A comparison study on single metal atoms(Fe,Co,Ni)within nitrogen-doped graphene for oxygen electrocatalysis and rechargeable Zn-air batteries

作     者：Shuai Xie Hongchang Jin Chao Wang Huanyu Xie Ying-Rui Lu Ting-Shan Chan Wensheng Yan Song Jin Hengxing Ji Shuai Xie;Hongchang Jin;Chao Wang;Huanyu Xie;Ying-Rui Lu;Ting-Shan Chan;Wensheng Yan;Song Jin;Hengxing Ji

作者机构：School of Chemistry and Material SciencesCAS Key Laboratory of Materials for Energy ConversionUniversity of Science and Technology of ChinaHefei 230026China National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei 230026China National Synchrotron Radiation Research Center300 HsinchuTaiwanChina 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2023年第34卷第6期

页      面：531-536页

核心收录：

学科分类：0808[工学-电气工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：funding support from the National Natural Science Foundation of China(Nos.U2032202,22125902 and 21975243) DNL cooperation Fund,CAS(No.DNL202020) Fundamental Research Funds for the Central Universities(Nos.WK2060000013 and YD3430002001) Users with Excellence Program of Hefei Science Center CAS(No.2021HSC-UE002) 

主　　题：M-N@C catalysts Oxygen reduction reaction Oxygen evolution reaction Single atom catalysts Zn-air batteries 

摘      要：Single atom catalysts(SACs)with atomically dispersed transition metals on nitrogen-doped carbon supports have recently emerged as highly active non-noble metal electrocatalysts for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER),showing great application potential in Zn-air ***,because of the complex structure-performance relationships of carbon-based SACs in the oxygen electrocatalytic reactions,the contribution of different metal atoms to the catalytic activity of SACs in Zn-air batteries still remains *** this study,SACs with atomically dispersed transition metals on nitrogen-doped graphene sheets(M-N@Gs,M=Co,Fe and Ni),featured with similar physicochemical properties and M-N@C configurations,are *** comparing the on-set potentials and the maximum current,we observed that the ORR activity is in the order of Co-N@GFe-N@GNi-N@G,while the OER activity is in the order of Co-N@GNi-N@GFe-N@*** Zn-air batteries with Co-N@G as the air cathode catalysts outperform those with the Fe-N@G and Ni-N@*** is due to the accelerated charge transfer between Co-N@C active sites and the oxygen-containing *** study could improve our understanding of the design of more efficient bifunctional electrocatalysts for Zn-air batteries at the atomic level.