Revealing the Importance of Iron Aerogel Features as Electrocatalysts for the Oxygen Reduction Reaction

(This article belongs to the Special Issue Advanced Metal Gels: Synthesis and Applications).

Detalles Bibliográficos
Autores: González-Lavín, Judith, Arenillas, Ana, Rey-Raap, Natalia
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/385701
Acceso en línea:http://hdl.handle.net/10261/385701
Access Level:acceso abierto
Palabra clave:Iron aerogel
Electrocatalyst
Oxygen reduction reaction
Transition metal
Carbon functionalization
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spelling Revealing the Importance of Iron Aerogel Features as Electrocatalysts for the Oxygen Reduction ReactionGonzález-Lavín, JudithArenillas, AnaRey-Raap, NataliaIron aerogelElectrocatalystOxygen reduction reactionTransition metalCarbon functionalization(This article belongs to the Special Issue Advanced Metal Gels: Synthesis and Applications).Metal nanoparticles supported in carbon materials are the traditional electrocatalyst currently used in many applications. However, these composite materials have many problems associated with the optimization of both components for the specific application, besides the stability of the mixture. Self-supported metallic materials may be an interesting strategy in order to avoid the traditional carbon supports; however, these metallic materials should present highly active surface area. Iron aerogels are presented in this work as effective and affordable unsupported electrocatalysts. The combination of their metallic structure with high porosity (i.e., 85 m<sup>2</sup> g<sup>−1</sup> and 0.45 cm<sup>3</sup> g<sup>−1</sup> of mesopore volume), due to their interconnected tridimensional structure, leads to a great activity versus the oxygen reduction reaction. A method for producing iron aerogels based on microwave-assisted sol–gel methodology is presented. The incorporation of carbon functionalities to the iron aerogels seems to clearly influence the mechanism of the reaction, favoring the direct mechanism of the oxygen reduction reaction and thus notably improving the performance of the electrocatalysts. Chemical vapor deposition seems to be an adequate methodology for incorporating carbon functionalities to the transition metal structure without affecting the tridimensional network and leading to current densities over 4 mA cm<sup>−2</sup> and great stability even after 10,000 s.This research was funded by MCIN/AEI/10.13039/501100011033/FEDER-UE through the PID2022-139493OA-100 project. NRR is grateful for the RyC2021-031456-I and CNS2023-144627 grants funded by MCIN/AEI/10.13039/501100011033 and the European Union NextGenerationEU/PRTR. JGL is grateful to the Principado de Asturias for her PhD grant from the Severo Ochoa Program.Peer reviewedMultidisciplinary Digital Publishing InstituteAgencia Estatal de Investigación (España)Ministerio de Ciencia e Innovación (España)European CommissionPrincipado de AsturiasGonzález-Lavín, Judith [0000-0001-7408-8031]Arenillas, Ana [0000-0002-5388-1169]Rey-Raap, Natalia [0000-0002-5003-0035]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2025202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/385701reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-139493OA-I00The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI https://doi.org/10.3390/gels11030154https://doi.org/10.3390/gels11030154Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3857012026-05-22T06:33:51Z
dc.title.none.fl_str_mv Revealing the Importance of Iron Aerogel Features as Electrocatalysts for the Oxygen Reduction Reaction
title Revealing the Importance of Iron Aerogel Features as Electrocatalysts for the Oxygen Reduction Reaction
spellingShingle Revealing the Importance of Iron Aerogel Features as Electrocatalysts for the Oxygen Reduction Reaction
González-Lavín, Judith
Iron aerogel
Electrocatalyst
Oxygen reduction reaction
Transition metal
Carbon functionalization
title_short Revealing the Importance of Iron Aerogel Features as Electrocatalysts for the Oxygen Reduction Reaction
title_full Revealing the Importance of Iron Aerogel Features as Electrocatalysts for the Oxygen Reduction Reaction
title_fullStr Revealing the Importance of Iron Aerogel Features as Electrocatalysts for the Oxygen Reduction Reaction
title_full_unstemmed Revealing the Importance of Iron Aerogel Features as Electrocatalysts for the Oxygen Reduction Reaction
title_sort Revealing the Importance of Iron Aerogel Features as Electrocatalysts for the Oxygen Reduction Reaction
dc.creator.none.fl_str_mv González-Lavín, Judith
Arenillas, Ana
Rey-Raap, Natalia
author González-Lavín, Judith
author_facet González-Lavín, Judith
Arenillas, Ana
Rey-Raap, Natalia
author_role author
author2 Arenillas, Ana
Rey-Raap, Natalia
author2_role author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación (España)
Ministerio de Ciencia e Innovación (España)
European Commission
Principado de Asturias
González-Lavín, Judith [0000-0001-7408-8031]
Arenillas, Ana [0000-0002-5388-1169]
Rey-Raap, Natalia [0000-0002-5003-0035]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Iron aerogel
Electrocatalyst
Oxygen reduction reaction
Transition metal
Carbon functionalization
topic Iron aerogel
Electrocatalyst
Oxygen reduction reaction
Transition metal
Carbon functionalization
description (This article belongs to the Special Issue Advanced Metal Gels: Synthesis and Applications).
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/385701
url http://hdl.handle.net/10261/385701
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-139493OA-I00
The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI https://doi.org/10.3390/gels11030154
https://doi.org/10.3390/gels11030154
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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