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4. Recent advances in non-precious group metal-based catalysts for water electrolysis and beyond

Author

Kim, Hee Jin, primary, Kim, Ho Young, additional, Joo, Jinwhan, additional, Joo, Sang Hoon, additional, Lim, June Sung, additional, Lee, Jinwoo, additional, Huang, Huawei, additional, Shao, Minhua, additional, Hu, Jue, additional, Kim, Jin Young, additional, Min, Byeong Jo, additional, Lee, Seung Woo, additional, Kang, Minsoo, additional, Lee, Kwangyeol, additional, Choi, Songa, additional, Park, Yeji, additional, Wang, Yao, additional, Li, Junjun, additional, Zhang, Zhicheng, additional, Ma, Jianmin, additional, and Choi, Sang-Il, additional

Published
2022
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8. Electrocatalysts: Pt Dopant: Controlling the Ir Oxidation States toward Efficient and Durable Oxygen Evolution Reaction in Acidic Media (Adv. Funct. Mater. 38/2020)

Author

Choi, Songa, primary, Park, Jongsik, additional, Kabiraz, Mrinal Kanti, additional, Hong, Youngmin, additional, Kwon, Taehyun, additional, Kim, Taekyung, additional, Oh, Aram, additional, Baik, Hionsuck, additional, Lee, Minseop, additional, Paek, Seung‐Min, additional, Choi, Sang‐Il, additional, and Lee, Kwangyeol, additional

Published
2020
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9. Pt Dopant: Controlling the Ir Oxidation States toward Efficient and Durable Oxygen Evolution Reaction in Acidic Media

Author

Choi, Songa, primary, Park, Jongsik, additional, Kabiraz, Mrinal Kanti, additional, Hong, Youngmin, additional, Kwon, Taehyun, additional, Kim, Taekyung, additional, Oh, Aram, additional, Baik, Hionsuck, additional, Lee, Minseop, additional, Paek, Seung‐Min, additional, Choi, Sang‐Il, additional, and Lee, Kwangyeol, additional

Published
2020
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17. Hemi-core@frame AuCu@IrNi nanocrystals as active and durable bifunctional catalysts for the water splitting reaction in acidic mediaElectronic supplementary information (ESI) available. See DOI: 10.1039/c8nh00520f

Author

ParkThese authors contributed equally to this work., Jongsik, Choi, Songa, Oh, Aram, Jin, Haneul, Joo, Jinwhan, Baik, Hionsuck, and Lee, Kwangyeol

Abstract

Highly efficient and economically sustainable hydrogen production viaelectrocatalytic water splitting can be realized by the advent of active and durable electrocatalysts toward the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Multimetallic nanoframe structures have received great attention as promising electrocatalysts for these reactions, because their inherent high surface area and tunable surface energy states are beneficial to the electrocatalyst performance. We envisaged that the stability and activity of multimetallic nanoframe catalysts could be simultaneously augmented by introducing an additional structural feature of activity-enhancing lattice mismatch viaformation of a structure-fortifying core–shell structure. Herein, we successfully demonstrate that hemi-core@frame AuCu@IrNi nanocrystals, possessing structural features of both nanoframe and core–shell, are active and durable bifunctional catalysts toward both the OER and HER under acidic conditions. The hemicore@frame AuCu@IrNi nanocrystals exhibit superior efficient electrocatalytic performance toward the overall water splitting reaction, and show 355 mV overpotential at the current density of 10 mA cm−2in a 0.5 M H2SO4electrolyte. The robustness of the catalysts was also verified through the long-term stability test.

Published
2019
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18. Potential Link between Cu Surface and Selective CO 2 Electroreduction: Perspective on Future Electrocatalyst Designs.

Author

Tomboc GM, Choi S, Kwon T, Hwang YJ, and Lee K

Abstract

Electrochemical reduction of carbon dioxide (CO 2 RR) product distribution has been identified to be dependent on various surface factors, including the Cu facet, morphology, chemical states, doping, etc., which can alter the binding strength of key intermediates such as *CO and *OCCO during reduction. Therefore, in-depth knowledge of the Cu catalyst surface and identification of the active species under reaction conditions aid in designing efficient Cu-based electrocatalysts. This progress report categorizes various Cu-based electrocatalysts into four main groups, namely metallic Cu, Cu alloys, Cu compounds (Cu + non-metal), and supported Cu-based catalysts (Cu supported by carbon, metal oxides, or polymers). The detailed mechanisms for the selective CO 2 RR are presented, followed by recent relevant developments on the synthetic procedures for preparing Cu and Cu-based nanoparticles. Herein, the potential link between the Cu surface and CO 2 RR performance is highlighted, especially in terms of the chemical states, but other significant factors such as defective sites and roughened morphology of catalysts are equally considered during the discussion of current studies of CO 2 RR with Cu-based electrocatalysts to fully understand the origin of the significant enhancement toward C 2 formation. This report concludes by providing suggestions for future designs of highly selective and stable Cu-based electrocatalysts for CO 2 RR., (© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Published
2020
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