Electrochemical and fuel cell evaluation of PtIr/C electrocatalysts for ethanol electrooxidation in alkaline medium

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dc.contributor.authorSILVA, SIRLANE G. da
dc.contributor.authorASSUMPCAO, MONICA H.M.T.
dc.contributor.authorSOUZA, RODRIGO F.B. de
dc.contributor.authorBUZZO, GUILHERME S.
dc.contributor.authorSPINACE, ESTEVAM V.
dc.contributor.authorOLIVEIRA NETO, ALMIR
dc.contributor.authorSILVA, JULIO C.M.
dc.coverageInternacionalpt_BR
dc.date.accessioned2014-09-08T14:00:31Z
dc.date.available2014-09-08T14:00:31Z
dc.date.issued2014pt_BR
dc.description.abstractPtIr/C electrocatalysts prepared by borohydride reduction process were characterized by X-ray diffraction, transmission electron microscopy, and cyclic voltammetry. The X-ray diffraction measurements suggested the PtIr alloy formation; furthermore, peaks of IrO2 were not observed; nevertheless, the presence of Ir oxides in small amounts and amorphous forms cannot be discarded. The transmission electron microscopy showed the average particle diameter between 4.0 and 6.0 nm for all compositions prepared. The catalytic activity for ethanol electrooxidation in alkaline medium at room temperature (cyclic voltammetry and chronoamperometry results) showed that PtIr/C (70:30) and PtIr (90:10) exhibited higher performance toward ethanol oxidation than the other electrocatalysts. Experiments using direct ethanol alkaline fuel cell at 75 °C showed PtIr (90:10) as the best electrocatalyst and Ir/C as virtually inactive for ethanol oxidation in real conditions. The best result obtained using PtIr/C may be associated to the electronic effect between Pt and Ir that could decrease the poisoning on catalyst surface and also by the occurrence of bifunctional mechanism.
dc.format.extent438-444pt_BR
dc.identifier.citationSILVA, SIRLANE G. da; ASSUMPCAO, MONICA H.M.T.; SOUZA, RODRIGO F.B. de; BUZZO, GUILHERME S.; SPINACE, ESTEVAM V.; OLIVEIRA NETO, ALMIR; SILVA, JULIO C.M. Electrochemical and fuel cell evaluation of PtIr/C electrocatalysts for ethanol electrooxidation in alkaline medium. <b>Electrocatalysis</b>, v. 5, n. 5, p. 438-444, 2014. DOI: <a href="https://dx.doi.org/10.1007/s12678-014-0213-2">10.1007/s12678-014-0213-2</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/9024.
dc.identifier.doi10.1007/s12678-014-0213-2
dc.identifier.fasciculo5pt_BR
dc.identifier.issn1868-2529pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-9287-6071
dc.identifier.orcidhttps://orcid.org/0000-0002-7011-8261
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/9024
dc.identifier.vol5pt_BR
dc.relation.ispartofElectrocatalysispt_BR
dc.rightsopenAccess
dc.subjectelectrochemistry
dc.subjectelectrocatalysts
dc.subjectplatinum
dc.subjectiridium
dc.subjectcarbon
dc.subjectdirect ethanol fuel cells
dc.subjectoxidation
dc.titleElectrochemical and fuel cell evaluation of PtIr/C electrocatalysts for ethanol electrooxidation in alkaline mediumpt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorRODRIGO FERNANDO BRAMBILLA DE SOUZA
ipen.autorJULIO CESAR M. DA SILVA
ipen.autorALMIR OLIVEIRA NETO
ipen.autorESTEVAM VITORIO SPINACE
ipen.autorMONICA HELENA MARCON TEIXEIRA ASSUMPÇAO
ipen.autorSIRLANE GOMES DA SILVA
ipen.codigoautor11260
ipen.codigoautor9865
ipen.codigoautor3541
ipen.codigoautor555
ipen.codigoautor10679
ipen.codigoautor9253
ipen.contributor.ipenauthorRODRIGO FERNANDO BRAMBILLA DE SOUZA
ipen.contributor.ipenauthorJULIO CESAR M. DA SILVA
ipen.contributor.ipenauthorALMIR OLIVEIRA NETO
ipen.contributor.ipenauthorESTEVAM VITORIO SPINACE
ipen.contributor.ipenauthorMONICA HELENA MARCON TEIXEIRA ASSUMPÇAO
ipen.contributor.ipenauthorSIRLANE GOMES DA SILVA
ipen.date.recebimento14-09pt_BR
ipen.identifier.fi2.138pt_BR
ipen.identifier.ipendoc20124pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.identifier.ods7
ipen.range.fi1.500 - 2.999
ipen.type.genreArtigo
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relation.isAuthorOfPublication00111b28-1f4e-43d5-be3a-06dc2842ec5e
relation.isAuthorOfPublication.latestForDiscovery00111b28-1f4e-43d5-be3a-06dc2842ec5e
sigepi.autor.atividadeSILVA, SIRLANE G. DA:9253:610:S
sigepi.autor.atividadeASSUMPÇÃO, MÔNICA H.M.T.:10679:-1:N
sigepi.autor.atividadeSOUZA, RODRIGO F.B. DE:11260:-1:N
sigepi.autor.atividadeSPINACE, ESTEVAM V.:555:610:N
sigepi.autor.atividadeOLIVEIRA NETO, ALMIR:3541:610:N
sigepi.autor.atividadeSILVA, JULIO C.M.:9865:-1:N
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