Unit Hartmann: Spectroscopy of functional particle surfaces

Spectroscopy of functional particle surfaces

The second section of the FPS Core Facility is headed by M. Hartmann (Erlangen Centre for Interface Research and Catalysis) and comprises various large-scale devices in the field of spectroscopy on functional surfaces. The range of methods for characterising porous adsorbents and catalysts includes classical methods for structure elucidation using X-ray diffraction on just a few grains with high sample throughput and adsorption characterisation, as well as in situ/operando measurement technology in the fields of IR and UV-Vis spectroscopy and solid-state NMR spectroscopy [1, 9-10]. One focus here is surface characterisation under application-relevant conditions (pressure, temperature, continuous flow). This is only possible in a few laboratories worldwide, particularly in the field of solid-state NMR spectroscopy, and is supplemented by set-ups for in-situ diffraction, IR and UV-Vis spectroscopy in the temperature range from 77 k to approx. 673 K. A solvothermal reactor with extensive in situ measurement technology (Fourier-transformed infrared spectroscopy, UV-Vis, photoluminescence spectroscopy, turbidity, pH, conductivity, oxygen content) is used for this purpose [2]. Several SHG (Second Harmonic Generation) and SFG (Sum Frequency Generation) spectrometers are used to analyse interfaces by means of non-linear optical spectroscopy. The application-relevant testing of adsorption and catalytic properties is carried out in the gas and liquid phase in continuously operated adsorbers or reactors, in which the product composition is monitored online using gas chromatography.