Tuning oxygen vacancies on LaFeO3 perovskite as efficient electrocatalysts for oxygen evolution reaction

被引：37
作者：
Peng, Xiangfeng [1 ]
Zheng, Jingxuan [1 ]
Zhang, Yi [1 ]
Wang, Zhao [1 ]
机构：
[1] Tianjin Univ, Natl Engn Res Ctr Ind Crystallizat Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
来源：
MATERIALS LETTERS | 2022年 / 309卷
基金：
中国国家自然科学基金;
关键词：
Defects; Semiconductors; LaFeO; 3; perovskite; Oxygen vacancy; Oxygen evolution reaction; Plasma; REDUCTION; OXIDES;
D O I：
10.1016/j.matlet.2021.131317
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxygen vacancies in lanthanum-iron oxide perovskite were produced by plasma. The vacancy concentration was facilely tuned by plasma forming-gas following the order of Ar > O2 > H2/Ar. The oxygen vacancies obviously promoted oxygen evolution reaction (OER) performance. O2-plasma produced a moderate concentration of oxygen vacancy in LaFeO3 which exhibited the highest OER activity. DFT calculations confirmed that the weak hydroxyl adsorption was improved by oxygen vacancy, but excessive oxygen vacancies reduced the OER activity with strong hydroxyl adsorption energy.
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页数：4
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