析氧
钙钛矿(结构)
催化作用
氧化物
电解水
化学计量学
材料科学
分解水
化学工程
曲面重建
浸出(土壤学)
化学
电解
纳米技术
无机化学
化学物理
物理化学
曲面(拓扑)
冶金
结晶学
有机化学
电极
光催化
地质学
土壤水分
土壤科学
几何学
数学
工程类
电解质
电化学
作者
Haiyan Li,Yubo Chen,Justin Zhu Yeow Seow,Chuntai Liu,Adrian C. Fisher,Joel W. Ager,Zhichuan J. Xu
出处
期刊:Small science
[Wiley]
日期:2021-10-27
卷期号:2 (1): 2100048-2100048
被引量:19
标识
DOI:10.1002/smsc.202100048
摘要
Developing highly active electrocatalysts for oxygen evolution reaction (OER) is crucial for the scalable production of renewable hydrogen fuels by water electrolysis. Perovskite oxides are extensively studied as OER catalysts as they can have high activity and also offer considerable flexibility in composition and structure. Recently, there are increasingly numerous reports regarding dynamic surface reconstruction of perovskite oxides under OER conditions, with claims that the reconstruction-derived species are the actual catalysts responsible for the measured OER activity. To enable rational design of perovskite oxides as precatalysts to generate actual active components in situ, gaining essential understanding of their reconstruction behaviors is crucial. This perspective discusses the roles of initial bulk chemistry in the surface evolution process of perovskite oxides during OER, including the dependency of surface stability on electronic structure of the precatalyst and the possibility of occurrence of lattice oxygen evolution reaction and cation leaching on the surface of a perovskite oxide precatalyst. It is reasonably argued that tailoring the bulk properties of perovskite precatalysts, such as electronic structure, crystallographic structure, and ion stoichiometry, can influence the occurrence of surface reconstruction and the formation of actual active surface species.
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