Abstract
Abstract The regularities of the formation and dissolution of independent new-phase nuclei on an indifferent electrode during a cyclic potential sweep were analyzed. Equations for cyclic voltammograms and nuclei sizes were derived for cases of simultaneous or progressive nucleation with diffusion-controlled growth or kinetically (charge transfer) controlled growth. Results of numerical simulation obtained at various values of the scan rate were presented. It was found that current extrema can be proportional to the scan rate raised to the power of –1/2, –3/2, –2, –3, depending on the nucleation type and the limiting growth stage. Criteria for identification of phase formation mechanism were verified by analyzing the experimental cyclic voltammograms for the electrodeposition/electrodissolution of silver nuclei on iridium in the KNO3-NaNO3-AgNO3 melt.
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