Kinetics of Non-faradaic Processes

Mixed adsorption-diffusion control was considered by Lorenz and Mockel 

If the validity of the Frumkin adsorption isotherm is assumed it follows that 

Equations (II.5.46) and (II.5.47) correspond to an equivalent circuit in which the capacity Chf is in parallel with the adsorption impedance Z. This impedance represents a series of an adsorption resistance (determined by the rate of adsorption) and a Warburg-like complex impedance (corresponding to diffusion of the surfactants) and a pure capacity Clf The electrolyte resistance is already eliminated here. For very high frequencies it follows that and 

Lorenz [22] considered the case that a two-dimensional association occurs in the adsorption layer. Here the surfactant monomers are in equilibrium with surfactant clusters of constant size. He derived the corresponding frequency dependence of cot 6 = o)CpRp. For lower frequencies, a characteristic decrease in 

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