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dc.creatorTripković, Amalija
dc.creatorPopović, Ksenija
dc.creatorGrgur, Branimir N.
dc.creatorBlizanac, B.
dc.creatorRoss, Phillip N.
dc.creatorMarković, Nenad M.
dc.date.accessioned2019-05-24T22:42:08Z
dc.date.available2019-05-24T22:42:08Z
dc.date.issued2002
dc.identifier.issn0013-4686
dc.identifier.urihttps://cer.ihtm.bg.ac.rs/handle/123456789/2883
dc.description.abstractThe kinetics of methanol oxidation on supported 47.5 wt.% Pt and 54 wt.% PtRu (with nominal Pt:Ru ratios of 2:3) catalysts are measured in 0.5 M H2SO4 and 0.1 NaOH at 295 and 333 K using thin-film rotating disk electrode (RDE) method. It was found that the activity of Pt and PtRu for methanol oxidation is a strong function of pH of solution and temperature. The kinetics are much higher in alkaline than in acid solution; at 333 K, a factor of 30 for Pt and a factor of 20 for Pt2Ru3 at 0.5 V. The pH effect is attributed to the pH competitive adsorption of oxygenated species with anions from supporting electrolytes. The activity of Pt and Pt2Ru3 catalysts at 333 K is higher (a factor of 5) than at 295 K. Irrespective of pH, only negligible differences in the kinetics are observed between Pt and on high Ru content Pt alloys, presumably owing to a slow rate of methanol dehydrogenation on the Ru-rich surface and insufficient number of Pt sites required for dissociative chemisorption of methanol.en
dc.language.isoensr
dc.publisherElseviersr
dc.relationUS Department of Energy (USDOE) Contract No. DE-AC03-76SF00098sr
dc.relationMinistry of Science, Technology and Development of Serbia, Contract No. X-1796sr
dc.rightsrestrictedAccesssr
dc.sourceElectrochimica Actasr
dc.subjectRotating disk electrode (RDE)sr
dc.subjectPt-Ru alloysr
dc.subjectTransmission electron microscopy (TEM)sr
dc.subjectX-ray diffraction (XRD)sr
dc.titleMethanol electrooxidation on supported Pt and Pt-Ru catalysts in acid and alkaline solutionsen
dc.typearticlesr
dc.rights.licenseARRsr
dcterms.abstractРосс, П.Н.; Поповић, Ксенија Ђ.; Гргур, Бранимир Н.; Трипковић, Aмалија В.; Близанац, Б.; Марковић, Н. М.;
dc.citation.volume47
dc.citation.spage3707
dc.citation.epage3714
dc.citation.rankM21
dc.identifier.doi10.1016/S0013-4686(02)00340-7
dc.identifier.scopus2-s2.0-0037200196
dc.identifier.wos000178071500013
dc.type.versionpublishedVersionsr


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