Berlin 2024 – scientific programme
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O: Fachverband Oberflächenphysik
O 35: Poster: Surface Reactions
O 35.3: Poster
Tuesday, March 19, 2024, 18:00–20:00, Poster C
Model Catalytic Studies on the Thermal Dehydrogenation of Alcohol-Based Liquid Organic Hydrogen Carrier Systems — •Valentin Schwaab1, Felix Hemauer1, Natalie J. Waleska-Wellnhofer1, Eva Marie Freiberger1, Hans-Peter Steinrück1, and Christian Papp2 — 1Friedrich-Alexander-Universität Erlangen-Nürnberg — 2Freie Universität Berlin
The transition to a sustainable, renewable-based energy system requires novel energy storage technologies. Hydrogen production through electrolysis is a promising approach, however, under standard conditions the gas has a low volumetric energy density and is difficult to handle. So-called liquid organic hydrogen carriers (LOHCs) enable safe storage of hydrogen at high volumetric energy densities through the reversible hydrogenation of organic compounds. Alcohols are particularly interesting systems, as they often exhibit exceptionally low dehydrogenation temperatures in their reaction to the respective hydrogen-lean carbonyl compounds.
We investigated the dehydrogenation reactions of two alcohol-based LOHC pairs, namely, benzaldehyde/cyclohexylmethanol and acetophenone/1-cyclohexylethanol, on a Pt(111) model catalyst. The adsorption and the thermal evolution of the compounds was monitored in situ in synchrotron radiation photoelectron spectroscopy (SRPES) experiments at BESSY II, Helmholtz-Zentrum Berlin (HZB).
We acknowledge financial support by the Bavarian Ministry of Economic Affairs, Regional Development and Energy, and by the DFG (419654270). We thank HZB for the allocation of beamtime.
Keywords: Liquid Organic Hydrogen Carriers; Energy Storage; Catalysis; Photoelectron Spectroscopy; Hydrogen Storage