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TY  - THES
AU  - Theussl, Verena
TI  - Degradation and failure mechanisms of gas diffusion electrodes for electroreduction of CO<sub>2</sub> in aqueous electrolytes
PB  - RWTH Aachen University
VL  - Dissertation
CY  - Aachen
M1  - RWTH-2025-10913
SP  - 1 Online-Ressource : Illustrationen
PY  - 2025
N1  - Veröffentlicht auf dem Publikationsserver der RWTH Aachen University 2026
N1  - Dissertation, RWTH Aachen University, 2025
AB  - To counteract global warming, triggered by the rising levels of anthropogenic greenhouse gas CO2 in the atmosphere, carbon capture and utilisation technology (CCU), which includes the electroreduction of CO2, is a promising strategy. This technology not only valorises an otherwise harmful gas but also enables the closing of the anthropogenic carbon cycle, which could help to reduce the CO2 levels in the atmosphere. Gas diffusion electrodes (GDE) play a central role in investigating the electroreduction of CO2, as they ensure optimal contact between the catalyst, CO2, and the electrolyte/ions, thereby defining an optimal reaction environment. To advance the technical maturity of the electroreduction of CO2 to formate, this thesis investigates factors influencing the optimal reaction environment, i.e., wettability, degradation mechanisms, and cell structure, based on the electrode architecture. This dissertation emphasises the importance of a microporous layer (MPL) for achieving relevant current densities and Faradaic Efficiencies (FE). The MPL influences the focus of the catalyst layer on the GDE surface, the wetting, and the electrical conductivity, leading to an improved interface between the catalyst, the electrolyte and CO2. This improved catalyst interface enables obtaining relevant current densities and FE Formate >80
LB  - PUB:(DE-HGF)11
DO  - DOI:10.18154/RWTH-2025-10913
UR  - https://publications.rwth-aachen.de/record/1024000
ER  -