Magnesium-templated Fe-N doped carbon materials from biomass waste as electrocatalysts for oxygen reduction reaction in alkaline media

Fe-N-C electrocatalysts derived from Posidonia oceanica biomass were synthesized using a dual-template approach with MgO nanoparticles and MgCl₂·6H₂O to enhance electrocatalytic activity for the oxygen reduction reaction (ORR). The electrocatalysts, designed as Fe-N-C (MgO) and Fe-N-C (MgO@MgCl2), w...

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Detalles Bibliográficos
Autores: Cárdenas-Arenas, Andrea, Pedersen, Angus, Recio, F. Javier, Barrio, Jesús, Titirici, Maria Magdalena, Montiel, Vicente, Solla-Gullón, José
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/744200
Acceso en línea:https://hdl.handle.net/10486/744200
https://dx.doi.org/10.1016/j.electacta.2025.146899
Access Level:acceso abierto
Palabra clave:Electrocatalysis
Fe-N-C electrocatalyst
oxygen reduction reaction
carbon materials
waste valorisation
Química
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spelling Magnesium-templated Fe-N doped carbon materials from biomass waste as electrocatalysts for oxygen reduction reaction in alkaline mediaCárdenas-Arenas, AndreaPedersen, AngusRecio, F. JavierBarrio, JesúsTitirici, Maria MagdalenaMontiel, VicenteSolla-Gullón, JoséElectrocatalysisFe-N-C electrocatalystoxygen reduction reactioncarbon materialswaste valorisationQuímicaFe-N-C electrocatalysts derived from Posidonia oceanica biomass were synthesized using a dual-template approach with MgO nanoparticles and MgCl₂·6H₂O to enhance electrocatalytic activity for the oxygen reduction reaction (ORR). The electrocatalysts, designed as Fe-N-C (MgO) and Fe-N-C (MgO@MgCl2), were characterized by N2 sorption analysis, scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDXS), X-Ray diffraction (XRD), Raman spectroscopy, X-Ray Photoelectron Spectroscopy (XPS), and inductively coupled plasma optical emission spectroscopy (ICP-OES). Fe-N-C (MgO@MgCl₂) exhibited a high specific surface area of 1075 m²/g and a micropore volume of 0.466 cm³/g, as well as a homogenous distribution of Fe species. Electrochemical analyses, including double-layer capacitance measurements, indicated that incorporating MgCl2·6H2O as a template in Fe-N-C (MgO@MgCl₂) synthesis significantly increased the electrochemically active surface area (ECSA) (177.5 cm2 vs. 127.5 cm2 for Fe-N-C (MgO)), which is essential for effective ion transport and ORR kinetics. Rotating disk electrode (RDE) tests revealed superior ORR performance of Fe-N-C (MgO@MgCl₂) in alkaline media (0.1 M KOH), with a kinetic current (ik) of -0.70 mA at 0.8 VRHE and mass activity of 13.7 A g-1, outperforming Fe-N-C (MgO) which showed values of -0.26 mA and 5.2 A g-1, respectively. Stability tests showed that Fe-N-C (MgO@MgCl₂) maintained 90.4 % of its kinetic current after 8000 cycles in RDE under O2-saturation, highlighting its robust durability. These results demonstrate that the hierarchical porous structure achieved by dual templating effectively enhances the electrocatalytic activity and stability of Fe-N-C materials for ORR, positioning biomass-derived electrocatalysts as a sustainable alternative to conventional electrocatalystsA.C.A. acknowledges the financial support provided by the APOSTD/ 2021/066 Grant, funded by the Generalitat Valenciana and the European Social Fund, as well as the MARSALAS22-06 Grant, funded by the European Union through the Next Generation EU program. A.P. acknowledges the EPSRC Centre for Doctoral Training in the Advanced Characterization of Materials (grant number EP/L015277/1) and the EPSRC Doctoral Prize Fellowship (EP/W524323/1). J.B. acknowledges f inancial support from Imperial College London via the Imperial College Research Fellowship scheme. M.T. acknowledges funding from the Royal Academy of Engineering Chair in Emerging Technologies. A.C.A., V.M., and J.S.G., also acknowledge financial support from the Spanish Research Agency (AEI) through project PID2022–138491OB-C32 funded by MICIU/AEI/10.13039/501100011033 and by ERDF/EUElsevierDepartamento de Química Física AplicadaFacultad de CienciasAgencia Estatal de Investigación20252025-07-23research articlehttp://purl.org/coar/resource_type/c_2df8fbb1EVoRhttp://purl.org/coar/version/c_dc82b40f9837b551info:eu-repo/semantics/articleapplication/pdfapplication/mswordhttps://hdl.handle.net/10486/744200https://dx.doi.org/10.1016/j.electacta.2025.146899reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/7442002026-06-23T12:46:27Z
dc.title.none.fl_str_mv Magnesium-templated Fe-N doped carbon materials from biomass waste as electrocatalysts for oxygen reduction reaction in alkaline media
title Magnesium-templated Fe-N doped carbon materials from biomass waste as electrocatalysts for oxygen reduction reaction in alkaline media
spellingShingle Magnesium-templated Fe-N doped carbon materials from biomass waste as electrocatalysts for oxygen reduction reaction in alkaline media
Cárdenas-Arenas, Andrea
Electrocatalysis
Fe-N-C electrocatalyst
oxygen reduction reaction
carbon materials
waste valorisation
Química
title_short Magnesium-templated Fe-N doped carbon materials from biomass waste as electrocatalysts for oxygen reduction reaction in alkaline media
title_full Magnesium-templated Fe-N doped carbon materials from biomass waste as electrocatalysts for oxygen reduction reaction in alkaline media
title_fullStr Magnesium-templated Fe-N doped carbon materials from biomass waste as electrocatalysts for oxygen reduction reaction in alkaline media
title_full_unstemmed Magnesium-templated Fe-N doped carbon materials from biomass waste as electrocatalysts for oxygen reduction reaction in alkaline media
title_sort Magnesium-templated Fe-N doped carbon materials from biomass waste as electrocatalysts for oxygen reduction reaction in alkaline media
dc.creator.none.fl_str_mv Cárdenas-Arenas, Andrea
Pedersen, Angus
Recio, F. Javier
Barrio, Jesús
Titirici, Maria Magdalena
Montiel, Vicente
Solla-Gullón, José
author Cárdenas-Arenas, Andrea
author_facet Cárdenas-Arenas, Andrea
Pedersen, Angus
Recio, F. Javier
Barrio, Jesús
Titirici, Maria Magdalena
Montiel, Vicente
Solla-Gullón, José
author_role author
author2 Pedersen, Angus
Recio, F. Javier
Barrio, Jesús
Titirici, Maria Magdalena
Montiel, Vicente
Solla-Gullón, José
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Química Física Aplicada
Facultad de Ciencias
Agencia Estatal de Investigación
dc.subject.none.fl_str_mv Electrocatalysis
Fe-N-C electrocatalyst
oxygen reduction reaction
carbon materials
waste valorisation
Química
topic Electrocatalysis
Fe-N-C electrocatalyst
oxygen reduction reaction
carbon materials
waste valorisation
Química
description Fe-N-C electrocatalysts derived from Posidonia oceanica biomass were synthesized using a dual-template approach with MgO nanoparticles and MgCl₂·6H₂O to enhance electrocatalytic activity for the oxygen reduction reaction (ORR). The electrocatalysts, designed as Fe-N-C (MgO) and Fe-N-C (MgO@MgCl2), were characterized by N2 sorption analysis, scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDXS), X-Ray diffraction (XRD), Raman spectroscopy, X-Ray Photoelectron Spectroscopy (XPS), and inductively coupled plasma optical emission spectroscopy (ICP-OES). Fe-N-C (MgO@MgCl₂) exhibited a high specific surface area of 1075 m²/g and a micropore volume of 0.466 cm³/g, as well as a homogenous distribution of Fe species. Electrochemical analyses, including double-layer capacitance measurements, indicated that incorporating MgCl2·6H2O as a template in Fe-N-C (MgO@MgCl₂) synthesis significantly increased the electrochemically active surface area (ECSA) (177.5 cm2 vs. 127.5 cm2 for Fe-N-C (MgO)), which is essential for effective ion transport and ORR kinetics. Rotating disk electrode (RDE) tests revealed superior ORR performance of Fe-N-C (MgO@MgCl₂) in alkaline media (0.1 M KOH), with a kinetic current (ik) of -0.70 mA at 0.8 VRHE and mass activity of 13.7 A g-1, outperforming Fe-N-C (MgO) which showed values of -0.26 mA and 5.2 A g-1, respectively. Stability tests showed that Fe-N-C (MgO@MgCl₂) maintained 90.4 % of its kinetic current after 8000 cycles in RDE under O2-saturation, highlighting its robust durability. These results demonstrate that the hierarchical porous structure achieved by dual templating effectively enhances the electrocatalytic activity and stability of Fe-N-C materials for ORR, positioning biomass-derived electrocatalysts as a sustainable alternative to conventional electrocatalysts
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-07-23
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
EVoR
http://purl.org/coar/version/c_dc82b40f9837b551
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10486/744200
https://dx.doi.org/10.1016/j.electacta.2025.146899
url https://hdl.handle.net/10486/744200
https://dx.doi.org/10.1016/j.electacta.2025.146899
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/msword
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
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