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

• 作 者: Yinlong Zhu Qian Lin Zhenbin Wang Dongchen Qi Yichun Yin Yu Liu Xiwang Zhang Zongping Shao Huanting Wang
• 机 构: Department of Chemical Engineering,Monash University,Clayton,VIC 3800,Australia;Department of Physic
• 出 处: 能源化学
• 发表日期: 2021年1期
• 关键词: Anion doping Halogen chlorine Multiple beneficial factors Oxygen evolution react

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.