An XPD and ISS study of the (2 × 2)-(CO + K) coadsorption structure on Co(0001)

Jukka Vaari, J. Lahtinen, T. Vaara, Pekka Hautojärvi

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21 Citations (Scopus)


We have studied the coadsorption of carbon monoxide and potassium on Co(OOOl) using XPS, TDS, LEED, XPD, and ISS. Potassium-induced dissociation of CO was not detected. Two ordered coadsorption structures were observed, namely (2 × 2)-(CO + K) and (2 × 2)-(2CO + K). The XPD results show that the CO molecules are adsorbed perpendicular to the surface. According to the ISS measurements the K atoms form the outermost layer of the coadsorption structure.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalSurface Science
Issue number1-3
Publication statusPublished - 1 Feb 1996
MoE publication typeA1 Journal article-refereed


  • Alkali metals
  • Carbon monoxide
  • Cobalt
  • Low energy ion scattering (LEIS)
  • Low index single crystal surfaces
  • Surface structure
  • Thermal desorption spectroscopy
  • X-ray photoelectron spectroscopy


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