Isotopic and in situ DRIFTS study of the CO2 methanation mechanism using Ni/CeO2 and Ni/Al2O3 catalysts

The CO2 methanation mechanism was studied for Ni/CeO2 and Ni/Al2O3 catalysts. The higher methanation activity and selectivity of Ni/CeO2 is attributed to: i) Ni/CeO2 combines two types of active sites efficient for CO2 dissociation at the NiO-Ceria interface and for H2 dissociation on Ni0 particles;...

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Autores: Cárdenas Arenas, Andrea, Quindimil Rengel, Adrián, Davó Quiñonero, Arantxa, Bailon Garcia, Esther, Lozano Castello, Dolores, De La Torre Larrañaga, Unai, Pereda Ayo, Beñat, González Marcos, José Antonio, González Velasco, Juan Ramón, Bueno López, Agustín
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/65955
Acceso en línea:http://hdl.handle.net/10810/65955
Access Level:acceso abierto
Palabra clave:CO2 methanation
nickel
ceria
metal-support interaction
mechanism
isotope
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spelling Isotopic and in situ DRIFTS study of the CO2 methanation mechanism using Ni/CeO2 and Ni/Al2O3 catalystsCárdenas Arenas, AndreaQuindimil Rengel, AdriánDavó Quiñonero, ArantxaBailon Garcia, EstherLozano Castello, DoloresDe La Torre Larrañaga, UnaiPereda Ayo, BeñatGonzález Marcos, José AntonioGonzález Velasco, Juan RamónBueno López, AgustínCO2 methanationnickelceriametal-support interactionmechanismisotopeThe CO2 methanation mechanism was studied for Ni/CeO2 and Ni/Al2O3 catalysts. The higher methanation activity and selectivity of Ni/CeO2 is attributed to: i) Ni/CeO2 combines two types of active sites efficient for CO2 dissociation at the NiO-Ceria interface and for H2 dissociation on Ni0 particles; ii) water desorption is the slowest mechanism step, and, due to the high oxygen mobility throughout the ceria lattice, water is not necessarily formed on the same active sites that chemisorb CO2, i.e., the CO2 chemisorption sites are not blocked by water molecules; iii) the Ni/CeO2 surface does not accumulate carbon-containing species under reaction conditions, which allows faster chemisorption and dissociation of CO2. The Ni/Al2O3 catalyst handicaps are that all the steps of the mechanism take place on the same active sites, and the slow release of water and the accumulation of surface formates on these sites delay the chemisorption of further CO2 molecules.Financial support of: - Economy and Competitiveness Spanish Ministry: Projects CTQ2015-67597-C2-1-R and CTQ2015-67597-C2-2-R MINECO-FEDER) and grant of EBG FJCI-2015-23769. - Generalitat Valenciana: Project PROMETEO/2018/076 and PhD grant of ACA GRISOLIAP/2017/185. - The Basque Government: Project IT657-13. - SGIker (Analytical Services) at the University of the Basque Country. - Spanish Ministry of Education, Culture and Sports grant of ADQ FPU14/01178. - University of the Basque Country PhD grant of AQ PIF-495 15/351.Elsevier202420242019info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/65955reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/MINECO/CTQ2015-67597-C2-1-R/info:eu-repo/grantAgreement/MINECO/CTQ2015-67597-C2-2-R/https://www.sciencedirect.com/science/article/pii/S0926337319312846info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/© 2019 Elsevier under CC BY-NC-ND licenseoai:addi.ehu.eus:10810/659552026-06-18T09:23:17Z
dc.title.none.fl_str_mv Isotopic and in situ DRIFTS study of the CO2 methanation mechanism using Ni/CeO2 and Ni/Al2O3 catalysts
title Isotopic and in situ DRIFTS study of the CO2 methanation mechanism using Ni/CeO2 and Ni/Al2O3 catalysts
spellingShingle Isotopic and in situ DRIFTS study of the CO2 methanation mechanism using Ni/CeO2 and Ni/Al2O3 catalysts
Cárdenas Arenas, Andrea
CO2 methanation
nickel
ceria
metal-support interaction
mechanism
isotope
title_short Isotopic and in situ DRIFTS study of the CO2 methanation mechanism using Ni/CeO2 and Ni/Al2O3 catalysts
title_full Isotopic and in situ DRIFTS study of the CO2 methanation mechanism using Ni/CeO2 and Ni/Al2O3 catalysts
title_fullStr Isotopic and in situ DRIFTS study of the CO2 methanation mechanism using Ni/CeO2 and Ni/Al2O3 catalysts
title_full_unstemmed Isotopic and in situ DRIFTS study of the CO2 methanation mechanism using Ni/CeO2 and Ni/Al2O3 catalysts
title_sort Isotopic and in situ DRIFTS study of the CO2 methanation mechanism using Ni/CeO2 and Ni/Al2O3 catalysts
dc.creator.none.fl_str_mv Cárdenas Arenas, Andrea
Quindimil Rengel, Adrián
Davó Quiñonero, Arantxa
Bailon Garcia, Esther
Lozano Castello, Dolores
De La Torre Larrañaga, Unai
Pereda Ayo, Beñat
González Marcos, José Antonio
González Velasco, Juan Ramón
Bueno López, Agustín
author Cárdenas Arenas, Andrea
author_facet Cárdenas Arenas, Andrea
Quindimil Rengel, Adrián
Davó Quiñonero, Arantxa
Bailon Garcia, Esther
Lozano Castello, Dolores
De La Torre Larrañaga, Unai
Pereda Ayo, Beñat
González Marcos, José Antonio
González Velasco, Juan Ramón
Bueno López, Agustín
author_role author
author2 Quindimil Rengel, Adrián
Davó Quiñonero, Arantxa
Bailon Garcia, Esther
Lozano Castello, Dolores
De La Torre Larrañaga, Unai
Pereda Ayo, Beñat
González Marcos, José Antonio
González Velasco, Juan Ramón
Bueno López, Agustín
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv CO2 methanation
nickel
ceria
metal-support interaction
mechanism
isotope
topic CO2 methanation
nickel
ceria
metal-support interaction
mechanism
isotope
description The CO2 methanation mechanism was studied for Ni/CeO2 and Ni/Al2O3 catalysts. The higher methanation activity and selectivity of Ni/CeO2 is attributed to: i) Ni/CeO2 combines two types of active sites efficient for CO2 dissociation at the NiO-Ceria interface and for H2 dissociation on Ni0 particles; ii) water desorption is the slowest mechanism step, and, due to the high oxygen mobility throughout the ceria lattice, water is not necessarily formed on the same active sites that chemisorb CO2, i.e., the CO2 chemisorption sites are not blocked by water molecules; iii) the Ni/CeO2 surface does not accumulate carbon-containing species under reaction conditions, which allows faster chemisorption and dissociation of CO2. The Ni/Al2O3 catalyst handicaps are that all the steps of the mechanism take place on the same active sites, and the slow release of water and the accumulation of surface formates on these sites delay the chemisorption of further CO2 molecules.
publishDate 2019
dc.date.none.fl_str_mv 2019
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/65955
url http://hdl.handle.net/10810/65955
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO/CTQ2015-67597-C2-1-R/
info:eu-repo/grantAgreement/MINECO/CTQ2015-67597-C2-2-R/
https://www.sciencedirect.com/science/article/pii/S0926337319312846
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
© 2019 Elsevier under CC BY-NC-ND license
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
© 2019 Elsevier under CC BY-NC-ND license
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:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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