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Electrocatalytic oxidation of methanol on Cu modified polyaniline electrode in alkaline medium

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Abstract

Electrolytically deposited Cu on polyaniline film covered Pt substrate (Cu/PANI/Pt) is used as anode for the electrooxidation of methanol in alkaline medium. The electrochemical behavior and electrocatalytic activity of the electrode were characterized using cyclic voltammetry, impedance spectroscopy, chronomethods, rotating disc voltammetry and polarization studies. The morphology and composition of the modified film were obtained using SEM and EDAX techniques. The electrooxidation of methanol in NaOH is found to be more efficient on Cu/PANI/Pt than on bare Cu (Cu), electrodeposited Cu on Cu (Cu/Cu) and electrodeposited Cu on Pt (Cu/Pt) substrates. Partial chemical displacement of dispersed Cu on PANI with Pt or Pd further improved its performance towards methanol oxidation.

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Acknowledgements

This work was supported by UGC-DRS Programme (Phase-IV) in Chemistry, Bangalore University, Bangalore, India.

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  1. Department of Studies in Chemistry, Bangalore University, Central College Campus, Bangalore, 560001, India

    K. L. Nagashree & M. F. Ahmed

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  1. K. L. Nagashree
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  2. M. F. Ahmed
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Correspondence to M. F. Ahmed.

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Nagashree, K.L., Ahmed, M.F. Electrocatalytic oxidation of methanol on Cu modified polyaniline electrode in alkaline medium. J Appl Electrochem 39, 403–410 (2009). https://doi.org/10.1007/s10800-008-9685-1

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