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On stability of model electrocatalytic process with frumkin adsorption isotherm occurring on spherical electrode

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Abstract

The method of impedance spectroscopy was used for theoretical studies of the conditions of appearance of Hopf instability in a model electrochemical system with a preceding homogeneous chemical reaction in the Nernst diffusion layer and electrocatalytic reaction on the spherical electrode surface under potentiostatic conditions. It is shown within the suggested electrochemical instability model based on the potential-dependent adsorption/desorption that the effective rate of the preceding homogeneous chemical reaction may affect the system stability. The effect diminishes at a decrease in the electrode radius. The instability region grows at an increase in the thickness of the Nernst diffusion layer.

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Authors and Affiliations

  1. Vernadskii Institute of General and Inorganic Chemistry, National Academy of Sciences of Ukraine, Kiev, Ukraine

    V. V. Pototskaya

  2. Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, Kiev, Ukraine

    O. I. Gichan

Authors
  1. V. V. Pototskaya
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  2. O. I. Gichan
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Corresponding authors

Correspondence to V. V. Pototskaya or O. I. Gichan.

Additional information

Original Russian Text © V.V. Pototskaya, O.I. Gichan, 2012, published in Elektrokhimiya, 2012, Vol. 48, No. 2, pp. 171–180.

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Pototskaya, V.V., Gichan, O.I. On stability of model electrocatalytic process with frumkin adsorption isotherm occurring on spherical electrode. Russ J Electrochem 48, 154–162 (2012). https://doi.org/10.1134/S1023193512020140

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  • DOI: https://doi.org/10.1134/S1023193512020140

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