Abstract
Potential‐step chronoamperometry method was used to determine the electrode kinetics parameters in the electrode. The current transient, which could be observed under strong illumination, could be described by a Cottrell equation from which the kinetics parameters describing the irreversible electrode reaction of , as , were determined. It was estimated that the standard rate constant , the transfer coefficient, and the formal potential vs. SCE. Similarly, the diffusion coefficient of a hydroxyl ion was determined to be . The results were compared with the charge transfer rate between photogenerated holes and specifically adsorbed hydroxyl ions, which was expressed in terms of with in cm2/mol · s, in mol/cm2 and in mol/cm2. A quantitative agreement between two observations was obtained.
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