English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Diffusion of carbon monoxide and oxygen on Pt(110): experiments performed with the PEEM

MPS-Authors
/persons/resource/persons21920

Oertzen,  Alexander von
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22027

Rotermund,  Harm-Hinrich
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons252307

Nettesheim,  Stefan
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)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Oertzen, A. v., Rotermund, H.-H., & Nettesheim, S. (1994). Diffusion of carbon monoxide and oxygen on Pt(110): experiments performed with the PEEM. Surface Science, 311(3), 322-330. doi:10.1016/0039-6028(94)91422-2.


Cite as: https://hdl.handle.net/21.11116/0000-0009-A33D-B
Abstract
Diffusion coefficients are determined by coverage profile analysis of photoemission electron microscope (PEEM) images. The diffusion coefficients for carbon monoxide and oxygen on a Pt(110) single crystal surface were derived in the temperature range of 318 to 438 K for carbon monoxide and 606 to 668 K for oxygen. Carbon monoxide does not show a pronounced dependence of the diffusion coefficient on coverage but a significant dependence on the surface reconstruction. Anisotropy of diffusion is in the range of a factor of 2. In contrast, oxygen shows a very high anisotropy with diffusion occurring practically only parallel to the crystallographic [110] direction and a strong coverage dependence. For an oxygen coverage less than 0.2 monolayer, the diffusion coefficient is higher by one order of magnitude than at high coverage. Activation energies for carbon monoxide diffusion are between 9 and 13 kcal/mol, while oxygen has an activation energy of 30 kcal/mol for low coverage and 40 kcal/mol for high coverage.