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Electrocatalysis by nanoparticles - Oxygen reduction on Ebonex/Pt electrode
dc.creator | Vračar, Lj.M. | |
dc.creator | Krstajić, Nedeljko V. | |
dc.creator | Radmilović, V.R. | |
dc.creator | Jakšić, M.M. | |
dc.date.accessioned | 2023-01-17T14:36:15Z | |
dc.date.available | 2023-01-17T14:36:15Z | |
dc.date.issued | 2006 | |
dc.identifier.issn | 1572-6657 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5442 | |
dc.description.abstract | The oxygen reduction reaction was studied in 0.5 mol dm-3 HClO4 solution on an electrode based on Ebonex-supported platinum electrocatalyst applied on rotation Au disk electrode (Au/Ebonex/Pt). Pt catalyst was prepared by impregnation method from 2-propanol solution of Pt(NH3)2(NO2)2 and Ebonex powder. Ebonex support (non-stoichiometric mixture of titanium oxides) was characterized by: X-ray diffraction, energy dispersive X-ray spectroscopy and BET techniques. The synthesized catalyst was analysed by TEM technique. The kinetics of oxygen reduction reaction on the Ebonex/Pt catalyst shows a significant enhancement in comparison with the same on polycrystalline Pt. Only a single Tafel slope of -0.106 V dec-1 is observed and the first-rate determining step in direct four-electron reduction is proposed as a main partway in the whole range of potential. The absence of PtOH layer, that inhibits oxygen reduction on polycrystalline Pt, was discussed through synergetic effect into the catalyst as a consequence of the interactions of Pt nanoparticles with Ebonex, on one hand, and, through the d-band coupling model where the surface reactivity is given by the energy shift of the surface d-states with respect to the Fermi level, on the other hand. | sr |
dc.language.iso | en | sr |
dc.publisher | Elsevier | sr |
dc.relation | The present study was supported by Knowledge Innovation Programs of Chinese Academy of Sciences (KZCX2-YW-BR-16), the Na tion al Natural Sciences Foundation of China (NO. 40901036, 31070467), and the Fundamental Research Funds for the Central Universities (NO. 2008-10008). | sr |
dc.rights | restrictedAccess | sr |
dc.source | Journal of Electroanalytical Chemistry | sr |
dc.subject | Ebonex support | sr |
dc.subject | Ebonex/Pt catalyst | sr |
dc.subject | Oxygen reduction reaction | sr |
dc.title | Electrocatalysis by nanoparticles - Oxygen reduction on Ebonex/Pt electrode | sr |
dc.type | article | sr |
dc.rights.license | ARR | sr |
dc.citation.epage | 107 | |
dc.citation.issue | 1 | |
dc.citation.spage | 99 | |
dc.citation.volume | 587 | |
dc.identifier.doi | 10.1016/j.jelechem.2005.10.021 | |
dc.identifier.scopus | 2-s2.0-29344469270 | |
dc.identifier.wos | 000234631400012 | |
dc.type.version | publishedVersion | sr |