Structure of disordered ethylene adsorbed on Pt(111) analyzed by diffuse LEED: Asymmetrical di-σ bonding favored

R. Döll, C. A. Gerken, M. A. VAN HOVE, G. A. Somorjai

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

The adsorption structure of ethylene on Pt(111) at 200 K is studied by means of diffuse low-energy electron diffraction (DLEED), analyzing diffuse intensity versus energy, DI(E), curves. The data favor a mixed occupation of two similar sites with the centers of the C-C bonds above both fcc and hcp sites and very similar local structures. In each case, the best-fit adsorption geometry is asymmetrical between the two carbon atoms, the molecular axes likely being tilted with respect to the surface plane by about 22°. Substrate relaxation is undetectable.

Original languageEnglish
Pages (from-to)151-161
Number of pages11
JournalSurface Science
Volume374
Issue number1-3
DOIs
Publication statusPublished - 10 Mar 1997

Scopus Subject Areas

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

User-Defined Keywords

  • Alkenes
  • Electron-solid diffraction
  • Low energy electron diffraction (LEED)
  • Low index single crystal surfaces
  • Platinum
  • Surface structure

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