X-ray photoelectron and Raman spectroscopy of nanostructured ceria in soot oxidation under operando conditions

Ceria nanoshapes exhibiting different amounts of {100}, {110} and {111} facets (cubes, rods, octahedra and polyhedra) were prepared, characterized, tested in the carbon soot oxidation reaction, and studied by operando near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) and operando Rama...

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Autores: García de Andrés, Xènia|||0000-0003-0795-4168, Soler Turu, Lluís|||0000-0003-1591-3366, Casanovas Grau, Albert, Escudero, Carlos, Llorca Piqué, Jordi|||0000-0002-7447-9582
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/361755
Acceso en línea:https://hdl.handle.net/2117/361755
https://dx.doi.org/10.1016/j.carbon.2021.03.009
Access Level:acceso abierto
Palabra clave:Atomic absortion spectroscopy
Spectrum analysis
Raman spectroscopy
Ceria
Nanoshapes
Soot oxidation
NAP-X
PSAP-XPS
Operando characterization
Espectroscòpia d'absorció atòmica
Anàlisi espectral
Espectroscòpia Raman
Àrees temàtiques de la UPC::Energies
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spelling X-ray photoelectron and Raman spectroscopy of nanostructured ceria in soot oxidation under operando conditionsGarcía de Andrés, Xènia|||0000-0003-0795-4168Soler Turu, Lluís|||0000-0003-1591-3366Casanovas Grau, AlbertEscudero, CarlosLlorca Piqué, Jordi|||0000-0002-7447-9582Atomic absortion spectroscopySpectrum analysisRaman spectroscopyCeriaNanoshapesSoot oxidationNAP-XPSAP-XPSRaman spectroscopyOperando characterizationEspectroscòpia d'absorció atòmicaAnàlisi espectralEspectroscòpia RamanÀrees temàtiques de la UPC::EnergiesCeria nanoshapes exhibiting different amounts of {100}, {110} and {111} facets (cubes, rods, octahedra and polyhedra) were prepared, characterized, tested in the carbon soot oxidation reaction, and studied by operando near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) and operando Raman spectroscopy up to 550 °C. The specific soot oxidation reaction rate (mgC·m-2·min-1) clearly indicated that the {110} and {100} crystallographic planes of ceria were more active than the {111} ones for the oxidation of carbon soot. As deduced from the Ce 3d and O 1s signals recorded using different photon energies, all ceria nanoshapes experienced progressive reduction upon increasing the temperature under Ar, which was accompanied by the formation of oxygen vacancies. Raman studies revealed that, at this stage, isolated graphene layers in carbon soot reacted with ceria lattice oxygen atoms following a Mars-Van Krevelen mechanism. After exposure to O2 at 550 °C, a broad signal in the O 1s region at 531.2–532.5 eV was ascribed to surface active oxygen species, such as peroxide (O22-) and superoxide (O2-) species, generated from the interaction of molecular O2 with oxygen vacancies, which proved to be highly reactive to oxidize the graphitic structures of carbon soot.Peer Reviewed20212021-06-0120222022-02-07journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/361755https://dx.doi.org/10.1016/j.carbon.2021.03.009reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3617552026-05-27T15:37:01Z
dc.title.none.fl_str_mv X-ray photoelectron and Raman spectroscopy of nanostructured ceria in soot oxidation under operando conditions
title X-ray photoelectron and Raman spectroscopy of nanostructured ceria in soot oxidation under operando conditions
spellingShingle X-ray photoelectron and Raman spectroscopy of nanostructured ceria in soot oxidation under operando conditions
García de Andrés, Xènia|||0000-0003-0795-4168
Atomic absortion spectroscopy
Spectrum analysis
Raman spectroscopy
Ceria
Nanoshapes
Soot oxidation
NAP-X
PSAP-XPS
Raman spectroscopy
Operando characterization
Espectroscòpia d'absorció atòmica
Anàlisi espectral
Espectroscòpia Raman
Àrees temàtiques de la UPC::Energies
title_short X-ray photoelectron and Raman spectroscopy of nanostructured ceria in soot oxidation under operando conditions
title_full X-ray photoelectron and Raman spectroscopy of nanostructured ceria in soot oxidation under operando conditions
title_fullStr X-ray photoelectron and Raman spectroscopy of nanostructured ceria in soot oxidation under operando conditions
title_full_unstemmed X-ray photoelectron and Raman spectroscopy of nanostructured ceria in soot oxidation under operando conditions
title_sort X-ray photoelectron and Raman spectroscopy of nanostructured ceria in soot oxidation under operando conditions
dc.creator.none.fl_str_mv García de Andrés, Xènia|||0000-0003-0795-4168
Soler Turu, Lluís|||0000-0003-1591-3366
Casanovas Grau, Albert
Escudero, Carlos
Llorca Piqué, Jordi|||0000-0002-7447-9582
author García de Andrés, Xènia|||0000-0003-0795-4168
author_facet García de Andrés, Xènia|||0000-0003-0795-4168
Soler Turu, Lluís|||0000-0003-1591-3366
Casanovas Grau, Albert
Escudero, Carlos
Llorca Piqué, Jordi|||0000-0002-7447-9582
author_role author
author2 Soler Turu, Lluís|||0000-0003-1591-3366
Casanovas Grau, Albert
Escudero, Carlos
Llorca Piqué, Jordi|||0000-0002-7447-9582
author2_role author
author
author
author
dc.subject.none.fl_str_mv Atomic absortion spectroscopy
Spectrum analysis
Raman spectroscopy
Ceria
Nanoshapes
Soot oxidation
NAP-X
PSAP-XPS
Raman spectroscopy
Operando characterization
Espectroscòpia d'absorció atòmica
Anàlisi espectral
Espectroscòpia Raman
Àrees temàtiques de la UPC::Energies
topic Atomic absortion spectroscopy
Spectrum analysis
Raman spectroscopy
Ceria
Nanoshapes
Soot oxidation
NAP-X
PSAP-XPS
Raman spectroscopy
Operando characterization
Espectroscòpia d'absorció atòmica
Anàlisi espectral
Espectroscòpia Raman
Àrees temàtiques de la UPC::Energies
description Ceria nanoshapes exhibiting different amounts of {100}, {110} and {111} facets (cubes, rods, octahedra and polyhedra) were prepared, characterized, tested in the carbon soot oxidation reaction, and studied by operando near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) and operando Raman spectroscopy up to 550 °C. The specific soot oxidation reaction rate (mgC·m-2·min-1) clearly indicated that the {110} and {100} crystallographic planes of ceria were more active than the {111} ones for the oxidation of carbon soot. As deduced from the Ce 3d and O 1s signals recorded using different photon energies, all ceria nanoshapes experienced progressive reduction upon increasing the temperature under Ar, which was accompanied by the formation of oxygen vacancies. Raman studies revealed that, at this stage, isolated graphene layers in carbon soot reacted with ceria lattice oxygen atoms following a Mars-Van Krevelen mechanism. After exposure to O2 at 550 °C, a broad signal in the O 1s region at 531.2–532.5 eV was ascribed to surface active oxygen species, such as peroxide (O22-) and superoxide (O2-) species, generated from the interaction of molecular O2 with oxygen vacancies, which proved to be highly reactive to oxidize the graphitic structures of carbon soot.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-06-01
2022
2022-02-07
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://hdl.handle.net/2117/361755
https://dx.doi.org/10.1016/j.carbon.2021.03.009
url https://hdl.handle.net/2117/361755
https://dx.doi.org/10.1016/j.carbon.2021.03.009
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-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
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-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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