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  Potassium-promoted iron oxide model catalyst films for the dehydrogenation of ethylbenzene: An example for complex model systems

Ketteler, G., Ranke, W., & Schlögl, R. (2002). Potassium-promoted iron oxide model catalyst films for the dehydrogenation of ethylbenzene: An example for complex model systems. Journal of Catalysis, 212(1), 104-111. doi:10.1006/jcat.2002.3785.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-131C-3 Version Permalink: https://hdl.handle.net/21.11116/0000-0006-A014-E
Genre: Journal Article

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FHIAC_KRS02_KFeOx_complex_system_final.pdf (Any fulltext), 2MB
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 Creators:
Ketteler, Guido1, Author           
Ranke, Wolfgang1, Author           
Schlögl, Robert1, Author           
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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Free keywords: 18: Iron oxide model catalysts: preparation & characterization
 Abstract: Details of the surface structure and composition of potassium promoted iron oxide model catalyst films prepared on Ru(0001) are investigated by scanning tunneling microscopy (STM), low-energy electron diffraction (LEED) and Auger electron spectroscopy (AES). At 700K, polycrystal-line KFeO2 films are
formed. Upon annealing at the temperature of the technical dehydrogenation reaction (870K), the potassium content in KFeO2 films decreases and a mixed phase which consists of polycrystalline KFeO2 on top of partially uncovered KxFe22O34(0001) forms. Both phases are exposed at the surface. At 970K, the whole film transforms to KxFe22O34(0001). Similarities with technical catalyst samples suggest that the pressure gap is bridged and for the first time, atomic details of the potentially
catalytically active surface phase are presented.

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Language(s): eng - English
 Dates: 2002-11-15
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 3321
DOI: 10.1006/jcat.2002.3785
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Title: Journal of Catalysis
  Alternative Title : J. Catal.
Source Genre: Journal
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Pages: - Volume / Issue: 212 (1) Sequence Number: - Start / End Page: 104 - 111 Identifier: -