Enhancing CO2 methanation over Rh catalyst supported on ZrO2 cubic phase stabilized by MgO addition

[EN] Here, it reports the influence of MgO incorporation on the structural and catalytic properties of Rh catalysts supported on ZrO2 for CO2 methanation. The results show that MgO addition promotes the formation of the cubic phase of ZrO2, leading to an increase in surface area, oxygen vacancies, a...

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Autores: Ayala-Flores, F., Huirache-Acuna, R., Solis-Garcia, A., Fierro-Gonzalez, J.C., Gómez, Daviel, Berhault, G., Gil, S., Lopez-Chico, D.Y., Garcia-Bordeje, E., Zepeda, T.A., Concepción Heydorn, Patricia|||0000-0003-2058-3103
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/225505
Acceso en línea:https://riunet.upv.es/handle/10251/225505
Access Level:acceso abierto
Palabra clave:CO2 Methanation
Reaction mechanism
Supported rhodium catalysts
Magnesium oxide
Operando FTIR
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spelling Enhancing CO2 methanation over Rh catalyst supported on ZrO2 cubic phase stabilized by MgO additionAyala-Flores, F.Huirache-Acuna, R.Solis-Garcia, A.Fierro-Gonzalez, J.C.Gómez, DavielBerhault, G.Gil, S.Lopez-Chico, D.Y.Garcia-Bordeje, E.Zepeda, T.A.Concepción Heydorn, Patricia|||0000-0003-2058-3103CO2 MethanationReaction mechanismSupported rhodium catalystsMagnesium oxideOperando FTIR[EN] Here, it reports the influence of MgO incorporation on the structural and catalytic properties of Rh catalysts supported on ZrO2 for CO2 methanation. The results show that MgO addition promotes the formation of the cubic phase of ZrO2, leading to an increase in surface area, oxygen vacancies, and surface basicity, factors that collectively enhance CO2 adsorption and activation under reaction conditions. Catalytic testing revealed that a low MgO content (1.7 wt %) yielded the highest CO2 conversion (37.8 % at 325 degrees C), while higher MgO loadings resulted in decreased activity. Notably, the catalyst with the highest MgO content (5.5 wt %) exhibited remarkably low CO selectivity (1.4 %), indicating suppression of the reverse water-gas shift (RWGS) reaction in favor of the associative methanation pathway. This behavior is related to the increase in surface basicity, which significantly influences the nature of surface intermediates during the reaction, favoring methane formation via direct CO2 hydrogenation. In situ FTIR analysis confirmed the presence of key intermediates, such as formate and Rh0-carbonyl species. As MgO content increased, the formation of Rh0-carbonyl species diminished, further promoting selectivity toward methane.Research funded by PAPIIT-DGAPA, UNAM grant projects IN112922 and IN110125. Thanks to project CONACYT F003 117373 for their partial financial support. R. Huirache-Acuna and G. Berhault want to thank the financial support of SEP-CONACYT-ANUIES-ECOS NORD-322574 and M22P01 Projects. R. Huirache-Acuna acknowledge to CIC UMSNH 2024-2025 and PICIR22-047-C Projects. The authors thank David Dominguez, Erick Flores, Israel Gradilla, Pedro Casillas, and Eloisa Aparicio for technical assistance.ElsevierInstituto Universitario Mixto de Tecnología QuímicaUniversidad Nacional Autónoma de MéxicoUniversidad Michoacana de San Nicolás de Hidalgo, MéxicoConsejo Nacional de Humanidades, Ciencias y Tecnologías, MéxicoRepositorio Institucional de la Universitat Politècnica de València Riunet20252025-10-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://riunet.upv.es/handle/10251/225505reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengUniversidad Michoacana de San Nicolás de Hidalgo, México https://doi.org/10.13039/501100004803 PICIR22-047-CUniversidad Nacional Autónoma de México https://doi.org/10.13039/501100005739 IN112922Universidad Nacional Autónoma de México https://doi.org/10.13039/501100005739 IN110125CONAHCYT CONAHCYT CONACYTCONAHCYT CONAHCYT CONACYTCONAHCYT CONAHCYT CONACYTopen accesshttp://purl.org/coar/access_right/c_abf2Reconocimiento - No comercial (by-nc) http://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/2255052026-06-13T07:49:27Z
dc.title.none.fl_str_mv Enhancing CO2 methanation over Rh catalyst supported on ZrO2 cubic phase stabilized by MgO addition
title Enhancing CO2 methanation over Rh catalyst supported on ZrO2 cubic phase stabilized by MgO addition
spellingShingle Enhancing CO2 methanation over Rh catalyst supported on ZrO2 cubic phase stabilized by MgO addition
Ayala-Flores, F.
CO2 Methanation
Reaction mechanism
Supported rhodium catalysts
Magnesium oxide
Operando FTIR
title_short Enhancing CO2 methanation over Rh catalyst supported on ZrO2 cubic phase stabilized by MgO addition
title_full Enhancing CO2 methanation over Rh catalyst supported on ZrO2 cubic phase stabilized by MgO addition
title_fullStr Enhancing CO2 methanation over Rh catalyst supported on ZrO2 cubic phase stabilized by MgO addition
title_full_unstemmed Enhancing CO2 methanation over Rh catalyst supported on ZrO2 cubic phase stabilized by MgO addition
title_sort Enhancing CO2 methanation over Rh catalyst supported on ZrO2 cubic phase stabilized by MgO addition
dc.creator.none.fl_str_mv Ayala-Flores, F.
Huirache-Acuna, R.
Solis-Garcia, A.
Fierro-Gonzalez, J.C.
Gómez, Daviel
Berhault, G.
Gil, S.
Lopez-Chico, D.Y.
Garcia-Bordeje, E.
Zepeda, T.A.
Concepción Heydorn, Patricia|||0000-0003-2058-3103
author Ayala-Flores, F.
author_facet Ayala-Flores, F.
Huirache-Acuna, R.
Solis-Garcia, A.
Fierro-Gonzalez, J.C.
Gómez, Daviel
Berhault, G.
Gil, S.
Lopez-Chico, D.Y.
Garcia-Bordeje, E.
Zepeda, T.A.
Concepción Heydorn, Patricia|||0000-0003-2058-3103
author_role author
author2 Huirache-Acuna, R.
Solis-Garcia, A.
Fierro-Gonzalez, J.C.
Gómez, Daviel
Berhault, G.
Gil, S.
Lopez-Chico, D.Y.
Garcia-Bordeje, E.
Zepeda, T.A.
Concepción Heydorn, Patricia|||0000-0003-2058-3103
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Instituto Universitario Mixto de Tecnología Química
Universidad Nacional Autónoma de México
Universidad Michoacana de San Nicolás de Hidalgo, México
Consejo Nacional de Humanidades, Ciencias y Tecnologías, México
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv CO2 Methanation
Reaction mechanism
Supported rhodium catalysts
Magnesium oxide
Operando FTIR
topic CO2 Methanation
Reaction mechanism
Supported rhodium catalysts
Magnesium oxide
Operando FTIR
description [EN] Here, it reports the influence of MgO incorporation on the structural and catalytic properties of Rh catalysts supported on ZrO2 for CO2 methanation. The results show that MgO addition promotes the formation of the cubic phase of ZrO2, leading to an increase in surface area, oxygen vacancies, and surface basicity, factors that collectively enhance CO2 adsorption and activation under reaction conditions. Catalytic testing revealed that a low MgO content (1.7 wt %) yielded the highest CO2 conversion (37.8 % at 325 degrees C), while higher MgO loadings resulted in decreased activity. Notably, the catalyst with the highest MgO content (5.5 wt %) exhibited remarkably low CO selectivity (1.4 %), indicating suppression of the reverse water-gas shift (RWGS) reaction in favor of the associative methanation pathway. This behavior is related to the increase in surface basicity, which significantly influences the nature of surface intermediates during the reaction, favoring methane formation via direct CO2 hydrogenation. In situ FTIR analysis confirmed the presence of key intermediates, such as formate and Rh0-carbonyl species. As MgO content increased, the formation of Rh0-carbonyl species diminished, further promoting selectivity toward methane.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-10-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://riunet.upv.es/handle/10251/225505
url https://riunet.upv.es/handle/10251/225505
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Universidad Michoacana de San Nicolás de Hidalgo, México https://doi.org/10.13039/501100004803 PICIR22-047-C
Universidad Nacional Autónoma de México https://doi.org/10.13039/501100005739 IN112922
Universidad Nacional Autónoma de México https://doi.org/10.13039/501100005739 IN110125
CONAHCYT CONAHCYT CONACYT
CONAHCYT CONAHCYT CONACYT
CONAHCYT CONAHCYT CONACYT
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento - No comercial (by-nc)
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
Reconocimiento - No comercial (by-nc)
http://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname:Universitat Politècnica de València (UPV)
instname_str Universitat Politècnica de València (UPV)
reponame_str RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
collection RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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