文献类型：期刊文献

中文题名：Modulating Ru-O bond covalency via Ga-doping for enhanced oxygen evolution reaction in acid

作者：Zhongliang Liu[1];Heng Liu[3];Kai Zhou[1];Miaomiao Liu[4];Tianrui Xue[1];Yongjun Shen[1];Hao Li[3];Huihui Li[1];Chunzhong Li[1,2]

机构：[1]Key Laboratory for Ultrafine Materials of Ministry of Education,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;[2]Shanghai Engineering Research Center of Hierarchical Nanomaterials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;[3]Advanced Institute for Materials Research(WPI-AIMR),Tohoku University,Sendai 980-8577,Japan;[4]Key Laboratory of Interfacial Physics and Technology,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China

年份：2025

卷号：68

期号：11

起止页码：5606

中文期刊名：Science China Chemistry

外文期刊名：中国科学(化学英文版)

基金：supported by the National Natural Science Foundation of China(U22B20143,U24A20546,22478121);the Shanghai Municipal Science and Technology Major Project;the Science and Technology Commission of Shanghai Municipality(22dz1205900);the Fundamental Research Funds for the Central Universities(JKD01241702);the Japan Society for the Promotion of Science(JSPS)KAKENHI(JP23K13703,JP24K23069);the Ensemble Grants for Early Career Researchers 2024;Strategic Priority Research Program of the Chinese Academy of Sciences(XDA 0400000)。

语种：英文

中文关键词：oxygen evolution reaction;metal-oxygen covalency;proton exchange membrane water electrolysis;water oxidation

摘要：The increasing demand for green hydrogen production requires the development of advanced ruthenium(Ru)-based oxide catalysts for the anodic oxygen evolution reaction(OER).Here,we report the development of a Ga-doped RuO_(2)catalyst(GaRuO_(2))that demonstrates enhanced OER performance attributed to modulated Ru-O bond covalency.The fully occupied 3d orbital of Ga stabilizes its oxidation state during OER,while its atomic radius,similar to Ru,helps maintain the initial crystal lattice structure upon doping.In-situ characterization,kinetic analysis and theoretical calculations reveal that the weakened Ru-O bond covalency lowers the energy barriers for *OH and *OOH formation,thus contributing to an enhanced OER performance.The resultant Ga-RuO_(2)achieves a current density of 10 mA cm^(-2) at a low overpotential of 203 mV and demonstrates durable operation for 500 h in acid.This work provides valuable insights into the electronic structure engineering of Ru-based catalysts for practical water electrolysis applications.