Effect of temperature on the methanol oxidation at supported Pt and PtRu catalysts in alkaline solution
Abstract
The effect of temperature on the kinetics of methanol oxidation on supported 47.5 wt% Pt, 54 and 33.5 wt% Pt/Ru catalysts was studied in 0.1 M NaOH at 295, 313 and 333 K using thin-film rotating disk electrode (RDE) method. The catalysts were characterized by ex situ STM prior to the voltammetric studies. It was found that the activity of those catalysts for methanol oxidation was determined by a delicate balance between the surface coverage by COad and by OHad species. Significantly faster kinetics at higher temperatures clearly indicates that methanol oxidation at the catalysts studied is highly activated process. The highest effect of temperature is obtained at the least active Pt catalyst which has the highest activation energy. On the contrary, the smallest temperature effect is detected on the most active Pt3Ru2 catalyst having the lowest activation energy. These phenomena have been explained by the important role of the adsorption energies of both reactive intermediates (COad an...d OHad).
Keywords:
RDE / Pt-catalyst / Pt/Ru-catalysts / STM / effect of temperatureSource:
Electrochemistry Communications, 2003, 5, 6, 484-490Publisher:
- Elsevier
DOI: 10.1016/S1388-2481(03)00111-5
ISSN: 1388-2481
WoS: 000183591400010
Scopus: 2-s2.0-0037937608
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Institution/Community
IHTMTY - JOUR AU - Tripković, Amalija AU - Štrbac, Svetlana AU - Popović, Ksenija PY - 2003 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/129 AB - The effect of temperature on the kinetics of methanol oxidation on supported 47.5 wt% Pt, 54 and 33.5 wt% Pt/Ru catalysts was studied in 0.1 M NaOH at 295, 313 and 333 K using thin-film rotating disk electrode (RDE) method. The catalysts were characterized by ex situ STM prior to the voltammetric studies. It was found that the activity of those catalysts for methanol oxidation was determined by a delicate balance between the surface coverage by COad and by OHad species. Significantly faster kinetics at higher temperatures clearly indicates that methanol oxidation at the catalysts studied is highly activated process. The highest effect of temperature is obtained at the least active Pt catalyst which has the highest activation energy. On the contrary, the smallest temperature effect is detected on the most active Pt3Ru2 catalyst having the lowest activation energy. These phenomena have been explained by the important role of the adsorption energies of both reactive intermediates (COad and OHad). PB - Elsevier T2 - Electrochemistry Communications T1 - Effect of temperature on the methanol oxidation at supported Pt and PtRu catalysts in alkaline solution VL - 5 IS - 6 SP - 484 EP - 490 DO - 10.1016/S1388-2481(03)00111-5 ER -
@article{ author = "Tripković, Amalija and Štrbac, Svetlana and Popović, Ksenija", year = "2003", abstract = "The effect of temperature on the kinetics of methanol oxidation on supported 47.5 wt% Pt, 54 and 33.5 wt% Pt/Ru catalysts was studied in 0.1 M NaOH at 295, 313 and 333 K using thin-film rotating disk electrode (RDE) method. The catalysts were characterized by ex situ STM prior to the voltammetric studies. It was found that the activity of those catalysts for methanol oxidation was determined by a delicate balance between the surface coverage by COad and by OHad species. Significantly faster kinetics at higher temperatures clearly indicates that methanol oxidation at the catalysts studied is highly activated process. The highest effect of temperature is obtained at the least active Pt catalyst which has the highest activation energy. On the contrary, the smallest temperature effect is detected on the most active Pt3Ru2 catalyst having the lowest activation energy. These phenomena have been explained by the important role of the adsorption energies of both reactive intermediates (COad and OHad).", publisher = "Elsevier", journal = "Electrochemistry Communications", title = "Effect of temperature on the methanol oxidation at supported Pt and PtRu catalysts in alkaline solution", volume = "5", number = "6", pages = "484-490", doi = "10.1016/S1388-2481(03)00111-5" }
Tripković, A., Štrbac, S.,& Popović, K.. (2003). Effect of temperature on the methanol oxidation at supported Pt and PtRu catalysts in alkaline solution. in Electrochemistry Communications Elsevier., 5(6), 484-490. https://doi.org/10.1016/S1388-2481(03)00111-5
Tripković A, Štrbac S, Popović K. Effect of temperature on the methanol oxidation at supported Pt and PtRu catalysts in alkaline solution. in Electrochemistry Communications. 2003;5(6):484-490. doi:10.1016/S1388-2481(03)00111-5 .
Tripković, Amalija, Štrbac, Svetlana, Popović, Ksenija, "Effect of temperature on the methanol oxidation at supported Pt and PtRu catalysts in alkaline solution" in Electrochemistry Communications, 5, no. 6 (2003):484-490, https://doi.org/10.1016/S1388-2481(03)00111-5 . .