SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 29: Supported Nanoclusters: Structure, Reactions and Catalysis

O 29.8: Vortrag

Dienstag, 28. März 2023, 12:15–12:30, CHE 91

Reaction Pathways in Heterogeneous Photoreforming of Tertiary Alcohols — •Martin Tschurl, Clara Aletsee, Paula Neumann, Philip Petzoldt, Carla Courtois, Moritz Eder, and Ueli Heiz — Chair of Physical Chemistry, School of Natural Sciences & Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85748 Garching, Germany

While the oxidation of tertiary alcohols remains a challenge in organic chemistry, heterogeneous photocatalysis opens up new pathways for their conversion. In this contribution, we discuss the selective oxidation of those alcohols under illumination on titania model photocatalysts. We reveal the processes occurring on the surface of a rutile single crystal in studies under ultra-high vacuum conditions and address the role of the pressure gap by comparing those results with reactions of titania powders at ambient pressure. Furthermore, we demonstrate the impact of co-catalyst loading on the selectivity of the reaction and explain the underlying reaction mechanisms.