CO ADSORPTION ON PD(110)

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