Issue 98, 2019

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

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

Supplementary files

Article information

Article type
Communication
Submitted
29 Oct 2019
Accepted
14 Nov 2019
First published
14 Nov 2019

Chem. Commun., 2019,55, 14801-14804

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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