Analysis of modern phenomenological approaches toward describing the structure and properties of the electrical double layer dense part on the metal solution interface

In this paper the following issues are discussed: the components of the potential drop at the metal/solution interface and the corresponding components of the differential capacitance; the model interpretation of the metal/solution boundary without and with regard of the metal and solvent separate contributions; the Amokrane-Badiali model and its improvement when taking into account the chemisorptive interaction of solvent molecules with metals; and, finally, the development of views on the Volta's problem solution.