Adsorption and desorption of CO on Pt(1�1�1): a comprehensive analysis
Surf. Sci., 545 (1-2):
47 - 69 (2003)DOI: DOI: 10.1016/j.susc.2003.08.040
Abstract
A comprehensive theory of the adsorption of CO on Pt(1�1�1) is developed
to describe equilibrium properties as well as the adsorption and
desorption kinetics. The basis is a multi-site lattice gas model
which allows for adsorption at on-top and bridge sites, and includes
site exclusion and lateral interactions out to second neighbour unit
cells as well as a mean field to account for long ranged dipolar
interactions between CO molecules. The theory reproduces the coverage
and temperature dependence of pressure isotherms, partial coverages,
heat of adsorption, total sticking coefficients, and isothermal and
temperature-programmed desorption rates. The quality of the fits
and the internal consistency of the theory are such that a number
of minor inconsistencies in available experimental data can be identified
and discussed.