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説明:

Most nonoxide catalysts based on transition metal elements will inevitably change their primitive phases under anodicoxidation conditions in alkaline media. Establishing a relationship between the bulk phase and surface evolution is imperative toreveal the intrinsic catalytic active sites. In this work, it is demonstrated that the introduction of Fe facilitates the phase transition oforthorhombic CoSe2 into its cubic counterpart and then accelerates the Co−Fe hydroxide layer generation on the surface duringelectrocatalytic oxygen evolution reaction (OER). As a result, the Fe-doped cubic CoSe2 catalyst exhibits a significantly enhancedactivity with a considerable overpotential decrease of 79.9 and 66.9 mV to deliver 10 mA·cm−2 accompanied by a Tafel slope of 48.0mV·dec−1 toward OER when compared to orthorhombic CoSe2 and Fe-doped orthorhombic CoSe2, respectively. Density functionaltheory (DFT) calculations reveal that the introduction of Fe on the surface hydroxide layers will tune electron density around Coatoms and raise the d-band center. These findings will provide deep insights into the surface reconstitution of the OER　electrocatalysts based on transition metal elements.

権利情報:

• In Copyright
  This document is the Accepted Manuscript version of a Published Work that appeared in final form in Inorganic Chemistry, copyright © 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.inorgchem.4c00568

キーワード: Oxygen evolution reaction, Electrocatalysis

刊行年月日: 2024-04-22

出版者: American Chemical Society (ACS)

掲載誌:

• Inorganic Chemistry (ISSN: 00201669) vol. 63 issue. 16 p. 7430-7441

研究助成金:

• Natural Science Foundation of Hunan Province 2019JJ10006
• National Natural Science Foundation of China 51874357
• National Natural Science Foundation of China U20A20123
• Youth Talent Program of Zhengzhou University 32340398
• Zhongyuan Critical Metals Laboratory GJJSGFYQ202336

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4540

公開URL: https://doi.org/10.1021/acs.inorgchem.4c00568

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更新時刻: 2025-04-14 16:30:42 +0900

MDRでの公開時刻: 2025-04-14 14:56:25 +0900