Electrochemical stability of SnO2-based coated Ti electrodes

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dc.contributor.authorFugivara, Cecilio Sadao [UNESP]
dc.contributor.authorPaiva-Santos, C. O.
dc.contributor.authorBenedetti, Assis Vicente [UNESP]
dc.contributor.authorModiano, S.
dc.contributor.authorSumodjo, PTA
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:19:47Z
dc.date.available2014-05-20T15:19:47Z
dc.date.issued1998-01-01
dc.description.abstractThe electrochemical behavior of SnO2-SbOx, based electrodes, with and without the addition of RuO2, was studied by cyclic voltammetry, service life measurements and electrochemical impedance spectroscopy in 0.5 M H2SO4 the physical characteristics of these materials were investigated using SEM, EDX and XRD. The resulting cyclic voltammograms obtained using SnO2-SbOx, and SnO2-SbOx-RuO2(x), x = 30, 5, 1 and 0.4 % showed that the OER overpotential decreased with the addition of RuO2. In the repetitive triangular potential voltammetry applied to the SnO2 electrode without and with RuO2 (1%), a higher anodic current is observed during the first potential scan; it is explained in terms of the oxidation of the Ti substrate. The addition of 1% RuO2 increased the service life from 8 to 20 hours at 10 mAcm(-2), while at 50 mAcm(-2) this increase was from 1 to 8 hours. AC Impedance diagrams obtained for the Ti/SnO2-SbOx and Ti/SnO2-SbOx-RuO2 electrodes at the rest potential and at a potential in the OER region can be explained by a single equivalent circuit containing two elements in series. The results showed that the charge transfer resistance and the resistance of the oxide film are lower in the oxide film containing RuO2. Surface analysis of Ti/SnO2-SbOx, revealed that it is relatively porous and formed by clusters of small particles. The Ti/SnO2-SbOx-RuO2 (1%) film is more compact, though. XRD analysis showed that a Sn1-xTixO2 oxide is formed on the Ti/SnO2-SbOx with 1% and without RuO2 electrodes.en
dc.description.affiliationUniv Estadual Paulista, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.format.extent39-49
dc.identifierhttp://chiroptera.unb.br/index.php/cn/article/view/130
dc.identifier.citationEnergy and Electrochemical Processing For A Cleaner Environment. Pennington: Electrochemical Society Inc., v. 97, n. 28, p. 39-49, 1998.
dc.identifier.lattes2797127887030838
dc.identifier.urihttp://hdl.handle.net/11449/31173
dc.identifier.wosWOS:000072959300004
dc.language.isoeng
dc.publisherElectrochemical Society Inc
dc.relation.ispartofEnergy and Electrochemical Processing For A Cleaner Environment
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.titleElectrochemical stability of SnO2-based coated Ti electrodesen
dc.typeTrabalho apresentado em evento
dcterms.rightsHolderElectrochemical Society Inc
unesp.author.lattes2797127887030838[1]
unesp.author.lattes1769008264876945[3]
unesp.author.orcid0000-0002-0243-6639[3]
unesp.author.orcid0000-0002-2288-2601[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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