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Issue 5, 2020
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Atomic cobalt catalysts for the oxygen evolution reaction

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Abstract

Development of high-efficiency single-atom catalysts (SACs) for the oxygen evolution reaction (OER) is challenging. Herein, we report a facile annealing strategy to construct an atomically dispersed cobalt- and nitrogen-codoped graphene catalyst for high-efficiency OER. The as-prepared 0.7-Co@NG-750 electrocatalyst requires an ultra-low onset overpotential of approximately 210 mV on a glassy carbon electrode in both 1.0 M KOH and 0.1 M KOH solutions. The density functional theory (DFT) calculations reveal that the theoretical overpotential on Co–N4 and Co–N2C2 sites is 0.41 and 0.53 V, respectively, and these might be efficient active sites for electrocatalytic water oxidation.

Graphical abstract: Atomic cobalt catalysts for the oxygen evolution reaction

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Supplementary files

Article information


Submitted
19 Nov 2019
Accepted
10 Dec 2019
First published
11 Dec 2019

Chem. Commun., 2020,56, 794-797
Article type
Communication

Atomic cobalt catalysts for the oxygen evolution reaction

Q. Zhang, Z. Duan, M. Li and J. Guan, Chem. Commun., 2020, 56, 794
DOI: 10.1039/C9CC09007J

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