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Adsorption from a Layer of Finite Thickness on a Planar Electrode

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Abstract

Within the Nernst diffusion model, the effect the convection has on the adsorption at a planar electrode is studied for the case of a diffusion-controlled stage of adsorption and the behavior of the Frumkin–Melik–Gaikazyan finite adsorption impedance is analyzed. Allowing for the convection leads to new functional frequency dependences of constituents of this impedance at low frequencies, where the active constituent depends on the diffusion layer thickness more heavily than the capacitive one. During adsorption of neutral molecules from a layer of finite thickness, an additional relaxation time emerges in an electrochemical system, which results from a finite rate of motion of species in the near-electrode layer. Ignoring the convection may lead to erroneous interpretation of the adsorption mechanism.

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Authors and Affiliations

  1. Institute of General and Inorganic Chemistry, National Academy of Sciences of Ukraine, pr. Akademika Palladina 32-34, 03680, Kiev, 142, Ukraine

    V. V. Pototskaya

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  1. V. V. Pototskaya
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Pototskaya, V.V. Adsorption from a Layer of Finite Thickness on a Planar Electrode. Russian Journal of Electrochemistry 39, 365–369 (2003). https://doi.org/10.1023/A:1023353821111

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  • DOI: https://doi.org/10.1023/A:1023353821111

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