English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

The adsorbate state specific photochemistry of dioxygen on Pd(111)

MPS-Authors
/persons/resource/persons22250

Wolf,  Martin
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons252305

Hasselbrink,  Eckart
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21498

Ertl,  Gerhard
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)

1.459652.pdf
(Publisher version), 2MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Wolf, M., Hasselbrink, E., White, J., & Ertl, G. (1990). The adsorbate state specific photochemistry of dioxygen on Pd(111). The Journal of Chemical Physics, 93(7), 5327-5336. doi:/10.1063/1.459652.


Cite as: https://hdl.handle.net/21.11116/0000-0008-8124-D
Abstract
The ultraviolet‐photochemistry of molecularly adsorbed oxygen on Pd(111) has been studied using pulsed laser light with 6.4 eV photon energy. Three processes occur upon irradiation: desorption of molecular oxygen, conversion between adsorption states, and dissociation to form adsorbed atomic oxygen. By using time‐of‐flight spectroscopy to detect the desorbing molecular oxygen and post‐irradiation thermal desorption spectroscopy (TDS) to characterize the adsorbate state, a detailed picture of the photochemical processes is obtained. The data indicate that the O2 molecules desorbing with low translational energies from the saturated surface as well as the conversion of adsorbed molecules between binding states are induced by the photoinduced build‐up of atomic oxygen on the surface. Analysis of a proposed reaction model reproduces the observed data and yields detailed rates. Polarization analysis indicates that the photochemical processes are initiated by electronic excitations of the substrate.