ABSTRACT

Consecutive development of materials, components, and ultimately, devices does not appear to be a promising strategy in CO₂ electroreduction because maintaining comparability and transferring results between idealized and application-oriented systems proves challenging. A modular cell design and tracking cell conditions via sensors may be a solution. We displayed a strategy to characterize gas diffusion electrode operating regimes in a flow cell with regard to different current density ranges, as well as the impact of the flow gap design. We revealed strong interdependencies between cell components, their functions as well as individual cells when integrated into a stack. Expanding the scope and resolution of experimental data made new information on the change of system parameters in flow cells accessible.