# On the translationally activated dissociative chemisorption of hydrogen and deuterium at a nickel (111) surface

- Authors
- Journal
- Chemical Physics Letters 0009-2614
- Publisher
- Elsevier
- Publication Date
- Volume
- 146
- Identifiers
- DOI: 10.1016/0009-2614(88)87434-7

## Abstract

Abstract A statistical model has been developed which accurately describes the dependence of the sticking probability at normal incidence ( S n) on translational energy ( E t) for H 2 and D 2 on a Ni(111) surface according to the equation S n = CE t −1 ( E t- E 0) 2, where E 0 (the threshold energy) and C are constants which are equal to 0.85 kJ mol −1 and 0.02 mol kJ −1, respectively. This result is consistent with a “freely” rotating transition state complex. For a surface temperature T s of 1143 K the model yields an angularly independent mean energy of desorption of 3.09 kT s, which is in reasonable agreement with the experimental result of 2.9 kT s.

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