Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline medium

Autores
Berenguer, Raúl; Sieben, Juan Manuel; Quijada, César; Morallón, Emilia
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Different Pt- and Ru-doped Ti/SnO2-Sb electrodes were synthesized by thermal decomposition. The effect of the gradual substitution of Sb by Ru in the nominal composition on the physicochemical and electrochemical properties were evaluated. The electrochemical stability of the electrodes was estimated from accelerated tests at 0.5 A cm-2 in 1 M NaOH. Both as-synthesized and deactivated electrodes were thoroughly characterized by scanning electron microscopy (SEM), energy-dispersive X-ray microanalysis (EDX), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction analysis (XRD). The incorporation of a small amount (about 3 at. %) of both Pt and Ru into the SnO2-Sb electrodes produced a 400-times increase in their service life in alkaline medium, with no remarkable change in the electrocatalysis of the oxygen evolution reaction (OER). It is concluded that the deactivation of the electrodes is promoted by alkaline dissolution of metal species and coating detachment at high potentials. The introduction of Pt has a coating compacting effect, and Ru(IV), at low amounts until 9.75 at. %, replaces the Sn(IV) cations in the rutile-like SnO2 structure to form a solid solution that strongly increases the stability of the electrodes. The observed Ru segregation and decreased stability for larger Ru contents (x > 9.75 at. %), together with the selective dissolution of Ru after deactivation, suggest that the formation of a homogeneous (RuδSn1-δ)O2 single-phase is crucial for the stabilization of these electrodes.
Fil: Berenguer, Raúl. Universidad de Málaga; España
Fil: Sieben, Juan Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
Fil: Quijada, César. Universidad Politécnica de Valencia; España
Fil: Morallón, Emilia. Universidad de Alicante; España
Materia
Alkaline Solutions
Doped Tin Dioxide Electrodes
Dsa Electrodes
Electrochemical Stability
Ruthenium Oxide
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:11336/78953
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/78953
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline mediumBerenguer, RaúlSieben, Juan ManuelQuijada, CésarMorallón, EmiliaAlkaline SolutionsDoped Tin Dioxide ElectrodesDsa ElectrodesElectrochemical StabilityRuthenium Oxidehttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Different Pt- and Ru-doped Ti/SnO2-Sb electrodes were synthesized by thermal decomposition. The effect of the gradual substitution of Sb by Ru in the nominal composition on the physicochemical and electrochemical properties were evaluated. The electrochemical stability of the electrodes was estimated from accelerated tests at 0.5 A cm-2 in 1 M NaOH. Both as-synthesized and deactivated electrodes were thoroughly characterized by scanning electron microscopy (SEM), energy-dispersive X-ray microanalysis (EDX), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction analysis (XRD). The incorporation of a small amount (about 3 at. %) of both Pt and Ru into the SnO2-Sb electrodes produced a 400-times increase in their service life in alkaline medium, with no remarkable change in the electrocatalysis of the oxygen evolution reaction (OER). It is concluded that the deactivation of the electrodes is promoted by alkaline dissolution of metal species and coating detachment at high potentials. The introduction of Pt has a coating compacting effect, and Ru(IV), at low amounts until 9.75 at. %, replaces the Sn(IV) cations in the rutile-like SnO2 structure to form a solid solution that strongly increases the stability of the electrodes. The observed Ru segregation and decreased stability for larger Ru contents (x > 9.75 at. %), together with the selective dissolution of Ru after deactivation, suggest that the formation of a homogeneous (RuδSn1-δ)O2 single-phase is crucial for the stabilization of these electrodes.Fil: Berenguer, Raúl. Universidad de Málaga; EspañaFil: Sieben, Juan Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; ArgentinaFil: Quijada, César. Universidad Politécnica de Valencia; EspañaFil: Morallón, Emilia. Universidad de Alicante; EspañaAmerican Chemical Society2014-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/78953Berenguer, Raúl; Sieben, Juan Manuel; Quijada, César; Morallón, Emilia; Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline medium; American Chemical Society; ACS Applied Materials & Interfaces; 6; 24; 12-2014; 22778-227891944-8244CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/am506958kinfo:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/am506958kinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:03:25Zoai:ri.conicet.gov.ar:11336/78953instacron: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 12:03:25.453CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline medium
title Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline medium
spellingShingle Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline medium
Berenguer, Raúl
Alkaline Solutions
Doped Tin Dioxide Electrodes
Dsa Electrodes
Electrochemical Stability
Ruthenium Oxide
title_short Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline medium
title_full Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline medium
title_fullStr Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline medium
title_full_unstemmed Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline medium
title_sort Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline medium
dc.creator.none.fl_str_mv Berenguer, Raúl
Sieben, Juan Manuel
Quijada, César
Morallón, Emilia
author Berenguer, Raúl
author_facet Berenguer, Raúl
Sieben, Juan Manuel
Quijada, César
Morallón, Emilia
author_role author
author2 Sieben, Juan Manuel
Quijada, César
Morallón, Emilia
author2_role author
author
author
dc.subject.none.fl_str_mv Alkaline Solutions
Doped Tin Dioxide Electrodes
Dsa Electrodes
Electrochemical Stability
Ruthenium Oxide
topic Alkaline Solutions
Doped Tin Dioxide Electrodes
Dsa Electrodes
Electrochemical Stability
Ruthenium Oxide
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Different Pt- and Ru-doped Ti/SnO2-Sb electrodes were synthesized by thermal decomposition. The effect of the gradual substitution of Sb by Ru in the nominal composition on the physicochemical and electrochemical properties were evaluated. The electrochemical stability of the electrodes was estimated from accelerated tests at 0.5 A cm-2 in 1 M NaOH. Both as-synthesized and deactivated electrodes were thoroughly characterized by scanning electron microscopy (SEM), energy-dispersive X-ray microanalysis (EDX), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction analysis (XRD). The incorporation of a small amount (about 3 at. %) of both Pt and Ru into the SnO2-Sb electrodes produced a 400-times increase in their service life in alkaline medium, with no remarkable change in the electrocatalysis of the oxygen evolution reaction (OER). It is concluded that the deactivation of the electrodes is promoted by alkaline dissolution of metal species and coating detachment at high potentials. The introduction of Pt has a coating compacting effect, and Ru(IV), at low amounts until 9.75 at. %, replaces the Sn(IV) cations in the rutile-like SnO2 structure to form a solid solution that strongly increases the stability of the electrodes. The observed Ru segregation and decreased stability for larger Ru contents (x > 9.75 at. %), together with the selective dissolution of Ru after deactivation, suggest that the formation of a homogeneous (RuδSn1-δ)O2 single-phase is crucial for the stabilization of these electrodes.
Fil: Berenguer, Raúl. Universidad de Málaga; España
Fil: Sieben, Juan Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
Fil: Quijada, César. Universidad Politécnica de Valencia; España
Fil: Morallón, Emilia. Universidad de Alicante; España
description Different Pt- and Ru-doped Ti/SnO2-Sb electrodes were synthesized by thermal decomposition. The effect of the gradual substitution of Sb by Ru in the nominal composition on the physicochemical and electrochemical properties were evaluated. The electrochemical stability of the electrodes was estimated from accelerated tests at 0.5 A cm-2 in 1 M NaOH. Both as-synthesized and deactivated electrodes were thoroughly characterized by scanning electron microscopy (SEM), energy-dispersive X-ray microanalysis (EDX), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction analysis (XRD). The incorporation of a small amount (about 3 at. %) of both Pt and Ru into the SnO2-Sb electrodes produced a 400-times increase in their service life in alkaline medium, with no remarkable change in the electrocatalysis of the oxygen evolution reaction (OER). It is concluded that the deactivation of the electrodes is promoted by alkaline dissolution of metal species and coating detachment at high potentials. The introduction of Pt has a coating compacting effect, and Ru(IV), at low amounts until 9.75 at. %, replaces the Sn(IV) cations in the rutile-like SnO2 structure to form a solid solution that strongly increases the stability of the electrodes. The observed Ru segregation and decreased stability for larger Ru contents (x > 9.75 at. %), together with the selective dissolution of Ru after deactivation, suggest that the formation of a homogeneous (RuδSn1-δ)O2 single-phase is crucial for the stabilization of these electrodes.
publishDate 2014
dc.date.none.fl_str_mv 2014-12
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/11336/78953
Berenguer, Raúl; Sieben, Juan Manuel; Quijada, César; Morallón, Emilia; Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline medium; American Chemical Society; ACS Applied Materials & Interfaces; 6; 24; 12-2014; 22778-22789
1944-8244
CONICET Digital
CONICET
url http://hdl.handle.net/11336/78953
identifier_str_mv Berenguer, Raúl; Sieben, Juan Manuel; Quijada, César; Morallón, Emilia; Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline medium; American Chemical Society; ACS Applied Materials & Interfaces; 6; 24; 12-2014; 22778-22789
1944-8244
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1021/am506958k
info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/am506958k
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 American Chemical Society
publisher.none.fl_str_mv American Chemical 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_ 1846782376294744064
score 12.982451

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