Abstract
The dissociative chemisorption of H2 on Cu(100) has been studied using a six-dimensional wave packet method. All molecular degrees of freedom are treated quantum mechanically, with no dynamical approximations. The potential-energy surface used is an analytical fit to calculations employing density functional theory (DFT), using the generalized gradient approximation (GGA) and a slab representation of the metal surface. The dependence of the reaction probability on normal incidence energy has been obtained for both (v=0, j=0) and (v=1, j=0) H2. Comparison to experiment suggests that, on average, the DFT method overestimates the barriers to dissociation by ∼0.15 eV for H2+Cu(100). In broad agreement with experiments on H2+Cu(111) and H2+Cu(110) the calculations show large vibrational inelasticity. A prediction of the survival probability of (v=1, j=0) H2 as a function of incidence energy is also presented. The measurement of this quantity is now feasible and should provide another sensitive test of the DFT potential-energy surface.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 8:25 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 5, 2024, 7:40 p.m.) |
Indexed | 4 weeks, 1 day ago (Aug. 5, 2025, 8:56 a.m.) |
Issued | 28 years ago (Aug. 22, 1997) |
Published | 28 years ago (Aug. 22, 1997) |
Published Print | 28 years ago (Aug. 22, 1997) |
@article{Kroes_1997, title={Six-dimensional quantum dynamics of dissociative chemisorption of H2 on Cu(100)}, volume={107}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.474682}, DOI={10.1063/1.474682}, number={8}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Kroes, G. J. and Baerends, E. J. and Mowrey, R. C.}, year={1997}, month=aug, pages={3309–3323} }