Mass transfer effect in electrochemical oxidation of methanol at platinum electrocatalysts
Abstract
The influence of the mass transfer on the electrochemical oxidation of methanol was investigated at a rotating disk electrode with smooth polycrystalline Pt and high area carbon supported Pt (Pt/C) as the electrocatalysts. It was found that the reaction rate at the smooth Pt is suppressed significantly by the convection of the electrolyte. The Tafel slope and the reaction order with respect to methanol were also influenced by the convection of the electrolyte. On the contrary, mass transfer influenced neither the reaction rate nor the kinetic parameters of methanol oxidation at the Pt/C electrocatalyst. It was proposed that a reaction path via formaldehyde as a soluble intermediate is operative at both electrocatalysts, but with hindered diffusion of formaldehyde from the corrugated surface of the Pt/C.
Keywords:
methanol / electrochemical oxidation / platinum / platinum-supported catalyst / rotating disk electrode / fuel cellSource:
Journal of Electroanalytical Chemistry, 2004, 573, 2, 271-276Publisher:
- Elsevier Science Sa, Lausanne
DOI: 10.1016/j.jelechem.2004.07.013
ISSN: 1572-6657
WoS: 000224907100007
Scopus: 2-s2.0-7444241482
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Gojković, Snežana Lj. PY - 2004 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/697 AB - The influence of the mass transfer on the electrochemical oxidation of methanol was investigated at a rotating disk electrode with smooth polycrystalline Pt and high area carbon supported Pt (Pt/C) as the electrocatalysts. It was found that the reaction rate at the smooth Pt is suppressed significantly by the convection of the electrolyte. The Tafel slope and the reaction order with respect to methanol were also influenced by the convection of the electrolyte. On the contrary, mass transfer influenced neither the reaction rate nor the kinetic parameters of methanol oxidation at the Pt/C electrocatalyst. It was proposed that a reaction path via formaldehyde as a soluble intermediate is operative at both electrocatalysts, but with hindered diffusion of formaldehyde from the corrugated surface of the Pt/C. PB - Elsevier Science Sa, Lausanne T2 - Journal of Electroanalytical Chemistry T1 - Mass transfer effect in electrochemical oxidation of methanol at platinum electrocatalysts EP - 276 IS - 2 SP - 271 VL - 573 DO - 10.1016/j.jelechem.2004.07.013 ER -
@article{ author = "Gojković, Snežana Lj.", year = "2004", abstract = "The influence of the mass transfer on the electrochemical oxidation of methanol was investigated at a rotating disk electrode with smooth polycrystalline Pt and high area carbon supported Pt (Pt/C) as the electrocatalysts. It was found that the reaction rate at the smooth Pt is suppressed significantly by the convection of the electrolyte. The Tafel slope and the reaction order with respect to methanol were also influenced by the convection of the electrolyte. On the contrary, mass transfer influenced neither the reaction rate nor the kinetic parameters of methanol oxidation at the Pt/C electrocatalyst. It was proposed that a reaction path via formaldehyde as a soluble intermediate is operative at both electrocatalysts, but with hindered diffusion of formaldehyde from the corrugated surface of the Pt/C.", publisher = "Elsevier Science Sa, Lausanne", journal = "Journal of Electroanalytical Chemistry", title = "Mass transfer effect in electrochemical oxidation of methanol at platinum electrocatalysts", pages = "276-271", number = "2", volume = "573", doi = "10.1016/j.jelechem.2004.07.013" }
Gojković, S. Lj.. (2004). Mass transfer effect in electrochemical oxidation of methanol at platinum electrocatalysts. in Journal of Electroanalytical Chemistry Elsevier Science Sa, Lausanne., 573(2), 271-276. https://doi.org/10.1016/j.jelechem.2004.07.013
Gojković SL. Mass transfer effect in electrochemical oxidation of methanol at platinum electrocatalysts. in Journal of Electroanalytical Chemistry. 2004;573(2):271-276. doi:10.1016/j.jelechem.2004.07.013 .
Gojković, Snežana Lj., "Mass transfer effect in electrochemical oxidation of methanol at platinum electrocatalysts" in Journal of Electroanalytical Chemistry, 573, no. 2 (2004):271-276, https://doi.org/10.1016/j.jelechem.2004.07.013 . .