Abstract
We present a kinetic Monte Carlo simulation based on ab initio calculations for the thermal desorption of oxygen from a Rh(111) surface. Several models have been used for the parametrization of the interaction between the adsorbed atoms. We find that models based on a parametrization with only pairwise interactions have a relatively large error in the predicted adsorption energies. This error can be significantly reduced by including three- and four-body interactions. In addition, we find that a significant amount of atoms adsorb in a second adsorption site — the hcp-hollow site — at an elevated temperature. Consequently, only a many-body multisite model of the oxygen interactions yields appropriate desorption spectra for the full coverage range, while more simple models only capture the correct shape in the low-coverage case. Our parametrization allows us to predict the adsorption energies of an arbitrary configuration of adsorbates with a mean average error of less than 6 meV/atom.
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Dates
Type | When |
---|---|
Created | 15 years, 3 months ago (May 17, 2010, 6:23 p.m.) |
Deposited | 2 years ago (Aug. 4, 2023, 1:57 a.m.) |
Indexed | 1 month ago (July 30, 2025, 6:55 a.m.) |
Issued | 15 years, 3 months ago (May 17, 2010) |
Published | 15 years, 3 months ago (May 17, 2010) |
Published Online | 15 years, 3 months ago (May 17, 2010) |
Published Print | 15 years, 3 months ago (May 21, 2010) |
@article{Franz_2010, title={Kinetic Monte Carlo simulations of temperature programed desorption of O/Rh(111)}, volume={132}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.3415501}, DOI={10.1063/1.3415501}, number={19}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Franz, T. and Mittendorfer, F.}, year={2010}, month=may }