Probing the Dynamics of Thermal Catalysis by Vibrational Modulation Excitation Spectroscopy (A08*)

• Subject Area: Physical Chemistry of Solids and Surfaces, Material Characterisation
• Term: since 2022
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 388390466

The new project A08(N) studies the surface and bulk properties of spinel and perovskite catalysts under reaction conditions in continuously operated flow reactors by operando diffuse reflectance infrared Fourier transform (DRIFT) and Raman spectroscopy. The feed is modulated between the reaction mixture and an inert/solvent medium using specially designed dosing units. The effects of solvents and their interactions with the reactants are studied by co-feeding them at different partial pressures or concentrations, depending on the reaction being performed in the gas or liquid phase. By analyzing the phase-resolved spectroscopic data, the response of active species against the spectators will be differentiated. MCR-ALS will be also used on the transient time-resolved operando spectroscopic data to extract kinetic information.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 247: Heterogeneous Oxidation Catalysis in the Liquid Phase – Mechanisms and Materials in Thermal, Electro-, and Photocatalysis
• Major Instrumentation: tIR spectrometer
• Instrumentation Group: 1830 Fourier-Transform-IR-Spektrometer
• Applicant Institution: Ruhr-Universität Bochum
• Project Heads: Professor Dr. Martin Muhler; Dr. Sharif Najafishirtari