Ni/YMnO3 perovskite catalyst for CO2 methanation

This work proposes an innovative Ni catalyst supported over YMnO3 perovskite as a promising catalytic system for CO2 methanation reaction. Under reductive conditions, the attendance of Mn redox couples within the layered perovskite structure promotes the constitution of sub-stoichiometric YMnO3-x un...

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Autores: González Castaño, Míriam, Navarro de Miguel, Juan Carlos, Penkova, Anna Dimitrova, Centeno, M. A., Odriozola Gordón, José Antonio, Arellano-García, H.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2021
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/182938
Acceso en línea:https://hdl.handle.net/11441/182938
https://doi.org/10.1016/j.apmt.2021.101055
Access Level:acceso abierto
Palabra clave:Ni catalysts
CO2 methanation
YMnO3
Perovskites
Manganites
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spelling Ni/YMnO3 perovskite catalyst for CO2 methanationGonzález Castaño, MíriamNavarro de Miguel, Juan CarlosPenkova, Anna DimitrovaCenteno, M. A.Odriozola Gordón, José AntonioArellano-García, H.Ni catalystsCO2 methanationYMnO3PerovskitesManganitesThis work proposes an innovative Ni catalyst supported over YMnO3 perovskite as a promising catalytic system for CO2 methanation reaction. Under reductive conditions, the attendance of Mn redox couples within the layered perovskite structure promotes the constitution of sub-stoichiometric YMnO3-x units which, by means of the flexible YMnO3-x reorganization capacity, results in boosted anionic mobility's. The competitive turnover frequencies (20.1 and 17.0 s−1 at 400 °C under dry- and steamed- CO2 methanation conditions) displayed by Ni/YMnO3 system were related to the synergism between strongly interacting Ni particles with partially reduced YMnO3-x perovskites. The optimal Ni dispersions, for which no relevant signs of sintering issues were discerned, combined to effective role of oxygen vacancies towards the dissociative activation of CO2 molecules enabled highly active and stable catalytic behaviours with no evidence of cooking phenomena. On evaluating the water presence within CO2 methanation feedstock's, the deprived catalytic behaviour was fundamentally associated to depleted oxygen vacancies concentrations and promoted WGS side reactions.ElsevierQuímica Inorgánica2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/182938https://doi.org/10.1016/j.apmt.2021.101055reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésApplied Materials Today, 23, 101055.https://www.sciencedirect.com/science/article/abs/pii/S2352940721001207?via%3Dihubinfo:eu-repo/semantics/openAccessoai:idus.us.es:11441/1829382026-06-17T12:51:07Z
dc.title.none.fl_str_mv Ni/YMnO3 perovskite catalyst for CO2 methanation
title Ni/YMnO3 perovskite catalyst for CO2 methanation
spellingShingle Ni/YMnO3 perovskite catalyst for CO2 methanation
González Castaño, Míriam
Ni catalysts
CO2 methanation
YMnO3
Perovskites
Manganites
title_short Ni/YMnO3 perovskite catalyst for CO2 methanation
title_full Ni/YMnO3 perovskite catalyst for CO2 methanation
title_fullStr Ni/YMnO3 perovskite catalyst for CO2 methanation
title_full_unstemmed Ni/YMnO3 perovskite catalyst for CO2 methanation
title_sort Ni/YMnO3 perovskite catalyst for CO2 methanation
dc.creator.none.fl_str_mv González Castaño, Míriam
Navarro de Miguel, Juan Carlos
Penkova, Anna Dimitrova
Centeno, M. A.
Odriozola Gordón, José Antonio
Arellano-García, H.
author González Castaño, Míriam
author_facet González Castaño, Míriam
Navarro de Miguel, Juan Carlos
Penkova, Anna Dimitrova
Centeno, M. A.
Odriozola Gordón, José Antonio
Arellano-García, H.
author_role author
author2 Navarro de Miguel, Juan Carlos
Penkova, Anna Dimitrova
Centeno, M. A.
Odriozola Gordón, José Antonio
Arellano-García, H.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Química Inorgánica
dc.subject.none.fl_str_mv Ni catalysts
CO2 methanation
YMnO3
Perovskites
Manganites
topic Ni catalysts
CO2 methanation
YMnO3
Perovskites
Manganites
description This work proposes an innovative Ni catalyst supported over YMnO3 perovskite as a promising catalytic system for CO2 methanation reaction. Under reductive conditions, the attendance of Mn redox couples within the layered perovskite structure promotes the constitution of sub-stoichiometric YMnO3-x units which, by means of the flexible YMnO3-x reorganization capacity, results in boosted anionic mobility's. The competitive turnover frequencies (20.1 and 17.0 s−1 at 400 °C under dry- and steamed- CO2 methanation conditions) displayed by Ni/YMnO3 system were related to the synergism between strongly interacting Ni particles with partially reduced YMnO3-x perovskites. The optimal Ni dispersions, for which no relevant signs of sintering issues were discerned, combined to effective role of oxygen vacancies towards the dissociative activation of CO2 molecules enabled highly active and stable catalytic behaviours with no evidence of cooking phenomena. On evaluating the water presence within CO2 methanation feedstock's, the deprived catalytic behaviour was fundamentally associated to depleted oxygen vacancies concentrations and promoted WGS side reactions.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/182938
https://doi.org/10.1016/j.apmt.2021.101055
url https://hdl.handle.net/11441/182938
https://doi.org/10.1016/j.apmt.2021.101055
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Applied Materials Today, 23, 101055.
https://www.sciencedirect.com/science/article/abs/pii/S2352940721001207?via%3Dihub
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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