Abstract
It has been shown on the example of semiconductor (CdS, TiO2) and metal complex (solvate complexes (V(III), Eu(III), Zr(IV)) photocatalysts that they can form a single photocatalytic system that is characterized by higher efficiency in the direction of the formation of hydrogen from alcohol-water solutions than the individual substances. Successful functioning of such a “hybrid” photocatalytic system is possible if the principle of energy correspondence is satisfied: the potential of the conduction zone of the semiconductor must be more negative than the redox potential of the Men+/Me(n−1)+ pair. In this case a photogenerated electron of the conduction zone is accepted by a metal ion Men+ and, thus, the electron-hole recombination process is suppressed. The resulting reduced form of the metal Me(n−1)+ in the presence of metallic palladium decomposes the protonated molecules of water with the formation of H2.
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Translated from Teoreticheskaya i Éksperimentalnaya Khimiya, Vol. 25, No. 4, pp. 452–459, July–August, 1989.
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Kryukov, A.I., Kuchmii, S.Y., Korzhak, A.V. et al. “Hybrid” photocatalytic systems for production of molecular hydrogen. Theor Exp Chem 25, 420–426 (1990). https://doi.org/10.1007/BF00530435
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DOI: https://doi.org/10.1007/BF00530435