Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 61: Semiconductor Surfaces: Adsorption and Reactivity

O 61.6: Vortrag

Mittwoch, 3. April 2019, 16:15–16:30, H25

Temperature Influence in the Photocatalysis of Pt-Loaded Titania (110) — •Carla Courtois, Constantin A. Walenta, Sebastian L. Kollmannsberger, Martin Tschurl, and Ueli Heiz — Chair of Physical Chemistry, Department of Chemistry & Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany

We show the influence of temperature for the photocatalytic alcohol conversion on an n-type semiconductor single crystal surface. The focus lies on a comparison between different alcohols as reactants on a Pt-loaded titania catalyst. The photooxidation mechanisms proceed via a direct hole transfer to the adsorbed alcohol molecules. The outcome of the photochemical reactions is strongly governed by the thermal adsorption/desorption properties of the involved molecules. Thus, the overall outcome can be controlled by the judicious choice of the reaction conditions.