dc.creator | Elezović, Nevenka R. | |
dc.creator | Babić, Biljana M. | |
dc.creator | Krstajić, Nedeljko V | |
dc.creator | Gojković, Snežana Lj | |
dc.creator | Vračar, Ljiljana M | |
dc.date.accessioned | 2022-04-05T14:17:47Z | |
dc.date.available | 2022-04-05T14:17:47Z | |
dc.date.issued | 2008 | |
dc.identifier.issn | 0352-5139 | |
dc.identifier.uri | http://rimsi.imsi.bg.ac.rs/handle/123456789/290 | |
dc.description.abstract | The temperature dependence of oxygen reduction reaction (ORR) was studied on highly dispersed Pt nanoparticles supported on a carbon cryogel. The specific surface area of the support was 5 17 m(2) g(-1), the Pt particles diameter was about 2.7 nm and the loading of the catalyst was 20 wt. %. The kinetics of the ORR at the Pt/C electrode was examined in 0.50 mol dm(-3) HClO4 solution in the temperature range from 274 to 318 K. At all temperatures, two distinct E-log j regions were observed at low current densities with a slope of -2.3RT/F and at high current densities with a slope of -2.3 x 2RT/F. In order to confirm the mechanism of oxygen reduction previously suggested at a polycrystalline Pt and a Pt/Ebonex nanostructured electrode, the apparent enthalpies of activation at selected potentials vs. the reversible hydrogen electrode were calculated in both current density regions. Although Delta H-a,l(not equal) > Delta H-a,h(not equal), it was found that the enthalpies of activation at the zero Galvani potential difference were the same and hence it could be concluded that the rate-determining step of the ORR was the same in both current density regions. The synthesized Pt/C catalyst showed a small enhancement in the catalytic activity for ORR in comparison to the polycrystalline Pt, but no change in the mechanism of the reaction. | en |
dc.publisher | Srpsko hemijsko društvo, Beograd | |
dc.relation | info:eu-repo/grantAgreement/MESTD/MPN2006-2010/142038/RS// | |
dc.rights | openAccess | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.source | Journal of the Serbian Chemical Society | |
dc.subject | temperature dependence | en |
dc.subject | platinum catalyst | en |
dc.subject | oxygen reduction reaction | en |
dc.subject | enthalpy of activation | en |
dc.subject | carbon support | en |
dc.title | Temperature dependence of the kinetics of oxygen reduction on carbon-supported Pt nanoparticles | en |
dc.type | article | |
dc.rights.license | BY-NC-ND | |
dc.citation.epage | 654 | |
dc.citation.issue | 6 | |
dc.citation.other | 73(6): 641-654 | |
dc.citation.rank | M23 | |
dc.citation.spage | 641 | |
dc.citation.volume | 73 | |
dc.identifier.doi | 10.2298/JSC0806641E | |
dc.identifier.fulltext | http://rimsi.imsi.bg.ac.rs/bitstream/id/547/287.pdf | |
dc.identifier.scopus | 2-s2.0-47049105414 | |
dc.identifier.wos | 000258789700005 | |
dc.type.version | publishedVersion | |