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dc.creatorObradović, Maja
dc.creatorGojković, Snežana Lj.
dc.creatorElezović, Nevenka R.
dc.creatorErcius, P.
dc.creatorRadmilović, Velimir R.
dc.creatorVracar, Lj. D.
dc.creatorKrstajić, Nedeljko V.
dc.date.accessioned2019-01-30T17:29:12Z
dc.date.available2019-01-30T17:29:12Z
dc.date.issued2012
dc.identifier.issn1572-6657
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/948
dc.description.abstractThe catalytic activity of WC/Pt electrocatalysts towards hydrogen oxidation reaction (HOR) in acid solution was studied. Tungsten carbide (WC) prepared by polycondensation of resorcinol and formaldehyde in the presence of ammonium metatungstate salt and CTABr surfactant was used as the support of a Pt electrocatalyst (WC/Pt). The obtained WC/Pt electrodes were characterized by XRD, HRTEM, EDS, EELS and electrochemical measurements. HRTEM analysis showed that the WC particles possess a core-shell structure with a metallic tungsten core and a shell composed of a mixture of tungsten carbides shell (WC and W2C). The WC/Pt catalyst is composed of well-dispersed sub-nanometer Pt clusters which consist of a few to several tens of Pt atoms. EELS measurements indicate that the WC particles function as nucleation sites for Pt nanoparticles. Based on the Tafel-Heyrovsky-Volmer mechanism the corresponding kinetic equations were derived to describe the HOR current-potential behavior over the entire potential region on RDE. The fitting showed that in the lower potential region HOR on Pt proceeds most likely via the Tafel-Volmer (TV) pathway. The kinetic results also showed that the WC/Pt(1%) when compared to the standard C/Pt(1%) electrode led to a remarkable enhancement of the hydrogen oxidation in an acidic medium, which was explained by H-spill-over between platinum and tungsten carbide.en
dc.publisherElsevier
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172054/RS//
dc.rightsrestrictedAccess
dc.sourceJournal of Electroanalytical Chemistry
dc.subjectHydrogen oxidationen
dc.subjectMechanismen
dc.subjectTungsten carbideen
dc.subjectPlatinum catalysten
dc.titleThe kinetics of the hydrogen oxidation reaction on WC/Pt catalyst with low content of Pt nano-particlesen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractГојковиц, С. Љ.; Елезовић, Невенка Р.; Ерциус, П.; Радмиловиц, В. Р.; Врацар, Љ. Д.; Крстајић, Недељко В.; Обрадовић, Маја;
dc.citation.volume671
dc.citation.spage24
dc.citation.epage32
dc.citation.other671: 24-32
dc.citation.rankM22
dc.identifier.doi10.1016/j.jelechem.2012.01.026
dc.identifier.rcubConv_2799
dc.identifier.scopus2-s2.0-84858132501
dc.identifier.wos000304215100004
dc.type.versionpublishedVersion


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