Carbon nanotube-encapsulated cobalt for oxygen reduction: integration of space confinement and N-doping

Qichen Wang; Ke Ye; Liang Xu; Wei Hu; Yongpeng Lei; Yi Zhang; Yin Chen; Kechao Zhou; Jun Jiang; Jean M. Basset; Dingsheng Wang; Yadong Li

doi:10.1039/C9CC08439H

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Carbon nanotube-encapsulated cobalt for oxygen reduction: integration of space confinement and N-doping

Journal article

Peer reviewed

Carbon nanotube-encapsulated cobalt for oxygen reduction: integration of space confinement and N-doping

Qichen Wang, Ke Ye, Liang Xu, Wei Hu, Yongpeng Lei, Yi Zhang, Yin Chen, Kechao Zhou, Jun Jiang, Jean M. Basset, …

Chemical communications (Cambridge, England), Vol.55(98), pp.14801-14804

05/12/2019

DOI: https://doi.org/10.1039/C9CC08439H

PMID: 31761910

Abstract

We report carbon nanotube-encapsulated cobalt as an efficient oxygen reduction electrocatalyst (onset potential of 0.94 V and half-potential of 0.84 V). Calculation results firstly reveal that Co protected by graphitic-N-doped carbon holds more negative charge (−1.22 eV) and has an energy barrier (0.56 eV) lower than that of pyridinic-N-doped carbon (−1.11 eV; 0.78 eV), which is responsible for the ORR activity. The corresponding Zn–air batteries deliver an excellent gravimetric energy density of 837 W h kg −1 .

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Title: Carbon nanotube-encapsulated cobalt for oxygen reduction: integration of space confinement and N-doping
Creators - without role: Qichen Wang - Central South University
Ke Ye - Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, CAS Center for Excellence in Nanoscience, School of Chemistry and Materials Science, University of Science and Technology of China
Liang Xu - Jiangxi University of Science and Technology
Wei Hu - National University of Defense Technology
Yongpeng Lei - Central South University
Yi Zhang - Central South University
Yin Chen - Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, P. R. China
Kechao Zhou - Central South University
Jun Jiang - University of Science and Technology of China
Jean M. Basset - King Abdullah University of Science and Technology
Dingsheng Wang - Tsinghua University
Yadong Li - Tsinghua University
Publication Details: Chemical communications (Cambridge, England), Vol.55(98), pp.14801-14804
Identifiers: 9941904508331
Academic Unit: King Abdullah University of Science & Technology
Language: English
Resource Type: Journal article