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A mesoporous carbon derived from 4,4′-dipyridyl iron as an efficient catalyst for oxygen reduction

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Abstract

Developing highly active and low cost catalysts for oxygen reduction is crucial for the commercialization of advanced energy systems. In this work, a mesoporous carbon was fabricated through a simple pyrolysis procedure by using 4′4-bipyridyl, FeCl3 and SBA-15 as the precursors and templates, respectively. The catalyst exhibits rather high ORR performance, with a half-wave potential of 0.906 V (vs. RHE). The catalyst also demonstrates outstanding stability, excellent methanol tolerance and high selectivity towards the four-electron path. The air electrode fabricated by using the catalyst can enable a zinc–air battery to deliver a specific capacity of 815.6 mA h gZn−1 and a maximum power density of 196.3 mW cm−2, which are among the highest values recently reported, to our knowledge. By comparing the catalysts obtained at different temperatures, we found that the increased graphitic N content together with the higher surface area should be the reasonable origins of the outstanding performance.

Graphical abstract: A mesoporous carbon derived from 4,4′-dipyridyl iron as an efficient catalyst for oxygen reduction

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Article information


Submitted
27 Nov 2019
Accepted
02 Jan 2020
First published
03 Jan 2020

J. Mater. Chem. A, 2020, Advance Article
Article type
Paper

A mesoporous carbon derived from 4,4′-dipyridyl iron as an efficient catalyst for oxygen reduction

X. Gao, X. Li, Q. Wang, C. You, X. Tian, C. Wang, Y. Hua and S. Liao, J. Mater. Chem. A, 2020, Advance Article , DOI: 10.1039/C9TA13033K

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