Alkyl chain length-dependent surface reaction of dodecahydro-N-alkylcarbazoles on Pt model catalysts

Journal article
(Original article)


Publication Details

Author(s): 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
Journal: Journal of Chemical Physics
Publisher: American Institute of Physics (AIP)
Publication year: 2014
Volume: 140
Journal issue: 20
Pages range: 204711
ISSN: 0021-9606


Abstract


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.



FAU Authors / FAU Editors

Amende, Maximilian
Lehrstuhl für Physikalische Chemie II
Bauer, Udo Dr.
Lehrstuhl für Physikalische Chemie II
Gleichweit, Christoph
Lehrstuhl für Physikalische Chemie II
Höfert, Oliver
Lehrstuhl für Physikalische Chemie II
Koch, Marcus
Lehrstuhl für Chemische Reaktionstechnik
Libuda, Jörg Prof. Dr.
Professur für Physikalische Chemie
Müller, Michael
Lehrstuhl für Chemische Reaktionstechnik
Papp, Christian PD Dr.
Lehrstuhl für Physikalische Chemie II
Schernich, Stefan
Professur für Physikalische Chemie
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II
Wasserscheid, Peter Prof. Dr.
Lehrstuhl für Chemische Reaktionstechnik
Zhao, Wei
Lehrstuhl für Physikalische Chemie II


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

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.

BibTeX: 

Last updated on 2019-06-04 at 21:50