Berlin 2018 – scientific programme
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O: Fachverband Oberflächenphysik
O 7: Heterogeneous Catalysis: Experiment
O 7.2: Talk
Monday, March 12, 2018, 10:45–11:00, MA 141
Temperature Effects in the Photocatalysis of Co-Catalyst Decorated Titania (110) — •Carla Courtois1, Constantin Walenta1, Sebastian Kollmannsberger1, Martin Tschurl1, Rui Pereira2, Martin Stutzmann2, and Ueli Heiz1 — 1Chair of Physical Chemistry, Department of Chemistry & Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85748 Garching, Germany — 2Walter Schottky Institute and Physics Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany
In this study, we show the influence of temperature for photocatalytic reactions on an n-type semiconductor surface. The reactions are investigated for different temperatures under very well defined conditions (UHV). The photooxidation mechanisms proceed via a direct hole transfer to the adsorbed molecules. It is found that the outcome of the photochemical reactions is strongly governed by the thermal adsorption/desorption properties of the involved molecules and can be controlled by the judicious choice of the reaction conditions.