Neglect of double-layer charging chronopotentiometry

In this case, an analytical expression can also be derived for the concentration profile, e.g. for O 

Typical concentration profiles at various instants during a constant current electrolysis are shown in Fig. 5. Note that [0co(x, t)/dt]x=0 is the same for all curves and that eqns. (23) are identical to the results of a diffusion layer approach , see eqn. (11), with at = (7rZ)0/4f)1/2  

we consider a net reduction, i.e.j 0, and notice that, according to eqn. (23a), there will be a transition time, r, where cQ (0, t) becomes zero. 

As the experiment requires that — j is constant and positive, it follows from eqn. (18) that, at the moment t = r, the value of kt approaches infinity. 

The substitution of eqns. (23) into eqn. (18) leads to an implicit relation between the potential E and the time. It can conveniently be expressed as follows. 

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