The CAT beamline offers hard X-ray spectroscopy for in-situ and in-operando studies including the following methods:

X-ray Absorption Spectroscopy for elements between K and Er

  • Information about the local atomic geometry (EXAFS)
  • Chemical state of the absorbing atom (XANES)
  • Investigations on ordered (crystalline) and disordered (amorphous, liquid) materials
  • Dilute species and light elements (XAS in fluorescence mode)
  • In situ and operando cells for measurements under reaction conditions

The group of Prof. J.-D. Grunwald developed and implemented following operando setups:


  • Capillary based microreactor with hot air gas blower heating system
  • High temperature capillary based microreactor in compact oven
  • High pressure operando cell
  • Batch reactor for the reaction on liquid systems

Planned Techniques

Fluorescence Spectroscopy, XAS measurements in fluorescence mode, X-ray Emission Spectroscopy

  • High sensitivity for low concentrations

Diffraction experiments

  • Investigation of longe range order, crystalline phases and crystallite sizes, support materials

Infrared Spectroscopy

  • Analysis of species adsorbed on catalyst surfaces