Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline medium
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 estimate...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/51768 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/51768 |
| Access Level: | acceso abierto |
| Palabra clave: | alkaline solutions ruthenium oxide electrochemical stability doped tin dioxide electrodes DSA electrodes QUIMICA FISICA |
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Pt- and Ru-doped SnO2-Sb anodes with high stability in alkaline mediumBerenguer Betrián, RaúlSieben, Juan ManuelQuijada Tomás, CesarMorallón, Emiliaalkaline solutionsruthenium oxideelectrochemical stabilitydoped tin dioxide electrodesDSA electrodesQUIMICA FISICADifferent 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.The authors thank the MINECO, FEDER, and Generalitat Valenciana for the financial support (MAT2013-42007-P, PROMETEO2013/028 projects).American Chemical SocietyMinisterio de Economía y CompetitividadRepositorio Institucional de la Universitat Politècnica de València Riunet20142014-12-02journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://riunet.upv.es/handle/10251/51768reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengMinisterio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 MAT2013-42007-P FUNCIONALIZACION ELECTROQUIMICA DE MATERIALES AVANZADOS PARA APLICACIONES EN ENERGIA Y BIOSENSORES ELECTROQUIMICOSopen accesshttp://purl.org/coar/access_right/c_abf2Reserva de todos los derechoshttp://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/517682026-06-13T07:49:27Z |
| 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 Betrián, Raúl alkaline solutions ruthenium oxide electrochemical stability doped tin dioxide electrodes DSA electrodes QUIMICA FISICA |
| 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 Betrián, Raúl Sieben, Juan Manuel Quijada Tomás, Cesar Morallón, Emilia |
| author |
Berenguer Betrián, Raúl |
| author_facet |
Berenguer Betrián, Raúl Sieben, Juan Manuel Quijada Tomás, Cesar Morallón, Emilia |
| author_role |
author |
| author2 |
Sieben, Juan Manuel Quijada Tomás, Cesar Morallón, Emilia |
| author2_role |
author author author |
| dc.contributor.none.fl_str_mv |
Ministerio de Economía y Competitividad Repositorio Institucional de la Universitat Politècnica de València Riunet |
| dc.subject.none.fl_str_mv |
alkaline solutions ruthenium oxide electrochemical stability doped tin dioxide electrodes DSA electrodes QUIMICA FISICA |
| topic |
alkaline solutions ruthenium oxide electrochemical stability doped tin dioxide electrodes DSA electrodes QUIMICA FISICA |
| 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 2014-12-02 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 VoR http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://riunet.upv.es/handle/10251/51768 |
| url |
https://riunet.upv.es/handle/10251/51768 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.relation.none.fl_str_mv |
Ministerio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 MAT2013-42007-P FUNCIONALIZACION ELECTROQUIMICA DE MATERIALES AVANZADOS PARA APLICACIONES EN ENERGIA Y BIOSENSORES ELECTROQUIMICOS |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Reserva de todos los derechos http://rightsstatements.org/vocab/InC/1.0/ |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 Reserva de todos los derechos http://rightsstatements.org/vocab/InC/1.0/ |
| eu_rights_str_mv |
openAccess |
| 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 |
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reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname:Universitat Politècnica de València (UPV) |
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Universitat Politècnica de València (UPV) |
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RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
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RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
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