Monte Carlo simulation of the electrical differential capacitance of a double electrical layer formed at the heterogeneous metal oxide/electrolyte interface

A semiempirical simulation study of differential capacitance cdcd is presented for the case in which the formula for the macroscopic surface potential is known. Both the differential capacity and the surface potential are treated as unique functions of the potential determining ions (H+ ions). The effects of surface heterogeneity on the surface charge density curves σ0=f(pH)σ0=f(pH), and capacity curves cd=f(pH)cd=f(pH), as well as on the position of maximum capacitance are discussed. The “model” effects (influence of the model parameter on the results) are presented.

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