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Influence of catalyst support characteristics and functionalization on the catalytic activity of Pt-Ru for PEM fuel cells

2011Journal article Open access
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dc.contributor.authorCalderon, J. C.
dc.contributor.authorFigueiredo, J. L.
dc.contributor.authorMahata, N.
dc.contributor.authorPereira, M. F. R.
dc.contributor.authorFernandes, Vitor
dc.contributor.authorRangel, C. M.
dc.contributor.authorCalvillo, L.
dc.contributor.authorLázaro, M. J.
dc.contributor.authorPastor, E.
dc.date.accessioned2012-02-01T14:57:31Z
dc.date.available2012-02-01T14:57:31Z
dc.date.issued2011
dc.description.abstractPt-Ru electrocatalysts supported on carbon xerogels and ordered mesoporous carbons were synthesized by reduction with formate ions (SFM method). Chemical and heat treatments were applied to modified the surface chemistry of original carbon supports. Physical characterization of the catalysts was performed using X-ray dispersive energy (EDX) and X-ray diffraction (XRD) techniques, while the electrochemical activity towards methanol oxidation was studied by cyclic voltammetry (CV). Pt-Ru catalysts with nominal metal content (20 wt.%) and atomic ratios (Pt:Ru 1:1) were successfully synthesized on the different supports. Higher methanol oxidation current densities were obtained for those supports with a higher content of surface oxygen groups. Gas diffusion electrode and membrane-electrode-assembly preparation allowed an in-house built of a direct methanol fuel monocell for the evaluation of the catalysts performance. Polarization curves were measured confirming the results obtained in a three electrodes electrochemical cell by CV. Normalized power curves per weight of Pt are discussed in terms of the significant impact on noble metal loading and attained cell maximum power, in comparison with results obtained with a commercial catalystpor
dc.identifier.citationCalderon, J. C. [et. al.]. Influence of catalyst support characteristics and functionalization on the catalytic activity of Pt-Ru for PEM fuel cells. In: Ciência e Tecnologia dos Materiais, 2011, vol. 23, nº 1, p. 13-19por
dc.identifier.urihttp://hdl.handle.net/10400.9/1422
dc.language.isoengpor
dc.subjectCarbon xerogelspor
dc.subjectCMK-3 ordered mesoporous carbonspor
dc.subjectPt-Ru electrocatalystspor
dc.subjectPolymer electrolyte membranepor
dc.subjectFuel cells
dc.titleInfluence of catalyst support characteristics and functionalization on the catalytic activity of Pt-Ru for PEM fuel cellspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage19por
oaire.citation.startPage12por
oaire.citation.titleCiência e Tecnologia dos Materiaispor
person.familyNameFernandes
person.familyNameRangel
person.givenNameVitor
person.givenNameCarmen M.
person.identifier.ciencia-idAA13-FF7C-9E29
person.identifier.orcid0000-0002-3947-0275
person.identifier.orcid0000-0001-7996-8142
person.identifier.ridD-5477-2011
person.identifier.scopus-author-id23970056400
person.identifier.scopus-author-id7006108156
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationcb2b5b48-8c88-4f34-ac87-c5f2558ec151
relation.isAuthorOfPublication804e595a-d539-46a2-ae78-6cadc8ca9457
relation.isAuthorOfPublication.latestForDiscoverycb2b5b48-8c88-4f34-ac87-c5f2558ec151

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