Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 78: Poster: Surface Dynamics - Reactions, Elementary Processes and Phase Transitions

O 78.9: Poster

Mittwoch, 14. März 2018, 18:15–20:30, Poster A

Model catalytic studies of liquid organic hydrogen carriers: Pyridine / piperidine on Ni(111) — •Marie Freiberger, Johann Steinhauer, Philipp Bachmann, Florian Späth, Udo Bauer, Fabian Düll, Hans-Peter Steinrück, and Christian Papp — Lehrstuhl für Physikalische Chemie II, FAU Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany

A strong effort for the implementation of renewable energy sources was made by constructing large-scale wind farms and solar plants, which replace power plants with non-renewable fuels. The availability of these energy sources is unsteady and unpredictable due to environmental influences. Therefore, energy storage becomes more important in the near future. One concept is the use of liquid organic hydrogen carriers (LOHC), which enable hydrogen storage under ambient conditions. In an LOHC system, when excess energy is available, organic molecules are catalytically loaded with hydrogen to form an energy- and hydrogen-rich compound. Afterwards, when energy is needed, hydrogen is catalytically unloaded and the hydrogen lean form is restored. Herein, we present detailed studies on the LOHC system pyridine and its hydrogenated form piperidine. This LOHC system is investigated in a model catalytic approach on a Ni(111) surface under ultra-high vacuum conditions. Using synchrotron radiation-based high-resolution X-ray photoelectron spectroscopy we are able to observe the adsorption, desorption and reaction behaviour of the LOHC system. Furthermore, insights on the structure-reactivity relationship in dehydrogenation catalysis of heterocyclic compounds are provided.