Abstract

This report compares experimental data for the overpotential dependence of the stationary nucleation rate I st and of the induction time t o obtained in two different ways: (i) by varying the potential E n of the working electrode at a constant concentration of metal ions (standard pulse potentiostatic technique), and (ii) by varying the concentration of metal ions at a constant electrode potential E n (modified pulse potentiostatic technique). It is shown that the latter experimental method allows us to fix the surface state of the working electrode and to create well-defined conditions for nucleus formation. Information is obtained on the rate-determining step of the nucleation process.

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