Activity of carbon supported Pt3Ru2 nanocatalyst in CO oxidation

• Published in: Journal of the Serbian Chemical Society Vol. 74; no. 8-9; pp. 965 - 975
• Main Authors: Popović Ksenija Đ., Lović Jelena D., Tripković Amalija V., Olszewski Piotr K.
• Format: Journal Article
• Language: English
• Published: Serbian Chemical Society 01-01-2009
• Subjects: anion effect; co oxidation; ph effect; pt3ru2/c nanocatalyst; xrd
• ISSN: 0352-5139; 1820-7421
• DOI: 10.2298/JSC0909965P

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.