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Efficient oxygen reduction electrocatalyst derived from facile Fe,N-surface treatment of carbon black.

Authors :
Guo Y
Wang Z
Wang Y
Ma L
Zhang N
Jiang R
Source :
Journal of colloid and interface science [J Colloid Interface Sci] 2022 Jan; Vol. 605, pp. 101-109. Date of Electronic Publication: 2021 Jul 18.
Publication Year :
2022

Abstract

The development of nonprecious metal-based electrocatalysts for oxygen reduction reaction (ORR) is a central task in renewable electrochemical energy conversion and storage technologies. Iron-nitrogen doped carbon-based (Fe-N/C) materials are promising alternatives to Pt-based ORR electrocatalysts. Owing to large specific surface area and outstanding electrical conductivity, carbon black is an inborn support for electrocatalysts. Unfortunately, the direct incorporation of Fe-N <subscript>x</subscript> moieties onto the surface of carbon black has not been realized to date. Herein, Fe-N <subscript>x</subscript> moieties are directly incorporated onto the surface of carbon black through surface modification and the following Fe and N co-doping. The obtained Fe and N co-doped carbon back (Fe-N/CB) catalyst has very large specific surface area and abundant accessible Fe-N <subscript>x</subscript> moieties. As a result, Fe-N/CB electrocatalyst exhibits a more positive half-wave potential (0.86 V) than Pt/C. The Fe-N/CB catalyst also displays better stability and methanol resistance than Pt/C. The Zn-air battery with Fe-N/CB as cathodic catalyst shows a maximum power density of 68 mW cm <superscript>-2</superscript> and a specific capacity of 676 mAh g <subscript>Zn</subscript> <superscript>-1</superscript> . Our finding provides a convenient and low-cost approach to fabricating efficient M-N/C-based catalysts and will be helpful to the development of renewable electrochemical energy conversion and storage technologies.<br />Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2021 Elsevier Inc. All rights reserved.)

Details

Language :
English
ISSN :
1095-7103
Volume :
605
Database :
MEDLINE
Journal :
Journal of colloid and interface science
Publication Type :
Academic Journal
Accession number :
34311304
Full Text :
https://doi.org/10.1016/j.jcis.2021.07.071