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Oxygen reduction on Au (100) and vicinal Au (910) and Au (11, 1, 1) faces in alkaline solution. A rotating disc-ring study
dc.creator | Štrbac, Svetlana | |
dc.creator | Anastasijević, Nikola A. | |
dc.creator | Adžić, Radoslav R. | |
dc.date.accessioned | 2021-02-08T14:24:28Z | |
dc.date.available | 2021-02-08T14:24:28Z | |
dc.date.issued | 1992 | |
dc.identifier.issn | 0022-0728 | |
dc.identifier.issn | 1572-6657 | |
dc.identifier.uri | https://cer.ihtm.bg.ac.rs/handle/123456789/4211 | |
dc.description.abstract | The kinetics of oxygen reduction have been studied on Au (100) and vicinal Au (910) and Au (11, 1, 1) faces in 0.1 M NaOH by a rotating disc-ring method. A very high activity of these surfaces for O2 reduction was demonstrated. The reaction involves a four-electron reduction without HO2- reaching the ring electrode in the presence of the AuOH-(1-λ2) layer on the Au (100) surface. At more negative potentials, as θAuOH → 0, a four-electron reduction takes place in an interactive pathway, followed by a two-electron series pathway and, at very large overpotentials, by a four-electron series pathway. The first electron transfer is the rate-determining step for all three faces. For vicinal faces, the region of the four-electron reduction is reduced due to the smaller region of AuOH formation. Evidence for the surface diffusion of HO2- was found from analysis of the disc-ring data. There were also indications for the splitting of the OO bond by AuOH in the region of the four-electron reduction. Maps of the reaction pathways have been constructed. | sr |
dc.language.iso | en | sr |
dc.publisher | Elsevier | sr |
dc.relation | The Research Fund of S.R. Serbia, Yugoslavia | sr |
dc.relation | The National Science Foundation, Washington,D C, USA through the Yugoslav-American Fund, Contract No. 966. | sr |
dc.rights | restrictedAccess | sr |
dc.source | Journal of Electroanalytical Chemistry | sr |
dc.subject | kinetics of oxygen reduction | sr |
dc.subject | rotating disc-ring method | sr |
dc.subject | Ring disk electrode | sr |
dc.subject | Electrochemical reaction | sr |
dc.title | Oxygen reduction on Au (100) and vicinal Au (910) and Au (11, 1, 1) faces in alkaline solution. A rotating disc-ring study | sr |
dc.type | article | sr |
dc.rights.license | ARR | sr |
dcterms.abstract | Штрбац, Светлана; Aнастасијевић, Никола A.; Aджић, Радослав Р.; | |
dc.citation.volume | 323 | |
dc.citation.issue | 1-2 | |
dc.citation.spage | 179 | |
dc.citation.epage | 195 | |
dc.identifier.doi | 10.1016/0022-0728(92)80010-2 | |
dc.identifier.scopus | 2-s2.0-0000712739 | |
dc.type.version | publishedVersion | sr |