文献类型：期刊文献

英文题名：Cation-Vacancy Induced Compressive Strain Localization in RuO2 Catalyst for High-Performance Acidic Oxygen Evolution

作者：Xue, Tianrui[1];Liu, Zhongliang[1];Song, Yiting[1];Liu, Miaomiao[2];Zhang, Jian[1];Zhou, Kai[1];Shen, Yongjun[1];Mao, Xiaoqing[1];Su, Xiaozhi[3];Li, Huihui[1];Li, Chunzhong[1,4]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China;[3]Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil, Shanghai 201210, Peoples R China;[4]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：65

期号：12

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20260620042496);WOS:【SCI-EXPANDED(收录号:WOS:001682089700001)】；

基金：This work was supported by the National Natural Science Foundation of China (U22B20143, U24A20546, 22522809, 22478121), the Shanghai Municipal Science and Technology Major Project, and the Science and Technology Commission of Shanghai Municipality (22dz1205900). The authors thank the Shanghai Synchrotron Radiation Facility of BL14W1 (https://cstr.cn/31124.02.SSRF.BL14W1) for the assistance on XAFS measurements.

语种：英文

外文关键词：Acidic oxygen evolution reaction; Cation vacancy; Compressive strain; Proton exchange membrane water electrolysis; RuO2 catalyst

摘要：Designing acid-stable RuO2 catalysts capable of overcoming the activity-stability trade-off remains pivotal for advancing proton exchange membrane water electrolyzers (PEMWEs). Here, we introduce a cation-vacancy engineering strategy to generate localized compressive strain in RuO2 by electrochemically leaching Cd from a pre-doped lattice. This strain modulation simultaneously elevates the Ru valence state (+4.35) and strengthens Ru & horbar;O covalent bonds, optimizing *OH/*O/*OOH adsorption energetics while suppressing over-oxidation. The resulting V-Cd-RuO2 catalyst achieves an overpotential of 203 mV at 10 mA cm(-2) in 0.1 M HClO4. Integrated into a PEMWE, it sustains >600 h operation at 200 mA cm(-2) with a voltage degradation rate of 0.1 mV h(-1). The MEA based on V-Cd-RuO2 required cell voltages outperformed commercial RuO2 by 120-180 mV at industrially relevant current densities (0.5-1.5 A cm(-2)), thereby demonstrating significant energy efficiency. Multiscale analyses confirm that compressive strain stabilizes high-valence Ru sites through enhanced orbital overlap, reconciling catalytic activity with structural durability. This work establishes vacancy-driven strain engineering as a universal approach for designing robust, Ir-free OER electrocatalysts.