文献类型：期刊文献

英文题名：Tetragonal ZrO2 supported low-iridium catalyst activating oxygen spillover stabilized lattice oxygen for proton exchange membrane water electrolysis

作者：Fang, Song Ru[1];Yang, Hai Xiang[1];Lin, Hao Yang[1];Lin, Miao Yu[1];Mao, Fang Xin[1];Fan, Hao[1];Fu, Huai Qin[2];Yuan, Hai Yang[1];Sun, Chenghua[3];Liu, Peng Fei[1];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Griffith Univ, Ctr Catalysis & Clean Energy, Gold Coast Campus, Gold Coast, Qld 4222, Australia;[3]Swinburne Univ Technol, Ctr Translat Atomaterials, Dept Chem & Biotechnol, Hawthorn, Vic 3122, Australia

年份：2025

卷号：18

期号：11

起止页码：5470

外文期刊名：ENERGY & ENVIRONMENTAL SCIENCE

收录：;EI(收录号：20252018424917);WOS:【SCI-EXPANDED(收录号:WOS:001483727400001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22239001, 22379043 and 22472053), the Shanghai Pilot Program for Basic Research (22TQ1400100-12), the Science and Technology Commission of Shanghai Municipality (23520710700), and the Fundamental Research Funds for the Central Universities. The authors would like to thank Shanghai Aitins Technology Co., Ltd. for their professional support and assistance in first-principles calculations. The authors also thank the Frontiers Science Center for Materiobiology and Dynamic Chemistry, and the 1W1B- XAFS Beamline of Beijing Synchrotron Radiation Facility (https://cstr.cn/31109.02.BSRF.1W1B) for providing technical support and assistance in XAFS data collection.

语种：英文

外文关键词：Electrochemical oxidation - Reaction intermediates - Redox reactions

摘要：Mediating the trade-off between activity and durability at a low Ir loading is challenging for the acidic oxygen evolution reaction (OER) in proton exchange membrane (PEM) water electrolysis. Herein, we construct an efficient and stable low-iridium loaded anode electrocatalyst supported on porous tetragonal zirconium oxide (IrOx/t-ZrO2) that exhibits a high mass activity of 1464.6 A gIr-1 at 1.6 V and can operate stably at 10 mA cm-2 for more than 1000 h in acidic electrolyte without any degradation. Structural characterization studies, electrochemical analyses and theoretical calculations reveal active lattice oxygen redox over a supported IrOx nanocluster, stabilized by oxygen spillover from the t-ZrO2 substrate during the OER process. This oxygen spillover engaged lattice oxygen oxidation pathway can not only boast OER kinetics via avoiding scaling relationships between oxygen intermediates, but also prevent the collapse of IrOx by the prompt recovery of migrated oxygen species. A PEM electrolyzer using IrOx/t-ZrO2 as the anode material, with a significantly low Ir loading of 0.1 mgIr cm-2, demonstrates 3.10 A cm-2 at only 1.9 V, and low activity decay (6.25 mu V h-1) during a 1600 h test at 1 A cm-2.