Parts | Days | Selection | Search | Updates | Downloads | Help
O: Fachverband Oberflächenphysik
O 50: Supported Nanoclusters: Structure, Reaction, Catalysis
O 50.3: Talk
Wednesday, March 20, 2024, 11:00–11:15, TC 006
Influence of the Strong Metal-Support Interaction on the Photoactivity of Pt-loaded TiO2(110) — •Lucia Mengel, Philip Petzoldt, Martin Tschurl, and Ueli Heiz — Chair of Physical Chemistry, School of Natural Sciences & Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85748 Garching, Germany
Pt-loaded TiO2(110) is well-known for its capability of alcohol photoreforming. The hole-mediated photooxidation reaction yields hydrogen next to valuable organic compounds such as formaldehyde. The concept of encapsulation of clusters or nanoparticles by a metal oxide overlayer under reductive conditions is well established and has been extensively studied using a variety of techniques. Such encapsulations caused by the strong metal-support interaction (SMSI) are a promising tool in photo-/electrocatalysis to improve catalyst selectivity and high-temperature stability. However, the mechanistic influence of an SMSI overlayer on the photocatalytic hydrogen evolution reaction on Pt-loaded TiO2(110) is still under investigation.
In our work, we focus on SMSI-induced effects on the hydrogen evolution reaction on Pt10-loaded TiO2(110) under ultra-high vacuum conditions. In particular, we investigate the SMSI state of the Pt10 clusters by thermal-programmed desorption of probe molecules. We employ methanol photoreforming as model reaction to study the evolution of hydrogen on the Pt10 clusters in the SMSI state.
Keywords: photocatalysis; titania; platinum clusters; methanol