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O: Fachverband Oberflächenphysik

O 16: Nanoscale Heterogeneous Catalysis

O 16.1: Vortrag

Montag, 16. März 2020, 15:00–15:15, TRE Ma

Nickel and Platinum Clusters in Methanol Photocatalysis on Rutile Titania — •Moritz Eder, Carla Courtois, Martin Tschurl, and Ueli Heiz — Chair of Physical Chemistry, Department of Chemistry & Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85748 Garching, Germany

We investigate the role of metal clusters in the photocatalytic alcohol conversion on an n-type semiconductor single crystal surface. It is known that small platinum clusters enable the desorption of molecular hydrogen from the surface, preventing catalyst deactivation and making alcohol photoconversion truly catalytic. This work focuses on the role of nickel clusters in methanol chemistry on reduced a titania(110)surface. Strong parallels to the thermal reactivity of platinum are evident, and the photochemistry is still governed by the semiconductor. However, catalyst deactivation is observed. Its likely causes are discussed with respect to certain pre-treatments.