Rational Design of Single-Layer Carbon-Supported Cu-B GDE for CO2 Electroreduction to C2+ Products

Kurzfassung

As this contribution will show, the manufacturing parameters and the composition of the GDE have large impacts on both the selectivity towards the desired products and overall lifetime. Herein, we conducted electrochemical measurements and evaluated product spectrum and electrochemical performance of GDEs with various conditions, e.g., catalyst loading, binder content, and dry-pressing pressure. In addition, multiple pre-/post-mortem characterization techniques, such as TGA, Hg porosimetry, four-point probe, SEM, and ICP-MS were employed and combined with electrochemical impedance spectroscopy to investigate the wetting behavior and catalyst leaching. Using this approach, we are able to decrypt the factors that could influence the selectivity and stability of carbon-supported Cu-B GDE. Beyond that, this study sheds light on future GDE engineering with other catalytic active materials.