Radhakrishnamurthy, P.
(1990)
Electrodiffusion and charge separation.
Bulletin of Electrochemistry, 06 (04).
pp. 465-466.
ISSN 0256-1654
Abstract
It has also been realised quite early that there existed some inconsistencies in Planck’s theory of diffusion potentials, regarding the electroneutrality principle. Many workers have tried, to account for the inconsistencies, based on the charge separation over small intervals of time, distance and the variation of dielectric constant across the junction etc. However, in steady state, these theories adapt themselves, to give Planck’s result.
It is proposed to discuss in this paper this problem from the definition of the ionic current and the Nernst-Planck flux equations. This leads to the conclusion that, with the assumptions made by Planck, one can only arrive at the equilibrium potential or the Nernst reversible potential, and cannot get with the given initial and boundary conditions any charge separation even in the nonsteady state
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