Immobilization of Oxyanions on the Reconstructed Heterostructure Evolved from a Bimetallic Oxysulfide for the Promotion of Oxygen Evolution Reaction  

作　　者：Kai Yu Hongyuan Yang Hao Zhang Hui Huang Zhaowu Wang Zhenhui Kang Yang Liu Prashanth W.Menezes Ziliang Chen 

机构地区：[1]Institute of Functional Nano and Soft Materials(FUNSOM),Jiangsu Key Laboratory for Carbon‑Based Functional Materials and Devices,Joint International Research Laboratory of Carbon‑Based Functional Materials and Devices,Soochow University,Suzhou 215123,People’s Republic of China [2]Department of Chemistry:Metalorganics and Inorganic Materials,Technical University of Berlin,Strase Des 17 Juni 135.Sekr.C2,10623 Berlin,Germany [3]Materials Chemistry Group for Thin Film Catalysis–CatLab,Helmholtz-Zentrum Berlin fur Materialien und Energie,Albert‑Einstein‑Str.15,12489 Berlin,Germany [4]School of Physics and Engineering,Longmen Laboratory,Henan University of Science and Technology,Luoyang 471023,People’s Republic of China

出　　处：《Nano-Micro Letters》2023年第10期547-564,共18页纳微快报（英文版）

基　　金：supported by National MCF Energy R&D Program of China(2018YFE0306105);National Key R&D Program of China(2020YFA0406104,2020YFA0406101);Innovative Research Group Project of the National Natural Science Foundation of China(51821002);National Natural Science Foundation of China(52201269,51725204,21771132,51972216,52041202);Natural Science Foundation of Jiangsu Province(BK20210735);Natural Science Foundation of the Higher Education Institutions of Jiangsu Province(21KJB430043);Collaborative Innovation Center of Suzhou Nano Science&Technology;the 111 Project;Suzhou Key Laboratory of Functional Nano&Soft Materials;Jiangsu Key Laboratory for Advanced Negative Carbon Technologies;the funding from Alexander von Humboldt(AvH)Foundation;Gusu leading talent plan for scientific and technological innovation and entrepreneurship(ZXL2022487);support from the German Federal Ministry of Education and Research in the framework of the project Catlab(03EW0015A/B)。

摘　　要：Efficient and durable oxygen evolution reaction(OER)requires the electrocatalyst to bear abundant active sites,optimized electronic structure as well as robust component and mechanical stability.Herein,a bimetallic lanthanum-nickel oxysulfide with rich oxygen vacancies based on the La_(2)O_(2)S prototype is fabricated as a binder-free precatalyst for alkaline OER.The combination of advanced in situ and ex situ characterizations with theoretical calculation uncovers the synergistic effect among La,Ni,O,and S species during OER,which assures the adsorption and stabilization of the oxyanion SO_(4)^(2-)onto the surface of the deeply reconstructed porous heterostructure composed of confining Ni OOH nanodomains by La(OH)_3 barrier.Such coupling,confinement,porosity and immobilization enable notable improvement in active site accessibility,phase stability,mass diffusion capability and the intrinsic Gibbs free energy of oxygen-containing intermediates.The optimized electrocatalyst delivers exceptional alkaline OER activity and durability,outperforming most of the Ni-based benchmark OER electrocatalysts.

关 键 词：Lanthanum-nickel oxysulfide Rare earth metal Immobilization of oxyanions Structural reconstruction Oxygen evolution catalysis 

分 类 号：O643.36[理学—物理化学]