SKM 2023 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 23: Poster: Surface Reactions
O 23.3: Poster
Montag, 27. März 2023, 18:00–20:00, P2/EG
Model Catalytic Studies on the Thermal Dehydrogenation of 1-Cyclohexylethanol on Pt(111) — •Valentin Schwaab1, Felix Hemauer1, Eva Marie Freiberger1, Natalie J. Waleska1, Hans-Peter Steinrück1, and Christian Papp1,2 — 1Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany — 2Freie Universität Berlin, Germany
The transition to a sustainable, renewable-based energy system requires novel energy storage technologies. So-called liquid organic hydrogen carriers (LOHCs) enable the safe storage of green hydrogen at high volumetric energy densities through the reversible hydrogenation of organic compounds. Particularly interesting systems are secondary alcohols as they often exhibit exceptionally low dehydrogenation temperatures in their reaction to the respective ketone.
Herein, we investigated the thermal dehydrogenation of the LOHC-pair of 1-cyclohexylethanol and acetophenone on a Pt(111) model catalyst. To gain fundamental insight into the reaction behavior and thermal stability limits of the two compounds, temperature-programmed X-ray photoelectron spectroscopy (TP-XPS) experiments were carried out. Based on the obtained C 1s and O 1s data, the dehydrogenation of the alcohol and the formation of potential catalyst poisoning decomposition products are discussed.
We acknowledge financial support by the Bavarian Ministry of Economic Affairs, Regional Development and Energy, and by the DFG (Project No. 419654270). We thank HZB for the allocation of synchrotron radiation beamtime.