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dc.creatorElezović, Nevenka R.
dc.creatorBabić, Biljana M.
dc.creatorGajić Krstajić, Ljiljana
dc.creatorRadmilović, Velimir R.
dc.creatorKrstajić, Nedeljko V.
dc.creatorVračar, Ljiljana
dc.date.accessioned2018-06-22T18:43:20Z
dc.date.available2018-06-22T18:43:20Z
dc.date.issued2010
dc.identifier.issn0378-7753
dc.identifier.urihttp://dais.sanu.ac.rs/123456789/3418
dc.description.abstractIn order to point out the effect of the support to the catalyst for oxygen reduction reaction nano-crystalline Nb-doped TiO2 was synthesized through a modified sol-gel route procedure. The specific surface area of the support, SBET, and pore size distribution, were calculated from the adsorption isotherms using the gravimetric McBain method. The support was characterized by X-ray diffraction (XRD) technique. The borohydride reduction method was used to prepare Nb-TiO2 supported Pt (20 wt.%) catalyst. The synthesized catalyst was analyzed by TEM technique. Finally, the catalytic activity of this new catalyst for oxygen reduction reaction was investigated in acid solution, in the absence and the presence of methanol, and its activity was compared towards the results on C/Pt catalysts. Kinetic analysis reveals that the oxygen reduction reaction on Nb-TiO2/Pt catalyst follows four-electron process leading to water, as in the case of C/Pt electrode, but the Tafel plots normalized to the electrochemically active surface area show very remarkable enhancement in activity of Nb-TiO2/Pt expressed through the value of the current density at the constant potential. Moreover, Nb-TiO2/Pt catalyst exhibits higher methanol tolerance during the oxygen reduction reaction than the C/Pt catalyst. The enhancement in the activity of Nb-TiO2/Pt is consequence of both: the interactions of Pt nanoparticles with the support and the energy shift of the surface d-states with respect to the Fermi level what changes the surface reactivity. © 2010 Elsevier B.V.
dc.publisherElsevier
dc.relationinfo:eu-repo/grantAgreement/MESTD/MPN2006-2010/142038/RS//
dc.relationUnited States Department of Energy, Office of Science, Office of Basic Energy Sciences, Grant DE-AC02-05CH11231
dc.rightsrestrictedAccess
dc.sourceJournal of Power Sources
dc.subjectmethanol
dc.subjectNb-TiO2 support
dc.subjectNb-TiO2/Pt catalyst
dc.subjectoxygen reduction reaction
dc.titleSynthesis, characterization and electrocatalytical behavior of Nb-TiO2/Pt nanocatalyst for oxygen reduction reaction
dc.typearticleen
dc.rights.licenseARR
dcterms.abstractГајић-Крстајић, Љиљана; Радмиловић, Велимир; Крстајић, Недељко В.; Бабић, Б. М.; Врачар, Љ.; Елезовић, Невенка Р.;
dc.citation.spage3961
dc.citation.epage3968
dc.citation.volume195
dc.citation.issue13
dc.identifier.doi10.1016/j.jpowsour.2010.01.035
dc.identifier.scopus2-s2.0-77949540760
dc.type.versionpublishedVersion
dc.identifier.fulltexthttp://dais.sanu.ac.rs/bitstream/handle/123456789/3418/Elezovic_Journal of Power Sources_195_2010_3961_3968.pdf


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