Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 61: Semiconductor Surfaces: Adsorption and Reactivity

O 61.5: Vortrag

Mittwoch, 3. April 2019, 16:00–16:15, H25

Mechanisms in Photocatalytic Hydrogen Evolution — •Martin Tschurl, Constantin A. Walenta, Sebastian L. Kollmannsberger, Carla Courtois, and Ueli Heiz — Chair of Physical Chemistry, Department of Chemistry & Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany

Sustainable energy production and storage is considered one of the major challenges of the future, due to the impact of global warming aggravated by burning fossil fuels. One promising technology to meet this challenge is photocatalysis. It is inspired by the idea to use sunlight for the generation of renewable fuels such as hydrogen. State-of-the-art materials often comprise co-catalyst loaded semiconductors, but these systems are still limited in efficiency. The development of more powerful catalysts may have been hindered by a lack of insights on a molecular scale, as the exact mechanistic details are so far surprisingly little understood. In this talk, detailed mechanisms of the hydrogen evolution on platinum-loaded titania are discussed from a surface science perspective. Different mechanist models to explain hydrogen evolution are discussed and compared with each other.