Gleichweit C, Amende M, Bauer U, Schernich S, Höfert O, Lorenz MPA, Zhao W, Müller M, Koch M, Bachmann P, Wasserscheid P, Libuda J, Steinrück HP, Papp C (2014)
Publication Type: Journal article, Original article
Publication year: 2014
Original Authors: Gleichweit C., Amende M., Bauer U., Schernich S., Höfert O., Lorenz M.P.A., Zhao W., Müller M., Koch M., Bachmann P., Wasserscheid P., Libuda J., Steinrück H.-P., Papp C.
Publisher: American Institute of Physics (AIP)
Book Volume: 140
Pages Range: 204711
Article Number: 204711
Journal Issue: 20
DOI: 10.1063/1.4875921
The concept of liquid organic hydrogen carriers (LOHC) holds the potential for large scale chemical storage of hydrogen at ambient conditions. Herein, we compare the dehydrogenation and decomposition of three alkylated carbazole-based LOHCs, dodecahydro-N-ethylcarbazole (H-NEC), dodecahydro-N- propylcarbazole (H-NPC), and dodecahydro-N-butylcarbazole (H -NBC), on Pt(111) and on AlO-supported Pt nanoparticles. We follow the thermal evolution of these systems quantitatively by in situ high-resolution X-ray photoelectron spectroscopy. We show that on Pt(111) the relevant reaction steps are not affected by the different alkyl substituents: for all LOHCs, stepwise dehydrogenation to NEC, NPC, and NBC is followed by cleavage of the C-N bond of the alkyl chain starting at 380-390 K. On Pt/AlO, we discern dealkylation on defect sites already at 350 K, and on ordered, (111)-like facets at 390 K. The dealkylation process at the defects is most pronounced for NEC and least pronounced for NBC. © 2014 AIP Publishing LLC.
APA:
Gleichweit, C., Amende, M., Bauer, U., Schernich, S., Höfert, O., Lorenz, M.P.A.,... Papp, C. (2014). Alkyl chain length-dependent surface reaction of dodecahydro-N-alkylcarbazoles on Pt model catalysts. Journal of Chemical Physics, 140(20), 204711. https://dx.doi.org/10.1063/1.4875921
MLA:
Gleichweit, Christoph, et al. "Alkyl chain length-dependent surface reaction of dodecahydro-N-alkylcarbazoles on Pt model catalysts." Journal of Chemical Physics 140.20 (2014): 204711.
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