Promoter action of alkali in the activation of CO2 on Pd(111): A HREELS case 
study

Wohlrab, S.; Ehrlich, D.; Wambach, J.; Kuhlenbeck, H.; Freund, Hans-Joachim

doi:10.1016/0039-6028(89)90230-6

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Promoter action of alkali in the activation of CO₂ on Pd(111): A HREELS case study

MPS-Authors

There are no MPG-Authors in the publication available

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

Wohlrab, S., Ehrlich, D., Wambach, J., Kuhlenbeck, H., & Freund, H.-J. (1989). Promoter action of alkali in the activation of CO₂ on Pd(111): A HREELS case study. Surface Science, 220(2-3), 243-252. doi:10.1016/0039-6028(89)90230-6.

Cite as: https://hdl.handle.net/21.11116/0000-000E-54BC-0

Abstract

We study the adsorption and reaction of CO₂ as a function of temperature between 100 and 700 K in the presence of Na on a Pd(111) surface using high resolution electron energy loss spectroscopy. While CO₂ does not react with a clean Pd(111) surface, we find various reaction channels on the Na precovered Pd(111) surface depending on the Na coverage. At intermediate coverage a bent CO₂⁸⁻ species with characteristic vibrational bands can be unambiguously identified. This species is stable up to 200 K, and dissociates into CO and oxygen similar to its behaviour on other surfaces, and as reported in a previous photoemission study [Wambach et al., Surface Sci. 209 (1989) 159]. In case the surface has been oxygen contaminated before Na and CO₂ exposure surface carbonates can be observed.