CO adsorption on Pd(110)

CO sticking, adsorption and desorption on Pd(110) has been studied using a molecular beam reactor and real time temperature-programmed X-ray photoelectron spectroscopy (TPXPS). The initial sticking and total uptake decrease with increasing temperature. The C 1s and O 1s binding energies were followed during adsorption, and shifted to higher energy with increasing exposure. TPXPS reveals a decrease in C 1s and O 1s signal intensity at similar to 340 K which coincides with the alpha(3) CO desorption, associated with substrate reconstruction. Binding energy shifts in the C 1s region do not appear to be correlated with this reconstruction, and are thus only dependent upon coverage. (C) 1998 Elsevier Science B.V. All rights reserved.