Strong Interaction Heterointerface of Nife Oxyhydroxide/Cerium Oxide for Efficient and Stable Water Oxidation

作     者：Jiao, Han Wang, Chun Tian, Hao Zhang, Zi-Yang Zhao, Yang Na, Ping Yamauchi, Yusuke Wang, Zhong-Li 

作者机构：Tianjin Laboratory of Mass Transfer & Separation Process Tianjin Key Laboratory of Applied Catalysis Science & Technology School of Chemical Engineering and Technology Tianjin University Tianjin300354 China Research Institute of Petroleum Processing SINOPEC Beijing100083 China  The University of Queensland BrisbaneQLD4072 Australia Department of Materials Process Engineering Graduate School of Engineering Nagoya University Nagoya464−8603 Japan 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Cerium oxide 

摘      要：NiFe oxyhydroxides (NiFeOxHy) are the benchmark catalysts for alkaline oxygen evolution reaction (OER), however, it is still challenging for these electrocatalysts to achieve both high activity and long-term stability. Herein, we demonstrate that strong interaction heterointerface of NiFeOxHy/cerium oxide (CeO2) can control the reconstruction process of NiFeOxHy and the reaction pathway of OER, which simultaneously improves the activity and stability of the catalyst. Interestingly, after electrochemical activation, with and without CeO2, NiFeOxHy oxyhydroxides exhibit completely different structures, with the former being uniformly distributed ultrafine nanosheets and the latter being spherical agglomerates of larger sized nanosheets. The strong heterointerface interaction induces the electrons of Ni and Fe to shift to Ce. The optimized catalyst exhibits a low overpotential of 240 mV at 100 mA cm-2 with the durability over 2000 h at 200 mA cm-2. The OER mechanism studies indicate that NiFeOxHy/CeO2 heterointerface follows lattice oxygen oxidation mechanism with accelerated kinetics. © 2024, The Authors. All rights reserved.