Kinetic study of methanol oxidation on carbon-supported PtRu electrocatalyst
Apstrakt
Methanol electrooxidation was investigated on the carbon-supported PtRu electrocatalyst (1:1 atomic ratio) in acid media. X-ray diffraction measurement indicated alloying of Pt and Ru. Cyclic voltammetry of the sample reflects the amount of Ruin the catalyst and its ability to adsorb OH radicals. Tafel plots for the oxidation of 0.02-3 M methanol in the solutions containing 0.05-1 M HClO4 and in the temperature range 27-40 degreesC showed reasonably well-defined linear region with the slope of about 115 mV dec(-1) at the low currents, irrespective of the experimental conditions employed. Reaction order with respect to methanol was found to be 0.5. A correlation between methanol oxidation rate and pseudocapacitive current of OH adsorption on Ru sites was established. It was proposed that bifunctional mechanism is operative with the reaction between methanol residues adsorbed on Pt sites and OH radicals adsorbed on Ru sites as the rate-determining step. (C) 2003 Elsevier Ltd. All rights ...reserved.
Ključne reči:
electrochemical oxidation / methanol / platinum-ruthenium-supported catalyst / fuel cell catalystIzvor:
Electrochimica Acta, 2003, 48, 24, 3607-3614
DOI: 10.1016/S0013-4686(03)00481-X
ISSN: 0013-4686; 1873-3859
WoS: 000185674600004
Scopus: 2-s2.0-0141569819
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Gojković, SL AU - Vidakovic, TR AU - Durovic, DR PY - 2003 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2674 AB - Methanol electrooxidation was investigated on the carbon-supported PtRu electrocatalyst (1:1 atomic ratio) in acid media. X-ray diffraction measurement indicated alloying of Pt and Ru. Cyclic voltammetry of the sample reflects the amount of Ruin the catalyst and its ability to adsorb OH radicals. Tafel plots for the oxidation of 0.02-3 M methanol in the solutions containing 0.05-1 M HClO4 and in the temperature range 27-40 degreesC showed reasonably well-defined linear region with the slope of about 115 mV dec(-1) at the low currents, irrespective of the experimental conditions employed. Reaction order with respect to methanol was found to be 0.5. A correlation between methanol oxidation rate and pseudocapacitive current of OH adsorption on Ru sites was established. It was proposed that bifunctional mechanism is operative with the reaction between methanol residues adsorbed on Pt sites and OH radicals adsorbed on Ru sites as the rate-determining step. (C) 2003 Elsevier Ltd. All rights reserved. T2 - Electrochimica Acta T1 - Kinetic study of methanol oxidation on carbon-supported PtRu electrocatalyst VL - 48 IS - 24 SP - 3607 EP - 3614 DO - 10.1016/S0013-4686(03)00481-X ER -
@article{ author = "Gojković, SL and Vidakovic, TR and Durovic, DR", year = "2003", abstract = "Methanol electrooxidation was investigated on the carbon-supported PtRu electrocatalyst (1:1 atomic ratio) in acid media. X-ray diffraction measurement indicated alloying of Pt and Ru. Cyclic voltammetry of the sample reflects the amount of Ruin the catalyst and its ability to adsorb OH radicals. Tafel plots for the oxidation of 0.02-3 M methanol in the solutions containing 0.05-1 M HClO4 and in the temperature range 27-40 degreesC showed reasonably well-defined linear region with the slope of about 115 mV dec(-1) at the low currents, irrespective of the experimental conditions employed. Reaction order with respect to methanol was found to be 0.5. A correlation between methanol oxidation rate and pseudocapacitive current of OH adsorption on Ru sites was established. It was proposed that bifunctional mechanism is operative with the reaction between methanol residues adsorbed on Pt sites and OH radicals adsorbed on Ru sites as the rate-determining step. (C) 2003 Elsevier Ltd. All rights reserved.", journal = "Electrochimica Acta", title = "Kinetic study of methanol oxidation on carbon-supported PtRu electrocatalyst", volume = "48", number = "24", pages = "3607-3614", doi = "10.1016/S0013-4686(03)00481-X" }
Gojković, S., Vidakovic, T.,& Durovic, D.. (2003). Kinetic study of methanol oxidation on carbon-supported PtRu electrocatalyst. in Electrochimica Acta, 48(24), 3607-3614. https://doi.org/10.1016/S0013-4686(03)00481-X
Gojković S, Vidakovic T, Durovic D. Kinetic study of methanol oxidation on carbon-supported PtRu electrocatalyst. in Electrochimica Acta. 2003;48(24):3607-3614. doi:10.1016/S0013-4686(03)00481-X .
Gojković, SL, Vidakovic, TR, Durovic, DR, "Kinetic study of methanol oxidation on carbon-supported PtRu electrocatalyst" in Electrochimica Acta, 48, no. 24 (2003):3607-3614, https://doi.org/10.1016/S0013-4686(03)00481-X . .