The reconstruction of equal-mole bimetal organic framework to heterostructure for effective oxygen evolution reaction  

作　　者：Jinxia Yang Zhaoxia Hu Youlei Feng Zehua Zou Xiaoping Chen Qingxiang Wang 

机构地区：[1]Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology,Fujian Provincial Key Laboratory of Pollution Monitoring and Control,College of Chemistry,Chemical Engineering and Environment,Minnan Normal University,Zhangzhou,363000,China

出　　处：《Journal of Materials Science & Technology》2024年第36期118-125,共8页材料科学技术(英文版)

基　　金：supported by Projects of the Natural Science Foundation of Fujian Province(No.2022J05170);the President’s Found of Minnan Normal University(Nos.KJ2021005,KJ2023002);the Natural Science Foundation of China(No.21275127);the High-level Incubation Program of Minnan Normal University(No.MSGJB2021003).

摘　　要：Oxygen evolution reaction(OER)is one of the most important issues for hydrogen production from water splitting.During the OER process,electrochemical reconstruction is widely observed for the majority of electrocatalysts,which is strongly related to the formation and evolution of real active species.Herein,bimetal metal-organic framework(MOF)with an equal ratio of Co and Fe sites is screened to exhibit the superior OER property.An obvious reconstruction is observed to transform single MOF phase into the heterostructure composed of active CoOOH and FeOOH.Meanwhile,the generation of Co^(3+)species is more reliant on the blessing of electricity and electrolyte than that of Fe3+species.As a result,the optimal electrocatalyst shows the overpotential of 267 mV at 10 mA/cm^(2)and ultra-low Tafel slope of 24.7 mV/dec with a stable OER performance.

关 键 词：Oxygen evolution reaction Metal-organic frameworks RECONSTRUCTION HETEROSTRUCTURE 

分 类 号：O64[理学—物理化学]