Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)

O 35.52: Poster

Dienstag, 27. März 2012, 18:15–21:45, Poster B

Solar2Fuel: Spectroscopic and electrochemical characterization of functionalized semiconductor surfaces for photocatalytic reduction of CO₂ — •Florian Staier, Michael Grunze, and Michael Zharnikov — Angewandte Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 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, storage of CO₂ or its conversation to fuel or useful chemicals are highly desirable. Along these lines, the Solar2Fuel project, funded by German BMBF (13N11793), aims on photocatalytic conversion of CO₂ to methanol with a sufficient quantum efficiency to make an industrial realization of the process profitable. As the basic catalytic system, semiconductor nanoparticle powder coatings are used. These particles are functionalized with dye molecules to promote the photocatalytic reaction and to move the absorption spectrum from UV to the visible range. Here we present first results on the adsorption kinetics, absorption character, and photoactivity for a variety of the relevant systems. These properties were primary addressed by X-ray photoelectron spectroscopy and electrochemical methods.