Abstract
We report theoretical results for the bonding of NO to the threefold (fcc) position of the Cu(111) surface. Both, N- and O-down orientations have been considered. Our study is based on several cluster models and ab initio wave functions. We found that the NO/Cu(111) interaction is dominantly ionic in nature, with a small but noticeable π covalent contribution for the N-down orientation only. The ionic nature of the bond has important consequences as an avoided crossing between two electronic states of ionic and neutral character. The existence of this avoided crossing interaction indicates that the adsorption process is nonadiabatic. Finally, the analysis of the vibrational frequencies of adsorbed NO predicts that a O-down species may exist in the NO/Cu(111) system. This is the first time that an O-down species is proposed in Cu surfaces.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 8:14 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 6, 2024, 8:45 a.m.) |
Indexed | 1 month, 2 weeks ago (July 16, 2025, 9:35 a.m.) |
Issued | 29 years, 4 months ago (April 8, 1996) |
Published | 29 years, 4 months ago (April 8, 1996) |
Published Print | 29 years, 4 months ago (April 8, 1996) |
@article{Illas_1996, title={Geometry, vibrational frequencies and bonding mechanism of NO adsorbed on Cu(111)}, volume={104}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.471773}, DOI={10.1063/1.471773}, number={14}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Illas, F. and Ricart, J. M. and Fernández-García, M.}, year={1996}, month=apr, pages={5647–5656} }