Adsorption and structure dependent desorption of CO on Co(0001)

J. Lahtinen*, Jukka Vaari, Kalle Kauraala

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

130 Citations (Scopus)

Abstract

The adsorption of CO on the Co(0001) surface at room temperature and at 180 K has been studied using work function measurements, X-ray photoelectron spectroscopy, thermal desorption spectroscopy (TDS) and low energy electron diffraction. At low coverages and at room temperature the standard (√3 × √3)R30°-CO structure was observed. By decreasing the temperature and increasing the CO exposure, other stable structures were found on the surface. The (√7/3 × √7/3)R10.9°-CO structure was found in a small coverage range around θ = 0.43 ML and the (√12/7 × √12/7)R10.9° structure with θ = 0.58 at saturation exposures. Each of the structures were attached to a specific desorption regime in the TDS spectrum. The position of the C 1s and O 1s core levels indicate single adsorption site in the two lower coverage structure and two different adsorption sites for the most dense adsorption layer.

Original languageEnglish
Pages (from-to)502-510
Number of pages9
JournalSurface Science
Volume418
Issue number3
DOIs
Publication statusPublished - 14 Dec 1998
MoE publication typeA1 Journal article-refereed

Keywords

  • Carbon monoxide
  • Cobalt
  • Low energy electron diffraction (LEED)
  • Low index single crystal surfaces
  • Surface structure
  • Thermal desorption spectroscopy
  • X-ray photoelectron spectroscopy

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