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H2 catalysis through superhydrogenation of interstellar polycyclic aromatic hydrocarbons

Published online by Cambridge University Press:  12 October 2020

Frederik Doktor S. Simonsen Open the ORCID record for Frederik Doktor S. Simonsen [Opens in a new window] ,
Pernille A. Jensen ,
Anders W. Skov ,
Rijutha Jaganathan ,
John D. Thrower Open the ORCID record for John D. Thrower [Opens in a new window]  and
Liv Hornekær
Frederik Doktor S. Simonsen
Affiliation:
Department of Physics & Astronomy, Aarhus University, 8000 Aarhus C, Denmark email: Frederik_doktor@phys.au.dk
Pernille A. Jensen
Affiliation:
Department of Physics & Astronomy, Aarhus University, 8000 Aarhus C, Denmark email: Frederik_doktor@phys.au.dk
Anders W. Skov
Affiliation:
Department of Physics & Astronomy, Aarhus University, 8000 Aarhus C, Denmark email: Frederik_doktor@phys.au.dk
Rijutha Jaganathan
Affiliation:
Department of Physics & Astronomy, Aarhus University, 8000 Aarhus C, Denmark email: Frederik_doktor@phys.au.dk
John D. Thrower
Affiliation:
Department of Physics & Astronomy, Aarhus University, 8000 Aarhus C, Denmark email: Frederik_doktor@phys.au.dk
Liv Hornekær
Affiliation:
Department of Physics & Astronomy, Aarhus University, 8000 Aarhus C, Denmark email: Frederik_doktor@phys.au.dk Interdisciplinary Nanoscience Center (iNANO), Aarhus University, 8000 Aarhus C, Denmark email: liv@phys.au.dk
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Abstract

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Experimental data showing superhydrogenation of neutral polycyclic aromatic hydrocarbons (PAHs) coronene, pentacene and pentacenequinone is presented. PAH monolayers were prepared on a highly oriented pyrolytic graphite surface and subsequently exposed to a beam of atomic hydrogen. The superhydrogenated PAH species were examined via temperature programmed desorption measurements. Stable intermediate superhydrogenation degrees as well as fully superhydrogenated species are observed and the initial reaction cross section for coronene has been determined.

Keywords

AstrochemistrylaboratoryISMmoleculesclouds

References

Habart, E. Boulanger, F., Verstraete, L., des Forêts, G. P., Falgarone, E., Abergel, A., et al. 2003, A&A, 397, 623Google Scholar
Jensen, P. A., Leccese, M. Simonsen, F. D. S., Skov, A. W., Bonfanti, M., Thrower, J. D., Martinazzo, R., & Hornekær, L. 2019, MNRAS, 486, 5492CrossRefGoogle Scholar