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Electrooxidation of methanol on polyaniline without dispersed catalyst particles

Prasad, Rajendra K and Munichandraiah, N (2002) Electrooxidation of methanol on polyaniline without dispersed catalyst particles. In: Journal of Power Sources, 103 (2). pp. 300-304.

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Electrooxidation of methanol in $H_2SO_4$ is studied on platinum and polyaniline (PANI) deposited platinum electrodes by cyclic voltammetry. In contrast to reports in the literature, which suggest the need of fine particles of a catalyst dispersed in PANI matrix for occurrence of electrooxidation of $CH_3OH$, in the present study, the reaction is shown to take place on PANI without additional catalyst particles at CH3OH concentrations higher than 1 M. At lower concentrations, adsorption of $CH_3OH$occurs on PANI resulting in a reduction in intrinsic voltammetric peak currents of PANI in $H_2SO_4$. The kinetics of adsorption follows Langmuir isotherm. By a comparison of cyclic voltammetric peak currents of methanol on platinum and PANI deposited platinum electrodes, the catalytic efficiency of PANI towards oxidation of $CH_3OH$ is evaluated.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Adsorption;Catalysis;Electrooxidation;Methanol;Polyaniline
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: Sahana R Sahini
Date Deposited: 09 Feb 2007
Last Modified: 19 Sep 2010 04:28
URI: http://eprints.iisc.ac.in/id/eprint/7463

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