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Reaction dynamics of initial O2 sticking on Pd(100).

Authors
  • den Dunnen, Angela
  • Wiegman, Sandra
  • Jacobse, Leon
  • Juurlink, Ludo B F
Type
Published Article
Journal
The Journal of Chemical Physics
Publisher
American Institute of Physics
Publication Date
Jun 07, 2015
Volume
142
Issue
21
Pages
214708–214708
Identifiers
DOI: 10.1063/1.4921571
PMID: 26049517
Source
Medline
License
Unknown

Abstract

We have determined the initial sticking probability of O2 on Pd(100) using the King and Wells method for various kinetic energies, surface temperatures, and incident angles. The data suggest two different mechanisms to sticking and dissociation. Dissociation proceeds mostly through a direct process with indirect dissociation contributing only at low kinetic energies. We suggest a dynamical precursor state to account for the indirect dissociation channel, while steering causes the high absolute reactivity. A comparison of our results to those previously obtained for Pd(111) and Pd(110) highlights how similar results for different surfaces are interpreted to suggest widely varying dynamics.

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