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O: Fachverband Oberflächenphysik

O 60: Poster Session IV (Solid/liquid interfaces; Semiconductors; Oxides and insulators; Graphene; Plasmonics and nanooptics; Electronic Structure; Surface chemical reactions; Heterogeneous catalysis)

O 60.117: Poster

Mittwoch, 16. März 2011, 17:30–21:00, P4

Solar2Fuel: XPS and TPD characterization of functionalized TiO₂ surfaces for photocatalytic reduction of CO₂ — •Florian Staier, Michael Grunze, and Michael Zharnikov — Angewandte Physikalische Chemie, Universität Heidelberg, INF 253, 69120 Heidelberg

The handling of CO₂ produced by industrial installations and power plants has become a very important environmental issue nowadays because of it’s generally accepted impact on the green house effect. In this context, a storage of CO₂ or its conversation to fuel or useful chemicals are highly desirable. Along these lines, the solar2fuel project, funded by BMBF, aims on photocatalytic conversion of CO₂ to methanol with a sufficient quantum efficiency which can justify and make rentable an industrial realization of the process. As the primary catalytic system TiO₂ nanoparticle powder coatings are used. These particles are doped with metals to enhance their catalytic activity and functionalized with specially designed dyes which promote photocatalytic reaction and move the absorption spectrum from UV (characteristic of TiO₂) to the visible range. We present first results on characterization of these catalytic systems by several complimentary techniques as well as on temperature-programmed-desorption of CO₂ and methanol from these functionalized surfaces.