X-ray photoelectron spectroscopy (XPS) study of surface oxidation of UO2 doped with Gd2O3 at different temperatures and atmospheres

In this work, the influence of GdIII doping on the surface oxidation of UO2 has been investigated in situ by XPS. The samples were put in contact with either hydrogen, argon or synthetic air streams saturated with water and were heated at different temperatures (60, 200 and 350 °C). The results indi...

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Autores: García Gómez, Sonia|||0000-0002-9339-5405, Giménez Izquierdo, Francisco Javier|||0000-0003-2094-4458, Casas Pons, Ignasi|||0000-0002-5419-1645, Llorca Piqué, Jordi|||0000-0002-7447-9582, Pablo Ribas, Joan de|||0000-0001-9538-7321
Formato: artículo
Fecha de publicación:2023
País:España
Recursos:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/396870
Acesso em linha:https://hdl.handle.net/2117/396870
https://dx.doi.org/10.1016/j.apsusc.2023.157429
Access Level:acceso abierto
Palavra-chave:Photoelectron spectroscopy
Oxidation
UO2 surface oxidation
Gd2O3-doping
X-ray photoelectron spectroscopy
Water vapour
Porosity
Espectroscòpia fotoelèctrica
Oxidació
Àrees temàtiques de la UPC::Enginyeria química
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spelling X-ray photoelectron spectroscopy (XPS) study of surface oxidation of UO2 doped with Gd2O3 at different temperatures and atmospheresGarcía Gómez, Sonia|||0000-0002-9339-5405Giménez Izquierdo, Francisco Javier|||0000-0003-2094-4458Casas Pons, Ignasi|||0000-0002-5419-1645Llorca Piqué, Jordi|||0000-0002-7447-9582Pablo Ribas, Joan de|||0000-0001-9538-7321Photoelectron spectroscopyOxidationUO2 surface oxidationGd2O3-dopingX-ray photoelectron spectroscopyWater vapourPorosityEspectroscòpia fotoelèctricaOxidacióÀrees temàtiques de la UPC::Enginyeria químicaIn this work, the influence of GdIII doping on the surface oxidation of UO2 has been investigated in situ by XPS. The samples were put in contact with either hydrogen, argon or synthetic air streams saturated with water and were heated at different temperatures (60, 200 and 350 °C). The results indicated that, in absence of porosity, doping UO2 with Gd2O3 completely inhibited the oxidation of UO2. Such behaviour could be explained by the matrix stabilization effect of gadolinia (Gd2O3). However, for porous samples, the oxidation of UO2 in presence of Gd2O3 depends strongly on the surrounding gas atmosphere. In presence of hydrogen, the oxidation was significantly supressed, particularly above 200 °C, due to the hydrogen reducing effect. At 350 °C and in the presence of argon, the reactivity of the samples increased slightly when comparing to H2, whereas in contact with synthetic air, the complete oxidation of the samples could not be prevented by Gd2O3. These results could be explained by assuming that the porosity might favour the oxidation of the samples. Therefore, the presence of porosity in the samples is an important parameter to consider when studying the surface oxidation of UO2 doped with Gd2O3.Peer Reviewed20232023-08-0120232023-11-22journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/396870https://dx.doi.org/10.1016/j.apsusc.2023.157429reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3968702026-05-27T15:37:01Z
dc.title.none.fl_str_mv X-ray photoelectron spectroscopy (XPS) study of surface oxidation of UO2 doped with Gd2O3 at different temperatures and atmospheres
title X-ray photoelectron spectroscopy (XPS) study of surface oxidation of UO2 doped with Gd2O3 at different temperatures and atmospheres
spellingShingle X-ray photoelectron spectroscopy (XPS) study of surface oxidation of UO2 doped with Gd2O3 at different temperatures and atmospheres
García Gómez, Sonia|||0000-0002-9339-5405
Photoelectron spectroscopy
Oxidation
UO2 surface oxidation
Gd2O3-doping
X-ray photoelectron spectroscopy
Water vapour
Porosity
Espectroscòpia fotoelèctrica
Oxidació
Àrees temàtiques de la UPC::Enginyeria química
title_short X-ray photoelectron spectroscopy (XPS) study of surface oxidation of UO2 doped with Gd2O3 at different temperatures and atmospheres
title_full X-ray photoelectron spectroscopy (XPS) study of surface oxidation of UO2 doped with Gd2O3 at different temperatures and atmospheres
title_fullStr X-ray photoelectron spectroscopy (XPS) study of surface oxidation of UO2 doped with Gd2O3 at different temperatures and atmospheres
title_full_unstemmed X-ray photoelectron spectroscopy (XPS) study of surface oxidation of UO2 doped with Gd2O3 at different temperatures and atmospheres
title_sort X-ray photoelectron spectroscopy (XPS) study of surface oxidation of UO2 doped with Gd2O3 at different temperatures and atmospheres
dc.creator.none.fl_str_mv García Gómez, Sonia|||0000-0002-9339-5405
Giménez Izquierdo, Francisco Javier|||0000-0003-2094-4458
Casas Pons, Ignasi|||0000-0002-5419-1645
Llorca Piqué, Jordi|||0000-0002-7447-9582
Pablo Ribas, Joan de|||0000-0001-9538-7321
author García Gómez, Sonia|||0000-0002-9339-5405
author_facet García Gómez, Sonia|||0000-0002-9339-5405
Giménez Izquierdo, Francisco Javier|||0000-0003-2094-4458
Casas Pons, Ignasi|||0000-0002-5419-1645
Llorca Piqué, Jordi|||0000-0002-7447-9582
Pablo Ribas, Joan de|||0000-0001-9538-7321
author_role author
author2 Giménez Izquierdo, Francisco Javier|||0000-0003-2094-4458
Casas Pons, Ignasi|||0000-0002-5419-1645
Llorca Piqué, Jordi|||0000-0002-7447-9582
Pablo Ribas, Joan de|||0000-0001-9538-7321
author2_role author
author
author
author
dc.subject.none.fl_str_mv Photoelectron spectroscopy
Oxidation
UO2 surface oxidation
Gd2O3-doping
X-ray photoelectron spectroscopy
Water vapour
Porosity
Espectroscòpia fotoelèctrica
Oxidació
Àrees temàtiques de la UPC::Enginyeria química
topic Photoelectron spectroscopy
Oxidation
UO2 surface oxidation
Gd2O3-doping
X-ray photoelectron spectroscopy
Water vapour
Porosity
Espectroscòpia fotoelèctrica
Oxidació
Àrees temàtiques de la UPC::Enginyeria química
description In this work, the influence of GdIII doping on the surface oxidation of UO2 has been investigated in situ by XPS. The samples were put in contact with either hydrogen, argon or synthetic air streams saturated with water and were heated at different temperatures (60, 200 and 350 °C). The results indicated that, in absence of porosity, doping UO2 with Gd2O3 completely inhibited the oxidation of UO2. Such behaviour could be explained by the matrix stabilization effect of gadolinia (Gd2O3). However, for porous samples, the oxidation of UO2 in presence of Gd2O3 depends strongly on the surrounding gas atmosphere. In presence of hydrogen, the oxidation was significantly supressed, particularly above 200 °C, due to the hydrogen reducing effect. At 350 °C and in the presence of argon, the reactivity of the samples increased slightly when comparing to H2, whereas in contact with synthetic air, the complete oxidation of the samples could not be prevented by Gd2O3. These results could be explained by assuming that the porosity might favour the oxidation of the samples. Therefore, the presence of porosity in the samples is an important parameter to consider when studying the surface oxidation of UO2 doped with Gd2O3.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023-08-01
2023
2023-11-22
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/2117/396870
https://dx.doi.org/10.1016/j.apsusc.2023.157429
url https://hdl.handle.net/2117/396870
https://dx.doi.org/10.1016/j.apsusc.2023.157429
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-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/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-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
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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score 15.301629

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