QUASI-EQUILIBRIUM THIN-LAYER COULOVOLTMETRY OF COMPLEX ELECTROCHEMICAL REACTIONS - A REACTION INVOLVING A MEDIATOR

The method of quasi-equilibrium thin-layer coulovoltmetry is applied f or investigation of redox reactions proceeding via a mediator. The exp ressions for chemical capacity of the system, initial relaxation curre nt, and relaxation function of current upon application to the electro de of a series of equal low-amplitude potential steps are obtained. Th e relative effect of the rates of chemical and electrochemical stages of the reaction on the dependence of the characteristic relaxation tim e of the system on the potential change and on the total time of the p rocess is analyzed.