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Influence of molecular vibrations on dissociative adsorption

✍ Scribed by Axel Gross; Matthias Scheffler

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
528 KB
Volume
256
Category
Article
ISSN
0009-2614

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✦ Synopsis

The influence of molecular vibrations on dissociative adsorption is studied by six-dimensional quantum dynamical calculations. For the system H2 at Pd (100), which possesses non-activated pathways, it is shown that large vibrational effects exist and that they are not due to a strongly curved reaction path and a late dissociation-hindering minimum barrier, as was previously assumed. Instead, they are caused by the lowering of the H-H vibrational frequency during the dissociation and the multi-dimensionality of the potential energy surface. Still there are quantitative discrepancies between theory and experiment identified.

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