Search Results - "Chung, Hoon T."

Progress in the Development of Fe‐Based PGM‐Free Electrocatalysts for the Oxygen Reduction Reaction by Martinez, Ulises, Komini Babu, Siddharth, Holby, Edward F., Chung, Hoon T., Yin, Xi, Zelenay, Piotr

“…Development of alternative energy sources is crucial to tackle challenges encountered by the growing global energy demand. Hydrogen fuel, a promising way to…”
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Active and stable carbon nanotube/nanoparticle composite electrocatalyst for oxygen reduction by Chung, Hoon T., Won, Jong H., Zelenay, Piotr

“…Nanostructured carbon-based materials, such as nitrogen-doped carbon nanotube arrays, Co 3 O 4 /nitrogen-doped graphene hybrids and carbon nanotube–graphene…”
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Resolving Electrode Morphology’s Impact on Platinum Group Metal-Free Cathode Performance Using Nano-CT of 3D Hierarchical Pore and Ionomer Distribution by Komini Babu, Siddharth, Chung, Hoon T, Zelenay, Piotr, Litster, Shawn

“…This article reports on the characterization of polymer electrolyte fuel cell (PEFC) cathodes featuring a platinum group metal-free (PGM-free) catalyst using…”
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Highly quaternized polystyrene ionomers for high performance anion exchange membrane water electrolysers by Li, Dongguo, Park, Eun Joo, Zhu, Wenlei, Shi, Qiurong, Zhou, Yang, Tian, Hangyu, Lin, Yuehe, Serov, Alexey, Zulevi, Barr, Baca, Ehren Donel, Fujimoto, Cy, Chung, Hoon T., Kim, Yu Seung

“…Alkaline anion exchange membrane (AEM) electrolysers to produce hydrogen from water are still at an early stage of development, and their performance is far…”
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Phenyl Oxidation Impacts the Durability of Alkaline Membrane Water Electrolyzer by Li, Dongguo, Matanovic, Ivana, Lee, Albert S, Park, Eun Joo, Fujimoto, Cy, Chung, Hoon T, Kim, Yu Seung

“…The durability of alkaline anion exchange membrane (AEM) electrolyzers is a critical requirement for implementing this technology in cost-effective hydrogen…”
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Role of two carbon phases in oxygen reduction reaction on the Co–PPy–C catalyst by Chung, Hoon T., Wu, Gang, Li, Qing, Zelenay, Piotr

“…In spite of a significant progress in their performance in recent years, the heat-treated metal-nitrogen–carbon (M-N–C) non-precious metal catalysts for oxygen…”
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Direct atomic-level insight into the active sites of a high-performance PGM-free ORR catalyst by Chung, Hoon T., Cullen, David A., Higgins, Drew, Sneed, Brian T., Holby, Edward F., More, Karren L., Zelenay, Piotr

“…Platinum group metal–free (PGM-free) metal-nitrogen-carbon catalysts have emerged as a promising alternative to their costly platinum (Pt)–based counterparts…”
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High-Activity PtRuPd/C Catalyst for Direct Dimethyl Ether Fuel Cells by Li, Qing, Wen, Xiaodong, Wu, Gang, Chung, Hoon T., Gao, Rui, Zelenay, Piotr

“…Dimethyl ether (DME) has been considered as a promising alternative fuel for direct‐feed fuel cells but lack of an efficient DME oxidation electrocatalyst has…”
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Elucidation of Fe-N-C electrocatalyst active site functionality via in-situ X-ray absorption and operando determination of oxygen reduction reaction kinetics in a PEFC by Osmieri, Luigi, Ahluwalia, Rajesh K., Wang, Xiaohua, Chung, Hoon T., Yin, Xi, Kropf, A. Jeremy, Park, Jaehyung, Cullen, David A., More, Karren L., Zelenay, Piotr, Myers, Deborah J., Neyerlin, K.C.

“…[Display omitted] •ORR kinetics was determined for a PGM-free catalyst in a PEFC environment.•Exchange current density, activation energy, and reaction order…”
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Highly Graphitic Mesoporous Fe,N-Doped Carbon Materials for Oxygen Reduction Electrochemical Catalysts by Kim, Donghun, Zussblatt, Niels P, Chung, Hoon T, Becwar, Shona M, Zelenay, Piotr, Chmelka, Bradley F

“…The synthesis, characterization, and electrocatalytic properties of mesoporous carbon materials doped with nitrogen atoms and iron are reported and compared…”
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Phosphate-Tolerant Oxygen Reduction Catalysts by Li, Qing, Wu, Gang, Cullen, David A, More, Karren L, Mack, Nathan H, Chung, Hoon T, Zelenay, Piotr

“…Increased oxygen reduction reaction (ORR) kinetics, improved CO tolerance, and more efficient water and heat management represent significant advantages that…”
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Cyanamide-derived non-precious metal catalyst for oxygen reduction by Chung, Hoon T., Johnston, Christina M., Artyushkova, Kateryna, Ferrandon, Magali, Myers, Deborah J., Zelenay, Piotr

“…Cyanamide was used in the preparation series of metal–nitrogen–carbon (M–N–C) oxygen reduction catalysts. The best catalyst, treated at 1050 °C, shows good…”
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Understanding water management in platinum group metal-free electrodes using neutron imaging by Komini Babu, Siddharth, Spernjak, Dusan, Mukundan, Rangachary, Hussey, Daniel S., Jacobson, David L., Chung, Hoon T., Wu, Gang, Steinbach, Andrew J., Litster, Shawn, Borup, Rod L., Zelenay, Piotr

“…Platinum group metal-free (PGM-free) catalysts are a low-cost alternative to expensive PGM catalysts for polymer electrolyte fuel cells. However, due to the…”
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Impact of ionomer adsorption on alkaline hydrogen oxidation activity and fuel cell performance by Li, Dongguo, Chung, Hoon T., Maurya, Sandip, Matanovic, Ivana, Kim, Yu Seung

“…•Catalyst-ionomer interaction plays a critical role in the alkaline HOR.•The co-adsorption of cation-hydroxide-water causes the H2 diffusion issue.•The phenyl…”
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Ternary PtRuPd/C Catalyst for High-Performance, Low-Temperature Direct Dimethyl Ether Fuel Cells by Dumont, Joseph H., Martinez, Ulises, Chung, Hoon T., Zelenay, Piotr

“…Dimethyl ether (DME) is a promising alternative fuel option for direct‐feed low‐temperature fuel cells. Until recently, DME had not received the same attention…”
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Inside Back Cover: Ternary PtRuPd/C Catalyst for High-Performance, Low-Temperature Direct Dimethyl Ether Fuel Cells (ChemElectroChem 10/2016) by Dumont, Joseph H., Martinez, Ulises, Chung, Hoon T., Zelenay, Piotr

“…The Inside Back Cover picture illustrates a direct dimethyl ether fuel cell, which exhibits a performance comparable to that of the state‐of‐the‐art direct…”
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High-Activity PtRuPd/C Catalyst for Direct Dimethyl Ether Fuel Cells by Li, Qing, Wen, Xiaodong, Wu, Gang, Chung, Hoon T., Gao, Rui, Zelenay, Piotr

“…Dimethyl ether (DME) has been considered as a promising alternative fuel for direct‐feed fuel cells but lack of an efficient DME oxidation electrocatalyst has…”
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La–Sr–Co oxide catalysts for oxygen evolution reaction in anion exchange membrane water electrolyzer: The role of electrode fabrication on performance and durability by Osmieri, Luigi, He, Yanghua, Chung, Hoon T., McCool, Geoffrey, Zulevi, Barr, Cullen, David A., Zelenay, Piotr

“…Anion exchange membrane water electrolysis is an attractive technology for low-cost generation of “green” hydrogen by combining the use of noble metal-free…”
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Durability evaluation of a Fe–N–C catalyst in polymer electrolyte fuel cell environment via accelerated stress tests by Osmieri, Luigi, Cullen, David A., Chung, Hoon T., Ahluwalia, Rajesh K., Neyerlin, K.C.

“…An “atomically-dispersed” iron-nitrogen-carbon (Fe–N–C) catalyst was used to provide a systematic comparison of platinum group metal (PGM)-free electrocatalyst…”
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La–Sr–Co oxide catalysts for oxygen evolution reaction in anion exchange membrane water electrolyzer: The role of electrode fabrication on performance and durability by Osmieri, Luigi, He, Yanghua, Chung, Hoon T., McCool, Geoffrey, Zulevi, Barr, Cullen, David A., Zelenay, Piotr

“…Anion exchange membrane water electrolysis is an attractive technology for low-cost generation of “green” hydrogen by combining the use of noble metal-free…”
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