Growth, thermal stability and structure of ultrathin Zn-layers on Pd(111)

SURFACE SCIENCE

卷:603

Article

Stadlmayr, Werner¹  Penner, Simon¹  Kloetzer, Bernhard¹  Memmel, Norbert¹ 

[1] Univ Innsbruck, Inst Phys Chem, A-6020 Innsbruck, Austria

关键词: Low-energy ion scattering;    Growth;    Compound formation;    Palladium;    Zinc;    Bimetallic surfaces;    Methanol steam-reforming;   

DOI  :  10.1016/j.susc.2008.11.011

来源: Elsevier

【 摘 要 】

Low-energy ion scattering with monolayer sensitivity was applied to investigate ultrathin films of zinc on Pd(1 1 1). Uptake Curves taken at 150 K indicate the Simultaneous growth of multilayers with negligible interlayer transport. Annealing experiments for two-monolayer films reveal a rapid decrease in the zinc Content on the Surface layer at temperatures above 300 K. forming a metastable state with a Pd:Zn surface ratio of approx. 1: 1 in the temperature region between 400 and 550 K. This state is most easily explained as a slightly buckled p(2 x 1)-PdZn surface alloy, with Zn atoms located approx. 0.25 angstrom above their Pd counterparts. (C) 2008 Elsevier B.V. All rights reserved.

【 授权许可】

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