Adsorption sites of CO on Pt (111)

  title={Adsorption sites of CO on Pt (111)},
  author={H. Froitzheim and Hans Hopster and Harald Ibach and Sybille Lehwald},
  journal={Applied physics},
The surface vibrations of CO adsorbed on Pt(111) single crystal surfaces at 320 K have been studied by electron-energy-loss spectroscopy. At low coverages two vibration modes at 58 and ∼260 meV are observed. For exposures >0.2 Langmuir two additional modes at 45 and 232 meV develop. Considering also the observed LEED structures these vibrations are attributed to CO molecules being adsorbed upright in on-top and bridge sites, respectively.