Effective perspiration is essential to uphold the stability of zero-gap MEA-based cathodes used in CO₂ electrolysers.

ABSTRACT: The application of gas diffusion electrodes (GDEs) for the electrochemical reduction of CO₂ to value-added products creates the possibility of achieving current densities of a few hundred mA cm^-2. To achieve stable operation at such high reaction rates remains, however, a challenging task, due to the flooding of the GDE. In order to mitigate flooding in a zero-gap membrane-electrode assembly (MEA) configuration, paths for effective electrolyte perspiration inside the GDE structure have to be kept open during the electrolysis process. Here we demonstrate that apart from the operational parameters of the electrolysis and the structural properties of the supporting gas diffusion layers, also the chemical composition of the applied catalyst inks can play a decisive role i

SUBMITTER: Hu H 

PROVIDER: S-EPMC9990144 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature