Dresden 2026 – scientific programme

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O: Fachverband Oberflächenphysik

O 94: Oxides and insulators: Adsorption and reaction of small molecules

O 94.8: Talk

Friday, March 13, 2026, 11:30–11:45, HSZ/0204

Towards Understanding the Photoreactivity of SrTiO3 through Studies in Ultra-High Vacuum — •Anna Lemperle, Philip Petzoldt, Martin Tschurl, and Ueli Heiz — Chair of Physical Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany

Strontium titanate is renowned for its photocatalytic water splitting capabilities. However, the catalytic mechanism remains elusive. A promising approach to obtain insights into structure-reactivity relations is to investigate well-defined single crystal model catalysts under ultra-high vacuum conditions. This contribution discusses first results on the thermal and photoreactivity of water and oxygen on the bare strontium titanate (100) surface. Experiments combining temperature programmed desorption and studies under illumination point to a high importance of the dynamic behaviour of bulk and surface oxygen for the reactivity of strontium titanate (100).

Keywords: Photoreactions; SrTiO3; Water adsorption; Hydrogen evolution; Oxygen vacancies