Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes

Autores
Soldati, Analía Leticia; Baque, Laura Cecilia; Napolitano, Federico Ricardo; Serquis, Adriana Cristina
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Nano-sized La0.4Sr0.6Co0.8Fe0.2O3−δ (LSCF) perovskite samples (prepared by a conventional acetate route and a novel acetate synthesis with HMTA additives), were tested simulating a red–ox cycle. The crystallography was studied by X-ray Powder Diffraction (XPD) and the changes in the oxidation state of the perovskite B-site were evaluated by synchrotron X-ray Absorption Near Edge Spectroscopy (XANES). After a reducing treatment, LSFC particles show the appearance of a new phase that coexists with the original one. The structural change is accompanied by a Co and Fe formal oxidation states decrease, although Fe remains always closer to 4+ and Co closer to 3+. The treatment produces a B-site valence average reduction from 3.52+ to 3.26+ and the formation of oxygen vacancies. A re-oxidation treatment under O2 rich atmosphere at 800 °C for 10 h shows that the change is reversible and independent of the two chemical methods used to synthesize the LSCF nano-particles.
Fil: Soldati, Analía Leticia. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Baque, Laura Cecilia. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Napolitano, Federico Ricardo. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Serquis, Adriana Cristina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Lscf Cathodes
Perovskite
B-Site
Xanes
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:11336/11011
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/11011
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodesSoldati, Analía LeticiaBaque, Laura CeciliaNapolitano, Federico RicardoSerquis, Adriana CristinaLscf CathodesPerovskiteB-SiteXaneshttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2https://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Nano-sized La0.4Sr0.6Co0.8Fe0.2O3−δ (LSCF) perovskite samples (prepared by a conventional acetate route and a novel acetate synthesis with HMTA additives), were tested simulating a red–ox cycle. The crystallography was studied by X-ray Powder Diffraction (XPD) and the changes in the oxidation state of the perovskite B-site were evaluated by synchrotron X-ray Absorption Near Edge Spectroscopy (XANES). After a reducing treatment, LSFC particles show the appearance of a new phase that coexists with the original one. The structural change is accompanied by a Co and Fe formal oxidation states decrease, although Fe remains always closer to 4+ and Co closer to 3+. The treatment produces a B-site valence average reduction from 3.52+ to 3.26+ and the formation of oxygen vacancies. A re-oxidation treatment under O2 rich atmosphere at 800 °C for 10 h shows that the change is reversible and independent of the two chemical methods used to synthesize the LSCF nano-particles.Fil: Soldati, Analía Leticia. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Baque, Laura Cecilia. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Napolitano, Federico Ricardo. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Serquis, Adriana Cristina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaElsevier Science2013-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/zipapplication/pdfhttp://hdl.handle.net/11336/11011Soldati, Analía Leticia; Baque, Laura Cecilia; Napolitano, Federico Ricardo; Serquis, Adriana Cristina; Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes; Elsevier Science; Journal of Solid State Chemistry; 198; 2-2013; 253-2610022-4596enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0022459612006664info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jssc.2012.10.019info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:38:41Zoai:ri.conicet.gov.ar:11336/11011instacron: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 14:38:41.664CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes
title Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes
spellingShingle Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes
Soldati, Analía Leticia
Lscf Cathodes
Perovskite
B-Site
Xanes
title_short Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes
title_full Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes
title_fullStr Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes
title_full_unstemmed Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes
title_sort Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes
dc.creator.none.fl_str_mv Soldati, Analía Leticia
Baque, Laura Cecilia
Napolitano, Federico Ricardo
Serquis, Adriana Cristina
author Soldati, Analía Leticia
author_facet Soldati, Analía Leticia
Baque, Laura Cecilia
Napolitano, Federico Ricardo
Serquis, Adriana Cristina
author_role author
author2 Baque, Laura Cecilia
Napolitano, Federico Ricardo
Serquis, Adriana Cristina
author2_role author
author
author
dc.subject.none.fl_str_mv Lscf Cathodes
Perovskite
B-Site
Xanes
topic Lscf Cathodes
Perovskite
B-Site
Xanes
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Nano-sized La0.4Sr0.6Co0.8Fe0.2O3−δ (LSCF) perovskite samples (prepared by a conventional acetate route and a novel acetate synthesis with HMTA additives), were tested simulating a red–ox cycle. The crystallography was studied by X-ray Powder Diffraction (XPD) and the changes in the oxidation state of the perovskite B-site were evaluated by synchrotron X-ray Absorption Near Edge Spectroscopy (XANES). After a reducing treatment, LSFC particles show the appearance of a new phase that coexists with the original one. The structural change is accompanied by a Co and Fe formal oxidation states decrease, although Fe remains always closer to 4+ and Co closer to 3+. The treatment produces a B-site valence average reduction from 3.52+ to 3.26+ and the formation of oxygen vacancies. A re-oxidation treatment under O2 rich atmosphere at 800 °C for 10 h shows that the change is reversible and independent of the two chemical methods used to synthesize the LSCF nano-particles.
Fil: Soldati, Analía Leticia. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Baque, Laura Cecilia. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Napolitano, Federico Ricardo. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Serquis, Adriana Cristina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Nano-sized La0.4Sr0.6Co0.8Fe0.2O3−δ (LSCF) perovskite samples (prepared by a conventional acetate route and a novel acetate synthesis with HMTA additives), were tested simulating a red–ox cycle. The crystallography was studied by X-ray Powder Diffraction (XPD) and the changes in the oxidation state of the perovskite B-site were evaluated by synchrotron X-ray Absorption Near Edge Spectroscopy (XANES). After a reducing treatment, LSFC particles show the appearance of a new phase that coexists with the original one. The structural change is accompanied by a Co and Fe formal oxidation states decrease, although Fe remains always closer to 4+ and Co closer to 3+. The treatment produces a B-site valence average reduction from 3.52+ to 3.26+ and the formation of oxygen vacancies. A re-oxidation treatment under O2 rich atmosphere at 800 °C for 10 h shows that the change is reversible and independent of the two chemical methods used to synthesize the LSCF nano-particles.
publishDate 2013
dc.date.none.fl_str_mv 2013-02
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/11336/11011
Soldati, Analía Leticia; Baque, Laura Cecilia; Napolitano, Federico Ricardo; Serquis, Adriana Cristina; Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes; Elsevier Science; Journal of Solid State Chemistry; 198; 2-2013; 253-261
0022-4596
url http://hdl.handle.net/11336/11011
identifier_str_mv Soldati, Analía Leticia; Baque, Laura Cecilia; Napolitano, Federico Ricardo; Serquis, Adriana Cristina; Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes; Elsevier Science; Journal of Solid State Chemistry; 198; 2-2013; 253-261
0022-4596
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0022459612006664
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jssc.2012.10.019
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/zip
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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
_version_ 1846082867390578688
score 13.22299

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