Oxygen vacancy-rich amorphous FeNi hydroxide nanoclusters as an efficient electrocatalyst for water oxidation  

作　　者：Youhai Cao Yang Su Liangliang Xu Xiaohua Yang Zhongkang Han Rui Cao Gao Li 

机构地区：[1]State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China [2]Institute of Quantum and Sustainable Technology(IQST),School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China [3]Multidisciplinary Computational Laboratory,Department of Electrical and Biomedical Engineering,Hanyang University,Seoul 04763,South Korea [4]Center for Energy Science and Technology,Skolkovo Institute of Science and Technology,Skolkovo Innovation Center,Moscow 143026,Russia [5]Stanford Synchrotron Radiation Lightsource,SLAC National Accelerator Laboratory,Menlo Park,CA 94025,USA

出　　处：《Journal of Energy Chemistry》2022年第8期167-173,I0005,共8页能源化学（英文版）

基　　金：the financial support by the Natural Science Foundation of China(22172167);the Senior Talent Startup Funds of Jiangsu University(4111310024)。

摘　　要：In this work,a one-pot strategy is presented to directly synthesize amorphous Fe_(x)Ni_(y) hydroxide nanoclusters(denoted as ANC-Fe_(x)Ni_(y),<2 nm)with oxygen vacancies induced by ionic liquids.The ANC-Fe_(x)Ni_(y) catalyst presents abundant catalytic sites and high intrinsic conductivity.As such,the optimized ANC-Fe_(1)Ni_(2) exhibits high activity in oxygen evolution reaction(OER)with a Tafel slope of 39 m V dec^(–1) and an overpotential of 266 m V at 10 m A cm^(-2).Notably,the optimized ANC-Fe_(1)Ni_(2) shows an extraordinarily large mass activity of 3028 Ag_(FeNi)^(–1) at the overpotential of 300 m V,which is~24-fold of commercial RuO_(2) catalyst.The superior activity of these Fe_(x)Ni_(y) hydroxide nanoclusters is ascribed to(i)the amorphous and distorted structure with abundant oxygen vacancies,and(ii)enhanced active site density by downsizing the ANC-FexNiyclusters.This strategy provides a novel route for enhancing OER electrocatalytic performance and highly encouraging for the future application of amorphous metal hydroxides in catalysis.

关 键 词：Oxygen evolution reaction HYDROXIDES Amorphous Ni-Fe based nanoclusters Ionic liquids Oxygen vacancies 

分 类 号：O643.36[理学—物理化学]