“…The dependence of the capacitance of the carbon phase on the electrode rational potential (E − E σ=0 , where E σ=0 is the zero charge potential), obtained assuming, to a first approximation, that this simplified model developed in [4,5] is valid for C(0001) with the cut surface (prepared according to the method described in [8,9]) as well as for polished edge plane of HOPG and glassy carbon electrodes, is given in figure 1. It should be noted that the Amokrane and Badiali model has been worked out for the homogeneous planar and smooth surfaces with translational invariance parallel to the metal surface [4,5]. Therefore, the values of C m obtained for the cut C(0001) | 0.1 M NaF+H 2 O as well as for C(0001) | 0.2 M (C 3 H 7 )NBF 4 +acetonitrile interface are realistic as the surface roughness of cut HOPC, i.e.…”