Berlin 2024 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 50: Supported Nanoclusters: Structure, Reaction, Catalysis

O 50.8: Vortrag

Mittwoch, 20. März 2024, 12:15–12:30, TC 006

Photocatalytic Reforming of Tertiary Alcohols at Ambient Conditions — •Paula Neumann, Clara Aletsee, Martin Tschurl, and Ueli Heiz — Chair of Physical Chemistry, School of Natural Sciences & Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85748 Garching, Germany

The selective oxidation of tertiary alcohols by heterogeneous photocatalysis is a mild alternative compared to harsh methods commonly employed in organic chemistry. What was first shown in a UHV study using a titania single crystal as a photocatalyst, we transferred to ambient conditions by means of our gas phase micro-reactor enabling sensitive and time-resolved product detection in a well-defined environment under the exclusion of oxygen. The results observed for a titania powder catalyst are in good agreement with UHV findings suggesting the absence of a significant pressure gap wich allows for a comprehensive interpretation of the surface photochemistry. Lastly, we discuss the impact of co-catalyst loading on the reaction and present the underlying mechanistic processes.

Keywords: photocatalysis; titania; alcohols; micro-reactor