Reaction of CO2 on Pd(111) activated via promotor action of alkali coadsorption

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

doi:10.1016/S0042-207X(05)80144-7

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Reaction of CO₂ on Pd(111) activated via promotor action of alkali coadsorption

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Ehrlich, D., Wohlrab, S., Wambach, J., Kuhlenbeck, H., & Freund, H.-J. (1990). Reaction of CO₂ on Pd(111) activated via promotor action of alkali coadsorption. Vacuum, 41(1-3), 157-160. doi:10.1016/S0042-207X(05)80144-7.

Cite as: https://hdl.handle.net/21.11116/0000-000E-715F-9

Abstract

We present CO₂ adsorption studies on a Pd(111) surface as a function of Na precoverage using high resolution electron energy loss spectroscopy. For low Na coverage we find dissociation of CO₂ into CO and O even at 90 K. A t high Na coverage as well as on oxygen contaminated Pd surface, formation of surface carbonates can be observed. A t intermediate Na coverage the reaction proceeds via a bent anionic C0^δ-₂ species which dissociates at higher temperatures into CO and O.