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Journal Article

Structural analyses of the pure and cesiated Ru(0001)–(2×2)-3O phase

MPS-Authors
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Kim,  Young Dok
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Wendt,  Stefan
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Schwegmann,  Stefan
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Over,  Herbert
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Ertl,  Gerhard
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Kim, Y. D., Wendt, S., Schwegmann, S., Over, H., & Ertl, G. (1998). Structural analyses of the pure and cesiated Ru(0001)–(2×2)-3O phase. Surface Science, 418(1), 267-272. doi:10.1016/S0039-6028(98)00722-5.


Cite as: https://hdl.handle.net/21.11116/0000-0006-DAE8-F
Abstract
The structures of the (2×2)-3O and the (2×2)-3O-Cs overlayers on the Ru(0001) surface were analyzed by LEED. The Ru(0001)–(2×2)-3O phase is characterized by a (2×2) vacancy network in which CO molecules are not able to adsorb whereas Cs atoms are. The averaged topmost Ru layer distance (2.21 Å) is slightly expanded with respect to the bulk value, which is consistent with the observed trend that the topmost Ru layer distance increases with O-coverage. Coadsorbing Cs atoms reside in the vacancies exposed by the (2×2)-3O overlayer, whereby the local structural parameters remain essentially unaltered.