Abstract
The photocatalytic cleavage of water over Pt-RuO 2/TiO 2 catalysts under near UV illumination is investigated in a semicontinuous flow photoreactor. The effects of operational variables on the intrinsic rate of H 2 production, expressed per unit mass of catalyst per unit "transparency" of the reaction slurry, are investigated. It is shown that the intrinsic rate is a linear function of the intensity of incident illumination, an exponential function of the reaction temperature, and an exponential function of the steady-state pH value of the slurry. An equation describing the intrinsic rate of H 2 production over Pt-RuO 2/TiO 2 slurries is developed and values of the kinetic parameters are defined.
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