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Oxygen reduction on a ruthenium electrode in alkaline electrolytes
dc.creator | Anastasijević, Nikola A. | |
dc.creator | Dimitrijević, Z. M. | |
dc.creator | Adžić, Radoslav R. | |
dc.date.accessioned | 2021-02-04T11:13:10Z | |
dc.date.available | 2021-02-04T11:13:10Z | |
dc.date.issued | 1986 | |
dc.identifier.issn | 0022-0728 | |
dc.identifier.issn | 1572-6657 | |
dc.identifier.uri | https://cer.ihtm.bg.ac.rs/handle/123456789/4200 | |
dc.description.abstract | The kinetics of oxygen reduction have been studied on a ruthenium electrode in alkaline solutions using the rotating disc and rotating disc-ring methods. The reaction kinetics and mechanism were found to depend on the oxidation state of the ruthenium surface. For a surface having up to two monolayers of oxide a "parallel" mechanism of O2 reduction has been found, which goes predominantly through a four-electron direct reduction to OH-. All the rate constants of the O2 and HO-2 reactions, including those of the adsorption equilibrium of HO-2 on the Ru surface, have been determined. No catalytic decomposition of HO-2 was found. Although the Tafel slope is higher than -120 mV/dec it appears that an initial electron exchange is the rate-determining step. The kinetics are slower on a Ru surface with a thicker oxide layer. The mechanism of the reaction is also different, showing a potential-dependent ratio of the rate constants for a direct and series reduction of O2 and a catalytic decomposition of HO-2. | sr |
dc.language.iso | en | sr |
dc.publisher | Elsevier | sr |
dc.relation | Research Fund of SR Serbia, Yugoslavia | sr |
dc.relation | The National Science Foundation, U.S.A., Contract No. 471 | sr |
dc.rights | restrictedAccess | sr |
dc.source | Journal of Electroanalytical Chemistry | sr |
dc.subject | oxygen reduction | sr |
dc.subject | ruthenium | sr |
dc.subject | Kinetics | sr |
dc.subject | ruthenium electrode | sr |
dc.subject | rotating disc method | sr |
dc.subject | rotating disc-ring method | sr |
dc.title | Oxygen reduction on a ruthenium electrode in alkaline electrolytes | sr |
dc.type | article | sr |
dc.rights.license | ARR | sr |
dcterms.abstract | Aнастасијевић, Никола A.; Димитријевић, З. М.; Aджић, Радослав Р.; | |
dc.citation.volume | 199 | |
dc.citation.issue | 2 | |
dc.citation.spage | 351 | |
dc.citation.epage | 364 | |
dc.identifier.doi | 10.1016/0022-0728(86)80009-2 | |
dc.identifier.scopus | 2-s2.0-33750140996 | |
dc.type.version | publishedVersion | sr |