Topics in Catalysis

, Volume 23, Issue 1, pp 99–107

In Situ Surface Analysis in Selective Oxidation Catalysis: n-Butane Conversion Over VPP

  • H. Bluhm
  • M. Hävecker
  • E. Kleimenov
  • A. Knop-Gericke
  • A. Liskowski
  • R. Schlögl
  • D.S. Su
Article

DOI: 10.1023/A:1024824404582

Cite this article as:
Bluhm, H., Hävecker, M., Kleimenov, E. et al. Topics in Catalysis (2003) 23: 99. doi:10.1023/A:1024824404582

Abstract

In situ analysis of the surface of a working selective oxidation catalyst is an essential yet rarely conducted experiment in attempts to derive structure–function relationships. The case study of n-butane oxidation over vanadyl pyrophosphate (VPP) is used to develop a general working hypothesis and to illustrate that the molecular properties of the substrate sets boundary conditions on the surface chemical properties of the catalyst. Experiments using in situ X-ray photoelectron spectroscopy (XPS) and in situ low-energy X-ray absorption spectroscopy are used to derive compositional, electronic, and geometric structural information of the surface of the working VPP. These data allow the conclusion that a surface phase different from VPP must be present covering at least part of the active material. The recent data together with literature observations are used to derive a scenario explaining the function of VPP as a unique catalytic system.

n-butane oxidationVPPVPOin situ XPSin situ VL-edge NEXAFSTEM

Copyright information

© Plenum Publishing Corporation 2003

Authors and Affiliations

  • H. Bluhm
    • 1
  • M. Hävecker
    • 1
  • E. Kleimenov
    • 1
  • A. Knop-Gericke
    • 1
  • A. Liskowski
    • 1
  • R. Schlögl
    • 1
  • D.S. Su
    • 1
  1. 1.Department of Inorganic ChemistryFritz-Haber Institut der Max-Planck-GesellschaftBerlinGermany