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Synthesis and characterization of MoOx-Pt/C and TiOx-Pt/C nano-catalysts for oxygen reduction
dc.creator | Elezović, Nevenka R. | |
dc.creator | Babić, Biljana M. | |
dc.creator | Radmilović, Velimir R | |
dc.creator | Vračar, Ljiljana M | |
dc.creator | Krstajić, Nedeljko V | |
dc.date.accessioned | 2022-04-05T14:21:47Z | |
dc.date.accessioned | 2023-01-19T11:50:43Z | |
dc.date.available | 2022-04-05T14:21:47Z | |
dc.date.available | 2023-01-19T11:50:43Z | |
dc.date.issued | 2009 | |
dc.identifier.issn | 0013-4686 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5540 | |
dc.description.abstract | The oxygen reduction reaction (ORR) was studied at carbon supported MoOx-Pt/C and TiOx-Pt nanocatalysts in 0.5 mol dm(-3) HClO4 solution, at 25 degrees C. The MoOx-Pt/C and TiOx-Pt/C catalysts were prepared by the polyole method combined by MoOx or TiOx post-deposition. Home made catalysts were characterized by TEM and EDX techniques. It was found that catalyst nanoparticles were homogenously distributed over the carbon support with a mean particle size about 2.5 nm. Quite similar distribution and particle size was previously obtained for Pt/C catalyst. Results confirmed that MoOx and TiOx post-deposition did not lead to a significant growth of the Pt nanoparticles. The ORR kinetics was investigated by cyclic voltammetry and linear sweep voltammetry at the rotating disc electrode. These results showed the existence of two E - logj regions, usually observed with polycrystalline Pt in acid solution. It was proposed that the main path in the ORR mechanism on MoOx-Pt/C and TiOx-Pt/C catalysts was the direct four-electron process with the transfer of the first electron as the rate-determining step. The increase in catalytic activity for ORR on MoOx-Pt/C and TiOx-Pt/C catalysts, in comparison with Pt/C catalyst, was explained by synergetic effects due to the formation of the interface between the platinum and oxide materials and by spillover due to the surface diffusion of oxygen reaction intermediates. | en |
dc.publisher | Pergamon-Elsevier Science Ltd, Oxford | |
dc.relation | info:eu-repo/grantAgreement/MESTD/MPN2006-2010/142038/RS// | |
dc.rights | restrictedAccess | |
dc.source | Electrochimica Acta | |
dc.subject | TiOx-Pt/C catalyst | en |
dc.subject | Oxygen reduction reaction | en |
dc.subject | Nanoparticles | en |
dc.subject | MoOx-Pt/C catalyst | en |
dc.subject | Acid solution | en |
dc.title | Synthesis and characterization of MoOx-Pt/C and TiOx-Pt/C nano-catalysts for oxygen reduction | en |
dc.type | article | |
dc.rights.license | ARR | |
dc.citation.epage | 2409 | |
dc.citation.issue | 9 | |
dc.citation.other | 54(9): 2404-2409 | |
dc.citation.rank | M21 | |
dc.citation.spage | 2404 | |
dc.citation.volume | 54 | |
dc.identifier.doi | 10.1016/j.electacta.2008.03.015 | |
dc.identifier.scopus | 2-s2.0-61449084812 | |
dc.identifier.wos | 000264743900002 | |
dc.type.version | publishedVersion |