Eunseok Kim‡, Dong Gun Oh, Youngseon Kim, Jun Hong Jeon, Hyun Sik Han, Ji Man Kim, Jaekyoung Lee*, Ja Hun Kwak* "Promotional Effect of Mn on Pt/Al2O3 Catalysts in HC, CO, and NOx Oxidation for Controlling Diesel Emission"
Catalysis Today. 114300 (2024)
‡ These authors contributed equally to this work.
173. Yongseon Kim, Dong Gun Oh, Sung June Cho, Konstantin Khivantsev and Ja Hun Kwak* "Catalytic behavior of Pt single-atoms supported on CeO2"
Catalysis Today. 114298 (2024)
172. Libor Kovarik*, Mark Bowden, Konstantin Khivantsev, Ja Hun Kwak, Janos Szany "Structural complexity of γ-Al2O3: the nature of vacancy ordering and the structure of complex antiphase boundaries"
Acta Materialia. 119639 (2024)
2023
171. Eun Cheol Ra‡, Sejin Jang‡, Dong Gun Oh, Ju Hyeong Lee, Hyo Eun Kim, Eun Hyup Kim, Kwang Young Kim, Min Hee Lee, Kwang Hyun Kim, Ja Hun Kwak* and Jae Sung Lee* "A versatile hybrid catalyst platform of Na/ZnFe2O4 and zeolite for selective hydrocarbon production from CO2 hydrogenation"
Chemical Engineering Journal. 470, 144355 (2023)
‡ These authors contributed equally to this work.
170. Haneul Kim, Joonwoo Kim and Ja Hun Kwak* "Origin of Higher CO Oxidation Activity of Pt/rutile than That of Pt/anatase"
Journal of Physical Chemistry C. 127(15), 7142-7150(2023)
169. Dong Gun Oh‡, Hristiyan A. Aleksandrov‡,*, Haneul Kim, Iskra Z. Koleva, Konstantin Khivantsev*, Georgi N. Vayssilo and Ja Hun Kwak* "Understanding of Active Sites and Interconversion of Pd and PdO during CH4 Oxidation"
Molecules. 28(4), 1957 (2023)
‡ These authors contributed equally to this work.
168. Ricardo A. Peralta, Michael T. Huxley, Pengbo Lyu, Mariana L. Díaz-Ramírez, Sun Ho Park, Juan L. Obeso, Carolina Leyva, Cheol Yeong Heo, Sejin Jang, Ja Hun Kwak, Guillaume Maurin*, Ilich A. Ibarra*, and Nak Cheon Jeong* "Engineering Catalysis within a Saturated In(III)-Based MOF Possessing Dynamic Ligand–Metal Bonding"
ACS Applied Materials & Interfaces. 15, 1410−1417(2023)
2022
167. Hyunjoong Kim‡, Ji Mun Yoo‡, Dong Young Chung*, Yongseon Kim, Moonjung Jung, Megalamane S. Bootharaju, Jiheon Kim, Sagang Koo, Heejong Shin, Geumbi Na, Bongjin Simon Mun, Ja Hun Kwak, Yung-Eun Sung*, and Taeghwan Hyeon* "Design of a Metal/Oxide/Carbon Interface for Highly Active and Selective Electrocatalysis"
ACS Nano. 16(10), 16529–16538 (2022)
‡ These authors contributed equally to this work.
166. Konstantin Khivantsev*,‡, Ja Hun Kwak*,‡, Nicholas R. Jaegers*,‡, Iskra Z. Koleva‡ , Georgi N. Vayssilov , Miroslaw A. Derewinski, Yong Wang, Hristiyan A. Aleksandrov*,‡, Janos Szanyi*,‡ "Identification of the mechanism of NO reduction with ammonia(SCR) on zeolite catalysts"
Chemical Science. 13, 10383-10394 (2022)
‡ These authors contributed equally to this work.
165. Dong Gun Oh, Hristiyan A. Aleksandrov*, Haneul Kim, Iskra Z. Koleva, Konstantin Khivantsev*, Georgi N. Vayssilov, Ja Hun Kwak*, "The key role of a-top CO on terrace sites of metallic Pd clusters for CO oxidation"
Chemistry—A European Journal. 28(49), e202200684 (2022)
164. Sungjune Lee, Chul-Ung Kim, Jeong-Chul Kim, Su-Un Lee, Ja Hun Kwak, Ryong Ryoo, Tae-Wan Kim*, "Enhanced catalytic activity of phosphorus-modified SSZ-13 zeolite in the ethylene-to-propylene reaction by controlling acidity and intracrystalline diffusivity"
Chemical Engineering Journal. 446(3), 137169 (2022)
163. Konstantin Khivantsev *,‡, Nicholas R. Jaegers *,‡, Libor Kovarik*, Miroslaw A. Derewinski, Ja-Hun Kwak*, Janos Szanyi, "On the nature of extra-framework aluminum species and Improved catalytic properties in steamed zeolites"
Molecules. 27(7), 2352 (2022)
‡ These authors contributed equally to this work.
162. Myohwa Ko‡, Yongseon Kim‡, Jinwoo Woo‡, Rashmi Mehrotra, Pankaj Sharma, Jinjong Kim, Hu Young Jeong, Sang Hoon Joo*, Ji-Wook Jang*, Ja Hun Kwak*, "Direct propylene epoxidation with oxygen enabled by photo-electro-heterogeneous catalytic system"
Nature Catalysis. 5, 37-44 (2022)
‡ These authors contributed equally to this work.
2021
161. Yongseon Kim‡, Greg Collinge‡, Mal-Soon Lee, Konstantin Khivantsev, Sung June Cho*, Vassiliki-Alexandra Glezakou, Roger Rousseau*, Janos Szanyi* , Ja Hun Kwak*, "Are All Single Atoms Created Equal? Surface Density Dependent Catalytic Activity of Single Pd Atoms Supported on Ceria"
Angew. Chem. Int. Ed. 60, 42, 22769-22775 (2021)
‡ These authors contributed equally to this work.
160. Konstantin Khivantsev*·‡, Nicholas R. Jaegers‡, Ja Hun Kwak*·‡, Janos Szanyi*, Libor Kovarik*, "Precise identification and characterization of catalytically active sites on the surface of γ-alumina"
Angew. Chem. Int. Ed. 60, 32, 17522-17530 (2021)
‡ These authors contributed equally to this work.
159. Eun Jeong Jang, Jaekyoung Lee, Donggun Oh, Ja Hun Kwak*, "CH4 Oxidation Activity in Pd and Pt–Pd Bimetallic Catalysts: Correlation with Surface PdOx Quantified from the DRIFTS Study"
ACS Catalysis. 11, 10, 5894–5905 (2021)
158. Donggun Oh‡, Jaekyoung Lee‡, Eunseok Kim‡, Eun Jeong Jang, Ji Man Kim, Ja Hun Kwak*, "Pd/SiO2 as an active and durable CH4 oxidation catalyst for vehicle applications"
Journal of Industrial and Engineering Chemistry 99, 90-97 (2021)
‡ These authors contributed equally to this work.
157. Hojeong Lee, Chinh Nguyen-Huy, Eun Jeong Jang, Jihyeon Lee, Euiseob Yang, Man Sig Lee, Ja Hun Kwak, Kwangjin An*, "Interfacial effect of Pd supported on mesoporous oxide for catalytic furfuralhydrogenation"
Catalysis Today 365, 291-300 (2021)
156. Suochang Xu, Nicholas R. Jaegers, Wenda Hu, Ja Hun Kwak, Xinhe Bao, Junming Sun, Yong Wang*, and Jian Zhi Hu*, "High-Field One-Dimensional and Two-Dimensional 27Al Magic-Angle Spinning Nuclear Magnetic Resonance Study of θ-, δ-, and γ-Al2O3 Dominated Aluminum Oxides: Toward Understanding the Al Sites in γ-Al2O3"
ACS Omega 6, 5, 4090–4099 (2021)
155. Jihyeon Lee, Ji Hui Seo, Chinh Nguyen-Huy, Euiseob Yang, Jun Gyeong Lee, Hojeong Lee, Eun Jeong Jang, Ja Hun Kwak, Jun Hee Lee*, Hosik Lee*, Kwangjin An*, "Cu2O(100) surface as an active site for catalytic furfural hydrogenation"
Applied Catalysis B: Environmental 282 119576 (2021)
2020
154. Je Min Yu, Jungho Lee, Yoon Seo Kim, Jaejung Song, Jiyeon Oh, Sang Myeon Lee, Mingyu Jeong, Yongseon Kim, Ja Hun Kwak, Seungho Cho*, Changduk Yang*, Ji-Wook Jang*, "High-performance and stable photoelectrochemical water splitting cell with organic-photoactive-layer-based photoanode"
Nature Communications 11, 5059 (2020)
153. Yongseon Kim, Hosik Lee*, Ja Hun Kwak*, "Mechanism of CO-oxidation on Pd/CeO2(100): The unique surface-structure of CeO2(100) and the role of peroxide"
ChemCatChem 12, 5164-5172 (2020)
152. Eunkyung Cho, Yong-Hee Lee, Hyunjoung Kim, Eun Jeong Jang, Ja Hun Kwak*, Kyubock Lee*, Chang Hyun Ko*, Wang Lai Yoon, "Ni catalysts for dry methane reforming prepared by A-site exsolution on mesoporous defect spinel magnesium aluminate"
Applied catalysis A: General 602 117694 (2020)
151. Jaekyoung Lee, Eun Jeong Jang, Dong Gun Oh, János Szanyi, Ja Hun Kwak*, "Morphology and size of Pt on Al2O3: The role of specific metal-support interactions between Pt and Al2O3"
Journal of Catalysis 385 204-212 (2020)
150. Jae Hyung Kim, Dongyup Shin, Jaekyoung Lee, Du San Baek, Tae Joo Shin, Yong-Tae Kim, Hu Young Jeong, Ja Hun Kwak, Hyungjun Kim*, Sang Hoon Joo*, "A General Strategy to Atomically Dispersed Precious Metal Catalysts for Unravelling Their Catalytic Trends for Oxygen Reduction Reaction"
ACS Nano, 14, 2, 1990-2001 (2020)
149. Jaekyoung Lee‡, Mi Young Kim‡, Jun Hong Jeon, Dae Hyeong Lee, Komateedi N.Rao, Dong Gun Oh, Eun Jeong Jang, Eunseok Kim, Seung Chul Na, Hyun Sik Han*, Ja Hun Kwak*, "Effect of Pt pre-sintering on the durability of PtPd/Al2O3 catalysts for CH4 oxidation"
Applied Catalysis B: Environmental 260 118098 (2020)
‡ These authors contributed equally to this work.
148. Eun Jeong Jang, Jaekyoung Lee, Ja Hun Kwak*, "Morphology change and phase transformation of alumina related to defect sites and its use in catalyst preparation"
Catalysis Today 352 323-328 (2020)
2019
147. Chinh Nguyen-Huy, Jihyeon Lee, Ji Hui Seo, Euiseob Yang, Jaekyoung Lee, Keunsu Choi, Hosik Lee, Jae Hyung Kim, Man Sig Lee, Sang Hoon Joo, Ja Hun Kwak, Jun Hee Lee*, Kwangjin An*, "Structure-dependent catalytic properties of mesoporous cobalt oxides in furfural hydrogenation"
Applied Catalysis A: General 583 117125 (2019).
146. Eun Jeong Jang, Jaekyoung Lee, Hu Young Jeong and Ja Hun Kwak*, "Controlling the Acid-Base Properties of Alumina for Stable PtSt-based Propane Dehydrogenation Catalysts"
Applied Catalysis A: General 572 1-8 (2019).
145. Chinh Nguyen-Huy, Hojeong Lee, Jihyeon Lee, Ja Hun Kwak* and Kwangjin An*, "Mesoporous mixed CuCo oxides as robust catalysts for liquid-phase furfural hydrogenation"
Applied Catalysis A: General 571 118-126 (2019).
144. Jaekyoung Lee, Eun Jeong Jang and Ja Hun Kwak*, "Effect of number and properties of specific sites on alumina surfaces for PtAl2O3 catalysts"
Applied Catalysis A: General 569 8-19 (2019).
2018
143. Euiseob Yang, Jun Gyeong Lee, Dong Hyeon Kim, Yoon Seok Jung, Ja Hun Kwak, Eun Duck Park* and Kwangjin An*, "SiO2@V2O5@Al2O3 core-shell catalysts with high activity and stability for methane oxidation to formaldehyde"
Journal of Catalysis 365 134-144 (2018).
142. Euiseob Yang‡, Eun Jeong Jang‡, Jun kyoung Lee, Sinmyung Yoon, Jaekyoung Lee, Nathan Mussewhite, Gabor A. Somorjai, Ja Hun Kwak* and Kwangjin An*, "Acidic effect of porous alumina as supports for Pt nanoparticle catalysts in n-hexane reforming"
Catalysis Science & Technology 8 3295 (2018).
‡ These authors contributed equally to this work.
141. Jaekyoung Lee, Eun Jeong Jang, Hu Young Jeong, Ja Hun Kwak*, "Critical role of (100) facets on for ethanol dehydration: Combined efforts of morphology-controlled synthesis and TEM study"
Applied Catalysis A: General 556 121-128 (2018).
140. Dongsik Nam, Jihyun Huh, Jiyoung Lee, Ja Hun Kwak, Hu Young Jeong, Kyungmin Choi and Wonyoung Choe*, "Cross-linking Zr-based metal-organic polyhedra via postsynthetic polymerization"
Chemical Science 8 7765-7771.(2018)
139. Bhupendra Kumar Singh, Yongseon Kim, Seung Bin Baek, Abhshek Meena, Sirah Sultan, Ja Hun Kwak* and Kwang S. Kim*, "Template free facile synthesis of mesoporous mordenite for bulky molecular catalytic reactions"
Journal of Industrial and Engineering Chemistry 57 363-369.(2018)
2017
138. Kyoung Joo Lee, Yongseon Kim, Jae Hwa Lee, Sung June Cho*, Ja Hun Kwak* and Hoi Ri Moon*, "Facile Synthesis and Characterization of Nanostructured Transition Metal/Ceria Solid Solutions (TMxCe1-xO2-d, TM=Mn, Ni, Co, or Fe) for CO oxidation"
Chemistry of Materials 29 2874-2882.(2017)
137. Jaekyoung Lee, Janos Szanyi, Ja Hun Kwak*, "Ethanol dehydration on γ-Al2O3 : Effects of partial pressure and temperature"
Molecular catalysis 434 39-48.(2017)
136. Jiyoung Lee, Ja Hun Kwak*, Wonyoung Choe*, "Evolution of form in metal-organic frameworks"
Nature communications 8 14070.(2017)
135. Ahmad M. Harzandi, Jitendra N. Tiwari, Ho Sik Lee, Himchan Jeon, Woo Jong Cho, Geunsik Lee, Jaeyoon Baik, Ja Hun Kwak*, and Kwang S. Kim*, "Efficient CO Oxidation by 50-Facet Cu2O Nanocrystals Coated with CuO Nanoparticles"
ACS Applied Materials & Interfaces. 9 2495-2499 (2017)
134. Hyun Ji Yang, Bijoy P. Mathew, Dong Gun Oh, Kyungjae Myung, Ja Hun Kwak*, Sung you Hong*,
"Efficient copper catalysts for C-H bond arylation under microwave heating: Dirent access to multi-substituted pivanilides"
Catalysis Communications. 90 83-86 (2017)
133. Jaekyong Lee, Eun Jeong Jang, Ja Hun Kwak* "Acid-base properties of Al2O3: Effects of morphology, crystalline phase, and additives"
Journal of Catalysis 345 135-148(2017)
2016
132. János Szanyi*, Feng Gao, Ja Hun Kwak, Márton Kollár, Yilin Wang and Charles H. F. Peden, "Characterization of Fe2+ ions in Fe, H/SSZ-13 zeolites: FTIR spectroscopy of CO and NO probe molecules"
Phys.Chem.Chem.Phys. 18 10473 - 10485 (2016)
131. Bijoy P. Mathew, Hyun ji Yang, Himchan Jeon, Jeong Hyeon Lee, Jin Chul Kim, Tae Joo Shin, Kyungjae Myung, Sang Kyu Kwak*, Ja hun Kwak*, Sung You Hong*, "C-H bond arylation of anilides inside copper-exchanged zeolites"
Journal of Molecular Catalysis A: Chemmical 417 64-70 (2016)
130. Pipas Saha, Himchan Jeon, Pratyush Kumar mishra, Hyun-Woo Rhee*, Ja Hun Kwak*, "N-H and S-H insertions over Cu(I)-zeolites as heterogeneous catalysts"
Journal of Molecular catalysis A: Chemical 417 10-18 (2016)
129. Jian Zhi Hu*, Suochang Xu, Ja-Hun Kwak, Mary Y. Hu, Chuan Wan, Zhenchao Zhao, János Szanyi, Xinhe Bao, Xiuwen Han, Yong Wang, and Charles H.F. Peden, "High Field 27Al MAS NMR and TPD studies of active sites in ethanol dehydration using thermally treated transitional aluminas as catalysts"
Journal of Catalyst 336 85-93 (2016)
128. Ja Hun Kwak*, Jaekyoung Lee, Janos Szanyi, Charles H.F. Peden, "Modification of the acid/base properties of γ-Al2O3 by oxide additives: An ethanol TPD investigation"
Catalysis Today 265 240-244 (2016)
2015
127. Xiang Wang, Hui Shi, Ja Hun Kwak, Janos Szanyi*, "Mechanism of CO2 Hydrogenation on Pd/Al2O3 Catalysts: Kinetics and Transient DRIFTS-MS Studies"
ACS Catal. 5, 6337−6349 (2015)
126. Libor Kovarik*, Mark Bowden, Dachuan Shi, Nancy M. Washton, Amity Andersen, Jian Zhi Hu, Jaekyoung Lee, János Szanyi, Ja-Hun Kwak, and Charles H. F. Peden, "Unraveling the Origin of Structural Disorder in High Temperature Transition Al2O3: Structure of θ-Al2O3"
Chem.Mater., 27(20), 7042-7049, (2015)
125. Janos Szanyi*, Ja Hun Kwak, ,"Photo-catalytic oxidation of acetone on a TiO2 powder:An in situ FTIR investigation"
Journal of Molecular Catalysis A, 406, 213 (2015)
124. Jaekyoung Lee; Himchan Jeon; Dong Gun Oh; Janos Szanyi, Ja Hun Kwak*, ,"Morphology-dependent phase transformation of gamma-Al2O3"
Applied Catalysis A, 500, 58 (2015)
2014
123. Janos Szanyi*, Ja-Hun Kwak,"15N2 formation and fast oxygen isotope exchange during pulsed 15N18O exposure of MnOx/CeO2"
Chem. Commun., 50, 14498 (2014)
122. Eric J. Peterson,, Andrew T. DeLaRiva, Sen Lin, Ryan S. Johnson,, Hua Guo, Jeffrey T. Miller, Ja Hun Kwak, Charles H.F. Peden, Boris Kiefer, Lawrence F. Allard, Fabio H. Ribeiro, Abhaya K. Datye*. "Low Temperature CO Oxidation Catalyzed by Regenerable Atomically Dispersed Palladium on Alumina." Nature Communications 5, 4885 (2014)
121. Libor Kovarik*, Mark Bowden, Arda Genc, Janos Szanyi, Charles H. F. Peden, Ja-Hun Kwak*, "The Structure of Delta Alumina: Toward the Atomic Level Understanding of Transition Alumina Phases" J. Phys. Chem. C 118 18051(2014)
120. János Szanyi*, Ja Hun Kwak, "Dissecting the steps of CO2 reduction : 2. The interaction of CO and CO2 with Pd/γ-Al2O3 : an in situ FTIR" Phys.Chem. Chem. Phys., 16,15126 (2014)
119. János Szanyi*, Ja Hun Kwak, "Dissecting the steps of CO2 reduction : 1. The interaction of CO and CO2 with γ-Al2O3 : an in situ FTIR" Phys.Chem. Chem. Phys., 16,15117 (2014)
118. Ja Hun Kwak, Tamás Varga, Charles H.F. Peden, Feng Gao, Jonathan C. Hanson, János Szanyi*,"Following the movement of Cu ions in a SSZ-13 zeolite duringdehydration, reduction and adsorption: A combined in situ TP-XRD,XANES/DRIFTS study" Journal of Catalysis 314,83 (2014)
117. Ja Hun Kwak*, Robert Dagle, Gerald C. Tustin, Joseph R. Zoeller*, Lawrence F. Allard, Yong Wang*, "Molecular Active Sites in Heterogeneous Ir-La/C-Catalyzed Carbonylation of Methanol to Acetates" J. Phys. Chem. Lett. 5, 566 (2014)
2013
116. Ja Hun Kwak*, Libor Kovarik, János Szanyi*, “CO2 reduction on supported Ru/Al2O3 catalysts: cluster size dependence of product selectivity” ACS Catalysis 3, 2449 (2013).
115. Janos Szanyi*, Cheol Woo Yi, Kumudu K Mudiyanselage, Ja Hun Kwak, “Understanding automotive exhaust catalysts using a surface science approach: Model NOx storage materials” Topics in Catalysis 56, 1420 (2013).
114. Feng Gao, Ja Hun Kwak, Janos Szanyi, Charles H.F. Peden*, “Current understanding of Cu-exchanged chabazite molecular sieves for use as commercial diesel engine DeNOx catalysts” Topics in Catalysis 56, 1441 (2013).
113. Ja Hun Kwak*, Jong H. Lee, Sarah D. Burton, Andrew S. Lipton, Charles H.F. Peden, János Szanyi*,”A common intermediate in N2 formation in enzymes and zeolites: Side-on Cu-nitrosyl complex”
Angew. Chem. Int. Ed. 52 9985 (2013) (selected as a VIP in Angew. Chem. Int. Ed., “Editor’s choice” in Science, research highlight in Green Car Congrass ).
112. Ja Hun Kwak*, Libor Kovarik, János Szanyi*, “Heterogeneous catalysis on atomically dispersed supported metals: CO2 reduction on multifunctional Pd catalysts.”
ACS Catalysis 3, 2094 (2013).
111. Do Heui Kim*, Kumudu K Mudiyanselage, János Szanyi, Ja Hun Kwak, Haiyang Zhu, and Charles H.F. Peden, “Effect of K loadings on nitrate formation/decomposition and on NOx storage performance of K-based NOx storage-reduction catalysts”
Applied Catalysis B: Environmental 142-143, 472 (2013).
110. Feng Gao*, Eric D. Walter, Eric M. Karp, Jinyong Luo, Russell G. Tonkyn, Ja Hun Kwak, János Szanyi, Charles H.F. Peden* “Structure-activity relationships in NH3-SCR over Cu-SSZ-13 as probed by reaction kinetics and EPR studies”
Journal of Catalysis 300 20 (2013).
109. Janos Szanyi*, Ja Hun Kwak, Haiyang Zhu, and Charles H.F. Peden, “Characterization of Cu-SSZ-13 NH3-SCR Catalysts: an in situ FTIR Study”
PCCP 15 2368 (2013).
108. Xianqin Wang, Jonathan Hanson*, Ja Hun Kwak, Janos Szanyi, and Charles H.F.Peden, “Cation Movements during Dehydration and NO2 Desorption in a Ba-Y,FAU Zeolite: An In Situ Time-Resolved X-ray Diffraction Study"
J. Phys. Chem. C 117 3915 (2013).
107. Libor Kovarik*, Arda. Genc, Chongmin Wang, Charles H.F. Peden, Janos Szanyi, and Ja Hun Kwak*, “Tomography and high-resolution electron microscopy study of surfaces and porosity in a plate-like γ-Al2O3”
J. Phys. Chem. C 117 179 (2013).
106. Haiyang Zhu, Ja Hun Kwak, Charles H.F. Peden, and János Szanyi*, “In situ DRIFTS-MS studies on the oxidation of adsorbed NH3 by NOx over a Cu-SSZ-13 zeolite”
Catal. Today 205 16 (2013).
2012
105.Ja Hun Kwak*, Russell Tonkyn, Donghai Mei, Sung June Cho, Libor Kovarik, Jong H. Lee, Charles H.F. Peden, and János Szanyi, “Size-dependent catalytic performance of CuO on γ-Al2O3: NO reduction versus NH3 oxidation” ACS Catalysis 2 1432 (2012).
104. Xiaoyan She, Ja Hun Kwak, Junming Sun, Jianzhi Hu, Mary Hu, Chongmin Wang, Charles H.F Peden, Yong Wang, “Highly Dispersed and Active ReOx on Alumina-Modified SBA-15 Silica for 2-butanol Dehydration” ACS Catalysis 2 1020 (2012).
103. Do Heui Kim, Kumudu K Mudiyanselage, János Szanyi, Haiyang Zhu, Ja Hun Kwak, and Charles H.F. Peden “Characteristics of Pt-K/MgAl2O4 lean NOx trap catalysts “ Catalysis Today 184 2 (2012).
102. Charles H.F. Peden, Ja Hun Kwak, Do Heui Kim, Jong-Hwan Lee, Giovanni Cavataio, Yisun Cheng, and Christine K. Lambert, “Hydrothermal Aging of Cu/Beta Zeolite Catalysts – Possible Origin of Improved High Temperature Performance” Catalysis Today 184 245 (2012).
101. Ja Hun Kwak*, Haiyang Zhu, John H. Lee, Charles H.F. Peden, János Szanyi, “Two different cation positions in Cu-SSZ-13?” Chemical Communications 48 4758 (2012).
100. Ja Hun Kwak, Do Heui Kim, Janos Szanyi, Sung June Cho, and Charles H.F Peden. "Enhanced high temperature performance of MgAl2O4-supported Pt-BaO lean NOx trap catalysts." Topics in Catalysis 55 70 (2012).
99. Ja Hun Kwak*, Diana Tran, János Szanyi, Charles H.F. Peden, Jong H. Lee”The Effect of Copper Loading on the Selective Catalytic Reduction of Nitric Oxide by Ammonia over Cu-SSZ-13” Catalysis Letters 142 295(2012).
98. Ja Hun Kwak*, Diana Tran, Sarah D. Burton, János Szanyi, Jong H. Lee and Charles H.F. Peden “Effects of Hydrothermal Aging on NH3-SCR reaction over Cu/zeolites” Journal of Catalysis 287 203 (2012).
97. Jian Zhi Hu, Jesse A. Sears, Hardeep S. Mehta, Joseph J. Ford, Ja Hun Kwak, Kake Zhu, Yong Wang, Jun Liu, Charles H. F. Peden, and David W. Hoyt, “A Large Sample Volume Magic Angle Spinning Nuclear Magnetic Resonance Probe for In Situ Investigations with Constant Flow of Reactants” PCCP 14, 2137 (2012).; selected as a front cover.
96. Do Heui Kim, Ja Hun Kwak, Janos Szanyi, Charles H.F. Peden, “Isothermal desulfation of pre-sulfated Pt-BaO/γ-Al2O3 lean NOx trap catalysts with H2: the effect of H2 concentration and the roles of CO2 and H2O” Applied Catalysis B: Environmental 111-112, 342 (2012).
2011
95. Jian Zhi Hu, Ja Hun Kwak, Yong Wang, Mary Y. Hu, Romulus V. Turcu, Charles H.F. Peden, “Characterizing Surface Acidic Sites in Mesoporous Silica Supported Tungsten Oxide Catalysts Using Solid State 15N NMR and Quantum Chemistry Calculations” J. Phys. Chem. C 115, 23354 (2011).
94. Byoung Chan Kim, Jinwoo Lee, Wooyong Um, Jaeyun Kim, Jin Joo, Jin Hyung Lee, Ja Hun Kwak, Jae Hyun Kim, Changha Lee, Hongshin Lee, R. Shane Addleman, Taeghwan Hyeon, Man Bock Gu, Jungbae Kim,” Magnetic mesoporous materials for removal of environmental wastes” Journal of Hazardous Materials 192 1140 (2011).
93. Ja Hun Kwak, Roger Rousseau, Donghai Mei, Charles H.F. Peden, and János Szanyi, “The Origin of Regioselectivity in 2-butanol Dehydration on Solid Acid Catalysts” Chem. Cat. Chem. 3 1557 (2011).
92. XianQin Wang, Do Heui Kim, Ja Hun Kwak, Chongmin Wang, Janos Szanyi, Charles H.F. Peden, “Effect of reductive treatments on Pt behavior and NOx storage in lean NOx trap catalysts” Catalysis Today 175 78 (2011)
91. Ja Hun Kwak, Jian Zhi Hu, Romulus V. Turcu, Kevin M. Rosso, Eugene S. Ilton, Chongming Wang, Jesse. A. Sears, Mark H. Engelhard, Andrew R. Felmy, and David W. Hoyt, “The Role of H2O in the Carbonation of Forsterite in Supercritical CO2” International Journal of Greenhouse Gas Control 5, 1081 (2011).
90. Ja Hun Kwak*, Charles H.F. Peden, and János Szanyi, “Using a surface sensitive chemical probe and a bulk structure technique to monitor the γ to θ Al2O3 phase transformation” J. Phys. Chem. C 115, 12575 (2011).
89. Ja Hun Kwak*, Donghai Mei, Janos Szanyi, Chuck H.F. Peden and Roger Rousseau, “(100) facets of γ-Al2O3: the active surfaces for alcohol dehydration reactions” Catalysis Letters 141 649 (2011).
2010
88. Yong Yang, Charles Mims, Robert Disselkamp, Ja Hun Kwak, Charles Peden, Charles Campbell, “(Non)formation of Methanol by Direct Hydrogenation of Formate on Copper Catalysts” J. Phys. Chem. C 114, 17205(2010).
87. Ja Hun Kwak, Russell Tonkyn, Do Heui Kim, Janos Szanyi and Charles H.F. Peden, “Excellent activity and selectivity for selective catalytic reduction of NO with NH3 on Cu-SSZ-13 catalyst” Journal of Catalysis 275 187(2010).
86. Donghai Mei, Ja Hun Kwak*, Jianzhi Hu, Sung June Cho, János Szanyi, Lawrence F. Allard and Charles H.F. Peden, “Unique Role of Anchoring Penta-coordinated Al3+ Sites in the Sintering of γ-Al2O3-supported Pt Catalysts” J. Phys. Chem. Lett. 1 2688 (2010).
85. Donghai Mei, Ja Hun Kwak, Janos Szanyi, Charles H. F. Peden, “Catalyst Size and Morphology Effects on the Interaction of NO2 with BaO/γ-Al2O3 Materials” Catalyis Today 151 304 (2010).
84. Yisun Cheng, Christine Lambert, Do Heui Kim, Ja Hun Kwak, Sung June Cho and Charles H.F. Peden, “The Different Impacts of SO2 and SO3 on Cu/Zeolite SCR Catalysts” Catalyis Today 151 266 (2010).
83. Leon L. Shaw, Xuefei Wan, Jian Zhi Hu, Ja Hun Kwak, Zhenguo Yang, “The Solid-State Hydriding Mechanism in the LiBH4 + MgH2 System” J. Phys. Chem. C 114 8089 (2010).
82. Ja Hun Kwak, Jianzhi Hu, David Hoyt, Jesse Sears, Kevin Rosso, Andrew Felmy, “Metal Carbonation of Forsterite in Supercritical CO2 and H2O Using Solid State 29Si, 13C NMR Spectroscopy” J. Phys. Chem. C 114 4126 (2010).
81. Jian Zhi Hu, Ja Hun Kwak, Zhenguo Yang, Xuefei Wan, Leon L. Shaw, ” Detailed investigation of ion exchange in ball-milled LiH +MgB2 system using ultra-high field nuclear magnetic resonance spectroscopy” Journal of Power Sources 195 3645 (2010).
2009
80. Do Heui Kim, Ja Hun Kwak, Janos Szanyi, Xianqin Wang, Guosheng Li, Jonathan Hanson, Charles H.F. Peden, “Characteristics of Desulfation Behavior for Pre-Sulfated Pt-BaO/CeO2 Lean NOx Trap Catalysts: The Role of the CeO2 Support” J. Phys. Chem. C 113 21123 (2009).
79. Do Heui Kim, Ja Hun Kwak, Janos Szanyi, Xianqin Wang, Mark H. Engelhard, Charles H.F. Peden, “Promotional Effect of CO2 on Desulfation Processes for Pre-Sulfated Pt-BaO/Al2O3 Lean NOx Trap Catalysts” Topics in Catalysis 52 1719 (2009).
78. Jinwoo Lee, Hyon Bin Na, Byoung Chan Kim, Jin Hyung Lee, Byoungsoo Lee, Ja Hun Kwak, Yosun Hwang, Je-Geun Park, Man Bock Gu, Jaeyun Kim, Jin Joo, Chae-Ho Shin, Jay W. Grate, Taeghwan Hyeon and Jungbae Kim,” Magnetically-Separable and Highly-Stable Enzyme System Based on Crosslinked Enzyme Aggregates Shipped in Magnetite-Coated Hierarchically-Ordered Mesocelluar Mesoporous Silica” J. Mater. Chem. 19 7864 (2009).
77. Ja Hun Kwak*, Jianzhi Hu, Donghai Mei, Cheol-Woo Yi, Doheui Kim, Charles H.F. Peden, Lawrence F. Allard and Janos Szanyi, “Coordinatively unsaturated Al3+ centers as binding sites for active catalyst phases of platinum on γ-Al2O3” Science 325 1670 (2009).; also highlighted in C&E News, Nature Chemistry 1 683(2009) etc.
76. Kake Zhu, Jianzhi Hu, Xiaoyan She, Jun Liu, Zimin Nie, Yong Wang, Charles H. F. Peden, and Ja Hun Kwak, “Characterization of Dispersed Heteropoly Acid on Mesoporous Zeolite Using Solid-State 31P NMR Spin-Lattice Relaxation” Journal of the American Chemical Society 131 9715 (2009).
75. William Osborn, Tippawan Markmaitree, Leon L. Shaw, Jian-Zhi Hu, Ja Hun Kwak, Zhenguo Yang, “Low Temperature Milling of the LiNH2 + LiH Hydrogen Storage System” Int. J. Hydrogen Energy 34 4331 (2009).
74. Rong Kou, Yuyan Shao, Donghai Wang, Mark H. Engelhard, Ja Hun Kwak, June Wang, Vilayanur V. Viswanathan, Chongmin Wang, Yuehe Lin, Yong Wang, Ilhan A. Aksay, and Jun Liu, “Enhanced Activity and Stability of Pt catalysts on Functionalized Graphene Sheets for Electrocatalytic Oxygen Reduction” Electrochemistry Communications 11 954 (2009).
73. Do Heui Kim, Janos Szanyi, Ja Hun Kwak, Xianqin Wang, Jonathan C Hanson, Mark H Engelhard, Charles HF Peden, “Effects of sulfation level on the desulfation behavior of pre-sulfated Pt/BaO/Al2O3 lean NOx trap catalysts: a combined H2 TPRX, in-situ sulfur K-edge XANES, XPS and TR-XRD study” J. Phys. Chem. C 113 7336 (2009).
72. Donghai Mei, Qingfeng Ge, Ja Hun Kwak, Do Heui Kim, Christelle M. Verrier, Janos Szanyi, Charles H.F. Peden,”Characterization of Surface and Bulk Nitrates of γ-Al2O3 Supported Alkaline Earth Oxides using Density Functional Theory” PCCP 11 3380 (2009).
71. Jian Zhi Hu, Ja Hun Kwak, Zhenguo Yang, Xuefei Wan, Leon L. Shaw,” Direct Observation of Ion Exchange in Mechanically Activated LiH+MgB2 System Using Ultra-High Field 6Li, 11B and 25Mg Magic Angle Spinning NMR Spectroscopy” Appl. Phys. Lett. 94 141905 (2009).
70. Jian Zhi Hu, Jesse A. Sears, Ja Hun Kwak, David W. Hoyt, Yong Wang and Charles H. F. Peden, “An Isotropic Chemical Shift-Chemical Shift Anisotropic Correlation Experiment Using Discrete Magic Angle Turning” J. of Magnetic Resonance 198 105 (2009).
69. William Osborn, Tippawan Markmaitree, Leon L. Shaw, Ruiming Ren, Jianzhi Hu, Ja Hun Kwak, Zhenguo Yang, “Solid-State Hydrogen Storage: Considerations of Storage Capacity, Thermodynamics and Kinetics” JOM: Journal of the Minerals, Metals and Materials Society 61 45(2009).
68. Jian Zhi Hu, Ja Hun Kwak, Yong Wang, and Charles H.F. Peden, Heng Zheng, Ding Ma, and Xinhe Bao,” Investigations of the Active Centers for Methane Dehydroaromatization Using Ultra-High Field Solid State 95Mo NMR Spectroscopy” J. Phys. Chem. C 113 2936(2009).
67. Ja Hun Kwak, Donghai Mei, Cheol-Woo Yi, Do Heui Kim, Charles H.F. Peden, Lawrence F. Allard, and János Szanyi, ”Understanding the Nature of Surface Nitrates in BaO/γ-Al2O3 NOx Storage Materials: a combined experimental and theory study” Journal of Catalysis 261 17(2009).
2008
66. Donghai Mei, Qingfeng Ge, Ja Hun Kwak, Do Heui Kim, Janos Szanyi and Charles H.F. Peden, “Adsorption and Formation of BaO Overlayer on the gamma-Al2O3 Surfaces” J. Phys. Chem. C 112 18050(2008).
65. Ja Hun Kwak, Do Heui Kim, János Szanyi, and Charles H.F. Peden, “Excellent sulfur resistance of Pt/BaO/CeO2 lean NOx trap catalysts” Applied Catalysis. B, Environmental 84 545 (2008).
64. Yong Yang, Charles Mims, Robert S Disselkamp, Donghai Mei, Ja Hun Kwak, Janos Szanyi, Charles HF Peden and C T Campbell , “Isotope effects in methanol synthesis and the reactivity of copper formates on a Cu/SiO2 catalyst” Catal. Lett. 125 201 (2008).
63. Jose E. Herrera, Ja Hun Kwak, Jian Zhi Hu, Yong Wang, Charles H.F. Peden, “Effects of novel supports on the physical and catalytic properties of tungstophosphoric acid for alcohol dehydration reactions” Topics in Catalysis 49 259 (2008).
62. Yuyan Shao, Rong Kou, Jun Wang, Vilayanur V. Viswanathan, Ja Hun Kwak, Jun Liu, Yong Wang and Yuehe Lin,” The influence of the electrochemical stressing (potential step and potential-static holding) on the degradation of PEM fuel cell electrocatalysts” Journal of Power Sources 185 280 (2008).
61. Do Heui Kim, Ya-Huei Chin, Ja Hun Kwak, Charles H.F. Peden, "Promotional effects of H2O treatment on NOx storage over fresh and thermally aged Pt-BaO/Al2O3 lean NOx trap catalysts" Catal. Lett. 124 39(2008).
60. Ja Hun Kwak, Jianzhi Hu, Adrienne Lukaskia, Do Heui Kim, János Szanyi, and Charles H.F. Peden, “The role of penta-coordinated Al3+ ions in the high temperature phase transformation of γ-Al2O3” J. Phys. Chem. C 112 9486 (2008).
59. Jianzhi Hu, Ja Hun Kwak, Zhenguo Yang, William Osborn, Tippawan Markmaitree, Leon L. Shaw ” Investigation of Mechanical Activation on Li-N-H Systems Using 6Li MAS NMR at Ultra-High Field” Journal of Power Sources 182 278(2008).
58. Jianzhi Hu, Ja Hun Kwak, Zhenguo Yang, William Osborn, Tippawan Markmaitree, Leon L. Shaw, “Probing the Reaction Pathway of Dehydrogenation of the LiNH2 + LiH Mixture Using In Situ 1H NMR Spectroscopy” Journal of Power Sources 181 116(2008).
57. Do Heui Kim, Ja Hun Kwak, Xianqin Wang, Janos Szanyi, and Charles H.F. Peden, “Sequential high temperature reduction, low temperature hydrolysis for the regeneration of sulfated NOx trap catalysts” Catalysis Today 136 183(2008).
56. Christelle Verrier, Ja Hun Kwak, Do Heui Kim, Charles H. F. Peden and Janos Szanyi, “NOx uptake on Alkaline earth oxide (BaO, MgO, CaO and SrO) supported on γ-Al2O3” Catalysis Today 136 121(2008).
55. Yisun Cheng, John Hoard, Christine Lambert, Ja Hun Kwak, and Charles H.F. Peden, “NMR Studies of Cu/Zeolite SCR Catalysts Hydrothermally Aged with Urea” Catalysis Today 136 34(2008).
54. Jinwoo Lee, Jongkyu Youn, Hyon Bin Na, Taekyung Yu, Hwan O Kim, Ja Hun Kwak, Hyun-Gyu Park, Ho Nam Chang, Misun Kang, Je-Geun Park, Jungbae Kim and Taeghwan Hyeon. "Simple synthesis of functionalized superparamagnetic magnetite/silica core/shell nanoparticles and their applications to magnetically-separable high-performance biocatalyst." Small 4 143-152 (2008).
53. Heng Zheng, Ding Ma, Xinhe Bao, Jian Zhi Hu, Ja Hun Kwak, Yong Wang, and Charles H.F. Peden, “Direct Observation of the Active Center for Methane Dehydroaromatization Using an Ultra-High Field 95Mo NMR Spectroscopy” Journal of the American Chemical Society 130 3722(2008)
: also highlighted in C&E News, Science Daily, Environmental Research Web, Engineer Live etc
52. Do Heui Kim, Ja Hun Kwak, Janos Szanyi, Sung Jun Cho, and Charles H.F. Peden, “The Roles of Pt and BaO in the Sulfation of Pt/BaO/Al2O3 a Lean NOx Trap Materials: Sulfur K-Edge XANES and Pt LIII XAFS Studies” J. Phys. Chem. C 112 2981(2008).
2007
51. Haibo Zhao, Johnathan E. Holladay, Ja Hun Kwak, Conrad Z. Zhang, “A new route to improved glucose yields in cellulose hydrolysis” Journal of Biobased Materials and Bioenergy 1 210 (2007).
50. Ricardo J Chimentão, Jose E Herrera, Ja Hun Kwak, Fransesc Medina, Yong Wang, and Charles Peden, “Oxidation of Ethanol to Acetaldehyde over Na-promoted vanadium oxide catalysts” Applied Catalysis A: General 332 263 (2007).
49. Cheol-Woo Yi, Ja Hun Kwak, and János Szanyi, “The interaction of NO2 with BaO: from cooperative adsorption to Ba(NO3)2 formation” J. Phys. Chem. C 111 15299 (2007).
48. Cheol-Woo Yi, Ja Hun Kwak, Charles H. F. Peden, Chongmin Wang, and János Szanyi, “Understanding Practical Catalysts Using a Surface Science Approach: The Importance of Strong Interaction between BaO and Al2O3 in NOx Storage Materials.” J. Phys. Chem. C 111 14942(2007).
47. Ja Hun Kwak, Jian Zhi Hu, Do Heui Kim, Janos Szanyi, Charles H.F. Peden “Penta-coordinated Al3+ ions as preferential nucleation sites for BaO on γ‑Al2O3: an Ultra-high Magnetic Field 27Al MAS NMR study” Journal of Catalysis 251 189(2007): also highlighted in C&E News, Science Daily, PhysOrg, RxPG News, Bright Surf(UK), Checkbiotech(Switzland), Innovation Reports(Germany), and AICHE etc.
46. Chun Lu, Jianzhi Hu, Ja Hun Kwak, Zhenguo Yang, Ruming Ren, Tippawan Markmaitree and Leon L Shaw, “Study the Effects of Mechanical Activation on Li-N-H Systems With 1H and 6Li Solid-State NMR” Journal of Power Sources 170 419(2007).
45. Haibo Zhao, Johnathan E. Holladay, Ja Hun Kwak, Conrad Z. Zhang,”Inverse temperature-dependent pathway for cellulose decrystallization in trifluoroacetic acid” J. Phys. Chem. B 111 5295 (2007).
44. Haibo Zhao, Ja Hun Kwak, Conrad Z. Zhang, Heather M. Brown, Bruce W. Arey and Johnathan E. Holladay, “Studying cellulose fiber structure by SEM, XRD, NMR and acid hydrolysis”, Carbohydrate Polymers 68 235 (2007).
43. János Szanyi, Ja Hun Kwak, Do Heui Kim, Xianqin Wang, Ricardo J. Chimentao, Jonathan Hanson, William S. Epling, and Charles H.F. Peden, ” Water-induced morphology changes in BaO/γ-Al2O3 NOx storage materials: an FTIR, TPD, and time-resolved synchrotron XRD study” J. Phys. Chem. C 111 4678 (2007).
42. János Szanyi, Ja Hun Kwak, Do Heui Kim, Xianqin Wang, Jonathan Hanson, Ricardo J. Chimentao, and Charles H.F. Peden, ” Water-induced morphology changes in BaO/γ-Al2O3 NOx storage materials” Chem. Comm. 984(2007).
41. Do Heui Kim, Ja Hun Kwak, János Szanyi, Sarah D. Burton and Charles H.F. Peden,”Water-induced Transformation of NO2 Pre-adsorbed Barium Phases into Ba(NO3)2 Phase over the Thermally Aged BaO/Al2O3” Applied Catal. B: Environmental 72, 234 (2007).
40. János Szanyi, Ja Hun Kwak, Ricardo J. Chimentao, and Charles H.F. Peden, “Effect of H2O on the adsorption of NO2 on γ-Al2O3: an in situ FTIR/MS study” J. Phys. Chem. C 111, 2661(2007).
39. Moon Il Kim, Jungbae Kim, Jinwoo Lee, Hongfei Jia, Hyon Bin Na, Jong Kyu Youn, Ja Hun Kwak, Alice Dohnalkova, Jay W. Grate, Ping Wang, Taeghwan Hyeon, Hyun Gyu Park, Ho Nam Change, “ Crosslinked Enzyme Aggregates in Hierarchically-Ordered Mesoporous Silica: for Enzyme Stabilization” Biotechnology and Bioengineering 96 210(2007).
38. Haibo Zhao, Ja Hun Kwak, Yong Wang, James A. Franz, J. M. White, Johnathan E. Holladay “Interactions between cellulose and N-Methylmorpholine-N-oxide” Carbohydrate Polymers 67(1), 97 (2007).
2006
37. Jose E. Herrera, Ja Hun Kwak, Jian Zhi Hu, Yong Wang and Charles H.F. Peden, ”Synthesis of nanodispersed oxides of vanadium, titanium, molybdenum, and tungsten on mesoporous silica using atomic layer deposition” Topics in Catalysis, 39 245(2006).
36. Ja Hun Kwak, Do Heui Kim, Janos Szanyi, Tamas Szailer, and Charles H.F. Peden,”NOx uptake mechanism on Pt/BaO/Al2O3 catalysts”, Catal. Lett. 111, 119(2006).
35. Do Heui Kim, Janos Szanyi, Ja Hun Kwak, Tamas Szailer, Jonathan Hanson, Chong Min Wang and Charles H.F. Peden, ”Effect of barium loading on the de-sulfation process over sulfated Pt/BaO/Al2O3 studied by H2 TPRX, TEM, Sulfur K-edge XANES and in situ TR-XRD”, J. Phys. Chem. B 110 10441(2006).
34. Chongmin Wang, Ja Hun Kwak, Do Heui Kim, János Szanyi, R. Sharma, S. Thevuthasan, and Charles H.F. Peden,” Morphological Evolution of Ba(NO3)2 Supported on α-Al2O3(0001): An In Situ TEM Study” J. Phys. Chem. B 110, 11878(2006).
33. Jungbae Kim, Hongfei Jia, Changwon Lee, Seung-wook Chung, Ja Hun Kwak, Yongsoon Shin, Alice Dohnalkova, Byung-Gee Kim, Ping Wang, Jay W. Grate, “Single Enzyme Nanoparticles in Nanoporous Silica: A Hierarchical Approach to Enzyme Stabilization and Immobilization” Enz. Microb. Technol. 39 474(2006).
32. Ja Hun Kwak, Charles H.F. Peden and Janos Szanyi,“Non-thermal plasma-assisted NOx reduction over NaY Zeolites; the promotional effect of acid sites”, Catal. Lett. 109 1(2006).
31. Tamas Szailer, Ja Hun Kwak, Do Heui Kim, Janos Szanyi, Chongmin Wang and Charles H.F. Peden, ”Effects of Ba Loading and Calcinations Temperature on BaAl2O4 Formation for BaO/Al2O3 NOx Storage and Reduction Catalysts” Catal. Today 114 86(2006).
30. Haibo Zhao, Ja Hun Kwak, Yong Wang, James A. Franz, John M. White, Johnathan E. Holladay “Effects of crystallinity on dilute acid hydrolysis of cellulose” Energy & Fuels 20 807 (2006).
29. Jose E. Herrera, Ja Hun Kwak, Jian Zhi Hu, Yong Wang, Charles H.F. Peden, Josef Macht, and Enrique Iglesia “Synthesis, Characterization, and Catalytic Function of Novel Highly Dispersed Tungsten Oxide Catalysts on Mesoporous Silica” Journal of Catalysis 239 200 (2006).
28. Tamas Szailer, Ja Hun Kwak, Do Heui Kim, Jonathan C. Hanson, Charles H.F. Peden, and János Szanyi, “Reduction of Stored NOx on Pt/Al2O3 and Pt/BaO/Al2O3 Catalysts with H2 and CO” Journal of Catalysis 239, 51(2006).
27. Ja Hun Kwak, Jose E. Herrera, Jian Zhi Hu, Yong Wang and Charles H.F. Peden, “A New Class of Highly Dispersed VOx Catalysts on Mesoporous Silica: Synthesis, Characterization, and Catalytic Activity in the Partial Oxidation of Ethanol” Appl. Catal. A 300 109(2006).
26. Janos Szanyi, Ja Hun Kwak, Sarah Burton, Jose A. Rodriguez, and Charles H.F. Peden,”Characterization of NOx Species in Dehydrated and Hydrated Na- and Ba-Y,FAU Zeolites Formed in NO2 Adsorption”, J. Electron Spectroscopy and Related Phenomena 150 164(2006).
2005
25. Dohoon Lee, Jinwoo Lee, Jungbae Kim, Jaeyun Kum, Hyon Bin Na, Bokie Kim, Chae-Ho Shin, Ja Hun Kwak, Alice Dohnalkova, Jay W. Grate, Taeghwan Hyeon, and Hak-Sung Kim, “ Simple Fabrication of Highly-Sensitive and Fast Glucose Biosensor using Enzyme Immobilized in Mesocellular Carbon Foam” Adv. Mater. 17(23) 2828-2833(2005).
24. Jinwoo Lee, Dohoon Lee, Eunkeu Oh, Jaeyun Kim, Young-Pil Kim, Sunmi Jin, Hak-Sung Kim, Yosun Hwang, Ja Hun Kwak, Je-Geun Park, Chae-Ho Shin, Jungbae Kim, Taeghwan Hyeon,”Preparation of a Magnetically Switchable Bio-electrocatalytic System Employing Cross-linked Enzyme Aggregates in Magnetic Mesocellular Carbon Foam” Angew. Chem. Int. Ed. 44 7427(2005).
23. Jungbae Kim, Jinwoo Lee, Hyon Bin Na, Byoung Chan Kim, Jong Kyu Youn, Ja Hun Kwak, Karam Moon, Eunwoong Lee, Jaeyun Kim, Jongnam Park, Alice Dohnalkova, Hyun Gyu Park, Man Bock Gu, Ho Nam Chang, Jay W. Grate, and Taeghwan Hyeon, “Magnetically-Separable and Highly-Stable Enzyme System Based on Nanocomposites of Enzymes and Magnetic Nanoparticles Shipped in Hierarchically Ordered Mesocellular Mesoprous Silica” Small 1(12): 1203~1207(2005).
22. Do Heui Kim, Ya-Huei Chin, Ja Hun Kwak, Janos Szanyi, and Charles H.F. Peden, “Changes in Ba phase in BaO/Al2O3 upon thermal aging and H2O treatment”, Catal. Lett. 105 259(2005).
21. Thurston E. Herricks, Sae-Hoon Kim, Jungbae Kim, Dan Li, Ja Hun Kwak, Jay W. Grate, Song H. Kim, Younan Xia, “Direct Fabrication of Enzyme-Carrying Polymer Nanofibers by Electrospinning” J. of Mater. Chem. 15(31) 3241(2005).
20. Jinwoo Lee, Jungbae Kim, Jaeyun Kim, Hongfei Jia, Moon-Il Kim, Ja Hun Kwak, Sunmi Jin, Alice Dohnalkova, Hyun-Gyu Park, Ho-Nam Chang, Ping Wang, Jay W. Grate, Taeghwan Hyeon,”Simple Synthesis of Hierarchically Ordered Mesocellular Mesoporous Silica Materials and their Successful Application as a Host of Enzyme Immobilization” Small 1(7) 744(2005).
19. Byoung Chan Kim, Sujith Nair, Jungbae Kim, Ja Hun Kwak, Jay W Grate, Seong H Kim, and Man Bock Gu, “Preparation of biocatalytic nanofibres with high activity and stability via enzyme aggregate coating on polymer nanofibres”, Nanotechnology 16. S382(2005).
18. Janos Szanyi, Ja Hun Kwak, Jonathan Hanson, Chongmin Wang, Tamas Szailer, and Charles H.F. Peden,”The changing morphology of BaO/Al2O3 during NO2 uptake and release”, J. Phys. Chem. B 109, 7339(2005).
17. Janos Szanyi, Ja Hun Kwak and Charles H.F. Peden, “The Catalytic Chemistry of HCN + NO2 over Na- and Ba-Y,FAU: an in-situ FTIR and TPD/TPR Study”, J. Phys. Chem. B 109, 1481(2005).
16. Jian Zhi Hu, Ja Hun Kwak, Jose E. HerreraPerea, Yong Wang and Charles H.F. Peden, “Line Narrowing in 1H MAS Spectrum of Mesoporous Silica by Removing Absorbed H2O Using N2”, Solid State NMR 27, 200 (2005).
15. Janos Szanyi, Ja Hun Kwak, Do Heui Kim, Sarah Burton and Charles H.F. Peden,”NO2 adsorption on BaO/Al2O3: the nature of nitrate species”, J. Phys. Chem. B 109, 27(2005).
2004
14. S. J. Cho, J. H. Kwak, R. Ryoo and H.K. Yoon “Mechanism of Ti(IV) incorporation onto the zeolite framework probed with XAFS”, Studies in Surface Science and Catalysis 154 325 (2004).
13. Janos Szanyi, Ja Hun Kwak, Ryan A. Moline, and Charles H.F. Peden, “Adsorption, Co-adsorption, and Reaction of Acetaldehyde and NO2 on Na-Y, FAU: an in situ FTIR Investigation”, J. Phys. Chem. B 108, 17050(2004).
12. Janos Szanyi, Ja Hun Kwak and Charles H.F. Peden, ”The Effect of Water on the Adsorption of NO2 in Na-and Ba-Y, FAU Zeolites: A Combined FTIR and TPD Investigation”, J. Phys. Chem. B 108, 3746(2004).
11. Ja Hun Kwak, Janos Szanyi and Charles H.F. Peden, ”Non-thermal Plasma-assisted NOx Reduction over Alkali and Alkaline Earth Ion Exchanged Y,FAU Zeolites”, Catal. Today 89, 135(2004).
2003
10. Janos Szanyi, Ja Hun Kwak, Ryan A. Moline, and Charles H.F. Peden, “The Adsorption of NO2 and the NO+O2 Reaction on Na-Y, FAU: an in situ FTIR Investigation”, Phys. Chem. Chem. Phys. 5, 4045(2003).
9. Ja Hun Kwak, Janos Szanyi and Charles H.F. Peden,” Non-thermal Plasma-Assisted Catalytic NOx Reduction over Ba-Y,FAU: The Effect of Catalyst Preparation”, Journal of Catalysis 220, 291(2003).
1996
8. Ja Hun Kwak, Sungjune Cho and Ryong Ryoo, “A New Synthesis Procedure for Titanium-Containing Zeolites under Strong Alkaline Conditions and the Catalytic Activity for Partial Oxidation and Photocatalytic Decomposition”, Catal. Lett. 37, 217(1996).
7. I. H. Cho, S. B. Park and J. H. Kwak, ”Characterization of Mo/Al2O3 Sol-Gel Catalysts by 27Al Nuclear Magnetic Resonance Spectroscopy”. J. Mol. Catal., 104, 285(1996).
6. I. H. Cho, J. H. Kwak, R. Ryoo, W. S. Ahn, K. Y. Jung and S. B. Park, ”Photocatalytic Decomposition of Tricholoethylene over Aluminosilicate Zeolites with Isomorphous Incorporation of Titanium”, Stud. Surf. Sci. Catal. 105, 1617(1996).
1995
5. J. M. Kim, J. H. Kwak, S. Jun and R. Ryoo, “Ion Exchange and Thermal Stability of MCM-41”, J. Phys. Chem. 99, 16742(1995).
4. R. Ryoo, H. Ihee, J. H. Kwak, G. Seo and S. -B. Liu, “129Xe NMR study on a Solid-State Defect in HZSM-5 Zeolite”, Microporous Materials, 4, 59(1995).
1994
3. R. Ryoo, J. H. Kwak and L.-C. de Menorval, ”A 129Xe NMR Spectroscopic Technique to Probe Exclusively the Internal Surface of Zeolite Crystallites by Coating of the External Surface”, J. Phys. Chem. 98, 7101(1994).
1993
2. J. H. Kwak and R. Ryoo, ”Site Selective Line Broadening in Magic Angle Spinning 29Si NMR of CuX Zeolite”, J. Phys. Chem. 97, 11154(1993)
1. R. Ryoo, J. H. Kwak, L.-C. de Menorval and F. Figueras, “ 129Xe NMR Spectrum of Xenon in α-Cage of Zeolite A during Hydration and Ion Exchange”, J. Phys. Chem. 97, 4124(1993).