Electronic and structural properties of La0.4Sr0.6Ti1-yCoyO3±d electrode materials for symmetric SOFC studied by hard X-ray Absorption Spectroscopy

Autores
Napolitano, Federico Ricardo; Soldati, Analía Leticia; Geck, Jochen; Lamas, Diego German; Serquis, Adriana Cristina
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present combined Synchrotron X-ray Absorption Near Edge Spectroscopy (XANES) and
Extended X-ray Absorption Fine Structure (EXAFS) study of La0.4Sr0.6Ti1yCoyO3d
(0 <=y <= 0.5), which are promising electrode materials for symmetric solid oxide fuel cells.
The measurements were performed at room temperature at the Ti and the Co K-edges in
order to determine the local structural and electronic changes around the two transition
metals. We find that Ti remains in a higher formal valence (around 4þ) independent of the
Co concentration. In contrast to this, dramatic and systematic changes are observed for the
Co as a function of y.We conclude that the stability of the Ti4þ triggers the A-site deficiency
in our samples and predicts that oxygen vacancies are much more easily formed at large
Co content, which in turn will greatly enhance the performance as electrode material.
Fil: Napolitano, Federico Ricardo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Soldati, Analía Leticia. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Geck, Jochen. Leibinz. Institute for Solid State and Materials Research; Alemania
Fil: Lamas, Diego German. Universidad Nacional del Comahue; Argentina
Fil: Serquis, Adriana Cristina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Materia
Itsofc
Xanes
Xpd
Electrodo Simetrico
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/17933
Acceder
id CONICETDig_300cd9b6bd7ff16ddf49967461c9a0e1
oai_identifier_str oai:ri.conicet.gov.ar:11336/17933
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Electronic and structural properties of La0.4Sr0.6Ti1-yCoyO3±d electrode materials for symmetric SOFC studied by hard X-ray Absorption SpectroscopyNapolitano, Federico RicardoSoldati, Analía LeticiaGeck, JochenLamas, Diego GermanSerquis, Adriana CristinaItsofcXanesXpdElectrodo Simetricohttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2We present combined Synchrotron X-ray Absorption Near Edge Spectroscopy (XANES) and<br />Extended X-ray Absorption Fine Structure (EXAFS) study of La0.4Sr0.6Ti1yCoyO3d<br />(0 <=y <= 0.5), which are promising electrode materials for symmetric solid oxide fuel cells.<br />The measurements were performed at room temperature at the Ti and the Co K-edges in<br />order to determine the local structural and electronic changes around the two transition<br />metals. We find that Ti remains in a higher formal valence (around 4þ) independent of the<br />Co concentration. In contrast to this, dramatic and systematic changes are observed for the<br />Co as a function of y.We conclude that the stability of the Ti4þ triggers the A-site deficiency<br />in our samples and predicts that oxygen vacancies are much more easily formed at large<br />Co content, which in turn will greatly enhance the performance as electrode material.Fil: Napolitano, Federico Ricardo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaFil: Soldati, Analía Leticia. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaFil: Geck, Jochen. Leibinz. Institute for Solid State and Materials Research; AlemaniaFil: Lamas, Diego German. Universidad Nacional del Comahue; ArgentinaFil: Serquis, Adriana Cristina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaPergamon-elsevier Science Ltd2013-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/17933Napolitano, Federico Ricardo; Soldati, Analía Leticia; Geck, Jochen; Lamas, Diego German; Serquis, Adriana Cristina; Electronic and structural properties of La0.4Sr0.6Ti1-yCoyO3±d electrode materials for symmetric SOFC studied by hard X-ray Absorption Spectroscopy; Pergamon-elsevier Science Ltd; International Journal of Hydrogen Energy; 38; 5-2013; 8965-89730360-3199enginfo:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.ijhydene.2013.05.005info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0360319913011403info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:22:28Zoai:ri.conicet.gov.ar:11336/17933instacron: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:34982025-09-10 13:22:29.041CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Electronic and structural properties of La0.4Sr0.6Ti1-yCoyO3±d electrode materials for symmetric SOFC studied by hard X-ray Absorption Spectroscopy
title Electronic and structural properties of La0.4Sr0.6Ti1-yCoyO3±d electrode materials for symmetric SOFC studied by hard X-ray Absorption Spectroscopy
spellingShingle Electronic and structural properties of La0.4Sr0.6Ti1-yCoyO3±d electrode materials for symmetric SOFC studied by hard X-ray Absorption Spectroscopy
Napolitano, Federico Ricardo
Itsofc
Xanes
Xpd
Electrodo Simetrico
title_short Electronic and structural properties of La0.4Sr0.6Ti1-yCoyO3±d electrode materials for symmetric SOFC studied by hard X-ray Absorption Spectroscopy
title_full Electronic and structural properties of La0.4Sr0.6Ti1-yCoyO3±d electrode materials for symmetric SOFC studied by hard X-ray Absorption Spectroscopy
title_fullStr Electronic and structural properties of La0.4Sr0.6Ti1-yCoyO3±d electrode materials for symmetric SOFC studied by hard X-ray Absorption Spectroscopy
title_full_unstemmed Electronic and structural properties of La0.4Sr0.6Ti1-yCoyO3±d electrode materials for symmetric SOFC studied by hard X-ray Absorption Spectroscopy
title_sort Electronic and structural properties of La0.4Sr0.6Ti1-yCoyO3±d electrode materials for symmetric SOFC studied by hard X-ray Absorption Spectroscopy
dc.creator.none.fl_str_mv Napolitano, Federico Ricardo
Soldati, Analía Leticia
Geck, Jochen
Lamas, Diego German
Serquis, Adriana Cristina
author Napolitano, Federico Ricardo
author_facet Napolitano, Federico Ricardo
Soldati, Analía Leticia
Geck, Jochen
Lamas, Diego German
Serquis, Adriana Cristina
author_role author
author2 Soldati, Analía Leticia
Geck, Jochen
Lamas, Diego German
Serquis, Adriana Cristina
author2_role author
author
author
author
dc.subject.none.fl_str_mv Itsofc
Xanes
Xpd
Electrodo Simetrico
topic Itsofc
Xanes
Xpd
Electrodo Simetrico
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv We present combined Synchrotron X-ray Absorption Near Edge Spectroscopy (XANES) and<br />Extended X-ray Absorption Fine Structure (EXAFS) study of La0.4Sr0.6Ti1yCoyO3d<br />(0 <=y <= 0.5), which are promising electrode materials for symmetric solid oxide fuel cells.<br />The measurements were performed at room temperature at the Ti and the Co K-edges in<br />order to determine the local structural and electronic changes around the two transition<br />metals. We find that Ti remains in a higher formal valence (around 4þ) independent of the<br />Co concentration. In contrast to this, dramatic and systematic changes are observed for the<br />Co as a function of y.We conclude that the stability of the Ti4þ triggers the A-site deficiency<br />in our samples and predicts that oxygen vacancies are much more easily formed at large<br />Co content, which in turn will greatly enhance the performance as electrode material.
Fil: Napolitano, Federico Ricardo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Soldati, Analía Leticia. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Geck, Jochen. Leibinz. Institute for Solid State and Materials Research; Alemania
Fil: Lamas, Diego German. Universidad Nacional del Comahue; Argentina
Fil: Serquis, Adriana Cristina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
description We present combined Synchrotron X-ray Absorption Near Edge Spectroscopy (XANES) and<br />Extended X-ray Absorption Fine Structure (EXAFS) study of La0.4Sr0.6Ti1yCoyO3d<br />(0 <=y <= 0.5), which are promising electrode materials for symmetric solid oxide fuel cells.<br />The measurements were performed at room temperature at the Ti and the Co K-edges in<br />order to determine the local structural and electronic changes around the two transition<br />metals. We find that Ti remains in a higher formal valence (around 4þ) independent of the<br />Co concentration. In contrast to this, dramatic and systematic changes are observed for the<br />Co as a function of y.We conclude that the stability of the Ti4þ triggers the A-site deficiency<br />in our samples and predicts that oxygen vacancies are much more easily formed at large<br />Co content, which in turn will greatly enhance the performance as electrode material.
publishDate 2013
dc.date.none.fl_str_mv 2013-05
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/11336/17933
Napolitano, Federico Ricardo; Soldati, Analía Leticia; Geck, Jochen; Lamas, Diego German; Serquis, Adriana Cristina; Electronic and structural properties of La0.4Sr0.6Ti1-yCoyO3±d electrode materials for symmetric SOFC studied by hard X-ray Absorption Spectroscopy; Pergamon-elsevier Science Ltd; International Journal of Hydrogen Energy; 38; 5-2013; 8965-8973
0360-3199
url http://hdl.handle.net/11336/17933
identifier_str_mv Napolitano, Federico Ricardo; Soldati, Analía Leticia; Geck, Jochen; Lamas, Diego German; Serquis, Adriana Cristina; Electronic and structural properties of La0.4Sr0.6Ti1-yCoyO3±d electrode materials for symmetric SOFC studied by hard X-ray Absorption Spectroscopy; Pergamon-elsevier Science Ltd; International Journal of Hydrogen Energy; 38; 5-2013; 8965-8973
0360-3199
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.ijhydene.2013.05.005
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0360319913011403
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Pergamon-elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-elsevier Science Ltd
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 12.48226

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