文献类型：期刊文献

英文题名：CeO2-Stabilized Ni4Mo Alloys as Robust Alkaline Hydrogen-Evolving Electrocatalysts for Anion Exchange Membrane Water Electrolysis

作者：Mo, Yao Ren[1];Mao, Fang Xin[1];Chen, Ya Ni[1];Yang, Du Xiao[1];Liu, Ji Kai[1];He, Jing Jing[2];Yuan, Hai Yang[1];Niu, Qiang[2];Liu, Peng Fei[1];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Key Lab Ultrafine Mat, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn,Minist Educ, Shanghai 200237, Peoples R China;[2]Inner Mongolia Erdos Elect Power & Met Grp Co Ltd, Natl Enterprise Technol Ctr, Ordos 016064, Inner Mongolia, Peoples R China

年份：2026

卷号：26

期号：23

起止页码：7786

外文期刊名：NANO LETTERS

收录：;EI(收录号：20262520935396);WOS:【SCI-EXPANDED(收录号:WOS:001787902600001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22239001 and 22379043), the Shanghai Pilot Program for Basic Research (22TQ1400100-12), the Science and Technology Commission of Shanghai Municipality (23520710700 and 25DZ3000301), and the Fundamental Research Funds for the Central Universities. The authors also thank the Shanghai Synchrotron Radiation Facility of BL14B1 (https://cstr.cn/31124.02.SSRF.BL 14W1) for the assistance on XAFS measurements 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：anion exchange membrane water electrolysis; hydrogenevolution reaction; Ni4Mo alloy; rare-earthelement; surface passivation

摘要：The ampere-level alkaline hydrogen evolution reaction (HER) requires catalysts that combine high activity with long-term stability, yet benchmark NiMo alloys suffer from severe Mo leaching during operation. Here, we report a surface passivation strategy using CeO2-stabilized Ni4Mo alloys on MoO2 (CeO2-Ni4Mo/MoO2) for robust alkaline HER. Experimental and theoretical results reveal that surface CeO2 suppresses hydroxide-induced Mo dissolution while maintaining the reduced state of Ni4Mo and promoting interfacial water dissociation, thereby accelerating HER kinetics and increasing stability. Our catalyst delivers 1.0 A cm(-2) at an overpotential of 165 mV and sustains hydrogen production for more than 3000 h with negligible decay. When used as the cathode in a platinum-group-metal-free AEM water electrolyzer, it achieves a value of 2.0 A cm(-2) at 1.68 V, surpassing the DOE 2026 AEM benchmark of 2.0 A cm(-2) at 1.8 V, and operates for 1200 h at 1.0 A cm(-2) with a low degradation rate of 42.8 mu V h(-1).