Berlin 2008 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 36: Surfaces and Films: Forces, Structure and Manipulation
O 36.1: Vortrag
Dienstag, 26. Februar 2008, 14:15–14:30, MA 041
Low-Temperature STM Study of the (√3 × √3) 30∘ Reconstructed Ni2P (0001) Surface - Atomic Resolution and Geometric Model — •Georg Hermann Simon1, Thomas König1, Markus Heyde1, Hans-Joachim Freund1, Kumiko Kinoshita2, Yuta Nakagawa2, Shushi Suzuki2, and Kiyotaka Asakura2 — 1Fritz-Haber-Institute of the Max-Planck-Society, Faradayweg 4-6, D-14195 Berlin, Germany — 2Catalysis Research Center, Hokkaido University, Sapporo 001-0021, Japan
New catalysts have to be found to follow the demanding legislation around the world for the reduction of sulfur contents in transportation fuels. A promising candidate is Ni2P [1], which is fairly new to surface science. Despite several wet-chemical studies, simulation, spectroscopic and the first room-temperature STM characterization [2] there are many open questions to this material. In surface studies (0001) oriented single crystals have been analyzed so far. In our ultrahigh vacuum low-temperature STM study we worked on a deeper understanding of the surface termination, its preparation and mircostructure. We present atomically resolved images of a previously unreported (√3 × √3) 30∘ reconstruction of the (0001) surface. We put forward considerations for a geometrical model that is being developed in our cooperation based on the Ni3P1 termination of Ni2P (0001).
[1] X. Wang, P. Clark, S.T. Oyama, J. Catal. 208 (2002) 321.
M.G. Moula, S. Suzuki, W.-J. Chun, S. Otani, S.T. Oyama, K. Asakura, Surf. Interface Anal. 38 (2006) 1611.