Facile surface defect engineering on perovskite oxides for enhanced OER performance

被引：11
|
作者：
Li, Shu-Fang [1 ,2 ]
Zheng, Jie [1 ]
Hu, Liang [1 ]
Ma, Yao [1 ]
Yan, Dong [1 ,2 ]
机构：
[1] Anhui Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Mol Solids, Minist Educ, Wuhu, Anhui, Peoples R China
[2] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China
来源：
DALTON TRANSACTIONS | 2023年 / 52卷 / 13期
基金：
中国国家自然科学基金;
关键词：
OXYGEN EVOLUTION REACTION; CATALYST; ELECTROCATALYSTS; RECONSTRUCTION; ELECTROLYSIS; METALS; CO;
D O I：
10.1039/d2dt04019k
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Perovskite oxides have been considered as potential alternative electrocatalysts in the oxygen evolution reaction (OER) field. In this work, a sequence of excellent OER perovskite catalysts was obtained by immersing Sr2CoFeO6 in a diluted HNO3 solution. Therein, the 24 h etched Sr2CoFeO6 sample (SCFO-24) exhibits the best OER activity, with an overpotential of 300 mV at 10 mA cm(-2) and a Tafel slope of 59.62 mV dec(-1). The improved OER activity of SCFO-24 can be attributed to the enhanced specific surface area derived from selective dissolution of a large amount of Sr and the high ratio of oxidative oxygen species (O2-/O-). Our work promotes this simple but efficient approach to improving the OER performance of perovskite oxides.
引用
收藏
页码：4207 / 4213
页数：7
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