Single copper sites dispersed on hierarchically porous carbon for improving oxygen reduction reaction towards zinc-air battery

查看全文 作　　者：Wenjie [1]Wu;Yan [2]Liu;Dong [3]Liu;Wenxing [4]Chen;Zhaoyi [1]Song;Ximin [1]Wang;Yamin [2]Zheng;Ning [2]Lu;Chunxia [1]Wang;Junjie [2]Mao;Yadong [5]Li

机构地区：[1]State Key Laboratory of Heavy Oil Processing,College of New Energy and Materials,China University of Petroleum,Beijing 102249,China;[2]Key Laboratory of Functional Molecular Solids,Ministry of Education,Anhui Province Key Laboratory of Optoelectric Materials Science and Technology and Anhui Laboratory of Molecule-Based Materials,Anhui Normal University,Wuhu 241002,China;[3]State key Lab of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China;[4]Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications,School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;[5]Department of Chemistry,Tsinghua University,Beijing 100084,China

出　　处：《Nano Research》索引2021年第14卷第4期,共6页

基　　金：the National Natural Science Foundation of China(Nos.21804319,21971002);the Natural Science Foundation of Anhui province(Nos.1908085QB45 and 2008085QB81);the Education Departm ent of Anhui Province Foundation(No.KJ2019A0503).We thank the BL14W1 station in Shanghai Synchrotron Radiation Facility(SSRF)and 1W1B station for XAFS measurement in Beijing Synchrotron Radiation Facility(BSRF).The calculations in this paper have been done on the supercomputing system of the National Supercomputing Center in Changsha. 摘　　要：The demand for high-performance non-precious-metal electrocatalysts to replace the noble metal-based catalysts for oxygen reduction reaction(ORR)is intensively increasing.Herein,single-atomic copper sites supported on N-doped three-dimensional hierarchically porous carbon catalyst(Cu_(1)/NC)was prepared by coordination pyrolysis strategy.Remarkably,the Cu_(1)/NC-900 catalyst not only exhibits excellent ORR performance with a half-wave potential of 0.894 V(vs.RHE)in alkaline media,outperforming those of commercial Pt/C(0.851 V)and Cu nanoparticles anchored on N-doped porous carbon(CuNPs/NC-900),but also demonstrates high stability and methanol tolerance.Moreover,the Cu_(1)/NC-900 based Zn-air battery exhibits higher power density,rechargeability and cyclic stability than the one based on Pt/C.Both experimental and theoretical investigations demonstrated that the excellent performance of the as-obtained Cu_(1)/NC-900 could be attributed to the synergistic effect between copper coordinated by three N atoms active sites and the neighbouring carbon defect,resulting in elevated Cu d-band centers of Cu atoms and facilitating intermediate desorption for ORR process.This study may lead towards the development of highly efficient non-noble metal catalysts for applications in electrochemical energy conversion. 关键词：single atomic sites catalysts nitrogen-doped carbon materials oxygen reduction reaction carbon defect non-noble metal

相关文献

参考文献（41）
引证文献（11）
耦合文献（205）

参考文献(41)

引证文献(11)

耦合文献(205)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Single copper sites dispersed on hierarchically porous carbon for improving oxygen reduction reaction towards zinc-air battery

参考文献(41)

引证文献(11)

耦合文献(205)

用户提示