The kinetics and mechanism of methanol oxidation on Pt and PtRu catalysts in alkaline and acid media | Zendy

Jelena D. Lović | Zendy

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The kinetics and mechanism of methanol oxidation on Pt and PtRu catalysts in alkaline and acid media

Author(s) -

Jelena D. Lović

Publication year - 2007

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc0707709l

Subject(s) - platinum , catalysis , methanol , ruthenium , chemistry , inorganic chemistry , electrochemistry , platinum nanoparticles , kinetics , reaction mechanism , adsorption , electrode , organic chemistry , physics , quantum mechanics

The kinetic of methanol electrochemical oxidation for a series of platinum and platinum-ruthenium catalysts was investigated. A correlation between the beginning of OH ad adsorption and methanol oxidation was demonstarated on Pt single crystals and Pt nanocatalyst. The activity of the nano-structured Pt catalyst was compared with single crystal platinum electrodes assuming the Kinoshita model of nanoparticles. The ruthenium-containing catalysts shifted the onset of methanol oxidation to more negative potentials. The effect was more pronounced in acid than in alkaline media. Based on the established diagnostic criteria, the reaction between CO ad and OH ad species according to the Langmuir-Hinshelwood mechanism was proposed as the rate determining step in alkaline and acid media on Pt and PtRu catalysts.

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