Electrocatalysis by nanoparticles - Oxygen reduction on Ebonex/Pt electrode
Само за регистроване кориснике
2006
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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.
Кључне речи:
Ebonex support / Ebonex/Pt catalyst / Oxygen reduction reactionИзвор:
Journal of Electroanalytical Chemistry, 2006, 587, 1, 99-107Издавач:
- Elsevier
Финансирање / пројекти:
- 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).
DOI: 10.1016/j.jelechem.2005.10.021
ISSN: 1572-6657
WoS: 000234631400012
Scopus: 2-s2.0-29344469270
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Vračar, Lj.M. AU - Krstajić, Nedeljko V. AU - Radmilović, V.R. AU - Jakšić, M.M. PY - 2006 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5442 AB - 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. PB - Elsevier T2 - Journal of Electroanalytical Chemistry T1 - Electrocatalysis by nanoparticles - Oxygen reduction on Ebonex/Pt electrode EP - 107 IS - 1 SP - 99 VL - 587 DO - 10.1016/j.jelechem.2005.10.021 ER -
@article{ author = "Vračar, Lj.M. and Krstajić, Nedeljko V. and Radmilović, V.R. and Jakšić, M.M.", year = "2006", 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.", publisher = "Elsevier", journal = "Journal of Electroanalytical Chemistry", title = "Electrocatalysis by nanoparticles - Oxygen reduction on Ebonex/Pt electrode", pages = "107-99", number = "1", volume = "587", doi = "10.1016/j.jelechem.2005.10.021" }
Vračar, Lj.M., Krstajić, N. V., Radmilović, V.R.,& Jakšić, M.M.. (2006). Electrocatalysis by nanoparticles - Oxygen reduction on Ebonex/Pt electrode. in Journal of Electroanalytical Chemistry Elsevier., 587(1), 99-107. https://doi.org/10.1016/j.jelechem.2005.10.021
Vračar L, Krstajić NV, Radmilović V, Jakšić M. Electrocatalysis by nanoparticles - Oxygen reduction on Ebonex/Pt electrode. in Journal of Electroanalytical Chemistry. 2006;587(1):99-107. doi:10.1016/j.jelechem.2005.10.021 .
Vračar, Lj.M., Krstajić, Nedeljko V., Radmilović, V.R., Jakšić, M.M., "Electrocatalysis by nanoparticles - Oxygen reduction on Ebonex/Pt electrode" in Journal of Electroanalytical Chemistry, 587, no. 1 (2006):99-107, https://doi.org/10.1016/j.jelechem.2005.10.021 . .