Project Details
Projekt
Operando characterization of catalysts during H2O2 synthesis
Applicant
Professor Dr. Jan-Dierk Grunwaldt
Subject Area
Chemical and Thermal Process Engineering
Term
since 2024
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 525028514
The aim of this project is the spectroscopic investigation of defined Pt-Au and Pd-Au model catalysts in their as-prepared state, during reaction in direct hydrogen peroxide synthesis from H2 and O2 (t-HP) and electrochemical H2O2-synthesis (e-HP) as well as after t-HP and e-HP. In order to shed light on the catalyst structure during reaction, we will apply operando characterization, particularly X-ray absorption spectroscopy (XAS) but also infrared (IR) spectroscopy. This enables us to uncover the influence of reaction conditions on catalyst structure and unravel dynamic processes such as alloying/segregation, oxidation/reduction, and adsorption/desorption of reactants, intermediates, and products during change of the reaction conditions. By combining the XAS results with complementary IR spectroscopy, we aim at correlating the reaction conditions (partial pressures, pH, potential, solvent, halide/acid promoters etc.) with catalyst performance and structure. As a result, catalytically active site motifs and surface species will be determined which will serve as feedback for catalyst preparation and input for microkinetic modeling of t-HP and e-HP.
DFG Programme
Research Units
