Narrow Pressure Stability Window of Gas Diffusion Electrodes Limits the Scale-Up of CO₂ Electrolyzers.

ABSTRACT: Electrochemical CO₂ reduction is a promising process to store intermittent renewable energy in the form of chemical bonds and to meet the demand for hydrocarbon chemicals without relying on fossil fuels. Researchers in the field have used gas diffusion electrodes (GDEs) to supply CO₂ to the catalyst layer from the gas phase. This approach allows us to bypass mass transfer limitations imposed by the limited solubility and diffusion of CO₂ in the liquid phase at a laboratory scale. However, at a larger scale, pressure differences across the porous gas diffusion layer can occur. This can lead to flooding and electrolyte breakthrough, which can decrease performance. The aim of this study is to understand the effects of the GDE structure on flooding behavior and

SUBMITTER: Baumgartner LM 

PROVIDER: S-EPMC9006256 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature