Formation of electric triple layers by interdiffusion of two electrolytes

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Abstract
The interdiffusion of two electrolytes has been investigated by digital computer simulations. Concentration profiles and electric field strength profiles which are invariant under a Boltzmann-transformation seem to be asymptotically stable. The diffusion potential against time curves are well fitted by a single exponential or a sum of two exponentials with relaxation times around 1/2h when the initial conditions correspond to an error-function zone of length 1 cm. A field reversal effect corresponding to an electric triple layer was observed for CaCl2 at high concentration against HCl at low concentration. Associated with the field reversal is a hump in the H+-profile with maximum in the point of zero field strength.

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