THE ANALYSIS OF RESISTANCE CHANGE IN-DIFFUSION CONTROLLED ELECTRODE PROCESSES

The resistance changes in diffusion limited electrode processes are gi ven and compared with experimentally determined by high frequency resi stometry (HFR) combined with potentiostatic, galvanostatic and cyclic voltammetry methods. The general shape of resistance-time dependence i s similar to current time transients in potentiostatic and potential t ime transients in galvanostatic experiments. The resistance-potential dependence in cyclic resistometry exhibits a sigmoidal shape, similar to the convolutive CV current function. The greatest change of the ele ctrolyte resistance takes place near the electrode surface. High frequ ency resistometry provides independent parameters to those obtained fr om other electrochemical methods.