Wolf, Martin; Hasselbrink, Eckart; White, J. M.; Ertl, G.:
The Adsorbate State Specific Photochemistry of Dioxygen on Palladium(111).
1990
In: Journal of Chemical Physics (J.Chem.Phys.), Jg. 93 (1990), Heft 7, S. 5327 - 5336
Artikel/Aufsatz in Zeitschrift1990Chemie
Titel:
The Adsorbate State Specific Photochemistry of Dioxygen on Palladium(111).
Autor(in):
Wolf, Martin; Hasselbrink, EckartLSF; White, J. M.; Ertl, G.
Erscheinungsjahr
1990
Erschienen in:
Titel:
Journal of Chemical Physics (J.Chem.Phys.)
in:
Jg. 93 (1990), Heft 7, S. 5327 - 5336
ISSN:

Abstract:

The UV photochem. of mol. adsorbed O on Pd(111) was studied using pulsed laser light with 6.4 eV photo energy. Three processes occur upon irradn.: desorption of O, conversion between adsorption states, and dissocn. to form adsorbed at. O. By using time-of-flight spectroscopy to detect the desorbing mol. O and post-irradn. thermal desorption spectroscopy (TDS) to characterize the adsorbate state, a detailed picture of the photochem. processes is obtained. The O mol. desorb with low translational energies from the satd. surface. The conversion of adsorbed mol. between binding states is induced by the photoinduced build-up of at. O on the surface. Anal. of a proposed reaction model reproduces the obsd. data and yields detailed rates. Polarization anal. indicates that the photochem. processes are initiated by electronic excitations of the substrate.