On the local order of amorphous La2Mo2O6.7

Autores
Vega Castillo, Jesus Eduardo; Buvat, Gaëtan; Corbel, Gwenaël; Kassiba, Abdelhadi; Lacorre, Philippe; Caneiro, Alberto
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The amorphous reduction product of the oxide ion conductor La2Mo2O9 was previously shown to be a good, sulphur-tolerant, anode material for solid oxide fuel cell devices (X. C. Lu, J. H. Zhu, J. Electrochem. Soc., 2008, 155(10), B1053). In this paper, we study the local order of amorphous La2Mo2O6.7 using X-ray absorption spectroscopy analyses and electronic paramagnetic resonance. The extended X-ray absorption fine structure analysis of local arrangements around Mo in La2Mo2O6.7 is first carried out on the basis of strong distortions from three crystalline models of La2Mo2O9, La7Mo7O30 and La2Mo2O7. The extended X-ray absorption fits obtained from both La2Mo2O9 and La7Mo7O30 yield similar atomic arrangements in the amorphous phase, upon large atomic displacements. However it is also possible to fit the spectrum using the paths of La2Mo2O7, in better agreement with EPR results suggesting the presence of Mo-Mo pairs. Simpler arrangements, built from theoretical single scattering paths, are considered. All models are discussed and compared. A most probable short range structure around Mo in this amorphous phase is proposed. It both fulfills EPR results and appears coherent with the presence of ionic conductivity.
Fil: Vega Castillo, Jesus Eduardo. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina. Universite Bretagne-Loire; Francia
Fil: Buvat, Gaëtan. Universite Bretagne-Loire; Francia
Fil: Corbel, Gwenaël. Universite Bretagne-Loire; Francia
Fil: Kassiba, Abdelhadi. Universite Bretagne-Loire; Francia
Fil: Lacorre, Philippe. Universite Bretagne-Loire; Francia
Fil: Caneiro, Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
Materia
Lamox
Exafs
Sofc
Anode
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/63325
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling On the local order of amorphous La2Mo2O6.7Vega Castillo, Jesus EduardoBuvat, GaëtanCorbel, GwenaëlKassiba, AbdelhadiLacorre, PhilippeCaneiro, AlbertoLamoxExafsSofcAnodehttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2The amorphous reduction product of the oxide ion conductor La2Mo2O9 was previously shown to be a good, sulphur-tolerant, anode material for solid oxide fuel cell devices (X. C. Lu, J. H. Zhu, J. Electrochem. Soc., 2008, 155(10), B1053). In this paper, we study the local order of amorphous La2Mo2O6.7 using X-ray absorption spectroscopy analyses and electronic paramagnetic resonance. The extended X-ray absorption fine structure analysis of local arrangements around Mo in La2Mo2O6.7 is first carried out on the basis of strong distortions from three crystalline models of La2Mo2O9, La7Mo7O30 and La2Mo2O7. The extended X-ray absorption fits obtained from both La2Mo2O9 and La7Mo7O30 yield similar atomic arrangements in the amorphous phase, upon large atomic displacements. However it is also possible to fit the spectrum using the paths of La2Mo2O7, in better agreement with EPR results suggesting the presence of Mo-Mo pairs. Simpler arrangements, built from theoretical single scattering paths, are considered. All models are discussed and compared. A most probable short range structure around Mo in this amorphous phase is proposed. It both fulfills EPR results and appears coherent with the presence of ionic conductivity.Fil: Vega Castillo, Jesus Eduardo. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina. Universite Bretagne-Loire; FranciaFil: Buvat, Gaëtan. Universite Bretagne-Loire; FranciaFil: Corbel, Gwenaël. Universite Bretagne-Loire; FranciaFil: Kassiba, Abdelhadi. Universite Bretagne-Loire; FranciaFil: Lacorre, Philippe. Universite Bretagne-Loire; FranciaFil: Caneiro, Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; ArgentinaRoyal Society of Chemistry2017-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/63325Vega Castillo, Jesus Eduardo; Buvat, Gaëtan; Corbel, Gwenaël; Kassiba, Abdelhadi; Lacorre, Philippe; et al.; On the local order of amorphous La2Mo2O6.7; Royal Society of Chemistry; Dalton Transactions; 46; 22; 5-2017; 7273-72831477-9226CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/content/articlelanding/2017/dt/c7dt00637cinfo:eu-repo/semantics/altIdentifier/doi/10.1039/C7DT00637Cinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:20:35Zoai:ri.conicet.gov.ar:11336/63325instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:20:35.63CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv On the local order of amorphous La2Mo2O6.7
title On the local order of amorphous La2Mo2O6.7
spellingShingle On the local order of amorphous La2Mo2O6.7
Vega Castillo, Jesus Eduardo
Lamox
Exafs
Sofc
Anode
title_short On the local order of amorphous La2Mo2O6.7
title_full On the local order of amorphous La2Mo2O6.7
title_fullStr On the local order of amorphous La2Mo2O6.7
title_full_unstemmed On the local order of amorphous La2Mo2O6.7
title_sort On the local order of amorphous La2Mo2O6.7
dc.creator.none.fl_str_mv Vega Castillo, Jesus Eduardo
Buvat, Gaëtan
Corbel, Gwenaël
Kassiba, Abdelhadi
Lacorre, Philippe
Caneiro, Alberto
author Vega Castillo, Jesus Eduardo
author_facet Vega Castillo, Jesus Eduardo
Buvat, Gaëtan
Corbel, Gwenaël
Kassiba, Abdelhadi
Lacorre, Philippe
Caneiro, Alberto
author_role author
author2 Buvat, Gaëtan
Corbel, Gwenaël
Kassiba, Abdelhadi
Lacorre, Philippe
Caneiro, Alberto
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Lamox
Exafs
Sofc
Anode
topic Lamox
Exafs
Sofc
Anode
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The amorphous reduction product of the oxide ion conductor La2Mo2O9 was previously shown to be a good, sulphur-tolerant, anode material for solid oxide fuel cell devices (X. C. Lu, J. H. Zhu, J. Electrochem. Soc., 2008, 155(10), B1053). In this paper, we study the local order of amorphous La2Mo2O6.7 using X-ray absorption spectroscopy analyses and electronic paramagnetic resonance. The extended X-ray absorption fine structure analysis of local arrangements around Mo in La2Mo2O6.7 is first carried out on the basis of strong distortions from three crystalline models of La2Mo2O9, La7Mo7O30 and La2Mo2O7. The extended X-ray absorption fits obtained from both La2Mo2O9 and La7Mo7O30 yield similar atomic arrangements in the amorphous phase, upon large atomic displacements. However it is also possible to fit the spectrum using the paths of La2Mo2O7, in better agreement with EPR results suggesting the presence of Mo-Mo pairs. Simpler arrangements, built from theoretical single scattering paths, are considered. All models are discussed and compared. A most probable short range structure around Mo in this amorphous phase is proposed. It both fulfills EPR results and appears coherent with the presence of ionic conductivity.
Fil: Vega Castillo, Jesus Eduardo. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina. Universite Bretagne-Loire; Francia
Fil: Buvat, Gaëtan. Universite Bretagne-Loire; Francia
Fil: Corbel, Gwenaël. Universite Bretagne-Loire; Francia
Fil: Kassiba, Abdelhadi. Universite Bretagne-Loire; Francia
Fil: Lacorre, Philippe. Universite Bretagne-Loire; Francia
Fil: Caneiro, Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
description The amorphous reduction product of the oxide ion conductor La2Mo2O9 was previously shown to be a good, sulphur-tolerant, anode material for solid oxide fuel cell devices (X. C. Lu, J. H. Zhu, J. Electrochem. Soc., 2008, 155(10), B1053). In this paper, we study the local order of amorphous La2Mo2O6.7 using X-ray absorption spectroscopy analyses and electronic paramagnetic resonance. The extended X-ray absorption fine structure analysis of local arrangements around Mo in La2Mo2O6.7 is first carried out on the basis of strong distortions from three crystalline models of La2Mo2O9, La7Mo7O30 and La2Mo2O7. The extended X-ray absorption fits obtained from both La2Mo2O9 and La7Mo7O30 yield similar atomic arrangements in the amorphous phase, upon large atomic displacements. However it is also possible to fit the spectrum using the paths of La2Mo2O7, in better agreement with EPR results suggesting the presence of Mo-Mo pairs. Simpler arrangements, built from theoretical single scattering paths, are considered. All models are discussed and compared. A most probable short range structure around Mo in this amorphous phase is proposed. It both fulfills EPR results and appears coherent with the presence of ionic conductivity.
publishDate 2017
dc.date.none.fl_str_mv 2017-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/63325
Vega Castillo, Jesus Eduardo; Buvat, Gaëtan; Corbel, Gwenaël; Kassiba, Abdelhadi; Lacorre, Philippe; et al.; On the local order of amorphous La2Mo2O6.7; Royal Society of Chemistry; Dalton Transactions; 46; 22; 5-2017; 7273-7283
1477-9226
CONICET Digital
CONICET
url http://hdl.handle.net/11336/63325
identifier_str_mv Vega Castillo, Jesus Eduardo; Buvat, Gaëtan; Corbel, Gwenaël; Kassiba, Abdelhadi; Lacorre, Philippe; et al.; On the local order of amorphous La2Mo2O6.7; Royal Society of Chemistry; Dalton Transactions; 46; 22; 5-2017; 7273-7283
1477-9226
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/content/articlelanding/2017/dt/c7dt00637c
info:eu-repo/semantics/altIdentifier/doi/10.1039/C7DT00637C
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Royal Society of Chemistry
publisher.none.fl_str_mv Royal Society of Chemistry
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.22299

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