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Catalysis of Interfacial Transfer of Photo-Generated Electrons


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  • Product Description
Four related trimeric molybdenum-sulfur complex ions were examined as electron transfer catalysts in the reduction of water and acetylene by UV sensitized colloidal TiO2 using polyvinyl alcohol and or methanol as sacrificial electron donors. The four ions [Mo3S4(OH2)9]4+, [Mo3FeS4(OH2)10]4+, [Mo3NiS4(OH2)10]4+ and [Mo3S4(CN)9]5- had quantum yields under low light conditions, at 313 nm, of 6.6, 4.7, 2.4 and 7.2% respectively. The pH dependence of the rate of product formation for each was found. Loading and light intensity effects were also studied. Light intensity results were interpreted in terms of a model which incorporates the heterogeneity of the surface hole trapping sites. In the acidic region a catalyst-colloid association for the [Mo3S4(OH2)9]4+ ion and for the [Mo3S4(CN)9]5- ion was demonstrated. The dependence of electron transfer rates on hole scavenger concentration was shown. Platinum catalyst experiments and control experiments without added catalyst were also done. The aquo, cyano and platinum catalysts all appear to be limited by the rate of hole transfer, and their relative effectiveness can not be distinguished.
Product Specifications
SKU :COC10546
AuthorDonald Wycoff
Number of Pages148
Publishing Year11/24/2010
Edition1 st
Book TypeInorganic chemistry
Country of ManufactureIndia
Product BrandLAP LAMBERT Academic Publishing
Product Packaging InfoBox
In The Box1 Piece
Product First Available On ClickOnCare.com2015-07-14 00:00:00