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Electrocatalysis of Methanol Oxidation on Polypyrrole Electropolymerized on Aluminum Alloy 1100

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Abstract

In this paper, electrochemical evidences of the stability and catalytical ability of polypyrrole-modified (PPy) electrode formed on aluminum alloy 1100 for methanol electrooxidation are presented. The PPy films were synthesized potentiostatically with different charges. Cyclic voltammetry showed that the electrochemical window for a PPy-modified electrode started at −1.0 V (saturated calomel electrode, SCE) and finished at 1.80 V (SCE) in aqueous 0.10 mol L−1 of KClO4. This large potential range, not usual in aqueous medium, was important during the electrooxidation studies of methanol in order to determine the best potential for methanol electrooxidation. The chemical and physical stability of the film was evident during the process. Electrochemical methods were conclusive in showing that the adsorbed species formed on the electrode surface during the electrooxidation process do not inhibit the catalytical activity of the film.

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Acknowledgments

The authors gratefully acknowledge Conselho Nacional de Desenvolvimento Científico e Tecnológico for financially supporting this study.

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Authors and Affiliations

  1. Instituto de Química da Universidade Federal do Rio Grande do Sul, Caixa Postal 15049, CEP 91501-970, Porto Alegre, Rio Grande do Sul, Brazil

    Viviane Dalmoro, Denise S. Azambuja & Reinaldo Simões Gonçalves

  2. Departamento de Química do Instituto Federal Sul-Rio-Grandense, Praça Vinte de Setembro 455, CEP 96015, Pelotas, Rio Grande do Sul, Brazil

    Kátia R. L. Castagno

Authors
  1. Viviane Dalmoro
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  2. Kátia R. L. Castagno
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  3. Denise S. Azambuja
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  4. Reinaldo Simões Gonçalves
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Correspondence to Reinaldo Simões Gonçalves.

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Dalmoro, V., Castagno, K.R.L., Azambuja, D.S. et al. Electrocatalysis of Methanol Oxidation on Polypyrrole Electropolymerized on Aluminum Alloy 1100. Electrocatal 2, 263–267 (2011). https://doi.org/10.1007/s12678-011-0061-2

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  • DOI: https://doi.org/10.1007/s12678-011-0061-2

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