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Morphological changes at the Hg/solution interface related to the presence of adsorbed cations combined with solvent properties

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Abstract

Morphological changes are detected at the interface of the negatively polarized Hg electrode in contact with aqueous and nonaqueous solutions of single electrolytes. Those changes are indicated by the increase of the topological dimension of the interface above the value of 2.00, as found by combining capacitance measurements with the size scaling method of the hanging mercury drop electrode and also from impedance spectroscopy measurements. Both methods confirm that in highly structured solvents, the adsorption of a wide size range of univalent cations, viz tetrabutylammonium, caesium, and potassium ones, gives rise to structural changes which are identified with the deviation of the interface from its uniform structure. In weakly structured solvents, those effects are still detected, but they are markedly diminished.

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Authors and Affiliations

  1. Laboratory of Physical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece

    A. D. Papoutsis, A. G. Anastopoulos, A. Papaderakis & M. Paschalidou

Authors
  1. A. D. Papoutsis
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  2. A. G. Anastopoulos
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  3. A. Papaderakis
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  4. M. Paschalidou
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Corresponding author

Correspondence to A. G. Anastopoulos.

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For the special issue dedicated to the 70th birthday of Alexander Milchev

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Papoutsis, A.D., Anastopoulos, A.G., Papaderakis, A. et al. Morphological changes at the Hg/solution interface related to the presence of adsorbed cations combined with solvent properties. J Solid State Electrochem 17, 547–553 (2013). https://doi.org/10.1007/s10008-012-1914-1

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  • DOI: https://doi.org/10.1007/s10008-012-1914-1

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