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Bimetallic ZIF derived Co nanoparticle anchored N-doped porous carbons for an efficient oxygen reduction reaction

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Abstract

Five isostructural, new bimetallic ZIF precursors with various Zn/Co ratios were successfully synthesized to derive a series of N-doped porous carbons embedded with Co nanoparticles. We systematically investigated the effect of different bimetal ratios in ZIF precursors on the electrocatalytic properties of the obtained porous carbon catalysts. The optimised material Zn2Co1-NPs@NC sample demonstrated excellent oxygen reduction reaction performance with a half-wave potential (E1/2) of 0.849 V, superior to that of commercial Pt/C, and the electron transfer number was 3.98 at 0.2 V to 0.5 V, exhibiting a nearly four-electron selectivity. Furthermore, by exploring the current–time chronoamperometric response over 40 000 s, it is shown that the long-term stability of Zn2Co1-NPs@NC was much better than that of the commercial Pt/C.

Graphical abstract: Bimetallic ZIF derived Co nanoparticle anchored N-doped porous carbons for an efficient oxygen reduction reaction

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Article information


Submitted
16 Nov 2019
Accepted
20 Dec 2019
First published
02 Jan 2020

Inorg. Chem. Front., 2020, Advance Article
Article type
Research Article

Bimetallic ZIF derived Co nanoparticle anchored N-doped porous carbons for an efficient oxygen reduction reaction

K. Li, D. Li, L. Zhu, Z. Gao, Q. Fang, M. Xue, S. Qiu and X. Yao, Inorg. Chem. Front., 2020, Advance Article , DOI: 10.1039/C9QI01487J

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