Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 78: Poster: Surface Dynamics - Reactions, Elementary Processes and Phase Transitions
O 78.13: Poster
Mittwoch, 14. März 2018, 18:15–20:30, Poster A
Model Catalytic Studies of Liquid Organic Hydrogen Carriers: Dehydrogenation of Indole, Indoline and Octahydroindole on Pt(111) — Philipp Bachmann1, Johann Steinhauer1, Florian Späth1, Fabian Düll1, Udo Bauer1, Marlene Scheuermeyer2, Peter Wasserscheid2, Hans-Peter Steinrück1, and •Christian Papp1 — 1Lehrstuhl für Physikalische Chemie II, FAU Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany — 2Lehrstuhl für Chemische Reaktionstechnik, FAU Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany
Indole derivatives are considered promising Liquid Organic Hydrogen Carriers (LOHC) for renewable energy storage. Using X-ray photoelectron spectroscopy (XPS) and Temperature Programmed Desorption (TPD), we investigated low temperature adsorption, and dehydrogenation during heating of the hydrogen-lean indole, as well as the hydrogen-rich indoline and octahydroindole on Pt(111). For all three molecules, we find deprotonation of the NH bond above 270 K. For the hydrogen-rich carrier molecules indoline and octahydroindole we find that this deprotonation is accompanied by dehydrogenation via an indole intermediate, resulting in an indolide species above 300 K. For octahydroindole, we also find a side reaction yielding small amounts of a π-allyl species between 170 and 450 K. Above 450 K, decomposition of the remaining indolide species takes place.[1]
[1] M. Schwarz, P. Bachmann et al., Chem. Eur. J., 2017, 23, 14806-14818.