Characterization of (La,Sr)(Ti,Co)O3 Oxides for Symmetrical Solid Oxide Fuel Cell Electrodes

Autores
Napolitano, Federico Ricardo; Soldati, Analía Leticia; Geck, Jochen; Suescun, Leopoldo; Acuña, Leandro Marcelo; Fernandez Zuvich, Afra; Lamas, Diego German; Serquis, Adriana Cristina
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this work, a combined synchrotron X-ray diffraction (XPD), X-ray absorption near edge spectroscopy (XANES) and Extended X-ray Absorption Fine Structure (EXAFS) study of La0.4Sr0.6Ti1-yCoyO3±δ (0 ≤ y ≤ 0.5), intended as symmetric solid oxide fuel cells electrode, is presented. Charge compensation mechanisms were characterized by room temperature measurements; LSTC has a perovskite pseudocubic structure with an A-site vacancy concentration related with Co doping level. This result seems to be triggered by the fact that Ti remains in a higher formal valence (around 4+) independent of the Co concentrations. On the contrary, Co K-edge XANES spectra show a dependency with the doping level but this seems to be related to structural changes. In-situ measurements simulating a symmetric SOFC working environment show that LSTC undergoes a rhombohedral to cubic perovskite phase transition with critical temperature dependent of the structural distortion level.
Fil: Napolitano, Federico Ricardo. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
Fil: Soldati, Analía Leticia. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
Fil: Geck, Jochen. Leibniz Institute for Solid State and Materials Research IFW; Alemania
Fil: Suescun, Leopoldo. Universidad de la Republica. Facultad de Química; Uruguay
Fil: Acuña, Leandro Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas. Centro de Investigaciones en Sólidos; Argentina
Fil: Fernandez Zuvich, Afra. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
Fil: Lamas, Diego German. Universidad Nacional del Comahue. Facultad de Ingeniería; Argentina
Fil: Serquis, Adriana Cristina. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
Materia
Sofc
Symmetrical Electrodes
Lstc
In-Situ Xpd
Xas
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:11336/21379
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/21379
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Characterization of (La,Sr)(Ti,Co)O3 Oxides for Symmetrical Solid Oxide Fuel Cell ElectrodesNapolitano, Federico RicardoSoldati, Analía LeticiaGeck, JochenSuescun, LeopoldoAcuña, Leandro MarceloFernandez Zuvich, AfraLamas, Diego GermanSerquis, Adriana CristinaSofcSymmetrical ElectrodesLstcIn-Situ XpdXashttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1In this work, a combined synchrotron X-ray diffraction (XPD), X-ray absorption near edge spectroscopy (XANES) and Extended X-ray Absorption Fine Structure (EXAFS) study of La0.4Sr0.6Ti1-yCoyO3±δ (0 ≤ y ≤ 0.5), intended as symmetric solid oxide fuel cells electrode, is presented. Charge compensation mechanisms were characterized by room temperature measurements; LSTC has a perovskite pseudocubic structure with an A-site vacancy concentration related with Co doping level. This result seems to be triggered by the fact that Ti remains in a higher formal valence (around 4+) independent of the Co concentrations. On the contrary, Co K-edge XANES spectra show a dependency with the doping level but this seems to be related to structural changes. In-situ measurements simulating a symmetric SOFC working environment show that LSTC undergoes a rhombohedral to cubic perovskite phase transition with critical temperature dependent of the structural distortion level.Fil: Napolitano, Federico Ricardo. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; ArgentinaFil: Soldati, Analía Leticia. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; ArgentinaFil: Geck, Jochen. Leibniz Institute for Solid State and Materials Research IFW; AlemaniaFil: Suescun, Leopoldo. Universidad de la Republica. Facultad de Química; UruguayFil: Acuña, Leandro Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas. Centro de Investigaciones en Sólidos; ArgentinaFil: Fernandez Zuvich, Afra. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; ArgentinaFil: Lamas, Diego German. Universidad Nacional del Comahue. Facultad de Ingeniería; ArgentinaFil: Serquis, Adriana Cristina. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; ArgentinaThe Electrochemical Society2013-10-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/21379Napolitano, Federico Ricardo; Soldati, Analía Leticia; Geck, Jochen; Suescun, Leopoldo; Acuña, Leandro Marcelo; et al.; Characterization of (La,Sr)(Ti,Co)O3 Oxides for Symmetrical Solid Oxide Fuel Cell Electrodes; The Electrochemical Society; ECS Transactions; 58; 3; 30-10-2013; 185-1931938-6737CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1149/05803.0185ecstinfo:eu-repo/semantics/altIdentifier/url/http://ecst.ecsdl.org/content/58/3/185.abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:33:55Zoai:ri.conicet.gov.ar:11336/21379instacron: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:34982025-09-29 09:33:56.011CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Characterization of (La,Sr)(Ti,Co)O3 Oxides for Symmetrical Solid Oxide Fuel Cell Electrodes
title Characterization of (La,Sr)(Ti,Co)O3 Oxides for Symmetrical Solid Oxide Fuel Cell Electrodes
spellingShingle Characterization of (La,Sr)(Ti,Co)O3 Oxides for Symmetrical Solid Oxide Fuel Cell Electrodes
Napolitano, Federico Ricardo
Sofc
Symmetrical Electrodes
Lstc
In-Situ Xpd
Xas
title_short Characterization of (La,Sr)(Ti,Co)O3 Oxides for Symmetrical Solid Oxide Fuel Cell Electrodes
title_full Characterization of (La,Sr)(Ti,Co)O3 Oxides for Symmetrical Solid Oxide Fuel Cell Electrodes
title_fullStr Characterization of (La,Sr)(Ti,Co)O3 Oxides for Symmetrical Solid Oxide Fuel Cell Electrodes
title_full_unstemmed Characterization of (La,Sr)(Ti,Co)O3 Oxides for Symmetrical Solid Oxide Fuel Cell Electrodes
title_sort Characterization of (La,Sr)(Ti,Co)O3 Oxides for Symmetrical Solid Oxide Fuel Cell Electrodes
dc.creator.none.fl_str_mv Napolitano, Federico Ricardo
Soldati, Analía Leticia
Geck, Jochen
Suescun, Leopoldo
Acuña, Leandro Marcelo
Fernandez Zuvich, Afra
Lamas, Diego German
Serquis, Adriana Cristina
author Napolitano, Federico Ricardo
author_facet Napolitano, Federico Ricardo
Soldati, Analía Leticia
Geck, Jochen
Suescun, Leopoldo
Acuña, Leandro Marcelo
Fernandez Zuvich, Afra
Lamas, Diego German
Serquis, Adriana Cristina
author_role author
author2 Soldati, Analía Leticia
Geck, Jochen
Suescun, Leopoldo
Acuña, Leandro Marcelo
Fernandez Zuvich, Afra
Lamas, Diego German
Serquis, Adriana Cristina
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Sofc
Symmetrical Electrodes
Lstc
In-Situ Xpd
Xas
topic Sofc
Symmetrical Electrodes
Lstc
In-Situ Xpd
Xas
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In this work, a combined synchrotron X-ray diffraction (XPD), X-ray absorption near edge spectroscopy (XANES) and Extended X-ray Absorption Fine Structure (EXAFS) study of La0.4Sr0.6Ti1-yCoyO3±δ (0 ≤ y ≤ 0.5), intended as symmetric solid oxide fuel cells electrode, is presented. Charge compensation mechanisms were characterized by room temperature measurements; LSTC has a perovskite pseudocubic structure with an A-site vacancy concentration related with Co doping level. This result seems to be triggered by the fact that Ti remains in a higher formal valence (around 4+) independent of the Co concentrations. On the contrary, Co K-edge XANES spectra show a dependency with the doping level but this seems to be related to structural changes. In-situ measurements simulating a symmetric SOFC working environment show that LSTC undergoes a rhombohedral to cubic perovskite phase transition with critical temperature dependent of the structural distortion level.
Fil: Napolitano, Federico Ricardo. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
Fil: Soldati, Analía Leticia. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
Fil: Geck, Jochen. Leibniz Institute for Solid State and Materials Research IFW; Alemania
Fil: Suescun, Leopoldo. Universidad de la Republica. Facultad de Química; Uruguay
Fil: Acuña, Leandro Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas. Centro de Investigaciones en Sólidos; Argentina
Fil: Fernandez Zuvich, Afra. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
Fil: Lamas, Diego German. Universidad Nacional del Comahue. Facultad de Ingeniería; Argentina
Fil: Serquis, Adriana Cristina. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
description In this work, a combined synchrotron X-ray diffraction (XPD), X-ray absorption near edge spectroscopy (XANES) and Extended X-ray Absorption Fine Structure (EXAFS) study of La0.4Sr0.6Ti1-yCoyO3±δ (0 ≤ y ≤ 0.5), intended as symmetric solid oxide fuel cells electrode, is presented. Charge compensation mechanisms were characterized by room temperature measurements; LSTC has a perovskite pseudocubic structure with an A-site vacancy concentration related with Co doping level. This result seems to be triggered by the fact that Ti remains in a higher formal valence (around 4+) independent of the Co concentrations. On the contrary, Co K-edge XANES spectra show a dependency with the doping level but this seems to be related to structural changes. In-situ measurements simulating a symmetric SOFC working environment show that LSTC undergoes a rhombohedral to cubic perovskite phase transition with critical temperature dependent of the structural distortion level.
publishDate 2013
dc.date.none.fl_str_mv 2013-10-30
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/11336/21379
Napolitano, Federico Ricardo; Soldati, Analía Leticia; Geck, Jochen; Suescun, Leopoldo; Acuña, Leandro Marcelo; et al.; Characterization of (La,Sr)(Ti,Co)O3 Oxides for Symmetrical Solid Oxide Fuel Cell Electrodes; The Electrochemical Society; ECS Transactions; 58; 3; 30-10-2013; 185-193
1938-6737
CONICET Digital
CONICET
url http://hdl.handle.net/11336/21379
identifier_str_mv Napolitano, Federico Ricardo; Soldati, Analía Leticia; Geck, Jochen; Suescun, Leopoldo; Acuña, Leandro Marcelo; et al.; Characterization of (La,Sr)(Ti,Co)O3 Oxides for Symmetrical Solid Oxide Fuel Cell Electrodes; The Electrochemical Society; ECS Transactions; 58; 3; 30-10-2013; 185-193
1938-6737
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1149/05803.0185ecst
info:eu-repo/semantics/altIdentifier/url/http://ecst.ecsdl.org/content/58/3/185.abstract
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 The Electrochemical Society
publisher.none.fl_str_mv The Electrochemical Society
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 13.070432

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