A theoretical study of Zn adsorption and desorption on a Pd(111) substrate

H. P. Koch, I. Bako, G. Weirum, M. Kratzer, R. Schennach

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The adsorption and structure of Zn on a Pd(111) surface has been investigated using density functional theory (DFT). It could be shown that Zn prefers adsorption sites with a maximum amount of Pd neighbours on the Pd(111) surface. Zn does form a stable PdZn surface alloy on Pd(111) which shows a (2 × 1) structure. The surface energy of this surface alloy decreases with increasing numbers of PdZn layers. Furthermore the adsorption of Zn on the PdZn surface alloy was investigated. The electronic structure of the Zn layers approaches the bulk Zn state only after a thickness of 4 additional Zn layers. A clear charge transfer between Pd and Zn has been found and the electronic structure of the Zn suggests an anisotropic binding of the Zn, with higher binding energy within a Zn layer and lower binding energy between two Zn layers. This is also reflected in the different desorption energies of different Zn layers found in experiments.

Original languageEnglish
Pages (from-to)926-931
Number of pages6
JournalSurface Science
Volume604
Issue number11-12
DOIs
Publication statusPublished - Jun 15 2010

Keywords

  • Adsorption
  • DFT
  • Desorption
  • Pd(111)
  • PdZn alloy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Fingerprint Dive into the research topics of 'A theoretical study of Zn adsorption and desorption on a Pd(111) substrate'. Together they form a unique fingerprint.

  • Cite this