The electrocatalytic activity of Pt3Ru2/C nanocatalyst toward the electro-oxidation of bulk CO was examined in acid and alkaline solution at ambient temperature using the thin-film, rotating disk electrode (RDE) method. The catalyst was characterized by XRD analysis. The XRD pattern revealed that the Pt3Ru2/C catalyst consisted of two structures, i.e., Pt-Ru-fcc and Ruhcp (a solid solution of Ru in Pt and a small amount of Ru or a solid solution of Pt in Ru). Electrocatalytic activities were measured by applying potentiodynamic and steady state techniques. The oxidation of CO on the Pt3Ru2/C catalyst was influenced by pH and anions from the supporting electrolytes. The Pt3Ru2/C was more active in alkaline than in acid solution, as well as in perchloric than in sulfuric acid. Comparison of CO oxidation on Pt3Ru2/C and Pt/C revealed that the Pt3Ru2/C was more active than Pt/C in acid solution, while both catalysts had a similar activity in alkaline solution.
Elektrohemijska oksidacija CO ispitivana je na nanokatalizatoru Pt3Ru2 dispergovanom na aktivnom uglju kao nosaču u kiseloj i alkalnoj sredini na sobnoj temperaturi korišćenjem metode rotirajuće disk elektrode (RDE). Katalizator je okarakterisan difrakcijom X-zraka (XRD) i dobijeni rezultati su pokazali da se legura Pt3Ru2 sastoji od dve faze: čvrstog rastvora Ru u Pt i od malih količina čistog Ru ili čvrstog rastvora Pt u Ru. Elektrokatalitička aktivnost ovog katalizatora za oksidaciju CO je ispitivana cik- ličnom voltametrijom i pokazan je efekat pH i efekat anjona iz nosećeg elektrolita. Pt3Ru2/C katalizator je aktivniji u alkalnoj nego u kiseloj sredini, ukazujući na činjenicu da u alkaliji Pt može da adsorbuje OH čestice na isto tako niskim potencijalima kao i Ru i na taj način ubrzava reakciju oksidacije CO u poređenju sa kiselinom. Pokazano je da adsorpcija bisulfatnih anjona iz nosećeg elektrolita pomera početni potencijal reakcije ka pozitivnijim vrednostima i smanjuje brzinu ...oksidacije CO. Poređenjem aktivnosti Pt/C i Pt3Ru2/C katalizatora u oksidaciji CO u kiseloj i alkalnij sredini pokazano je da je ta razlika znatno manja u alkalnoj nego u kiseloj sredini.
TY - JOUR
AU - Popović, Ksenija
AU - Lović, Jelena
AU - Tripković, Amalija
AU - Olszewski, Piotr K.
PY - 2009
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/513
AB - The electrocatalytic activity of Pt3Ru2/C nanocatalyst toward the electro-oxidation of bulk CO was examined in acid and alkaline solution at ambient temperature using the thin-film, rotating disk electrode (RDE) method. The catalyst was characterized by XRD analysis. The XRD pattern revealed that the Pt3Ru2/C catalyst consisted of two structures, i.e., Pt-Ru-fcc and Ruhcp (a solid solution of Ru in Pt and a small amount of Ru or a solid solution of Pt in Ru). Electrocatalytic activities were measured by applying potentiodynamic and steady state techniques. The oxidation of CO on the Pt3Ru2/C catalyst was influenced by pH and anions from the supporting electrolytes. The Pt3Ru2/C was more active in alkaline than in acid solution, as well as in perchloric than in sulfuric acid. Comparison of CO oxidation on Pt3Ru2/C and Pt/C revealed that the Pt3Ru2/C was more active than Pt/C in acid solution, while both catalysts had a similar activity in alkaline solution.
AB - Elektrohemijska oksidacija CO ispitivana je na nanokatalizatoru Pt3Ru2 dispergovanom na aktivnom uglju kao nosaču u kiseloj i alkalnoj sredini na sobnoj temperaturi korišćenjem metode rotirajuće disk elektrode (RDE). Katalizator je okarakterisan difrakcijom X-zraka (XRD) i dobijeni rezultati su pokazali da se legura Pt3Ru2 sastoji od dve faze: čvrstog rastvora Ru u Pt i od malih količina čistog Ru ili čvrstog rastvora Pt u Ru. Elektrokatalitička aktivnost ovog katalizatora za oksidaciju CO je ispitivana cik- ličnom voltametrijom i pokazan je efekat pH i efekat anjona iz nosećeg elektrolita. Pt3Ru2/C katalizator je aktivniji u alkalnoj nego u kiseloj sredini, ukazujući na činjenicu da u alkaliji Pt može da adsorbuje OH čestice na isto tako niskim potencijalima kao i Ru i na taj način ubrzava reakciju oksidacije CO u poređenju sa kiselinom. Pokazano je da adsorpcija bisulfatnih anjona iz nosećeg elektrolita pomera početni potencijal reakcije ka pozitivnijim vrednostima i smanjuje brzinu oksidacije CO. Poređenjem aktivnosti Pt/C i Pt3Ru2/C katalizatora u oksidaciji CO u kiseloj i alkalnij sredini pokazano je da je ta razlika znatno manja u alkalnoj nego u kiseloj sredini.
PB - Serbian Chemical Society
T2 - Journal of the Serbian Chemical Society
T1 - Activity of carbon supported Pt3Ru2 nanocatalyst in CO oxidation
T1 - Aktivnost Pt3Ru2/C nanokatalizatora u oksidaciji CO
VL - 74
IS - 8-9
SP - 965
EP - 975
DO - 10.2298/JSC0909965P
ER -
@article{
author = "Popović, Ksenija and Lović, Jelena and Tripković, Amalija and Olszewski, Piotr K.",
year = "2009",
abstract = "The electrocatalytic activity of Pt3Ru2/C nanocatalyst toward the electro-oxidation of bulk CO was examined in acid and alkaline solution at ambient temperature using the thin-film, rotating disk electrode (RDE) method. The catalyst was characterized by XRD analysis. The XRD pattern revealed that the Pt3Ru2/C catalyst consisted of two structures, i.e., Pt-Ru-fcc and Ruhcp (a solid solution of Ru in Pt and a small amount of Ru or a solid solution of Pt in Ru). Electrocatalytic activities were measured by applying potentiodynamic and steady state techniques. The oxidation of CO on the Pt3Ru2/C catalyst was influenced by pH and anions from the supporting electrolytes. The Pt3Ru2/C was more active in alkaline than in acid solution, as well as in perchloric than in sulfuric acid. Comparison of CO oxidation on Pt3Ru2/C and Pt/C revealed that the Pt3Ru2/C was more active than Pt/C in acid solution, while both catalysts had a similar activity in alkaline solution., Elektrohemijska oksidacija CO ispitivana je na nanokatalizatoru Pt3Ru2 dispergovanom na aktivnom uglju kao nosaču u kiseloj i alkalnoj sredini na sobnoj temperaturi korišćenjem metode rotirajuće disk elektrode (RDE). Katalizator je okarakterisan difrakcijom X-zraka (XRD) i dobijeni rezultati su pokazali da se legura Pt3Ru2 sastoji od dve faze: čvrstog rastvora Ru u Pt i od malih količina čistog Ru ili čvrstog rastvora Pt u Ru. Elektrokatalitička aktivnost ovog katalizatora za oksidaciju CO je ispitivana cik- ličnom voltametrijom i pokazan je efekat pH i efekat anjona iz nosećeg elektrolita. Pt3Ru2/C katalizator je aktivniji u alkalnoj nego u kiseloj sredini, ukazujući na činjenicu da u alkaliji Pt može da adsorbuje OH čestice na isto tako niskim potencijalima kao i Ru i na taj način ubrzava reakciju oksidacije CO u poređenju sa kiselinom. Pokazano je da adsorpcija bisulfatnih anjona iz nosećeg elektrolita pomera početni potencijal reakcije ka pozitivnijim vrednostima i smanjuje brzinu oksidacije CO. Poređenjem aktivnosti Pt/C i Pt3Ru2/C katalizatora u oksidaciji CO u kiseloj i alkalnij sredini pokazano je da je ta razlika znatno manja u alkalnoj nego u kiseloj sredini.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Activity of carbon supported Pt3Ru2 nanocatalyst in CO oxidation, Aktivnost Pt3Ru2/C nanokatalizatora u oksidaciji CO",
volume = "74",
number = "8-9",
pages = "965-975",
doi = "10.2298/JSC0909965P"
}
Popović, K., Lović, J., Tripković, A.,& Olszewski, P. K.. (2009). Activity of carbon supported Pt3Ru2 nanocatalyst in CO oxidation. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 74(8-9), 965-975.
https://doi.org/10.2298/JSC0909965P
Popović K, Lović J, Tripković A, Olszewski PK. Activity of carbon supported Pt3Ru2 nanocatalyst in CO oxidation. in Journal of the Serbian Chemical Society. 2009;74(8-9):965-975.
doi:10.2298/JSC0909965P .
Popović, Ksenija, Lović, Jelena, Tripković, Amalija, Olszewski, Piotr K., "Activity of carbon supported Pt3Ru2 nanocatalyst in CO oxidation" in Journal of the Serbian Chemical Society, 74, no. 8-9 (2009):965-975,
https://doi.org/10.2298/JSC0909965P . .
