Preparation of Co/CoOx Derived from a Lowtemperature Etching of ZIF-67 for Oxygen Reduction and Oxygen Evolution Catalytic Reaction  

作　　者：TAN Shifeng TU Wenmao PAN Hongfei ZHANG Haining 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China [2]Hubei Key Laboratory of Fuel Cells,Wuhan University of Technology,Wuhan 430070,China [3]Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory,Foshan 528200,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第6期1255-1261,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded in part by the National Natural Science Foundation of China(No.22279096);the Guangdong Basic and Applied Basic Research Foundation(No.2021B1515120072);the Guangdong Key R&D Program(No.2020B0909040001)。

摘　　要：Catalysts consisting of Zeolite imidazolyl ester skeleton-67(ZIF-67)and graphene oxide(GO)were fabricated through a solvothermal method,followed by etching ZIF-67 with oxygen-rich functional groups on GO in a reduction atmosphere at 400℃.During this process,an open type of cobalt metal center was formed by the partial vaporization and oxidation of ZIF-67,further reducing to Co and partially combining with oxygen species to amorphous CoOx.Benefiting from the rich functional N,and metal/oxides active centers derived from the calcination process,the synthesized Co/CoOx@NSG-400 showed a low OER overpotential of 10 mA·cm^(-2) at 298 mV,and an ORR half-wave potential of 0.8 V,which demonstrated its excellent bifunctional catalytic activity.Such a controllable calcination strategy with high yields could be expected to pave the way for synthesizing low-cost and efficient bifunctional electrocatalysts.

关 键 词：oxygen evolution reaction oxygen reduction reaction bifunctional electrocatalyst ZIF-67 

分 类 号：TQ426[化学工程]