Kinetic study of methanol oxidation on Pt2Ru3/C catalyst in the alkaline media
Kinetika oksidacije metanola na Pt2Ru3/C katalizatoru u alkalnoj sredini
Abstract
The electrochemical oxidation of methanol in NaOH solution was examined on a thin film Pt2Ru3/C electrode. The XRD pattern revealed that the Pt2Ru3 alloy consisted of a solid solution of Ru in Pt and a small amount of Ru or a solid solution of Pt in Ru. It was shown that in alkaline solution, the difference in activity between Pt/C and Pt2Ru3/C is significantly smaller than in acid solution. It is proposed that the reaction follows a quasi bifunctional mechanism. The kinetic parameters indicated that the chemical reaction between adsorbed COad and OHad species could be the rate limiting step.
Elektrohemijska oksidacija metanola ispitivana je na nanokatalizatoru Pt2Ru3 dispergovanom na aktivnom uglju kao nosaču u alkalnoj sredini. Katalizator je karakterisan difrakcijom X-zraka (XRD) i dobijeni rezultati su pokazali da se legura Pt2Ru3 sastoji od dve faze: čvrstog rastvora Ru u Pt i od malih količina čistog Ru ili čvrstog rastvora Pt u Ru. Poređenjem aktivnosti Pt/C i Pt2Ru3/C katalizatora u oksidaciji metanola u alkalnoj sredini, pokazano je da je ta razlika znatno manja nego u kiseloj sredini. Predložen je kvazi-bifunkcionalni mehanizam reakcije. Dobijeni kinetički parametri ukazuju na to da je hemijska reakcija između adsorbovanih COad i OHad čestica spori stupanj u oksidaciji metanola na Pt2Ru3/C katalizatoru u alkalnoj sredini.
Keywords:
platinum-ruthenium alloy / supported nanocatalyst / XRD analysis / methanoloxidation / alkaline solutionSource:
Journal of the Serbian Chemical Society, 2007, 72, 11, 1095-1101Publisher:
- Serbian Chemical Society
Funding / projects:
Collections
Institution/Community
IHTMTY - JOUR AU - Tripković, Amalija AU - Popović, Ksenija AU - Lović, Jelena PY - 2007 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/290 AB - The electrochemical oxidation of methanol in NaOH solution was examined on a thin film Pt2Ru3/C electrode. The XRD pattern revealed that the Pt2Ru3 alloy consisted of a solid solution of Ru in Pt and a small amount of Ru or a solid solution of Pt in Ru. It was shown that in alkaline solution, the difference in activity between Pt/C and Pt2Ru3/C is significantly smaller than in acid solution. It is proposed that the reaction follows a quasi bifunctional mechanism. The kinetic parameters indicated that the chemical reaction between adsorbed COad and OHad species could be the rate limiting step. AB - Elektrohemijska oksidacija metanola ispitivana je na nanokatalizatoru Pt2Ru3 dispergovanom na aktivnom uglju kao nosaču u alkalnoj sredini. Katalizator je karakterisan difrakcijom X-zraka (XRD) i dobijeni rezultati su pokazali da se legura Pt2Ru3 sastoji od dve faze: čvrstog rastvora Ru u Pt i od malih količina čistog Ru ili čvrstog rastvora Pt u Ru. Poređenjem aktivnosti Pt/C i Pt2Ru3/C katalizatora u oksidaciji metanola u alkalnoj sredini, pokazano je da je ta razlika znatno manja nego u kiseloj sredini. Predložen je kvazi-bifunkcionalni mehanizam reakcije. Dobijeni kinetički parametri ukazuju na to da je hemijska reakcija između adsorbovanih COad i OHad čestica spori stupanj u oksidaciji metanola na Pt2Ru3/C katalizatoru u alkalnoj sredini. PB - Serbian Chemical Society T2 - Journal of the Serbian Chemical Society T1 - Kinetic study of methanol oxidation on Pt2Ru3/C catalyst in the alkaline media T1 - Kinetika oksidacije metanola na Pt2Ru3/C katalizatoru u alkalnoj sredini VL - 72 IS - 11 SP - 1095 EP - 1101 DO - 10.2298/JSC0711095T ER -
@article{ author = "Tripković, Amalija and Popović, Ksenija and Lović, Jelena", year = "2007", abstract = "The electrochemical oxidation of methanol in NaOH solution was examined on a thin film Pt2Ru3/C electrode. The XRD pattern revealed that the Pt2Ru3 alloy consisted of a solid solution of Ru in Pt and a small amount of Ru or a solid solution of Pt in Ru. It was shown that in alkaline solution, the difference in activity between Pt/C and Pt2Ru3/C is significantly smaller than in acid solution. It is proposed that the reaction follows a quasi bifunctional mechanism. The kinetic parameters indicated that the chemical reaction between adsorbed COad and OHad species could be the rate limiting step., Elektrohemijska oksidacija metanola ispitivana je na nanokatalizatoru Pt2Ru3 dispergovanom na aktivnom uglju kao nosaču u alkalnoj sredini. Katalizator je karakterisan difrakcijom X-zraka (XRD) i dobijeni rezultati su pokazali da se legura Pt2Ru3 sastoji od dve faze: čvrstog rastvora Ru u Pt i od malih količina čistog Ru ili čvrstog rastvora Pt u Ru. Poređenjem aktivnosti Pt/C i Pt2Ru3/C katalizatora u oksidaciji metanola u alkalnoj sredini, pokazano je da je ta razlika znatno manja nego u kiseloj sredini. Predložen je kvazi-bifunkcionalni mehanizam reakcije. Dobijeni kinetički parametri ukazuju na to da je hemijska reakcija između adsorbovanih COad i OHad čestica spori stupanj u oksidaciji metanola na Pt2Ru3/C katalizatoru u alkalnoj sredini.", publisher = "Serbian Chemical Society", journal = "Journal of the Serbian Chemical Society", title = "Kinetic study of methanol oxidation on Pt2Ru3/C catalyst in the alkaline media, Kinetika oksidacije metanola na Pt2Ru3/C katalizatoru u alkalnoj sredini", volume = "72", number = "11", pages = "1095-1101", doi = "10.2298/JSC0711095T" }
Tripković, A., Popović, K.,& Lović, J.. (2007). Kinetic study of methanol oxidation on Pt2Ru3/C catalyst in the alkaline media. in Journal of the Serbian Chemical Society Serbian Chemical Society., 72(11), 1095-1101. https://doi.org/10.2298/JSC0711095T
Tripković A, Popović K, Lović J. Kinetic study of methanol oxidation on Pt2Ru3/C catalyst in the alkaline media. in Journal of the Serbian Chemical Society. 2007;72(11):1095-1101. doi:10.2298/JSC0711095T .
Tripković, Amalija, Popović, Ksenija, Lović, Jelena, "Kinetic study of methanol oxidation on Pt2Ru3/C catalyst in the alkaline media" in Journal of the Serbian Chemical Society, 72, no. 11 (2007):1095-1101, https://doi.org/10.2298/JSC0711095T . .