High-entropy catalysts for electrochemical water-electrolysis of hydrogen evolution and oxygen evolution reactions

Simiao Sha1, Riyue Ge1,2, Ying Li1, Julie M. Cairney3, Rongkun Zheng4, Sean Li5, Bin Liu1, Jiujun Zhang6, Wenxian Li1,5
1School of Materials Science and Engineering, Shanghai University, Shanghai, China
2School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, China
3Australian Centre for Microscopy and Microanalysis; School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, Australia
4School of Physics, The University of Sydney, Sydney, Australia
5School of Materials Science and Engineering; UNSW Materials & Manufacturing Futures Institute, University of New South Wales, Sydney, Australia
6College of Materials Science and Engineering, Fuzhou University, Fuzhou, China

Tóm tắt

High entropy materials (HEMs) have developed rapidly in the field of electrocatalytic water-electrolysis for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) due to their unique properties. In particular, HEM catalysts are composed of many elements. Therefore, they have rich active sites and enhanced entropy stability relative to single atoms. In this paper, the preparation strategies and applications of HEM catalysts in electrochemical water-electrolysis are reviewed to explore the stabilization of HEMs and their catalytic mechanisms as well as their application in support green hydrogen production. First, the concept and four characteristics of HEMs are introduced based on entropy and composition. Then, synthetic strategies of HEM catalysts are systematically reviewed in terms of the categories of bottom-up and top-down. The application of HEMs as catalysts for electrochemical water-electrolysis in recent years is emphatically discussed, and the mechanisms of improving the performance of electrocatalysis is expounded by combining theoretical calculation technology and ex-situ/in situ characterization experiments. Finally, the application prospect of HEMs is proposed to conquer the challenges in HEM catalyst fabrications and applications.

Tài liệu tham khảo

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