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dc.creatorMarković, NM
dc.creatorGasteiger, HA
dc.creatorGrgur, Branimir
dc.creatorRoss, PN
dc.date.accessioned2021-03-10T09:48:52Z
dc.date.available2021-03-10T09:48:52Z
dc.date.issued1999
dc.identifier.issn0022-0728
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/251
dc.description.abstractUsing the rotating ring-disk technique (RRDE) the oxygen reduction reaction (orr) was studied on the Pt(111) surface in the presence of Br- anions. We found that the orr at the Pt(111) \ Br-ad interface is always accompanied quantitatively by H2O2 oxidation currents on the ring electrode, implying that in the presence of Br- anions the orr does not proceed entirely through the 4e(-) reduction pathway, as in the Br--free solution. We propose that strongly adsorbed Br- can simultaneously suppress both the adsorption of the O-2 molecule and the formation of pairs of platinum sites needed for the breaking of the O-O bond. Besides elucidating the effects of Br-ad, these studies also shed some light on the role of OHad on the kinetics of the orr on the Pt(111) surface in solution free of Br anions. We have developed a theoretical model and from simulations of I-E curves we propose two modes of action of the OHad state on the kinetics of the orr on the Pt(111) surface: (i) OHad can block the adsorption of O-2 on active platinum sites, i.e. they compete for the same sites, and (ii) OHad can alter the adsorption energy of intermediates which are formed during the orr on the bare Pt sites adjacent to the OHad.en
dc.publisherElsevier Science Sa, Lausanne
dc.rightsrestrictedAccess
dc.sourceJournal of Electroanalytical Chemistry
dc.subjectoxygen reduction reactionen
dc.subjectbromideen
dc.subjectrotating ring-disk techniqueen
dc.titleOxygen reduction reaction on Pt(111): effects of bromideen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage163
dc.citation.issue1-2
dc.citation.other467(1-2): 157-163
dc.citation.rankM22
dc.citation.spage157
dc.citation.volume467
dc.identifier.doi10.1016/S0022-0728(99)00020-0
dc.identifier.rcubconv_2015
dc.identifier.scopus2-s2.0-0032628566
dc.identifier.wos000082614000017
dc.type.versionpublishedVersion


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