Electrocatalytic oxidation of methanol on polypyrrole film modified with platinum microparticles

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1837808· OSTI ID:533109

Yang, H; Lu, T ^[1]; Xue, K ^[2]; Sun, S; Lu, G; Chen, S ^[3]

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1. Chinese Academy of Sciences, Changchun (China). Changchun Inst. of Applied Chemistry
2. Nanjing Normal Univ. (China). Dept. of Chemistry
3. Xiamen Univ. (China). Dept. of Chemistry

The electrocatalytic oxidation of methanol on polypyrrole (PPy) film modified with platinum microparticles has been studied by means of electrochemical and in situ Fourier transform infrared techniques. The Pt microparticles, which were incorporated in the PPy film by the technique of cyclic voltammetry, were uniformly dispersed. The modified electrode exhibits significant electrocatalytic activity for the oxidation of methanol. The catalytic activities were found to be dependent on Pt loading and the thickness of the PPy film. The linearly adsorbed CO species is the only intermediate of electrochemical oxidation of methanol and can be readily oxidized at the modified electrodes. The enhanced electrocatalytic activities may be due to the uniform dispersion of Pt microparticles in the PPy film and the synergistic effects of the highly dispersed Pt microparticles and the PPy film. Finally, a reaction mechanism is suggested.

• Sponsoring Organization: USDOE
• OSTI ID: 533109
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 7 Vol. 144; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
30 DIRECT ENERGY CONVERSION
ALCOHOL FUEL CELLS
CARBON MONOXIDE
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
ELECTROCATALYSTS
METHANOL
OXIDATION
PLATINUM
PYRROLES