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Fe-N catalyst derived from and supported on Lycopodium clavatum sporopollenin exine capsules for the oxygen reduction reaction

Malik, Waqas; Tafoya, Jorge Pavel Victoria; Doszczeczko, Szymon; Sobrido, Ana Belen Jorge; Boa, Andrew N.; Volpe, Roberto

Authors

Waqas Malik

Jorge Pavel Victoria Tafoya

Szymon Doszczeczko

Ana Belen Jorge Sobrido

Roberto Volpe



Abstract

A carbon-supported electrocatalyst, featuring carbon nanotubes anchored on 3D porous graphitic carbon, was developed with the aim to perform in the operating conditions of alkaline fuel cells and metal air batteries. The catalyst was developed via two steps: first powders of Sporopollenin exine capsules used as a bio-based carbon support were activated via CO2 gasification to obtain a high specific area and porosity, second the derived porous carbons were impregnated by an iron salt and a nitrogen source, to be carbonised in Nitrogen at high temperature. The prepared catalyst demonstrated an efficient oxygen reduction reaction activity showing a half-wave potential of ~ 0.775 V vs. Reversible hydrogen electrode, comparable with that of commercial 20 wt% Pt/C in alkaline conditions, a good stability after accelerated degradation testing, retaining ~ 86% of the initial limiting current density, and a higher diffusion limited current density (6.3 vs. 5.1 mA cm− 2) than the commercial counterpart. Overall, we show the suitability of Sporopollenin exine capsule as support for electrocatalysis and a promising methodology to develop sustainable catalysts for the oxygen reduction reaction.

Citation

Malik, W., Tafoya, J. P. V., Doszczeczko, S., Sobrido, A. B. J., Boa, A. N., & Volpe, R. (2024). Fe-N catalyst derived from and supported on Lycopodium clavatum sporopollenin exine capsules for the oxygen reduction reaction. Scientific reports, 14(1), Article 26052. https://doi.org/10.1038/s41598-024-77780-1

Journal Article Type Article
Acceptance Date Oct 25, 2024
Online Publication Date Oct 30, 2024
Publication Date Dec 1, 2024
Deposit Date Nov 18, 2024
Publicly Available Date Nov 18, 2024
Journal Scientific Reports
Print ISSN 2045-2322
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 14
Issue 1
Article Number 26052
DOI https://doi.org/10.1038/s41598-024-77780-1
Keywords Oxygen reduction reaction; Sporopollenin exine capsules; Iron; Carbon-nanotubes
Public URL https://hull-repository.worktribe.com/output/4919656

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0

Copyright Statement
© The Author(s) 2024.
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.




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