Geometric Catalyst Utilization in Zero-Gap CO₂ Electrolyzers.

ABSTRACT: The electrochemical reduction of CO₂ (CO₂RR) on silver catalysts has been demonstrated under elevated current density, longer reaction times, and intermittent operation. Maintaining performance requires that CO₂ can access the entire geometric catalyst area, thus maximizing catalyst utilization. Here we probe the time-dependent factors impacting geometric catalyst utilization for CO₂RR in a zero-gap membrane electrode assembly. We use three flow fields (serpentine, parallel, and interdigitated) as tools to disambiguate cell behavior. Cathode pressure drop is found to play the most critical role in maintaining catalyst utilization at all time scales by encouraging in-plane CO₂ transport throughout the gas-diffusion layer (GDL) and aroun

SUBMITTER: Subramanian S 

PROVIDER: S-EPMC9841604 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature