Pyrolysis-free formamide-derived N-doped carbon supporting atomically dispersed cobalt as high-performance bifunctional oxygen electrocatalyst  

作　　者：Yin Jia Yiyan Wang Guoxin Zhang Cong Zhang Kai Sun Xuya Xiong Junfeng Liu Xiaoming Sun 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering,College of Science,Beijing University of Chemical Technology,Beijing 100029,China [2]College of Electrical Engineering and Automation,Shandong University of Science and Technology,Qingdao 266590,Shandong,China [3]State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao 266580,Shandong,China

出　　处：《Journal of Energy Chemistry》2020年第10期283-290,共8页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(NSFC,21520102002,91622116,and 21701101);the National Key Research and Development Project(2016YFF0204402);the Fundamental Research Funds for the Central Universities;the Long-Term Subsidy Mechanism from the Ministry of Finance and the Ministry of Education of China;the Shandong Scientific Research Awards Foundation for Outstanding Young Scientists(ZR2018JL010)。

摘　　要：Non-precious metal-nitrogen-carbon(MNC)electrocatalysts have gained tremendous attention as promising electrocatalysts for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).However,the most applicable strategies for the synthesis of MNC materials heavily rely on pyrolysis treatment,which may easily lead to metal aggregation and subsequent degradation of catalytic performance.Herein,we developed a pyrolysis-free strategy for preparing MNC materials,which was demonstrated by achieving ultrathin cobalt-nitrogen-carbon(Co NC)layer with dense atomically dispersed cobalt sites depositing on graphene oxide(GO)via simple treatment of Co salt and GO in formamide.The formamide-derived Co NC layer deposited on GO(termed as f-Co NC/GO)could be controlled in 1-2 nm thick.Remarkably,the f-CoNC/GO composite without pyrolysis exhibited excellent bifunctional performance toward ORR and OER,which was attributed to the dense atomically dispersed Co-Nxsites and improved conductivity by GO substrate.Furthermore,the f-CoNC/GO-assembled rechargeable Zn-air battery showed highly efficient and stable performance,demonstrating our pyrolysis-free method to be straightforward,cost-effective,and feasible for the scalable production of MNC electrocatalysts.

关 键 词：Pyrolysis-free FORMAMIDE Non-precious metal Electrocatalysts Zn-air battery 

分 类 号：O643.36[理学—物理化学]