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Convective Instability of the Limiting Current of the Triiodide Reduction in an Electrolytic Cell with Horizontal Electrodes

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Abstract

The instability of the limiting current of cathodic reaction in the system I– 3 – I–– Pt with excess of KI is studied experimentally in a cell with two horizontal one-side electrodes. The observed velocity oscillation fluctuations at average frequency of about 0.01 Hz are typical for convective instability of solution within a boundary layer of the cathode whose working surface faces upward. The limits of existence of different types of convective instability in the system are determined in a Cartesian space of partial Rayleigh numbers for solution components KI and I2.

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Authors and Affiliations

  1. Institute of Chemistry of Solutions, Russian Academy of Sciences, Akademicheskaya 1, Ivanovo, 153045, Russia

    E. E. Morgunova

  2. Frumkin Institute of Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 117071, Russia

    L. A. Reznikova, A. P. Grigin & A. D. Davydov

Authors
  1. E. E. Morgunova
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  2. L. A. Reznikova
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  3. A. P. Grigin
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  4. A. D. Davydov
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Morgunova, E.E., Reznikova, L.A., Grigin, A.P. et al. Convective Instability of the Limiting Current of the Triiodide Reduction in an Electrolytic Cell with Horizontal Electrodes. Russian Journal of Electrochemistry 37, 982–986 (2001). https://doi.org/10.1023/A:1011916914884

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