文献类型：期刊文献

英文题名：Synergistic Sr Activation and Cr Buffering Effect on RuO2 Electronic Structures for Enhancing the Acidic Oxygen Evolution Reaction

作者：Liu, Zhongliang[1];Liu, Heng[2];Xue, Tianrui[1];Zhou, Kai[1];Li, Congcong[1];Shen, Yongjun[1];Su, Xiaozhi[3];Wu, Zhen-Yu[4];Li, Hao[2];Li, Huihui[1];Li, Chunzhong[1,5]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Tohoku Univ, Adv Inst Mat Res WPI AIMR, Sendai 9808577, Japan;[3]Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China;[4]Southern Univ Sci & Technol, Inst Innovat Mat, Dept Chem, Guangdong Prov Key Lab Sustainable Biomimet Mat &, Shenzhen 518055, Peoples R China;[5]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：24

期号：35

起止页码：10899

外文期刊名：NANO LETTERS

收录：;EI(收录号：20243516965567);WOS:【SCI-EXPANDED(收录号:WOS:001300148500001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grants 21838003, 21771170, and 22008069), 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 Shanghai Rising-Star Program (20QA1402700), JSPS KAKENHI (JP23K13703), and the Iwatani Naoji Foundation to support the computational research of this work. The authors thank the Shanghai Synchrotron Radiation Facility (14W1, SSRF), Physical Science of USTC, Beamlines MCD-A and MCD-B (Soochow Beamline for Energy Material) at the National Synchrotron Radiation Laboratory (NSRL) in Hefei, China, and the Center for Computational Materials Science, Institute for Materials Research, Tohoku University for the use of MASAMUNE-IMR (Project 202212-SCKXX-0204) and the Institute for Solid State Physics (ISSP) at the University of Tokyo for the use of their supercomputers.

语种：英文

外文关键词：acidic water oxidation; electron buffer; bidirectionalelectron transfer; Ru oxidation state; overoxidation

摘要：The oxygen evolution reaction (OER) performance of ruthenium-based oxides strongly correlates with the electronic structures of Ru. However, the widely adopted monometal doping method unidirectionally regulates only the electronic structures, often failing to balance the activity and stability. Here, we propose an "elastic electron transfer" strategy to achieve bidirectional optimization of the electronic structures of Sr, Cr codoped RuO2 catalysts for acidic OER. The introduction of electron-withdrawing Sr intrinsically activates the Ru sites by increasing the oxidation state of Ru. Simultaneously, Cr acts as an electron buffer, donating electrons to Ru in the presence of Sr in the as-prepared catalysts and absorbing excess electrons from Sr leaching during the OER. Such a bidirectional regulation feature of Cr prevents overoxidation of Ru and maintains its high oxidation state during the OER. The optimal Ru3Cr1Sr0.175 catalyst exhibits a low overpotential (214 mV @ 10 mA cm(-2)) and excellent stability (over 300 h).