When Flooding Is Not Catastrophic-Woven Gas Diffusion Electrodes Enable Stable CO₂ Electrolysis.

ABSTRACT: Electrochemical CO₂ reduction has the potential to use excess renewable electricity to produce hydrocarbon chemicals and fuels. Gas diffusion electrodes (GDEs) allow overcoming the limitations of CO₂ mass transfer but are sensitive to flooding from (hydrostatic) pressure differences, which inhibits upscaling. We investigate the effect of the flooding behavior on the CO₂ reduction performance. Our study includes six commercial gas diffusion layer materials with different microstructures (carbon cloth and carbon paper) and thicknesses coated with a Ag catalyst and exposed to differential pressures corresponding to different flow regimes (gas breakthrough, flow-by, and liquid breakthrough). We show that physical electrowetting further limits the flow-by regime

SUBMITTER: Baumgartner LM 

PROVIDER: S-EPMC9795489 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature