The structure of the electrical double layer at the faces of bismuth, antimony, or cadmium single crystals in surface-inactive electrolytes

Previously published experimental data on the capacitance of the electrical double layer at the faces of bismuth, antimony, or cadmium single crystals in solutions of surface-inactive electrolytes in water, acetonitrile, methanol, and ethanol are analyzed in terms of various models. Potential drops in the near-surface metal layer and contributions, CM, of the capacitance of the metallic phase for the individual faces of Sb, Cd, or Bi single crystals are determined. It is established that the CM values, as determined in terms of both the Leiva-Schmickler-Henderson model and the Amokrane-Badiali model, depend on the solvent nature. It is found that the two models can be applied to describing the regularities that control the structure of the electrical double layer at the faces of Sb, Cd, or Bi single crystals only to the first, rather rough approximation.