Following the changes in local geometry associated with a surface reaction: the 
dehydrogenation of adsorbed ethylene

Bao, Shining; Hofmann, Philip; Schindler, Karl-Michael; Fritzsche, V.; Bradshaw, Alexander M.; Woodruff, D. P.; Casado, C.; Asensio, M. C.

doi:10.1088/0953-8984/6/6/011

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Following the changes in local geometry associated with a surface reaction: the dehydrogenation of adsorbed ethylene

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Bao, Shining
Fritz Haber Institute, Max Planck Society;

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Hofmann, Philip
Fritz Haber Institute, Max Planck Society;

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Schindler, Karl-Michael
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Fritzsche, V.
Fritz Haber Institute, Max Planck Society;

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Bradshaw, Alexander M.
Fritz Haber Institute, Max Planck Society;

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Citation

Bao, S., Hofmann, P., Schindler, K.-M., Fritzsche, V., Bradshaw, A. M., Woodruff, D. P., et al. (1994). Following the changes in local geometry associated with a surface reaction: the dehydrogenation of adsorbed ethylene. Journal of Physics: Condensed Matter, 6(6), L93-L98. doi:10.1088/0953-8984/6/6/011.

Cite as: https://hdl.handle.net/21.11116/0000-0009-9470-1

Abstract

Using scanned-energy-mode photoelectron diffraction we have determined the local adsorption geometry of the reactant and product molecules in a model heterogeneous reaction on a Ni(111) surface in which ethylene (C₂H₄) is dehydrogenated to acetylene (C₂H₂). Although the C-C axis remains essentially parallel to the surface, a change in adsorption site occurs, indicating that for the case of a concerted reaction mechanism only two distinct pathways are possible. Precise structural information on a model system of this kind has hitherto been unavailable.