Probing trace Pt incorporated SrIrO_(3) perovskite for efficient and stable acidic water oxidation  

作　　者：Yonglong Huang Huangwei Xiao Beibei He Wenjia Ma Xueqin Liu Zhuangzhuang Wu Wenxin Wang Ling Zhao Qi Chen 

机构地区：[1]School of Marine Science and Engineering,Hainan University,Haikou 570228,Hainan,China [2]Faculty of Materials Science and Chemistry,China University of Geosciences,Wuhan 430074,Hubei,China [3]Shenzhen Research Institute,China University of Geosciences,Shenzhen 518000,Guangdong,China [4]State Key Laboratory of New Textile Materials and Advanced Processing Technologies,Wuhan Textile University,Wuhan 430200,Hubei,China

出　　处：《Journal of Energy Chemistry》2024年第12期325-334,共10页能源化学（英文版）

基　　金：supported by the financial support from the National Natural Science Foundation of China (No. 22075256&No. 21975229&No. 12262011);the Hainan Provincial Science and Technology Special Found (No. ZDYF2022SHFZ299);the Natural Science Foundation of Guangdong Province (No.2024A1515012235);the Shenzhen Science and Technology Program (No. JCYJ20220530162403008)。

摘　　要：Developing efficient and stable electrocatalysts for the acidic oxygen evolution reaction (OER) is crucial yet challenging due to their sluggish kinetics and potential deactivation in harsh acidic environments.Herein,we propose an electronic regulation approach involving the incorporation of trace Pt into SrIrO_(3) perovskite to improve its activity and longevity for OER in acidic media.Both experimental and theoretical results reveal that trace Pt incorporation effectively regulates the electronic structure of SrIrO_(3),lowering the energy barrier of OER and mitigating the Ir overoxidation.The optimized 2%PtSrIrO_(3) electrocatalyst demonstrates an ultralow overpotential of 228 mV at 10 mA cm^(-2)and maintains stable over 50 h in 0.5 M H_(2)SO_(4),rivaling most reported iridate perovskites.As a demonstration,the 2%Pt-SrIrO_(3)||Pt/C based electrolytic cell exhibits high electrochemical performance and robustness for practical acidic water splitting.This protocol offers an attractive strategy for electronic structure manipulation in electrocatalysts towards electrocatalytic applications.

关 键 词：Oxygen evolution reaction Acidic media Strontium iridate Platinum incorporation Electronic structure 

分 类 号：TQ426[化学工程]