文献类型：期刊文献

英文题名：Inducing oxygen deficiencies through amorphization in IrMoOx: A pathway to highly efficient acidicwater oxidation and water splitting

作者：Li, Xiang[1,2];Wang, Zhiqiang[1,2];Li, Hui[1,2];Wu, Fengchi[4];Li, Dongzhi[1,2];Su, Zixiang[1,2];Zhang, Longtao[1,2];Jiao, Shanyan[1,2];Wei, Hehe[1,2];Gong, Xue-Qing[3]

机构：[1]East China Univ Sci & Technol, Ctr Computat Chem, Sch Chem & Mol Engn, State Key Lab Green Chem Engn & Ind Catalysis, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China;[4]Guangdong Polytech Normal Univ, Sch Innovat & Entrepreneurship, Guangzhou 510665, Peoples R China

年份：2025

卷号：136

起止页码：573

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20252018414651);WOS:【SCI-EXPANDED(收录号:WOS:001491307700001)】；

基金：This work was supported by National Key R & D Program of China (2021YFA1500700, 2018YFA0208602) , National Natural Science Foundation of China (22203030, 22102057, 21825301, 92045303) and Shanghai Sailing Program (21YF1409400) . F.W. acknowledges the support by Science and Technology Projects in Guangzhou (2023A04J1382) . The authors thank Research Center of Analysis and Test of East China University of Science and Technology for the char-acterizations and Feringa Nobel Prize Scientist Joint Research Center. We also thank Shiyanjia Lab ( www.shiyanjia.com ) for the support of drawing schematic illustration.

语种：英文

外文关键词：Amorphous structure; Oxygen defect; Active metal species; Oxygen evolution reaction; Water electrolysis

摘要：Despite the considerable potential of acidic proton exchange membrane water electrolyzers (PEMWEs) for costefficient hydrogen production, their acidic oxygen evolution reaction (OER) kinetics are dramatically more sluggish than that in alkaline, causing inferior activity and stability. Herein, we successfully synthesize the amorphous IrMoOx catalyst, featuring disordered structure, oxygen deficiencies and an increased oxidation state of Ir species compared with commercial IrO2. The amorphous IrMoOx catalyst demonstrates exceptional bifunctional catalytic activities and durability in both hydrogen evolution reaction (HER) and OER in acid, accompanied with the ultralow overpotentials (29 and 235 mV) for the 10 mA cm-2, respectively. Theoretical calculations reveal the existence of special IrO4 planar structure within the amorphous IrMoOx and illustrate that the introduced Mo and rich oxygen vacancies optimize d-band of metal species, thereby tuning rate-determining step and enhancing OER performances compared with commercial IrO2. Furthermore, the IrMoOx ||IrMoOx catalyst delivers the current density of 10 mV cm-2 at ultralow voltage of 1.55 V, outperforming the commercial Pt/C ||IrO2(1.76 V).