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논문 기본 정보

자료유형
학술저널
저자정보
Hong Seong Park (Chung-Ang University) Kyeong‑Rim Yeo (Chung-Ang University) Won Suk Jung (Hankyong National University) Soo‑Kil Kim (Chung-Ang University)
저널정보
대한금속·재료학회 Electronic Materials Letters Electronic Materials Letters Vol.20 No.3
발행연도
2024.5
수록면
293 - 305 (13page)
DOI
https://doi.org/10.1007/s13391-023-00457-w

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In this study, we investigated ternary transition metal catalysts composed of Cu, Ni, and Mo for application to hydrogenoxidation reaction (HOR) in alkaline electrolyte. A series of catalysts with a wide range of elemental compositions werefabricated by a simple electrodeposition method, and their material and electrochemical properties were investigated. Inparticular, to avoid inaccurate activity measurements due to oxidation and reduction of the transition metal-based catalystsduring the HOR test, the electrochemical measurements were performed in both H 2 - and N 2 -saturated electrolytes, and theresults were compared. The fabricated CuNiMo catalyst with an optimized composition exhibited an excellent HOR activityof 2.03 mA cm −2 at 0.1 V RHE , while the current density decreased only by 0.55 mA cm −2 after 3000 cycles. The enhancedHOR activity is attributed to the combined effects of the modifi ed crystal structure, increased surface area, alloying effectsbenefi cial to the hydrogen binding energy and OH − binding energy, and appropriate surface compositions between theH-adsorbing metallic state and OH-adsorbing oxophilic states. The characteristics of the catalyst demonstrated in this studycan provide insights for the development of non-precious catalysts for HOR in alkaline electrolytes.

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