Abstract: Water splitting is essential for the conversion and storage of renewable energy such as wind, tidal, and solar energy. Oxygen evolution reaction (OER) is the bottleneck of water splitting, due to the sluggish four-electron transfer process. An efficient and durable electrocatalyst is required to improve the overall efficiency of electrolysis. Metal oxides have been widely investigated in the past few decades, and are considered as the most promising OER electrocatalyst, given the low cost and moderate performance. The rational design of efficient catalysts firstly calls for a better understanding of the OER mechanism. Much efforthas been devoted to providing insights to elucidate the detailed mechanism. The traditional adsorption-desorption model was learned from heterogeneous catalysis and worked to search for descriptors, which guides the fast screen of advanced electrocatalysts. More recently, the traditional mechanism has been progressively challenged. The high activity and kinetics of some new electrocatalysts can not be fully explained or even contradict the traditional mechanism, which in turn preclude the exploration of novel electrocatalysts. Thanks to the development of advanced characterization techniques and theoretical calculation methods in recent years, the understanding of the OER mechanism has been pushed forwards well. New catalytic mechanisms have been proposed and validated, which sheds light on the rational design of advanced electrocatalysts. These new mechanisms include: lattice oxygen evolution mechanism (LOM), dual-sites mechanism with O-O bond coupling, proton acceptor mechanism. In addition, the mechanism of cation dissolution has also been elucidated in some cases to explain the stability of the catalysts. In this review, we start with the introduction of metal oxides and the traditional OER mechanisms. Following this, we systematically summarize the newly proposed mechanisms of lattice oxygen evolution mechanism (LOM), dual-sites mechanism with O-O bond coupling, proton acceptor mechanism, and cation dissolution mechanism. The representative researches on theoretical calculation and descriptors are highlighted. In the end, present challenges are discussed and suggestions that are potentially interesting for future studies are provided for the hotly developed field. We hope the review will become an important tutorial for the field, pushing forwards the fast exploration of advanced OER electrocatalysts.
作者简介: 王思弘,2018年6月毕业于西安交通大学,获得工学学士学位;2021年6月毕业于上海交通大学,获工学硕士学位。目前在宋钫副教授课题组任研究助理,主要研究方向为析氧电催化机理。 宋钫,上海交通大学材料科学与工程学院副教授、博士研究生导师。2006年在上海交通大学材料科学与工程学院获得工学学士学位, 2012年在上海交通大学获得材料学博士学位。2013年5月至2018年6月赴瑞士洛桑联邦理工学院开展博士后研究工作,2018年9月加入上海交通大学金属基复合材料国家重点实验室,任职副教授。主要从事能源电催化材料的研究。至今在Nature Communication、Journal of the American Chemical Society、 Energy & Environmental Science、ACS Central Science、Joule、Advanced Functional Materials等国际著名期刊发表论文 27篇。
引用本文:
王思弘, 宋钫. 金属氧化物电催化析氧机理的研究进展[J]. 材料导报, 2022, 36(23): 21030163-13.
WANG Sihong, SONG Fang. Research Progress in Oxygen Evolution Reaction Mechanism of Metal Oxides. Materials Reports, 2022, 36(23): 21030163-13.
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