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

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...

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Veröffentlicht in:Nano research 2021-04, Vol.14 (4), p.998-1003
Hauptverfasser: Wu, Wenjie, Liu, Yan, Liu, Dong, Chen, Wenxing, Song, Zhaoyi, Wang, Ximin, Zheng, Yamin, Lu, Ning, Wang, Chunxia, Mao, Junjie, Li, Yadong
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container_end_page 1003
container_issue 4
container_start_page 998
container_title Nano research
container_volume 14
creator Wu, Wenjie
Liu, Yan
Liu, Dong
Chen, Wenxing
Song, Zhaoyi
Wang, Ximin
Zheng, Yamin
Lu, Ning
Wang, Chunxia
Mao, Junjie
Li, Yadong
description 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 Cui/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.
doi_str_mv 10.1007/s12274-020-3141-x
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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 Cui/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. 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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. 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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 Cui/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.</abstract><cop>Beijing</cop><pub>Tsinghua University Press</pub><doi>10.1007/s12274-020-3141-x</doi><tpages>6</tpages></addata></record>
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identifier ISSN: 1998-0124
ispartof Nano research, 2021-04, Vol.14 (4), p.998-1003
issn 1998-0124
1998-0000
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source SpringerNature Journals
subjects Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Carbon
Catalysts
Chemical reduction
Chemistry and Materials Science
Condensed Matter Physics
Copper
Electrocatalysts
Electrochemistry
Energy conversion
Materials Science
Metal air batteries
Nanoparticles
Nanotechnology
Noble metals
Oxygen
Oxygen reduction reactions
Platinum
Pyrolysis
Research Article
Stability
Synergistic effect
Zinc-oxygen batteries
title Single copper sites dispersed on hierarchically porous carbon for improving oxygen reduction reaction towards zinc-air battery
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