English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

In Situ Investigation of the nature of the active surface of a vanadyl pyrophosphate catalyst during the n-butane oxidation to maleic anhydride

MPS-Authors
/persons/resource/persons21590

Hävecker,  Michael
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21853

Mayer,  Ralf W.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21743

Knop-Gericke,  Axel
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21376

Bluhm,  Hendrik
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21730

Kleimenov,  Evgueni
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21811

Liskowski,  Andrzej
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22148

Su,  Dang Sheng
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21922

Ogletree,  D. Frank
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22071

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

Locator
There are no locators available
Fulltext (public)
There are no public fulltexts available
Supplementary Material (public)
There is no public supplementary material available
Citation

Hävecker, M., Mayer, R. W., Knop-Gericke, A., Bluhm, H., Kleimenov, E., Liskowski, A., et al. (2003). In Situ Investigation of the nature of the active surface of a vanadyl pyrophosphate catalyst during the n-butane oxidation to maleic anhydride. Journal of Physical Chemistry B, 107(19), 4587-4596.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-11E3-F
Abstract
In situ X-ray absorption spectroscopy (XAS) and in situ X-ray photoelectron spectroscopy (XPS) have been applied to study the active surface of vanadium phosphorus oxide (VPO) catalysts in the course of the oxidation of n-butane to maleic anhydride (MA). The V L3 near edge X-ray absorption fine structure (NEXAFS) of VPO is related to the details of the bonding between the central vanadium atom and the surrounding oxygen atoms. Reversible changes of the NEXAFS were observed when going from room temperature to the reaction conditions. These changes are interpreted as dynamic rearrangements of the VPO surface, and the structural rearrangements are related to the catalytic activity of the material that was verified by proton transfer reaction mass spectrometry (PTR-MS). The physical origin of the variation of the NEXAFS is discussed and a tentative assignment to specific V-O bonds in the VPO structure is given. In situ XPS investigations were used to elucidate the surface electronic conductivity and to probe the ground state of the NEXAFS spectra.