Regensburg 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 58: Solid-Liquid Interfaces: Reactions and Electrochemistry II
O 58.4: Vortrag
Mittwoch, 19. März 2025, 11:15–11:30, H4
The direct comparison of Pt and Cu particles on a TiO2 photocatalyst in the hydrogen evolution reaction — •Lucia Mengel1, Pieter van den Berg2, Martin Tschurl1, Neill Goosen2, and Ueli Heiz1 — 1Chair of Physical Chemistry, School of Natural Sciences & Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85748 Garching, Germany — 2Department of Process Engineering, Stellenbosch University, Banghoek Rd, Stellenbosch Central, Stellenbosch, 7599, South Africa
Anatase TiO2 loaded with a metal co-catalyst is a well-known photocatalyst for hydrogen evolution. Fundamental studies on this system often employ photoreforming of alcohols as model reaction, utilizing noble metals such as platinum as a co-catalyst. The hole-mediated photooxidation reaction of the alcohol yields hydrogen next to valuable organic compounds such as aldehydes. Recent efforts aim at a replacement of platinum as co-catalyst by the more abundant and less expensive copper. In our work, we focus on the evolution of hydrogen on copper-loaded anatase by performing ethanol photoreforming in the liquid phase in oxygen- and water-free conditions. We study the hydrogen evolution reaction under excitation with UV-light and compare the photoactivity of the system to a common platinum-loaded catalyst and discuss possible scenarios for the interpretation of the reaction behavior.
Keywords: photocatalysis; titania; alcohols; hydrogen evolution; metal loading