Study of the mechanisms of O2-reduction and degradation operating on La0.5-XPrxBa0.5CoO3-δ cathodes for SOFCs

Autores
Garcés, Diana Andrea; Wang, Hongqian; Barnett, Scott A.; Leyva, Ana Gabriela; Mogni, Liliana Verónica
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The oxygen reduction mechanism and time evolution behavior were studied for porous La0.5-xPrxBa0.5CoO3-δ (LPBC) electrodes deposited onto Ce0.9Gd0.1O1.95 electrolytes. Electrochemical impedance spectroscopy (EIS) measurements, performed between 400 and 800 °C as a function of pO2, show that the electrochemical response is limited by O2-gas diffusion and surface reaction (O-surface exchange + O-ion diffusion). The time evolution of the cathode resistance at 700 °C in air shows an increase from 0.03 to 0.05 Ωcm2 after 280 h of testing. Three-dimensional (3D) tomographic using focused ion beam–scanning electron microscopy (FIB-SEM) showed little changes of microstructure after the ageing. The increase in resistance was explained by an increase in the amount of a water-soluble Ba-rich surface phase by a factor of 2, after ageing of the LPBC electrode, by an etching procedure coupled with inductively coupled plasma-optical emission spectrometry (ICP-OES).
Fil: Garcés, Diana Andrea. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina
Fil: Wang, Hongqian. Northwestern University; Estados Unidos
Fil: Barnett, Scott A.. Northwestern University; Estados Unidos
Fil: Leyva, Ana Gabriela. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad Nacional de San Martín; Argentina
Fil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
3d Tomography
Sofc Cathode
Barium Segregation
Oxygen Reduction Reaction
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:11336/58231
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Study of the mechanisms of O2-reduction and degradation operating on La0.5-XPrxBa0.5CoO3-δ cathodes for SOFCsGarcés, Diana AndreaWang, HongqianBarnett, Scott A.Leyva, Ana GabrielaMogni, Liliana Verónica3d TomographySofc CathodeBarium SegregationOxygen Reduction Reactionhttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2The oxygen reduction mechanism and time evolution behavior were studied for porous La0.5-xPrxBa0.5CoO3-δ (LPBC) electrodes deposited onto Ce0.9Gd0.1O1.95 electrolytes. Electrochemical impedance spectroscopy (EIS) measurements, performed between 400 and 800 °C as a function of pO2, show that the electrochemical response is limited by O2-gas diffusion and surface reaction (O-surface exchange + O-ion diffusion). The time evolution of the cathode resistance at 700 °C in air shows an increase from 0.03 to 0.05 Ωcm2 after 280 h of testing. Three-dimensional (3D) tomographic using focused ion beam–scanning electron microscopy (FIB-SEM) showed little changes of microstructure after the ageing. The increase in resistance was explained by an increase in the amount of a water-soluble Ba-rich surface phase by a factor of 2, after ageing of the LPBC electrode, by an etching procedure coupled with inductively coupled plasma-optical emission spectrometry (ICP-OES).Fil: Garcés, Diana Andrea. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; ArgentinaFil: Wang, Hongqian. Northwestern University; Estados UnidosFil: Barnett, Scott A.. Northwestern University; Estados UnidosFil: Leyva, Ana Gabriela. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad Nacional de San Martín; ArgentinaFil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaElectrochemical Society2017-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/58231Garcés, Diana Andrea; Wang, Hongqian; Barnett, Scott A.; Leyva, Ana Gabriela; Mogni, Liliana Verónica; Study of the mechanisms of O2-reduction and degradation operating on La0.5-XPrxBa0.5CoO3-δ cathodes for SOFCs; Electrochemical Society; ECS Transactions; 78; 1; 5-2017; 1011-10201938-6737CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1149/07801.1011ecstinfo:eu-repo/semantics/altIdentifier/url/http://ecst.ecsdl.org/content/78/1/1011info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:42:16Zoai:ri.conicet.gov.ar:11336/58231instacron: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 11:42:16.381CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Study of the mechanisms of O2-reduction and degradation operating on La0.5-XPrxBa0.5CoO3-δ cathodes for SOFCs
title Study of the mechanisms of O2-reduction and degradation operating on La0.5-XPrxBa0.5CoO3-δ cathodes for SOFCs
spellingShingle Study of the mechanisms of O2-reduction and degradation operating on La0.5-XPrxBa0.5CoO3-δ cathodes for SOFCs
Garcés, Diana Andrea
3d Tomography
Sofc Cathode
Barium Segregation
Oxygen Reduction Reaction
title_short Study of the mechanisms of O2-reduction and degradation operating on La0.5-XPrxBa0.5CoO3-δ cathodes for SOFCs
title_full Study of the mechanisms of O2-reduction and degradation operating on La0.5-XPrxBa0.5CoO3-δ cathodes for SOFCs
title_fullStr Study of the mechanisms of O2-reduction and degradation operating on La0.5-XPrxBa0.5CoO3-δ cathodes for SOFCs
title_full_unstemmed Study of the mechanisms of O2-reduction and degradation operating on La0.5-XPrxBa0.5CoO3-δ cathodes for SOFCs
title_sort Study of the mechanisms of O2-reduction and degradation operating on La0.5-XPrxBa0.5CoO3-δ cathodes for SOFCs
dc.creator.none.fl_str_mv Garcés, Diana Andrea
Wang, Hongqian
Barnett, Scott A.
Leyva, Ana Gabriela
Mogni, Liliana Verónica
author Garcés, Diana Andrea
author_facet Garcés, Diana Andrea
Wang, Hongqian
Barnett, Scott A.
Leyva, Ana Gabriela
Mogni, Liliana Verónica
author_role author
author2 Wang, Hongqian
Barnett, Scott A.
Leyva, Ana Gabriela
Mogni, Liliana Verónica
author2_role author
author
author
author
dc.subject.none.fl_str_mv 3d Tomography
Sofc Cathode
Barium Segregation
Oxygen Reduction Reaction
topic 3d Tomography
Sofc Cathode
Barium Segregation
Oxygen Reduction Reaction
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 oxygen reduction mechanism and time evolution behavior were studied for porous La0.5-xPrxBa0.5CoO3-δ (LPBC) electrodes deposited onto Ce0.9Gd0.1O1.95 electrolytes. Electrochemical impedance spectroscopy (EIS) measurements, performed between 400 and 800 °C as a function of pO2, show that the electrochemical response is limited by O2-gas diffusion and surface reaction (O-surface exchange + O-ion diffusion). The time evolution of the cathode resistance at 700 °C in air shows an increase from 0.03 to 0.05 Ωcm2 after 280 h of testing. Three-dimensional (3D) tomographic using focused ion beam–scanning electron microscopy (FIB-SEM) showed little changes of microstructure after the ageing. The increase in resistance was explained by an increase in the amount of a water-soluble Ba-rich surface phase by a factor of 2, after ageing of the LPBC electrode, by an etching procedure coupled with inductively coupled plasma-optical emission spectrometry (ICP-OES).
Fil: Garcés, Diana Andrea. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina
Fil: Wang, Hongqian. Northwestern University; Estados Unidos
Fil: Barnett, Scott A.. Northwestern University; Estados Unidos
Fil: Leyva, Ana Gabriela. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad Nacional de San Martín; Argentina
Fil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description The oxygen reduction mechanism and time evolution behavior were studied for porous La0.5-xPrxBa0.5CoO3-δ (LPBC) electrodes deposited onto Ce0.9Gd0.1O1.95 electrolytes. Electrochemical impedance spectroscopy (EIS) measurements, performed between 400 and 800 °C as a function of pO2, show that the electrochemical response is limited by O2-gas diffusion and surface reaction (O-surface exchange + O-ion diffusion). The time evolution of the cathode resistance at 700 °C in air shows an increase from 0.03 to 0.05 Ωcm2 after 280 h of testing. Three-dimensional (3D) tomographic using focused ion beam–scanning electron microscopy (FIB-SEM) showed little changes of microstructure after the ageing. The increase in resistance was explained by an increase in the amount of a water-soluble Ba-rich surface phase by a factor of 2, after ageing of the LPBC electrode, by an etching procedure coupled with inductively coupled plasma-optical emission spectrometry (ICP-OES).
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/11336/58231
Garcés, Diana Andrea; Wang, Hongqian; Barnett, Scott A.; Leyva, Ana Gabriela; Mogni, Liliana Verónica; Study of the mechanisms of O2-reduction and degradation operating on La0.5-XPrxBa0.5CoO3-δ cathodes for SOFCs; Electrochemical Society; ECS Transactions; 78; 1; 5-2017; 1011-1020
1938-6737
CONICET Digital
CONICET
url http://hdl.handle.net/11336/58231
identifier_str_mv Garcés, Diana Andrea; Wang, Hongqian; Barnett, Scott A.; Leyva, Ana Gabriela; Mogni, Liliana Verónica; Study of the mechanisms of O2-reduction and degradation operating on La0.5-XPrxBa0.5CoO3-δ cathodes for SOFCs; Electrochemical Society; ECS Transactions; 78; 1; 5-2017; 1011-1020
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/10.1149/07801.1011ecst
info:eu-repo/semantics/altIdentifier/url/http://ecst.ecsdl.org/content/78/1/1011
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 Electrochemical Society
publisher.none.fl_str_mv 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
_version_ 1846782108334292992
score 12.982451

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