Weakly Supported Cyclic Voltammetry and Chronoamperometry

Following the numerical procedure discussed in the above section, the electrochemical response of a one-electron reduction process in resistive media will be simulated and studied at macro- and microelectrodes.  

In order to imderstand the deviations with respect to conventional experiments caused by low levels of supporting electroljde we have to bear in mind that these are the result of the effects of the electric field in solution 

Note that within the context of weakly supported media the results obtained for the electroreduction of A are equivalent (except for the sign of the ciurent) to the electrooxidation of A .  

Between the extremes of linear diffusion at macroelectrodes and steady-state voltammetry, intermediate situations can be found where the overall effect on the electrochemical response is the balance of ohmic drop and migration effects. As shown above, in cyclic voltammetry the former increases the peak-to-peak separation and decreases the magnitude of the peaks whereas electromigration can result in the increase or decrease in the current depending on the charge of the electroactive species. 

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