Chlorine-anion doping induced multi-factor optimization in perovskites for boosting intrinsic oxygen evolution

• 来源期刊: 能源化学
• 年，卷（期）: 2021,（1）
• 页码范围: 115-120
• 页数: 6页
• 语种: 英文

摘要

The oxygen evolution reaction(OER)plays a crucial role in many electrochemical energy technologies,and creating multiple beneficial factors for OER catalysis is desirable for achieving high catalytic effi-ciency.Here,we highlight a new halogen-chlorine(CI)-anion doping strategy to boost the OER activity of perovskite oxides.As a proof-of-concept,proper Cl doping at the oxygen site of LaFe03(LFO)per-ovskite can induce multiple favorable characteristics for catalyzing the OER,including rich oxygen va-cancies,increased electrical conductivity and enhanced Fe-0 covalency.Benefiting from these factors,the LaFe02.9-δCl0.1(LFOCl)perovskite displays significant intrinsic activity enhancement by a factor of around three relative to its parent LFO.This work uncovers the effect of Cl-anion doping in perovskites on pro-moting OER performance and paves a new way to design highly efficient electrocatalysts.