期刊
CHINESE JOURNAL OF CATALYSIS
卷 41, 期 12, 页码 1855-1863出版社
SCIENCE PRESS
DOI: 10.1016/S1872-2067(20)63638-5
关键词
Cation-substituted spinel cobaltites; Crystal field; Oxygen evolution reaction; Water-splitting; Electrocatalysis
资金
- National Natural Science Foundation of China [21938001, 21576302, 21878344, 21961160741]
- Natural Science Foundation of China-SINOPEC Joint Fund [U1663220]
- Featured Innovation Project of Guangdong Education Department [2018KTSCX144, 2016KTSCX087]
- Guangdong Provincial Key RD Programme [2019B110206002]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01C102]
- Scientific Research Fund of Natural Science Foundation of Guangdong University of Petrochemical Technology [2019rc019, 2019rc053]
- Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2019)
- Key Natural Science Research Projects of Guangdong Provincial Universities [2019KZDXM010]
- Guangdong Basic and Applied Basic Research Foundation [2019A1515011249]
- UK Engineering and Physical Sciences Research Council (EPSRC) [EP/P018998/1]
- Newton Mobility Grant through the Royal Society [IE161019]
Cation substitution in spinel cobaltites (e.g., ACo(2)O(4), in which A = Mn, Fe, Co, Ni, Cu, or Zn) is a promising strategy to precisely modulate their electronic structure/properties and thus improve the corresponding electrochemical performance for water splitting. However, the fundamental principles and mechanisms are not fully understood. This research aims to systematically investigate the effects of cation substitution in spinel cobaltites derived from mixed-metal-organic frameworks on the oxygen evolution reaction (OER). Among the obtained ACo(2)O(4) catalysts, FeCo2O4 showed excellent OER performance with a current density of 10 mA.cm(-2) at an overpotential of 164 mV in alkaline media. Both theoretical calculations and experimental results demonstrate that the Fe substitution in the crystal lattice of ACo(2)O(4) can significantly accelerate charge transfer, thereby achieving enhanced electrochemical properties. The crystal field of spinel ACo(2)O(4), which determines the valence states of cations A, is identified as the key factor to dictate the OER performance of these spinel cobaltites. (C) 2020, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据