文献类型：期刊文献

英文题名：Titanium Oxynitride-Supported Iridium Electrocatalysts for Efficient and Durable Acidic Oxygen Evolution Reaction

作者：Guo, Jian Wei[1];Lin, Hao Yang[1];Wang, Huan[1];Mao, Fang Xin[1];Yang, Shuang[1];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

年份：2025

卷号：20

期号：20

外文期刊名：CHEMISTRY-AN ASIAN JOURNAL

收录：;EI(收录号：20253619094386);WOS:【SCI-EXPANDED(收录号:WOS:001559208000001)】；

基金：This work was financially supported by the Shanghai Pilot Program for Basic Research (22TQ1400100-12), and the Fundamental Research Funds for the Central Universities. The authors thank the Frontiers Science Center for Materiobiology and Dynamic Chemistry and the National Synchrotron Radiation Laboratory (NSRL). The authors also thank the Shanghai Synchrotron Radiation Facility of BL14B1 (https://cstr.cn/31124.02.SSRF.BL14W1)for providing technical support and assistance in XAFS datacollection.

语种：英文

外文关键词：Iridium-based materials; Oxygen evolution reaction; Supports; Titanium oxynitride; Water splitting

摘要：Iridium-based materials are state-of-the-art electrocatalysts for the acidic oxygen evolution reaction (OER). In this work, an efficient low-iridium electrocatalyst is successfully anchored on a typical titanium oxynitride support, achieving an overpotential as low as 278 mV and robust stability over 1000 h at 10 mA cm-2 in 0.5 M H2SO4. It is discovered that high valence Ir(VI) sites can be in situ formed under the interaction of support during OER procedure, accounting for the superior performance. We show that rational design of support can realize activity and stability enhancement, demonstrating a feasible approach for acidic OER electrocatalysts.