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The Extent on the Nanoscale of Pt-Skin Effects on Oxygen Reduction and Its Influence on Fuel Cell Power

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dc.contributor.authorMalheiro, Arthur R. [UNESP]
dc.contributor.authorPerez, Joelma [UNESP]
dc.contributor.authorSantiago, Elisabete I.
dc.contributor.authorVillullas, Hebe de Las Mercedes [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionInstituto de Pesquisas Energéticas e Nucleares (IPEN)
dc.date.accessioned2014-05-20T14:18:37Z
dc.date.available2014-05-20T14:18:37Z
dc.date.issued2010-12-02
dc.description.abstractCarbon-supported PtFe nanoparticles having similar overall composition (3:1), crystallinity, and average particle diameter were prepared with and without a Pt-skin layer and used to evaluate the extent, on the nanometer scale, of Pt-skin effects on the activity for oxygen reduction. In this study, we show that when most of the relevant properties of the catalysts are kept alike, there is an increase of about 2-fold in the intrinsic activity for oxygen reduction that can be ascribed to Pt-skin effects. It is also demonstrated that the activity improvement produced by the presence of a Pt-skin surface is, however, insufficient to generate significant differences on the power density of a single proton exchange membrane fuel cell.en
dc.description.affiliationUniv Estadual Paulista, UNESP, Inst Quim, Dept Quim Fis, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationIPEN CNEN SP, BR-05508000 São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Inst Quim, Dept Quim Fis, BR-14800900 Araraquara, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFinanciadora de Estudos e Projetos (FINEP)
dc.description.sponsorshipIdFAPESP: 07/54434-0
dc.description.sponsorshipIdCNPq: 480662/2007-0
dc.description.sponsorshipIdCNPq: 305106/2007-4
dc.description.sponsorshipIdFINEP: 01.06.0939.00
dc.format.extent20267-20271
dc.identifierhttp://dx.doi.org/10.1021/jp107054u
dc.identifier.citationJournal of Physical Chemistry C. Washington: Amer Chemical Soc, v. 114, n. 47, p. 20267-20271, 2010.
dc.identifier.doi10.1021/jp107054u
dc.identifier.issn1932-7447
dc.identifier.lattes0967996519065806
dc.identifier.urihttp://hdl.handle.net/11449/25613
dc.identifier.wosWOS:000284455200053
dc.language.isoeng
dc.publisherAmer Chemical Soc
dc.relation.ispartofJournal of Physical Chemistry C
dc.relation.ispartofjcr4.484
dc.relation.ispartofsjr2,135
dc.rights.accessRightsAcesso restritopt
dc.sourceWeb of Science
dc.titleThe Extent on the Nanoscale of Pt-Skin Effects on Oxygen Reduction and Its Influence on Fuel Cell Poweren
dc.typeArtigopt
dcterms.licensehttp://pubs.acs.org/page/copyright/journals/faqs.html
dcterms.rightsHolderAmer Chemical Soc
dspace.entity.typePublication
relation.isOrgUnitOfPublicationbc74a1ce-4c4c-4dad-8378-83962d76c4fd
relation.isOrgUnitOfPublication.latestForDiscoverybc74a1ce-4c4c-4dad-8378-83962d76c4fd
unesp.author.lattes0967996519065806
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentFísico-Química - IQARpt

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Araraquara - IQAR - Instituto de Química