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Coadsorption of Halide Anions and 1-Adamantanol Molecules on a Mercury Electrode

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Abstract

Coadsorption of 1-adamantanol (AdOH) and halide anions (F–, Cl–, Br–) at the Hg/H2O interface is studied systematically. Experimental results are compared with calculations of these systems within a modified Alekseev–Popov–Kolotyrkin model complemented by a set of two Frumkin isotherms. A satisfactory agreement between experimental data and theoretical conclusions concerning dependences of the phase transition potentials and the adsorption-desorption potentials on the concentrations of supporting electrolyte and organic substances is established. The experimental and calculated potential dependences of the differential capacitance in the phase transition region in the case of the AdOH adsorption from electrolytes containing halide anions are compared. It is shown that the shape of experimental capacitance curves corresponds to either a weak attraction of species of different nature during concurrent adsorption or the absence of lateral interaction between them. Accounting for the contribution made by the energy of the diffuse double layer to the overall energy gain during the adsorption removes seeming contradictions in the interpretation of dependences studied.

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Authors and Affiliations

  1. Moscow State University, Vorob'evy gory, Moscow, 119899, Russia

    E. V. Stenina, O. A. Baturina, L. N. Sviridova & B. B. Damaskin

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  1. E. V. Stenina
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  2. O. A. Baturina
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  3. L. N. Sviridova
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  4. B. B. Damaskin
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Stenina, E.V., Baturina, O.A., Sviridova, L.N. et al. Coadsorption of Halide Anions and 1-Adamantanol Molecules on a Mercury Electrode. Russian Journal of Electrochemistry 37, 931–938 (2001). https://doi.org/10.1023/A:1011996210341

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  • DOI: https://doi.org/10.1023/A:1011996210341

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