Structural characterization of a model catalyst: Pt/Al2O3/NiAl(110)

Bertrams, Th.; Winkelmann, F.; Uttich, Th.; Freund, Hans-Joachim; Neddermeyer, H.

doi:10.1016/0039-6028(95)00367-3

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Structural characterization of a model catalyst: Pt/Al₂O₃/NiAl(110)

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引用

Bertrams, T., Winkelmann, F., Uttich, T., Freund, H.-J., & Neddermeyer, H. (1995). Structural characterization of a model catalyst: Pt/Al₂O₃/NiAl(110). Surface Science, 331-333, Part B, 1515-1519. doi:10.1016/0039-6028(95)00367-3.

引用: https://hdl.handle.net/21.11116/0000-000E-44D7-3

要旨

By using STM, LEED and ISS we have studied the condensation of Pt on clean NiAl(110) and on a thin ordered Al₂O₃ film grown on NiAl(110). On Al₂O₃/NiAl(110) and up to a coverage of one monolayer Pt forms highly dispersed two-dimensional islands with an average diameter of 10–30 Å whose density increases with the coverage. For higher Pt coverage the formation of three-dimensional Pt clusters is observed. Annealing of the Pt-covered surface leads to a diffusion of Pt into the oxide film. On clean NiAl(110) and up to one monolayer we found two-dimensional growth of Pt the density of the islands remaining approximately constant.