Electrocatalysis
Our research focuses on investigating electrochemical reactions at solid-liquid interfaces on electrodes and single cells, with a particular emphasis on technologies relevant to the energy transition. Specifically, we are currently studying the CO2 reduction reaction, oxygen evolution reaction in PEM water electrolysis, electrolysis of biomass, and technical organic electrosynthesis processes. We analyze the interplay between electrode kinetics, mass transport, material properties, and product formation during electrochemical reactions. By combining physicochemical models and experimental investigations in the laboratory, we aim to identify and analyze electrocatalytic processes to gain fundamental and technically relevant insights into the interaction of these processes and their operating limits, which are crucial for the development of future-oriented technologies.
To achieve this goal, our laboratory utilizes online diagnostic and dynamic experimental methods. With our dynamic analysis approach, we can break down complex electrochemical processes into individual subprocesses by differentiating their time constants and analyzing them separately. This approach enables us to identify limiting processes and relevant parameters more precisely than conventional methods. We further support this with model-based analysis and simulations.
Our laboratory employs various experimental techniques, such as cyclic voltammetry (CV), rotating disk electrode (RDE) experiments, electrochemical impedance spectroscopy (EIS), nonlinear impedance spectroscopy (NFRA), differential electrochemical mass spectrometry (DEMS), gas or liquid chromatography coupled with mass spectrometry (HS-GC-MS, HPLC-MS), surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS), and UV-Vis spectroscopy.
Our model-based approach allows us to systematically analyze electrochemical processes from microkinetic to macrokinetic scales, including complex mass transport. Experimentally validated reaction kinetics and thermodynamic energy values (from DFT) serve as the basis for our physicochemical models and simulations. We apply rigorous mathematical optimization strategies to systematically improve processes or perform scenario-based analyses to determine operating parameters and process conditions.
Open positions and bachelor and master theses in our working group can be found here.
Contact: Dr. Philipp Röse (Group Leader)
Topic | Contact |
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Multi-scale analysis of complex three-phase systems: O2 and CO2 reduction at silver-based gas-diffusion electrodes in aqueous electrolyte (DFG Research Unit 2397)
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M.Sc. Inga Dorner |
Carbon dioxide reduction reaction (CO2RR) on copper-based electrocatalysts (Helmholtz-Program MTET; Topic 3, Subtopic 2: Power-based Fuels and Chemicals) | |
Dynamic kinetic multi-scale analysis of IrO2 electrodes for oxygen evolution reaction (OER) in PEM-electrolysis under technical-realistic operation conditions (H2Giga) | M.Sc. Gözde Kardes |
Electrolysis of Biomass (ELOBIO; EIC Pathfinder Challenge: Novel Routes to Green Hydrogen Production). | M.Sc. Swantje Pauer |
Electrification of Technical Organic Syntheses (ETOS; BMBF-Cluster4Future-Initiative) | |
Digital Electrolyzer Design for Technical Organic Synthesis (DigiE-tos; BMBF-Cluster4Future ETOS) | M.Sc. Paul Neugebauer, N.N. |
Development and Analysis of a Large-Scale Electrolyzer for Long-Term Operation (EAGLE; BMBF-Cluster4Future ETOS) | M.Eng. Michael Küttinger |
Laplace Pressure Controlled Gas Diffusion Electrodes for Organic Electrosynthesis (GDE4OES; BMBF-Cluster4Future ETOS) | M.Sc. Qing Gong |
Shared Pool of Electrode Materials and Electrolysis Cells (Pool MAZEL; BMBF-Cluster4Future ETOS) | Dr. Philipp Röse |
Topic | Contact |
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Structure-performance relationships of Ir-Ru electrodes for oxygen evolution reaction (OER) during dynamic operation (DFG Priority Programm SPP2080) | M.Sc. Janis Geppert |
Title | Type | Supervisor | Status |
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Electrochemical Characterization of a Power-to-Chemicals Process | Bachelor/Master Thesis | open |
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Method Development for Catalyst Performance Analysis in PEM Water Electrolysis | Bachelor/Master Thesis | open |
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Analysis of the Influence of Diffusion, Convection and Migration in the CO2 Reduction Reaction at Silver Gas Diffusion Electrodes | Master Thesis | open |
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Characterization of Products of Electrochemical CO2 Reduction in Organic Solvents | Bachelor/Master Thesis | open |
Title | Type | Supervisor | Person in Charge |
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Model-based Analysis of CuZn Catalysts for CO2 Electrolysis (Power-to-X) | Master thesis | Medine Ciftdag |
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Model-based Analysis of Green Hydrogen Production by Electrolysis of Bio-based Materials | Bachelor/ Master Thesis | Saïd Chokri |
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Validation of the Dynamics of Microkinetic Modeling for Oxygen Evolution on IrO2 | Bachelor thesis | Theodor Mosk |