Highly active La0.4Sr0.6Co0.8Fe0.2O3−δ nanocatalyst for oxygen reduction in intermediate temperature-solid oxide fuel cells

Autores
Chanquia, Corina Mercedes; Mogni, Liliana Verónica; Troiani, Horacio Esteban; Caneiro, Alberto
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Pure-phase La0.4Sr0.6Co0.8Fe0.2O3−δ (LSCF) nanocrystallites were successfully synthesized by the combustion method, by employing glycine as fuel and complexing agent, and ammonium nitrate as combustion trigger. The morphological and structural characterization of the LSCF nanopowders was performed by using X-ray diffraction, N2 physisorption and electron microscopy. The LSCF nanopowder consists of interconnected nanocrystallites (∼45 nm) forming a sponge-like structure with meso and macropores, being its specific surface area around 10 m2 g−1. Crystalline structural analyses show that the LSCF nanopowder presents cubic symmetry in the Pm-3m space group. By employing the spin coating technique and different thermal treatments, symmetrical cells with different electrode crystallite size (45 and 685 nm) were built, by using La0.8Sr0.2Ga0.8Mg0.2O3−δ as electrolyte. Electrochemical impedance spectroscopy measurements were performed varying temperature and pO2. The area specific resistance of the nanostructured sample (45 nm) decreases by two orders of magnitude with respect to the submicrostructured sample (685 nm), reaching values as low as 0.8 Ω cm2 at 450 °C. This improvement is attributed to the cathode morphology optimization in the nanoscale, i.e., enlargement of the exposed surface area and shortening of the oxygen diffusion paths, which reduce the polarization resistance associated to the surface exchange and O-ion bulk diffusion process.
Fil: Chanquia, Corina Mercedes. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Troiani, Horacio Esteban. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Caneiro, Alberto. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Combustion Synthesis
Nanocrystallites
La0.4sr0.6co0.8fe0.2o3-D
Solid Oxide Fuel Cell
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:11336/34363
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/34363
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Highly active La0.4Sr0.6Co0.8Fe0.2O3−δ nanocatalyst for oxygen reduction in intermediate temperature-solid oxide fuel cellsChanquia, Corina MercedesMogni, Liliana VerónicaTroiani, Horacio EstebanCaneiro, AlbertoCombustion SynthesisNanocrystallitesLa0.4sr0.6co0.8fe0.2o3-DSolid Oxide Fuel Cellhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Pure-phase La0.4Sr0.6Co0.8Fe0.2O3−δ (LSCF) nanocrystallites were successfully synthesized by the combustion method, by employing glycine as fuel and complexing agent, and ammonium nitrate as combustion trigger. The morphological and structural characterization of the LSCF nanopowders was performed by using X-ray diffraction, N2 physisorption and electron microscopy. The LSCF nanopowder consists of interconnected nanocrystallites (∼45 nm) forming a sponge-like structure with meso and macropores, being its specific surface area around 10 m2 g−1. Crystalline structural analyses show that the LSCF nanopowder presents cubic symmetry in the Pm-3m space group. By employing the spin coating technique and different thermal treatments, symmetrical cells with different electrode crystallite size (45 and 685 nm) were built, by using La0.8Sr0.2Ga0.8Mg0.2O3−δ as electrolyte. Electrochemical impedance spectroscopy measurements were performed varying temperature and pO2. The area specific resistance of the nanostructured sample (45 nm) decreases by two orders of magnitude with respect to the submicrostructured sample (685 nm), reaching values as low as 0.8 Ω cm2 at 450 °C. This improvement is attributed to the cathode morphology optimization in the nanoscale, i.e., enlargement of the exposed surface area and shortening of the oxygen diffusion paths, which reduce the polarization resistance associated to the surface exchange and O-ion bulk diffusion process.Fil: Chanquia, Corina Mercedes. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Troiani, Horacio Esteban. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Caneiro, Alberto. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaElsevier Science2014-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/34363Chanquia, Corina Mercedes; Mogni, Liliana Verónica; Troiani, Horacio Esteban; Caneiro, Alberto; Highly active La0.4Sr0.6Co0.8Fe0.2O3−δ nanocatalyst for oxygen reduction in intermediate temperature-solid oxide fuel cells; Elsevier Science; Journal of Power Sources; 270; 7-2014; 457-4670378-7753CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0378775314011860info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jpowsour.2014.07.132info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:34:44Zoai:ri.conicet.gov.ar:11336/34363instacron: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:34982025-10-22 11:34:44.395CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Highly active La0.4Sr0.6Co0.8Fe0.2O3−δ nanocatalyst for oxygen reduction in intermediate temperature-solid oxide fuel cells
title Highly active La0.4Sr0.6Co0.8Fe0.2O3−δ nanocatalyst for oxygen reduction in intermediate temperature-solid oxide fuel cells
spellingShingle Highly active La0.4Sr0.6Co0.8Fe0.2O3−δ nanocatalyst for oxygen reduction in intermediate temperature-solid oxide fuel cells
Chanquia, Corina Mercedes
Combustion Synthesis
Nanocrystallites
La0.4sr0.6co0.8fe0.2o3-D
Solid Oxide Fuel Cell
title_short Highly active La0.4Sr0.6Co0.8Fe0.2O3−δ nanocatalyst for oxygen reduction in intermediate temperature-solid oxide fuel cells
title_full Highly active La0.4Sr0.6Co0.8Fe0.2O3−δ nanocatalyst for oxygen reduction in intermediate temperature-solid oxide fuel cells
title_fullStr Highly active La0.4Sr0.6Co0.8Fe0.2O3−δ nanocatalyst for oxygen reduction in intermediate temperature-solid oxide fuel cells
title_full_unstemmed Highly active La0.4Sr0.6Co0.8Fe0.2O3−δ nanocatalyst for oxygen reduction in intermediate temperature-solid oxide fuel cells
title_sort Highly active La0.4Sr0.6Co0.8Fe0.2O3−δ nanocatalyst for oxygen reduction in intermediate temperature-solid oxide fuel cells
dc.creator.none.fl_str_mv Chanquia, Corina Mercedes
Mogni, Liliana Verónica
Troiani, Horacio Esteban
Caneiro, Alberto
author Chanquia, Corina Mercedes
author_facet Chanquia, Corina Mercedes
Mogni, Liliana Verónica
Troiani, Horacio Esteban
Caneiro, Alberto
author_role author
author2 Mogni, Liliana Verónica
Troiani, Horacio Esteban
Caneiro, Alberto
author2_role author
author
author
dc.subject.none.fl_str_mv Combustion Synthesis
Nanocrystallites
La0.4sr0.6co0.8fe0.2o3-D
Solid Oxide Fuel Cell
topic Combustion Synthesis
Nanocrystallites
La0.4sr0.6co0.8fe0.2o3-D
Solid Oxide Fuel Cell
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Pure-phase La0.4Sr0.6Co0.8Fe0.2O3−δ (LSCF) nanocrystallites were successfully synthesized by the combustion method, by employing glycine as fuel and complexing agent, and ammonium nitrate as combustion trigger. The morphological and structural characterization of the LSCF nanopowders was performed by using X-ray diffraction, N2 physisorption and electron microscopy. The LSCF nanopowder consists of interconnected nanocrystallites (∼45 nm) forming a sponge-like structure with meso and macropores, being its specific surface area around 10 m2 g−1. Crystalline structural analyses show that the LSCF nanopowder presents cubic symmetry in the Pm-3m space group. By employing the spin coating technique and different thermal treatments, symmetrical cells with different electrode crystallite size (45 and 685 nm) were built, by using La0.8Sr0.2Ga0.8Mg0.2O3−δ as electrolyte. Electrochemical impedance spectroscopy measurements were performed varying temperature and pO2. The area specific resistance of the nanostructured sample (45 nm) decreases by two orders of magnitude with respect to the submicrostructured sample (685 nm), reaching values as low as 0.8 Ω cm2 at 450 °C. This improvement is attributed to the cathode morphology optimization in the nanoscale, i.e., enlargement of the exposed surface area and shortening of the oxygen diffusion paths, which reduce the polarization resistance associated to the surface exchange and O-ion bulk diffusion process.
Fil: Chanquia, Corina Mercedes. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Troiani, Horacio Esteban. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Caneiro, Alberto. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Pure-phase La0.4Sr0.6Co0.8Fe0.2O3−δ (LSCF) nanocrystallites were successfully synthesized by the combustion method, by employing glycine as fuel and complexing agent, and ammonium nitrate as combustion trigger. The morphological and structural characterization of the LSCF nanopowders was performed by using X-ray diffraction, N2 physisorption and electron microscopy. The LSCF nanopowder consists of interconnected nanocrystallites (∼45 nm) forming a sponge-like structure with meso and macropores, being its specific surface area around 10 m2 g−1. Crystalline structural analyses show that the LSCF nanopowder presents cubic symmetry in the Pm-3m space group. By employing the spin coating technique and different thermal treatments, symmetrical cells with different electrode crystallite size (45 and 685 nm) were built, by using La0.8Sr0.2Ga0.8Mg0.2O3−δ as electrolyte. Electrochemical impedance spectroscopy measurements were performed varying temperature and pO2. The area specific resistance of the nanostructured sample (45 nm) decreases by two orders of magnitude with respect to the submicrostructured sample (685 nm), reaching values as low as 0.8 Ω cm2 at 450 °C. This improvement is attributed to the cathode morphology optimization in the nanoscale, i.e., enlargement of the exposed surface area and shortening of the oxygen diffusion paths, which reduce the polarization resistance associated to the surface exchange and O-ion bulk diffusion process.
publishDate 2014
dc.date.none.fl_str_mv 2014-07
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/11336/34363
Chanquia, Corina Mercedes; Mogni, Liliana Verónica; Troiani, Horacio Esteban; Caneiro, Alberto; Highly active La0.4Sr0.6Co0.8Fe0.2O3−δ nanocatalyst for oxygen reduction in intermediate temperature-solid oxide fuel cells; Elsevier Science; Journal of Power Sources; 270; 7-2014; 457-467
0378-7753
CONICET Digital
CONICET
url http://hdl.handle.net/11336/34363
identifier_str_mv Chanquia, Corina Mercedes; Mogni, Liliana Verónica; Troiani, Horacio Esteban; Caneiro, Alberto; Highly active La0.4Sr0.6Co0.8Fe0.2O3−δ nanocatalyst for oxygen reduction in intermediate temperature-solid oxide fuel cells; Elsevier Science; Journal of Power Sources; 270; 7-2014; 457-467
0378-7753
CONICET Digital
CONICET
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/S0378775314011860
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jpowsour.2014.07.132
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
application/pdf
application/pdf
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
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score 12.982451

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