Steering and ro-vibrational effects in the dissociative adsorption and associative desorption of H_2/Pd(100)

Details Steering and ro-vibrational effects in the dissociative adsorption and associative desorption of H_2/Pd(100) Steering and ro-vibrational effects in the dissociative adsorption and associative desorption of H_2/Pd(100)

1997-02-04

arxiv.org/abs/cond-mat/9702037v1

Physics

Condensed Matter

8 pages, 5 figures, subm. to the Proceedings of ISSP-18, June 1996, Poland, to appear in Prog. Surf. Sci

Scientific paper

The interaction of hydrogen with many transition metal surfaces is characterized by a coexistence of activated with non-activated paths to adsorption with a broad distribution of barrier heights. By performing six-dimensional quantum dynamical calculations using a potential energy surface derived from ab initio calculations for the system H_2/Pd(100) we show that these features of the potential energy surface lead to strong steering effects in the dissociative adsorption and associative desorption dynamics. In particular, we focus on the coupling of the translational, rotational and vibrational degrees of freedom of the hydrogen molecule in the reaction dynamics.

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