Synthesis and characterization of MoOx-Pt/C and TiOx-Pt/C nano-catalysts for oxygen reduction
Samo za registrovane korisnike
2009
Autori
Elezović, Nevenka R.Babić, Biljana M.
Radmilović, Velimir R
Vračar, Ljiljana M
Krstajić, Nedeljko V
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
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 cataly...sts 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.
Ključne reči:
TiOx-Pt/C catalyst / Oxygen reduction reaction / Nanoparticles / MoOx-Pt/C catalyst / Acid solutionIzvor:
Electrochimica Acta, 2009, 54, 9, 2404-2409Izdavač:
- Pergamon-Elsevier Science Ltd, Oxford
Finansiranje / projekti:
- Sinteza, karakterizacija i primena nanostruktuiranih katalizatora na različitim nosačima u gorivnim spregovima, elektrolizi vode i elektroorganskoj sintezi (RS-MESTD-MPN2006-2010-142038)
DOI: 10.1016/j.electacta.2008.03.015
ISSN: 0013-4686
WoS: 000264743900002
Scopus: 2-s2.0-61449084812
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Elezović, Nevenka R. AU - Babić, Biljana M. AU - Radmilović, Velimir R AU - Vračar, Ljiljana M AU - Krstajić, Nedeljko V PY - 2009 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5540 AB - 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. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - Electrochimica Acta T1 - Synthesis and characterization of MoOx-Pt/C and TiOx-Pt/C nano-catalysts for oxygen reduction EP - 2409 IS - 9 SP - 2404 VL - 54 DO - 10.1016/j.electacta.2008.03.015 ER -
@article{ author = "Elezović, Nevenka R. and Babić, Biljana M. and Radmilović, Velimir R and Vračar, Ljiljana M and Krstajić, Nedeljko V", year = "2009", 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.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "Electrochimica Acta", title = "Synthesis and characterization of MoOx-Pt/C and TiOx-Pt/C nano-catalysts for oxygen reduction", pages = "2409-2404", number = "9", volume = "54", doi = "10.1016/j.electacta.2008.03.015" }
Elezović, N. R., Babić, B. M., Radmilović, V. R., Vračar, L. M.,& Krstajić, N. V.. (2009). Synthesis and characterization of MoOx-Pt/C and TiOx-Pt/C nano-catalysts for oxygen reduction. in Electrochimica Acta Pergamon-Elsevier Science Ltd, Oxford., 54(9), 2404-2409. https://doi.org/10.1016/j.electacta.2008.03.015
Elezović NR, Babić BM, Radmilović VR, Vračar LM, Krstajić NV. Synthesis and characterization of MoOx-Pt/C and TiOx-Pt/C nano-catalysts for oxygen reduction. in Electrochimica Acta. 2009;54(9):2404-2409. doi:10.1016/j.electacta.2008.03.015 .
Elezović, Nevenka R., Babić, Biljana M., Radmilović, Velimir R, Vračar, Ljiljana M, Krstajić, Nedeljko V, "Synthesis and characterization of MoOx-Pt/C and TiOx-Pt/C nano-catalysts for oxygen reduction" in Electrochimica Acta, 54, no. 9 (2009):2404-2409, https://doi.org/10.1016/j.electacta.2008.03.015 . .