Regensburg 2016 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 46: 2D Materials beyond Graphene: TMDCs, Slicene and Relatives

O 46.8: Poster

Dienstag, 8. März 2016, 18:15–20:30, Poster E

Hydrogenation and dehydrogenation of hexagonal - Boron Nitride (h-BN) on Ni(111) — •Florian Späth, Fabian Düll, Christoph Gleichweit, Udo Bauer, Philipp Bachmann, Christian Papp, and Hans-Peter Steinrück — Friedrich-Alexander-Universität, Erlangen-Nürnberg, Germany

Hexagonal-Boron Nitride (h-BN), which is a single atom thick sheet of alternatingly, hexagonal-arranged boron and nitrogen atoms, may be a suitable candidate for future hydrogen storage applications. Here, we investigate its reactivity towards atomic hydrogen, i.e. the hydrogenation, and subsequently the thermally activated dehydrogenation. The system is investigated with high-resolution temperature programmed X-ray photoelectron spectroscopy (HR-XPS) and temperature programmed desorption (TPD). h-BN is prepared via chemical vapor deposition of Borazine (B3N3H6) on a Ni(111) single crystal and subsequently exposed to atomic hydrogen at low temperatures. In HR-XPS, we find distinct chemical shifts after exposure to atomic hydrogen. In the temperature programmed investigation, we observe different dehydrogenation steps occurring at different temperatures, which depend on the initial hydrogen coverage. A comparison to the hydrogenation of graphene on Ni(111) will be shown. We acknowledge the support by the Cluster of Excellence "EAM" and the SFB 953 "Synthetic Carbon Allotropes".