Titlebook: Homogeneous and Heterogeneous Photocatalysis; Ezio Pelizzetti,Nick Serpone Book 1986 Springer Science+Business Media Dordrecht 1986 Adsorp

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Book 1986 sun‘s abundant and limitless supply of energy to produce chemical fuels (e. g. , hydrogen from water, . •. ). The enthusiasm had no previous parallel in the mid-1970‘s. Unfortunately, despite the several good proposals, the results have proven - in retrospect - somewhat disappointing from an econom

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,Bifunctional Porphyrins: Redox Photochemistry of [Meso (Tritolyl (Pyridyl Ru(III) (NH3) 4 L’)) Porpe .molecular rate is significantly faster than the .- molecular process, suggesting an important steric effect in the transition state for electron transfer..Finally, these results are compared with redox processes for analogous porphyrin quinone systems, and implications for related biological redox mechanisms are discussed.

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Radiolytic Methods of Preparation of Colloidal And Heterogeneous Redox Catalysts and their Applicatng polymeric grids. The catalytic performance of Pt sols and Pt bearing membranes is compared with that of analogous radlolytically prepared Pd, 0s and Ru systems. Some physical characteristics of the Pt catalytic systems are presented.

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Catalysed Decay of Oxidising Radicals in Water,adicals can transfer charge to the catalyst until equilibrium is attained. This can involve storage of several hundred oxidising equivalents on each colloidal particle. With strong oxidising radicals that are also stable in water, the catalyst can cause water oxidation.

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Spectroscopic and Electrochemical Studies of Photochemical Electron Transfer in Linked Donor-Acceptnd is also somewhat solvent dependent. Rationalization of the solvent dependence of k. and of U± is attempted both in terms of the Marcus theory of electron transfer and in terms of the Onsager reaction field theory; the latter appears to be more successful.

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Metallic Catalysts on Semiconductors: Transparency and Electrical Contact Properties,ry of the semiconductors and the catalysts. They can be modified by hydrogenation/dehydrogenation of the interface. Hydrogenation increases the barrier heights and the photovoltages of .-type semiconductor/catalyst contacts, and decreases these in .-type semiconductor/catalyst contacts.