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In situ FTIRS studies of the electrocatalytic oxidation of ethanol on Pt alloy electrodes

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Abstract

Ethanol oxidation on Pt–Os and Pt–Ru–Os alloy electrodes was investigated by electrochemical and spectroelectrochemical techniques. Cyclic voltammetry and chronoamperometric results showed that the Pt–Os alloy has the highest current density at lower potentials. Linear COads, acetic acid, acetaldehyde, and CO2 were identified as reaction intermediates and/or products by single potential alteration infrared reflectance spectroscopy and subtractively normalized interfacial Fourier transform infrared reflectance spectroscopy techniques. The in situ Fourier transform infrared spectroscopy results showed that the electrooxidative adsorption of ethanol was dissociative providing COads at low potentials.

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Acknowledgments

This work was mainly conducted under the framework of a collaborative program CAPES/COFECUB under grant no. 498/05/07. D. M. dos Anjos thanks CAPES for the Ph.D. fellowship. G. Tremiliosi-Filho acknowledge FAPESP and CNPq (Brazil) for the financial support.

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Authors and Affiliations

  1. Instituto de Química de São Carlos, Universidade de São Paulo, Caixa Postal 780, 13560-970, São Carlos, SP, Brazil

    D. M. dos Anjos & G. Tremiliosi-Filho

  2. Equipe Electrocatalyse, UMR 6503, CNRS, Université de Poitiers, 40, Avenue du Recteur Pineau, 86022, Poitiers Cedex, France

    D. M. dos Anjos, F. Hahn, J.-M. Léger & K. B. Kokoh

Authors
  1. D. M. dos Anjos
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  2. F. Hahn
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  3. J.-M. Léger
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  4. K. B. Kokoh
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  5. G. Tremiliosi-Filho
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Corresponding author

Correspondence to G. Tremiliosi-Filho.

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Dedicated to our friend Professor Francisco Carlos Nart (in memorium), IQSC-USP, Brazil.

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dos Anjos, D.M., Hahn, F., Léger, JM. et al. In situ FTIRS studies of the electrocatalytic oxidation of ethanol on Pt alloy electrodes. J Solid State Electrochem 11, 1567–1573 (2007). https://doi.org/10.1007/s10008-007-0360-y

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  • DOI: https://doi.org/10.1007/s10008-007-0360-y

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