Methanol electrooxidation on supported Pt and PtRu catalysts in acid and alkaline solutions
Само за регистроване кориснике
2002
Аутори
Tripković, AmalijaPopović, Ksenija
Grgur, Branimir
Blizanac, B.
Ross, P.N.
Marković, Nenad M.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The kinetics of methanol oxidation on supported 47.5 wt.% Pt and 54 wt.% Pt-Ru (with nominal Pt:Ru ratios of 2:3) catalysts are measured in 0.5 M H2SO4 and 0.1 NaOH at 295 and 333 K using thin-film rotating disk electrode (RDE) method. It was found that the activity of Pt and Pt-Ru for methanol oxidation is a strong function of pH of solution and temperature. The kinetics are much higher in alkaline than in acid solution; at 333 K, a factor of 30 for Pt and a factor of 20 for Pt2Ru3 at 0.5 V. The pH effect is attributed to the pH competitive adsorption of oxygenated species with anions from supporting electrolytes. The activity of Pt and Pt2Ru3 catalysts at 333 K is higher (a factor of 5) than at 295 K. Irrespective of pH, only negligible differences in the kinetics are observed between Pt and on high Ru content Pt alloys, presumably owing to a slow rate of methanol dehydrogenation on the Rurich surface and insufficient number of Pt sites required for dissociative chemisorption of meth...anol.
Кључне речи:
rotating disk electrode (RDE) / Pt-Ru alloy / transmission electron microscopy (TEM) / X-ray diffraction (XRD)Извор:
Electrochimica Acta, 2002, 47, 22-23, 3707-3714Издавач:
- Pergamon-Elsevier Science Ltd, Oxford
DOI: 10.1016/S0013-4686(02)00340-7
ISSN: 0013-4686
WoS: 000178071500013
Scopus: 2-s2.0-0037200196
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Tripković, Amalija AU - Popović, Ksenija AU - Grgur, Branimir AU - Blizanac, B. AU - Ross, P.N. AU - Marković, Nenad M. PY - 2002 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/456 AB - The kinetics of methanol oxidation on supported 47.5 wt.% Pt and 54 wt.% Pt-Ru (with nominal Pt:Ru ratios of 2:3) catalysts are measured in 0.5 M H2SO4 and 0.1 NaOH at 295 and 333 K using thin-film rotating disk electrode (RDE) method. It was found that the activity of Pt and Pt-Ru for methanol oxidation is a strong function of pH of solution and temperature. The kinetics are much higher in alkaline than in acid solution; at 333 K, a factor of 30 for Pt and a factor of 20 for Pt2Ru3 at 0.5 V. The pH effect is attributed to the pH competitive adsorption of oxygenated species with anions from supporting electrolytes. The activity of Pt and Pt2Ru3 catalysts at 333 K is higher (a factor of 5) than at 295 K. Irrespective of pH, only negligible differences in the kinetics are observed between Pt and on high Ru content Pt alloys, presumably owing to a slow rate of methanol dehydrogenation on the Rurich surface and insufficient number of Pt sites required for dissociative chemisorption of methanol. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - Electrochimica Acta T1 - Methanol electrooxidation on supported Pt and PtRu catalysts in acid and alkaline solutions EP - 3714 IS - 22-23 SP - 3707 VL - 47 DO - 10.1016/S0013-4686(02)00340-7 ER -
@article{ author = "Tripković, Amalija and Popović, Ksenija and Grgur, Branimir and Blizanac, B. and Ross, P.N. and Marković, Nenad M.", year = "2002", abstract = "The kinetics of methanol oxidation on supported 47.5 wt.% Pt and 54 wt.% Pt-Ru (with nominal Pt:Ru ratios of 2:3) catalysts are measured in 0.5 M H2SO4 and 0.1 NaOH at 295 and 333 K using thin-film rotating disk electrode (RDE) method. It was found that the activity of Pt and Pt-Ru for methanol oxidation is a strong function of pH of solution and temperature. The kinetics are much higher in alkaline than in acid solution; at 333 K, a factor of 30 for Pt and a factor of 20 for Pt2Ru3 at 0.5 V. The pH effect is attributed to the pH competitive adsorption of oxygenated species with anions from supporting electrolytes. The activity of Pt and Pt2Ru3 catalysts at 333 K is higher (a factor of 5) than at 295 K. Irrespective of pH, only negligible differences in the kinetics are observed between Pt and on high Ru content Pt alloys, presumably owing to a slow rate of methanol dehydrogenation on the Rurich surface and insufficient number of Pt sites required for dissociative chemisorption of methanol.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "Electrochimica Acta", title = "Methanol electrooxidation on supported Pt and PtRu catalysts in acid and alkaline solutions", pages = "3714-3707", number = "22-23", volume = "47", doi = "10.1016/S0013-4686(02)00340-7" }
Tripković, A., Popović, K., Grgur, B., Blizanac, B., Ross, P.N.,& Marković, N. M.. (2002). Methanol electrooxidation on supported Pt and PtRu catalysts in acid and alkaline solutions. in Electrochimica Acta Pergamon-Elsevier Science Ltd, Oxford., 47(22-23), 3707-3714. https://doi.org/10.1016/S0013-4686(02)00340-7
Tripković A, Popović K, Grgur B, Blizanac B, Ross P, Marković NM. Methanol electrooxidation on supported Pt and PtRu catalysts in acid and alkaline solutions. in Electrochimica Acta. 2002;47(22-23):3707-3714. doi:10.1016/S0013-4686(02)00340-7 .
Tripković, Amalija, Popović, Ksenija, Grgur, Branimir, Blizanac, B., Ross, P.N., Marković, Nenad M., "Methanol electrooxidation on supported Pt and PtRu catalysts in acid and alkaline solutions" in Electrochimica Acta, 47, no. 22-23 (2002):3707-3714, https://doi.org/10.1016/S0013-4686(02)00340-7 . .