UPS Studies of Virgin CO on W(100)

Published

January 1, 1976

Author(s)

D Sandstrom, B Waclawski

Abstract

The adsorption of CO on W(100) at 80 K has been studied by photoelectron spectroscopy at hv=21.22 eV, and the results have been correlated with previous data for room temperature adsorption. Initial adsorption produces a peak in the emission spectrum at -7.6 eV (relative to the Fermi energy), which is characteristic of the virgin state of adsorbed CO, as well as additional structures which have been previously shown to be characteristic of α- and β-CO. Upon heating the sample to 260 K the -7.6-eV level is depleted and apparent conversion to the β state occurs as indicated by an enhancement of the emission near -5.5 eV. Additional data taken with hv=16.85, 26.9, and 40.81 eV are in general agreement with the measurements at 21.22 eV; however, the peak at -7.6 eV for hv=21.22 eV is shifted to lower kinetic energies by several tenths of an electron volt at the other photon energies.

Citation

Journal of Vacuum Science and Technology

Volume

13

Issue

1

Pub Type

Journals

Citation

Sandstrom, D. and Waclawski, B. (1976), UPS Studies of Virgin CO on W(100), Journal of Vacuum Science and Technology (Accessed October 31, 2024)