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  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, 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.

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Wohlrab, S., Author
Ehrlich, D., Author
Wambach, J., Author
Kuhlenbeck, H., Author
Freund, Hans-Joachim1, Author                 
Affiliations:
1Ruhr-Universität Bochum, Lehrstuhl für Physikalische Chemie 1, ou_persistent22              

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 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.

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Language(s): eng - English
 Dates: 1989-03-281989-05-111989-10-02
 Publication Status: Issued
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/0039-6028(89)90230-6
 Degree: -

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Title: Surface Science
  Abbreviation : Surf. Sci.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: 10 Volume / Issue: 220 (2-3) Sequence Number: - Start / End Page: 243 - 252 Identifier: ISSN: 0039-6028
CoNE: https://pure.mpg.de/cone/journals/resource/0039-6028