Mn,N co-doped Co nanoparticles/porous carbon as air cathode for highly efficient rechargeable Zn-air batteries Hide Author's Information  

作　　者：Hanzhen Zheng Fei Ma Hongcen Yang Xiaogang Wu Rui Wang Dali Jia Zhixia Wang Niandi Lu Fen Ran Shanglong Peng 

机构地区：[1]National&Local Joint Engineering Laboratory for Optical Conversion Materials and Technology,School of Physical Science and Technology,Lanzhou University,Lanzhou 730000,China [2]State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,School of Material Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China

出　　处：《Nano Research》2022年第3期1942-1948,共7页纳米研究（英文版）

基　　金：the Gansu Provincial Natural Science Foundation of China(No.17JR5RA198);the Fundamental Research Funds for the Central Universities(Nos.lzujbky-2018-119,lzujbky-2018-ct08,and lzujbky-2019-it23);Key Areas Scientific and Technological Research Projects in Xinjiang Production and Construction Corps(No.2018AB004);the National Natural Science Foundation of China(No.11975114);Cooperation project of Gansu Academy of Sciences(No.2020HZ-2);the fund of State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals(No.SKLAB02019001);Cooperation project of Gansu Academy of Sciences(No.2020HZ-2).

摘　　要：Oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)are generally catalyzed by precious metals(Pt)and metal oxides(IrO_(2))which still have many shortages including expensive price,poor selectivity and undesirable stability.In this work,we report a Mn0-doped CoN_(x) on N-doped porous carbon(Mn-CoN_(x)/N-PC)composite from carbonizing metal-organic framework(MOF)derivative as the dual-functional catalyst to boost both the ORR and OER performances.Owing to the strong coordination effect between nitrogen and metal elements,the introduction of N can obviously improve the content of Co-N-C active sites for ORR.Meanwhile,the Mn-doping significantly regulates the electronic structure of the Co element and increases the content of Co^(0) which provide efficient OER active sites.Mn-CoN_(x)/N-PC catalyst delivers super dual-functional activity with a half-wave potential of 0.85 V,better than the 20%Pt/C catalyst(0.82 V).When used in Zn-air batteries for testing,Mn-CoN_(x)/N-PC electrocatalyst shows a high power density(145 mW·cm^(−2))and good cycle performance.

关 键 词：bifunctional electrocatalysts Co-N-C MN-DOPED Zn-air batteries 

分 类 号：O64[理学—物理化学]