The enhanced electrochemical response of Sr(Ti0.3Fe0.7Ru0.07)O3-: δ anodes due to exsolved Ru-Fe nanoparticles

Autores
Glaser, R.; Zhu, T.; Troiani, Horacio Esteban; Caneiro, Alberto; Mogni, Liliana Verónica; Barnett, S.
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A mixed conducting oxide with a nominal composition Sr(Ti0.3Fe0.7Ru0.07)O3-δ (STFRu) is studied, in comparison with SrTi0.3Fe0.7O3-δ (STF) oxide, as an anode for solid oxide fuel cells. Exposing STFRu to reducing fuel conditions at 800 °C for 4 h results in the exsolution of essentially all of the Ru and a small fraction of the Fe from the oxide, and the formation of Ru1-xFex nanoparticles on the oxide surfaces. Most of the nanoparticles have the hexagonal structure expected for Ru-rich alloys, and thermogravimetric analysis suggests the composition x ∼ 0.2. A small fraction of bcc-structure, presumably Fe-rich, nanoparticles are also detected. Comparison of cells with STFRu and STF anodes shows that the presence of Ru induces a reduced polarization resistance and increases the maximum power density under most cell operating conditions, particularly at lower temperatures and hydrogen partial pressures. For example, at 700 °C and 30% H2 fuel, the maximum power density is 0.1 W cm-2 for STF compared to 0.3 W cm-2 for STFRu. There is also a significant change in the shape of the current-voltage curves and the pH2-dependence of the anode polarization resistances RP,A ∝ (pH2)-m, from m ∼ 0.5-1.0 for STF to m ∼ 0.11-0.29 for STFRu; these suggest that Ru1-xFex nanoparticles improve anode performance by promoting hydrogen adsorption.
Fil: Glaser, R.. Northwestern University; Estados Unidos
Fil: Zhu, T.. Northwestern University; Estados Unidos
Fil: Troiani, Horacio Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
Fil: Caneiro, Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. YPF - Tecnología; Argentina
Fil: Mogni, Liliana Verónica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
Fil: Barnett, S.. Northwestern University; Estados Unidos
Materia
Sr(Ti,Fe)O3
Exsolution
Surface decoration
Ruthenium
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:11336/98899
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/98899
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The enhanced electrochemical response of Sr(Ti0.3Fe0.7Ru0.07)O3-: δ anodes due to exsolved Ru-Fe nanoparticlesGlaser, R.Zhu, T.Troiani, Horacio EstebanCaneiro, AlbertoMogni, Liliana VerónicaBarnett, S.Sr(Ti,Fe)O3ExsolutionSurface decorationRutheniumhttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2A mixed conducting oxide with a nominal composition Sr(Ti0.3Fe0.7Ru0.07)O3-δ (STFRu) is studied, in comparison with SrTi0.3Fe0.7O3-δ (STF) oxide, as an anode for solid oxide fuel cells. Exposing STFRu to reducing fuel conditions at 800 °C for 4 h results in the exsolution of essentially all of the Ru and a small fraction of the Fe from the oxide, and the formation of Ru1-xFex nanoparticles on the oxide surfaces. Most of the nanoparticles have the hexagonal structure expected for Ru-rich alloys, and thermogravimetric analysis suggests the composition x ∼ 0.2. A small fraction of bcc-structure, presumably Fe-rich, nanoparticles are also detected. Comparison of cells with STFRu and STF anodes shows that the presence of Ru induces a reduced polarization resistance and increases the maximum power density under most cell operating conditions, particularly at lower temperatures and hydrogen partial pressures. For example, at 700 °C and 30% H2 fuel, the maximum power density is 0.1 W cm-2 for STF compared to 0.3 W cm-2 for STFRu. There is also a significant change in the shape of the current-voltage curves and the pH2-dependence of the anode polarization resistances RP,A ∝ (pH2)-m, from m ∼ 0.5-1.0 for STF to m ∼ 0.11-0.29 for STFRu; these suggest that Ru1-xFex nanoparticles improve anode performance by promoting hydrogen adsorption.Fil: Glaser, R.. Northwestern University; Estados UnidosFil: Zhu, T.. Northwestern University; Estados UnidosFil: Troiani, Horacio Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; ArgentinaFil: Caneiro, Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. YPF - Tecnología; ArgentinaFil: Mogni, Liliana Verónica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; ArgentinaFil: Barnett, S.. Northwestern University; Estados UnidosRoyal Society of Chemistry2018-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/98899Glaser, R.; Zhu, T.; Troiani, Horacio Esteban; Caneiro, Alberto; Mogni, Liliana Verónica; et al.; The enhanced electrochemical response of Sr(Ti0.3Fe0.7Ru0.07)O3-: δ anodes due to exsolved Ru-Fe nanoparticles; Royal Society of Chemistry; Journal of Materials Chemistry A; 6; 12; 3-2018; 5193-52012050-7496CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1039/c7ta10762einfo:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/content/articlelanding/2018/TA/C7TA10762Einfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:54:50Zoai:ri.conicet.gov.ar:11336/98899instacron: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:34982025-09-03 09:54:51.162CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The enhanced electrochemical response of Sr(Ti0.3Fe0.7Ru0.07)O3-: δ anodes due to exsolved Ru-Fe nanoparticles
title The enhanced electrochemical response of Sr(Ti0.3Fe0.7Ru0.07)O3-: δ anodes due to exsolved Ru-Fe nanoparticles
spellingShingle The enhanced electrochemical response of Sr(Ti0.3Fe0.7Ru0.07)O3-: δ anodes due to exsolved Ru-Fe nanoparticles
Glaser, R.
Sr(Ti,Fe)O3
Exsolution
Surface decoration
Ruthenium
title_short The enhanced electrochemical response of Sr(Ti0.3Fe0.7Ru0.07)O3-: δ anodes due to exsolved Ru-Fe nanoparticles
title_full The enhanced electrochemical response of Sr(Ti0.3Fe0.7Ru0.07)O3-: δ anodes due to exsolved Ru-Fe nanoparticles
title_fullStr The enhanced electrochemical response of Sr(Ti0.3Fe0.7Ru0.07)O3-: δ anodes due to exsolved Ru-Fe nanoparticles
title_full_unstemmed The enhanced electrochemical response of Sr(Ti0.3Fe0.7Ru0.07)O3-: δ anodes due to exsolved Ru-Fe nanoparticles
title_sort The enhanced electrochemical response of Sr(Ti0.3Fe0.7Ru0.07)O3-: δ anodes due to exsolved Ru-Fe nanoparticles
dc.creator.none.fl_str_mv Glaser, R.
Zhu, T.
Troiani, Horacio Esteban
Caneiro, Alberto
Mogni, Liliana Verónica
Barnett, S.
author Glaser, R.
author_facet Glaser, R.
Zhu, T.
Troiani, Horacio Esteban
Caneiro, Alberto
Mogni, Liliana Verónica
Barnett, S.
author_role author
author2 Zhu, T.
Troiani, Horacio Esteban
Caneiro, Alberto
Mogni, Liliana Verónica
Barnett, S.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Sr(Ti,Fe)O3
Exsolution
Surface decoration
Ruthenium
topic Sr(Ti,Fe)O3
Exsolution
Surface decoration
Ruthenium
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv A mixed conducting oxide with a nominal composition Sr(Ti0.3Fe0.7Ru0.07)O3-δ (STFRu) is studied, in comparison with SrTi0.3Fe0.7O3-δ (STF) oxide, as an anode for solid oxide fuel cells. Exposing STFRu to reducing fuel conditions at 800 °C for 4 h results in the exsolution of essentially all of the Ru and a small fraction of the Fe from the oxide, and the formation of Ru1-xFex nanoparticles on the oxide surfaces. Most of the nanoparticles have the hexagonal structure expected for Ru-rich alloys, and thermogravimetric analysis suggests the composition x ∼ 0.2. A small fraction of bcc-structure, presumably Fe-rich, nanoparticles are also detected. Comparison of cells with STFRu and STF anodes shows that the presence of Ru induces a reduced polarization resistance and increases the maximum power density under most cell operating conditions, particularly at lower temperatures and hydrogen partial pressures. For example, at 700 °C and 30% H2 fuel, the maximum power density is 0.1 W cm-2 for STF compared to 0.3 W cm-2 for STFRu. There is also a significant change in the shape of the current-voltage curves and the pH2-dependence of the anode polarization resistances RP,A ∝ (pH2)-m, from m ∼ 0.5-1.0 for STF to m ∼ 0.11-0.29 for STFRu; these suggest that Ru1-xFex nanoparticles improve anode performance by promoting hydrogen adsorption.
Fil: Glaser, R.. Northwestern University; Estados Unidos
Fil: Zhu, T.. Northwestern University; Estados Unidos
Fil: Troiani, Horacio Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
Fil: Caneiro, Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. YPF - Tecnología; Argentina
Fil: Mogni, Liliana Verónica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
Fil: Barnett, S.. Northwestern University; Estados Unidos
description A mixed conducting oxide with a nominal composition Sr(Ti0.3Fe0.7Ru0.07)O3-δ (STFRu) is studied, in comparison with SrTi0.3Fe0.7O3-δ (STF) oxide, as an anode for solid oxide fuel cells. Exposing STFRu to reducing fuel conditions at 800 °C for 4 h results in the exsolution of essentially all of the Ru and a small fraction of the Fe from the oxide, and the formation of Ru1-xFex nanoparticles on the oxide surfaces. Most of the nanoparticles have the hexagonal structure expected for Ru-rich alloys, and thermogravimetric analysis suggests the composition x ∼ 0.2. A small fraction of bcc-structure, presumably Fe-rich, nanoparticles are also detected. Comparison of cells with STFRu and STF anodes shows that the presence of Ru induces a reduced polarization resistance and increases the maximum power density under most cell operating conditions, particularly at lower temperatures and hydrogen partial pressures. For example, at 700 °C and 30% H2 fuel, the maximum power density is 0.1 W cm-2 for STF compared to 0.3 W cm-2 for STFRu. There is also a significant change in the shape of the current-voltage curves and the pH2-dependence of the anode polarization resistances RP,A ∝ (pH2)-m, from m ∼ 0.5-1.0 for STF to m ∼ 0.11-0.29 for STFRu; these suggest that Ru1-xFex nanoparticles improve anode performance by promoting hydrogen adsorption.
publishDate 2018
dc.date.none.fl_str_mv 2018-03
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/11336/98899
Glaser, R.; Zhu, T.; Troiani, Horacio Esteban; Caneiro, Alberto; Mogni, Liliana Verónica; et al.; The enhanced electrochemical response of Sr(Ti0.3Fe0.7Ru0.07)O3-: δ anodes due to exsolved Ru-Fe nanoparticles; Royal Society of Chemistry; Journal of Materials Chemistry A; 6; 12; 3-2018; 5193-5201
2050-7496
CONICET Digital
CONICET
url http://hdl.handle.net/11336/98899
identifier_str_mv Glaser, R.; Zhu, T.; Troiani, Horacio Esteban; Caneiro, Alberto; Mogni, Liliana Verónica; et al.; The enhanced electrochemical response of Sr(Ti0.3Fe0.7Ru0.07)O3-: δ anodes due to exsolved Ru-Fe nanoparticles; Royal Society of Chemistry; Journal of Materials Chemistry A; 6; 12; 3-2018; 5193-5201
2050-7496
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1039/c7ta10762e
info:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/content/articlelanding/2018/TA/C7TA10762E
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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Royal Society of Chemistry
publisher.none.fl_str_mv Royal Society of Chemistry
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 13.13397

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