Приказ основних података о документу

dc.creatorŠtrbac, Svetlana
dc.creatorSrejić, Irina
dc.creatorSmiljanić, Milutin
dc.creatorRakočević, Zlatko Lj.
dc.date.accessioned2019-01-30T17:34:23Z
dc.date.available2019-01-30T17:34:23Z
dc.date.issued2013
dc.identifier.issn1572-6657
dc.identifier.urihttps://cer.ihtm.bg.ac.rs/handle/123456789/1187
dc.description.abstractThe effect of spontaneously deposited rhodium nanoislands on the electrocatalytic activity of polycrystalline gold, Au(poly), for oxygen reduction reaction (ORR) was studied using rotating disc electrode technique in 0.1 M HClO4 solution. Surface topography atomic force microscopy (AFM) images of obtained Rh/Au(poly) surfaces revealed that both the size and coverage of rhodium nanoislands increase with the deposition time, for a given depositing conditions. The exact values of rhodium coverage ranging from 50% to the full coverage, and the qualitative changes in the surface chemical composition with respect to bare gold were estimated from phase AFM images. Deposited Rh was also identified by the changes in cyclic voltammetry (CV) profiles from which potential limits for ORR were determined. Obtained Rh/Au(poly) surfaces have shown a significant shift of the initial potential for ORR to the more positive potentials with respect to pure gold already for 50% Rh coverage, indicating that a pronounced electronic effect is responsible for the lowering of the activation energy for oxygen adsorption. The initial potential increases only slightly with the further increase of Rh coverage. Reaction pathway changes from 2e- reduction at lower overpotentials to a partial 4e- reduction at higher overpotentials. The later is attributed to the increased activity of obtained Rh/Au(poly) surfaces towards hydrogen peroxide reduction (HPRR), which appear as an intermediate during ORR. The fraction of 4e- reduction slightly increases with the increase of Rh coverage.en
dc.publisherElsevier
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45005/RS//
dc.rightsrestrictedAccess
dc.sourceJournal of Electroanalytical Chemistry
dc.subjectGolden
dc.subjectRhodiumen
dc.subjectAFMen
dc.subjectRDEen
dc.subjectOxygen reductionen
dc.titleThe effect of rhodium nanoislands on the electrocatalytic activity of gold for oxygen reduction in perchloric acid solutionen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractШтрбац, Светлана; Срејић, Ирина; Ракочевић, Златко Љ.; Смиљанић, Милутин;
dc.citation.volume704
dc.citation.spage24
dc.citation.epage31
dc.citation.other704: 24-31
dc.citation.rankM21
dc.identifier.doi10.1016/j.jelechem.2013.06.003
dc.identifier.scopus2-s2.0-84880051771
dc.identifier.wos000324658700004
dc.type.versionpublishedVersion


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Приказ основних података о документу