Abstract

The anodic oxidation of various organic substances on a rotating smooth platinum electrode has been studied using potentiostatic and galvanostatic methods. The characteristic shape of the potentiostatic polarization curves and the kinetic inhibition of the oxidation processes have been shown to result from the change in the electrode surface state due to oxygen adsorption. At moderate concentrations, the reaction order with respect to the oxidant is usually fractional, while at high bulk concentrations, the rate becomes independent of the concentration. A hypothesis has been advanced that at all potentials it is the molecules adsorbed on the inhomogenous platinum electrode surface which are oxidized. The kinetic equations and the mechanism of the process of electrochemical oxidation have been considered.

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