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Illumination of aqueous CdS dispersions loaded with Pt and RuO 2 by visible light produces hydrogen and oxygen in stoichiometric proportion. No degradation of the photocatalyst is noted after 60 h of irradiation time. The RuO 2 deposit on the particle surface greatly accelerates the transfer of holes from the semiconductor valence band to the aqueous solution thus inhibiting photocorrosion.
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Kalyanasundaram et al. (1981) studied this question.
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