Probing trace Pt incorporated SrIrO3 perovskite for efficient and stable acidic water oxidation

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外文摘要：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 SrIrO3 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 SrIrO3,lowering the energy barrier of OER and mitigating the Ir overoxidation.The optimized 2％Pt-SrIrO3 electrocatalyst demonstrates an ultralow overpotential of 228 mV at 10 mA cm-2 and maintains stable over 50 h in 0.5 M H2SO4,rivaling most reported iridate perovskites.As a demonstration,the 2％Pt-SrIrO3||Pt/C based electrolytic cell exhibits high electrochemical performance and robustness for prac-tical acidic water splitting.This protocol offers an attractive strategy for electronic structure manipula-tion in electrocatalysts towards electrocatalytic applications.

外文关键词：

Oxygen evolution reactionAcidic mediaStrontium iridatePlatinum incorporationElectronic structure

作者：

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

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作者单位：

School of Marine Science and Engineering,Hainan University,Haikou 570228,Hainan,China

Faculty of Materials Science and Chemistry,China University of Geosciences,Wuhan 430074,Hubei,China

Shenzhen Research Institute,China University of Geosciences,Shenzhen 518000,Guangdong,China

State Key Laboratory of New Textile Materials and Advanced Processing Technologies,Wuhan Textile University,Wuhan 430200,Hubei,China

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出版年：

2024

DOI：

10.1016/j.jechem.2024.07.056

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.99(12)