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dc.creatorMarković, NM
dc.creatorGrgur, Branimir
dc.creatorLucas, CA
dc.creatorRoss, PN
dc.date.accessioned2021-03-10T09:45:07Z
dc.date.available2021-03-10T09:45:07Z
dc.date.issued1998
dc.identifier.issn0956-5000
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/194
dc.description.abstractThe underpotential deposition (UPD) of Pb onto Pt(100) in pure perchloric acid and in solution containing Br- was examined by classical rotating ring disk electrode (RRDPt(100)E) electrochemical methods in combination with in-situ surface X-ray scattering measurements. The total amount of Pb deposited underpotentially in 0.1 M HClO4 is approximate to 0.62 +/- 5% ML (1 ML equals 1 Pb atom per Pt surface atom), nearly equivalent to a close-packed monolayer of fully discharged Pb adatoms, e.g. 0.63 ML. In pure perchloric acid, deposition of Pb adatoms is accompanied by complete displacement of OHad from the Pt(100) surface, and in the potential range 0.15 V lt E lt 0.35 V we found an ordered surface structure with a c(2 x 2) unit cell. In perchloric acid containing bromide, the maximum Pb-upd surface coverage is approximate to 0.5 ML; the deposition of 0.5 ML of Pb adatoms is accompanied by desorption of about 0.22 ML of the Br-ad adsorbed on the Pt surface at 0.6 V (ca. 0.42 ML). Thus, Pb UPD on Pt(100) from solution containing Br- is a competitive process, with the total amount of Pb deposited at underpotential being less than the amount needed to form a close-packed monolayer. As a consequence, the formation of an ordered c(2 x 2) structure is observed only at E lt 0.15 V.en
dc.publisherRoyal Soc Chemistry, Cambridge
dc.rightsrestrictedAccess
dc.sourceJournal of the Chemical Society-Faraday Transactions
dc.titleUnderpotential deposition of lead onto Pt(100) in acid solutions: Adsorption isotherms and interface structuresen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage3379
dc.citation.issue22
dc.citation.other94(22): 3373-3379
dc.citation.rankM22
dc.citation.spage3373
dc.citation.volume94
dc.identifier.doi10.1039/a804620d
dc.identifier.rcubconv_1939
dc.identifier.scopus2-s2.0-33748613479
dc.identifier.wos000077082700012
dc.type.versionpublishedVersion


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