English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Infrared spectroscopic investigation of CO adsorbed on Pd aggregates deposited on an alumina model support

MPS-Authors
/persons/resource/persons22253

Wolter,  Kai
Chemical Physics, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22101

Seiferth,  Oliver
Chemical Physics, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21774

Kuhlenbeck,  Helmut
Chemical Physics, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21321

Bäumer,  Marcus
Chemical Physics, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21524

Freund,  Hans-Joachim
Chemical Physics, Fritz Haber Institute, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Wolter, K., Seiferth, O., Kuhlenbeck, H., Bäumer, M., & Freund, H.-J. (1998). Infrared spectroscopic investigation of CO adsorbed on Pd aggregates deposited on an alumina model support. Surface Science, 399(2-3), 190-198. doi:10.1016/S0039-6028(97)00817-0.


Cite as: http://hdl.handle.net/21.11116/0000-0007-5EC8-F
Abstract
We show that CO adsorption on Pd aggregates of varying size and order gives rise to several absorption bands in the range of CO stretching frequencies which we assign to different absorption sites. At low temperature (90 K) and saturation coverage we find the population of terminal as well as bridging sites. The CO molecules are preferentially terminally bound, but these exhibit the lower binding energies in agreement with earlier TDS studies. The CO-molecules on two-fold bridging sites are more tightly bound and the relative intensity of the corresponding absorption band increases with increasing size and order of the Pd aggregates. The observed bands may be assigned according to IR results on Pd(111) single crystals which is the orientation of the aggregate surfaces observed for the present deposits. The bands previously assigned to Pd(100), which gain intensity for the well-ordered aggregates with preferentially (111) oriented surfaces, we reassign to CO molecules bound to edges of the (111) facets.