The Photoelectrochemical Kinetics of n‐Type Cadmium Sulfide: I . The Hydroquinone System

The photoelectrochemical kinetics of the oxidation of hydroquinone on n‐type cadmium sulfide have been studied using the ring‐disk electrode, photocurrent transients, and modulated light experiments. The balance between the faradaic reaction and the photocorrosion of the has been investigated. The data are explained by a mechanism involving two surface intermediates. The potential dependence of the rate constants for surface recombination, for the oxidation of hydroquinone, and for the photocorrosion is discussed.