Methods

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