Durable Acidic Oxygen Evolution Via Self‑Construction of Iridium Oxide/Iridium‑Tantalum Oxide Bi‑Layer Nanostructure with Dynamic Replenishment of Active Sites  

作　　者：Qi Guo Rui Li Yanan Zhang Qiqin Zhang Yi He Zhibin Li Weihong Liu Xiongjun Liu Zhaoping Lu 

机构地区：[1]Institute of Clean Energy,Yangtze River Delta Research Institute,Northwestern Polytechnical University,Xi’an 710072,People’s Republic of China [2]Beijing Advanced Innovation Center for Materials Genome Engineering,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,People’s Republic of China [3]School of Materials Science and Engineering,Harbin Institute of Technology Shenzhen,Shenzhen 518055,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第7期270-284,共15页纳微快报(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52101202,52071024);the Funds for Creative Research Groups of China(No.51921001);the National Key Research and Development Program of China(No.2022YFB3707103);the Gusu Leading Talents Program(No.ZXL2021206);the Basic Research Program of Taicang(No.TC2023JC29);the Fundamental Research Fund for the Central Universities of China,GuangDong Basic and Applied Basic Research Foundation,and State Key Lab for Advanced Metals and Materials(No.2024-Z11).

摘　　要：Proton exchange membrane(PEM)water electrolysis presents considerable advantages in green hydrogen production.Nevertheless,oxygen evolution reaction(OER)catalysts in PEM water electrolysis currently encounter several pressing challenges,including high noble metal loading,low mass activity,and inadequate durability,which impede their practical application and commercialization.Here we report a self-constructed layered catalyst for acidic OER by directly using an Ir–Ta-based metallic glass as the matrix,featuring a nanoporous IrO_(2) surface formed in situ on the amorphous IrTaO_(x) nanostructure during OER.This distinctive architecture significantly enhances the accessibility and utilization of Ir,achieving a high mass activity of 1.06 A mg_(Ir)^(−1) at a 300 mV overpotential,13.6 and 31.2 times greater than commercial Ir/C and IrO_(2),respectively.The catalyst also exhibits superb stability under industrial-relevant current densities in acid,indicating its potential for practical uses.Our analyses reveal that the coordinated nature of the surface-active Ir species is effectively modulated through electronic interaction between Ir and Ta,preventing them from rapidly evolving into high valence states and suppressing the lattice oxygen participation.Furthermore,the underlying IrTaO_(x) dynamically replenishes the depletion of surface-active sites through inward crystallization and selective dissolution,thereby ensuring the catalyst’s long-term durability.

关 键 词：SELF-CONSTRUCTION NANOPOROUS Electronic interaction REPLENISHMENT Proton exchange membrane(PEM)water electrolysis 

分 类 号：O643.36[理学—物理化学]