English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

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

MPS-Authors
/persons/resource/persons21710

Ketteler,  Guido
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21990

Ranke,  Wolfgang
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22071

Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
Supplementary Material (public)
There is no public supplementary material available
Citation

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.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-131C-3
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.