文献类型：期刊文献

英文题名：Leaching-Induced Ti Trapping Stabilizes Amorphous IrOx for Proton Exchange Membrane Water Electrolysis

作者：Lin, Hao Yang[1];Li, Wen Jing[1];Lin, Miao Yu[1];Xu, Hao Guan[1];Fang, Song Ru[1];Lv, Yao[2,3];Li, Wenbo[2,3];Guo, Jianwei[1];Fu, Huai Qin[4];Yuan, Hai Yang[1];Sun, Chenghua[5];Dai, Sheng[2,3];Liu, Peng Fei[1];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Sch Chem & Mol Engn, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[4]Griffith Univ, Ctr Catalysis & Clean Energy, Gold Coast Campus, Gold Coast, Qld 4222, Australia;[5]Swinburne Univ Technol, Dept Chem & Biotechnol, Fac Sci Engn & Technol, Hawthorn 3122, Australia

年份：2025

卷号：64

期号：26

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20251818334401);WOS:【SCI-EXPANDED(收录号:WOS:001477031200001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22239001, 51920105003, 22376062, and 22379043), the Shanghai Pilot Program for Basic Research (22TQ1400100-12), the Science and Technology Commission of Shanghai Municipality (23520710700 and 22ZR1415700), and the Fundamental Research Funds for the Central Universities. The authors thank the Frontiers Science Center for Materiobiology and Dynamic Chemistry and National Synchrotron Radiation Laboratory (NSRL). The authors also thank the Shanghai Synchrotron Radiation Facility of BL14B1 ( 14W1) for the assistance on XAFS measurements and the 1W1B- XAFS Beamline of Beijing Synchrotron Radiation Facility (. 1W1B) for providing technical support and assistance in XAFS data collection. The authors also thank Shanghai Aitins Technology Co., Ltd. for their support and assistance in first-principles calculations.

语种：英文

外文关键词：Amorphous catalysts; Metal nitrides; Oxygen evolution reaction; Proton exchange membrane water electrolysis; Stabilization

摘要：Transition metal nitrides are promising conductive support materials in oxygen evolution reaction (OER), whereas it is unclear if their electrochemical oxidation during prolonged test would affect the OER catalysts. Herein, we demonstrate that the leaching-induced Ti trapping effect from TiN supports effectively stabilizes the electrochemically oxidized amorphous IrOx catalyst. Structural characterizations reveal that the TiN support experiences severe leaching during OER test, leaving minor amounts of Ti-O species trapping on IrOx clusters, which mitigate the overoxidation of Ir(III) species and elongate the Ir-O bonds. This leads to 70% reduction of lattice oxygen oxidation and the substantially reduced Ir leaching. Additionally, self-thickening of the catalyst layers is found during proton exchange membrane water electrolysis (PEMWE), enabling an ultralow catalyst loading of 87 mu gIr cm-2 to obtain a stable operation at 1.0 A cm-2 for 500 h. This work deepens the understanding of TiN-supported catalysts for long-term stable OER electrocatalysis.