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Issue 98, 2019
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Carbon nanotube-encapsulated cobalt for oxygen reduction: integration of space confinement and N-doping

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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.

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

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Publication details

The article was received on 29 Oct 2019, accepted on 14 Nov 2019 and first published on 14 Nov 2019


Article type: Communication
DOI: 10.1039/C9CC08439H
Chem. Commun., 2019,55, 14801-14804

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

    Q. Wang, K. Ye, L. Xu, W. Hu, Y. Lei, Y. Zhang, Y. Chen, K. Zhou, J. Jiang, J. M. Basset, D. Wang and Y. Li, Chem. Commun., 2019, 55, 14801
    DOI: 10.1039/C9CC08439H

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