Search Results - "Choi, Chang Hyuck"

Stability of Fe-N-C Catalysts in Acidic Medium Studied by Operando Spectroscopy by Choi, Chang Hyuck, Baldizzone, Claudio, Grote, Jan-Philipp, Schuppert, Anna K., Jaouen, Frédéric, Mayrhofer, Karl J. J.

“…Fundamental understanding of non‐precious metal catalysts for the oxygen reduction reaction (ORR) is the nub for the successful replacement of noble Pt in fuel…”
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Rational Design of a Hierarchical Tin Dendrite Electrode for Efficient Electrochemical Reduction of CO2 by Won, Da Hye, Choi, Chang Hyuck, Chung, Jaehoon, Chung, Min Wook, Kim, Eun-Hee, Woo, Seong Ihl

“…Catalysis is a key technology for the synthesis of renewable fuels through electrochemical reduction of CO2. However, successful CO2 reduction still suffers…”
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Graphene-derived Fe/Co-N-C catalyst in direct methanol fuel cells: Effects of the methanol concentration and ionomer content on cell performance by Park, Jong Cheol, Choi, Chang Hyuck

“…Non-precious metal catalysts (typically Fe(Co)-N-C catalysts) have been widely investigated for use as cost-effective cathode materials in low temperature fuel…”
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Unraveling the Nature of Sites Active toward Hydrogen Peroxide Reduction in Fe‐N‐C Catalysts by Choi, Chang Hyuck, Choi, Won Seok, Kasian, Olga, Mechler, Anna K., Sougrati, Moulay Tahar, Brüller, Sebastian, Strickland, Kara, Jia, Qingying, Mukerjee, Sanjeev, Mayrhofer, Karl J. J., Jaouen, Frédéric

“…Fe‐N‐C catalysts with high O2 reduction performance are crucial for displacing Pt in low‐temperature fuel cells. However, insufficient understanding of which…”
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Photoelectrochemical production of formic acid and methanol from carbon dioxide on metal-decorated CuO/Cu2O-layered thin films under visible light irradiation by Won, Da Hye, Choi, Chang Hyuck, Chung, Jaehoon, Woo, Seong Ihl

“…As a cathode material for fuel generation from CO2 reduction in a photoelectrochemical system, layered CuO/Cu2O films were developed and their surfaces were…”
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Effect of Pt introduced on Ru-based electrocatalyst for oxygen evolution activity and stability by Yi, Jaekyung, Lee, Woong Hee, Choi, Chang Hyuck, Lee, Yuri, Park, Kyung Su, Min, Byoung Koun, Hwang, Yun Jeong, Oh, Hyung-Suk

“…Ru-based electrocatalysts are generally known to be suitable for the oxygen evolution reaction (OER), but they have intrinsic problems in balancing catalytic…”
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Nitrogen-doped graphene/carbon nanotube self-assembly for efficient oxygen reduction reaction in acid media by Choi, Chang Hyuck, Chung, Min Wook, Kwon, Han Chang, Chung, Jae Hoon, Woo, Seong Ihl

“…•Graphene/CNT self-assembly was prepared for oxygen reduction reactions.•Presence of CNTs assists transfer of electrons and reactants to active sites.•The…”
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Unraveling the role of introduced W in oxidation tolerance for Pt-based catalysts via on-line inductive coupled plasma-mass spectrometry by Ho Han, Man, Ko, Young-Jin, Koun Min, Byoung, Yu, Seung-Ho, Hyuck Choi, Chang, Choi, Jae-Young, Hee Lee, Woong, Oh, Hyung-Suk

“…[Display omitted] •Cathodic Pt dissolution occurring under reducing environments should be avoided.•The developed PtW/C exhibits low cathodic Pt dissolution.•W…”
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Facile growth of N-doped CNTs on Vulcan carbon and the effects of iron content on electrochemical activity for oxygen reduction reaction by Choi, Chang Hyuck, Park, Sung Hyeon, Woo, Seong Ihl

“…In order to develop cheap electrochemical oxygen reduction reaction (ORR) catalysts, N-doped CNTs grafted on Vulcan carbon were synthesized via pyrolysis of…”
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Tuning selectivity of electrochemical reactions by atomically dispersed platinum catalyst by Choi, Chang Hyuck, Kim, Minho, Kwon, Han Chang, Cho, Sung June, Yun, Seongho, Kim, Hee-Tak, Mayrhofer, Karl J. J., Kim, Hyungjun, Choi, Minkee

“…Maximum atom efficiency as well as distinct chemoselectivity is expected for electrocatalysis on atomically dispersed (or single site) metal centres, but its…”
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On the importance of the electric double layer structure in aqueous electrocatalysis by Shin, Seung-Jae, Kim, Dong Hyun, Bae, Geunsu, Ringe, Stefan, Choi, Hansol, Lim, Hyung-Kyu, Choi, Chang Hyuck, Kim, Hyungjun

“…To design electrochemical interfaces for efficient electric-chemical energy interconversion, it is critical to reveal the electric double layer (EDL) structure…”
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A unifying mechanism for cation effect modulating C1 and C2 productions from CO2 electroreduction by Shin, Seung-Jae, Choi, Hansol, Ringe, Stefan, Won, Da Hye, Oh, Hyung-Suk, Kim, Dong Hyun, Lee, Taemin, Nam, Dae-Hyun, Kim, Hyungjun, Choi, Chang Hyuck

“…Electrocatalysis, whose reaction venue locates at the catalyst–electrolyte interface, is controlled by the electron transfer across the electric double layer,…”
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Electrocatalytic synthesis of hydrogen peroxide on Au-Pd nanoparticles: From fundamentals to continuous production by Pizzutilo, Enrico, Kasian, Olga, Choi, Chang Hyuck, Cherevko, Serhiy, Hutchings, Graham J., Mayrhofer, Karl J.J., Freakley, Simon J.

“…[Display omitted] •ORR activity and selectivity are tested using a RRDE for different AuPd compositions.•Size-controlled nanoparticles are immobilized directly…”
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Long-Range Electron Transfer over Graphene-Based Catalyst for High-Performing Oxygen Reduction Reactions: Importance of Size, N‑doping, and Metallic Impurities by Choi, Chang Hyuck, Lim, Hyung-Kyu, Chung, Min Wook, Park, Jong Cheol, Shin, Hyeyoung, Kim, Hyungjun, Woo, Seong Ihl

“…N-doped carbon materials are considered as next-generation oxygen reduction reaction (ORR) catalysts for fuel cells due to their prolonged stability and low…”
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Selective electrochemical reduction of nitric oxide to hydroxylamine by atomically dispersed iron catalyst by Kim, Dong Hyun, Ringe, Stefan, Kim, Haesol, Kim, Sejun, Kim, Bupmo, Bae, Geunsu, Oh, Hyung-Suk, Jaouen, Frédéric, Kim, Wooyul, Kim, Hyungjun, Choi, Chang Hyuck

“…Electrocatalytic conversion of nitrogen oxides to value-added chemicals is a promising strategy for mitigating the human-caused unbalance of the global…”
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High crystallinity design of Ir-based catalysts drives catalytic reversibility for water electrolysis and fuel cells by Lee, Woong Hee, Ko, Young-Jin, Kim, Jung Hwan, Choi, Chang Hyuck, Chae, Keun Hwa, Kim, Hansung, Hwang, Yun Jeong, Min, Byoung Koun, Strasser, Peter, Oh, Hyung-Suk

“…The voltage reversal of water electrolyzers and fuel cells induces a large positive potential on the hydrogen electrodes, followed by severe system…”
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Theoretical and Experimental Understanding of Hydrogen Evolution Reaction Kinetics in Alkaline Electrolytes with Pt-Based Core–Shell Nanocrystals by Kim, Jeonghyeon, Kim, Haesol, Lee, Won-Jae, Ruqia, Bibi, Baik, Hionsuck, Oh, Hyung-Suk, Paek, Seung-Min, Lim, Hyung-Kyu, Choi, Chang Hyuck, Choi, Sang-Il

“…The free energy of H adsorption (ΔG H) on a metallic catalyst has been taken as a descriptor to predict the hydrogen evolution reaction (HER) kinetics but has…”
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NOx-induced deactivation of Pt electrocatalysis towards the ammonia oxidation reaction by Kim, Haesol, Chung, Min Wook, Choi, Chang Hyuck

“…An understanding of the deactivation mechanism of Pt electrocatalysis towards the ammonia oxidation reaction (AOR) to dinitrogen is key to the successful…”
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Catalytic Surface Specificity of Ni(OH)2‐Decorated Pt Nanocubes for the Hydrogen Evolution Reaction in an Alkaline Electrolyte by Hong, Youngmin, Choi, Chang Hyuck, Choi, Sang‐Il

“…Because the hydrogen evolution reaction (HER) in alkaline electrolyzers is initiated by water dissociation, the hydrogen evolution kinetics are sluggish even…”
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Editorial overview: Electrochemical materials and engineering (2023), multidisciplinary by essence by Jaouen, Frédéric, Hyuck Choi, Chang

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