Unexpected Oversolubility of CO₂ Measured at Electrode-Electrolyte Interfaces.

ABSTRACT: Enhancements in gas solubility in pore-confined liquids─termed oversolubility─can drastically influence gas separation and catalytic efficiency in confined environments; however, they remain poorly understood in electrochemical CO₂ capture and reduction systems. While previous investigations of oversolubility have emphasized the importance of mesoporosity and incomplete pore saturation by the solvent, in this work, we report an unprecedented 30-fold oversolubility effect for CO₂ in solely microporous activated carbons saturated with 1 M Na₂SO_4(aq). The oversolubility effect occurs regardless of the activated carbon's functional groups and level of disorder and is enhanced for smaller pore sizes. Oversolubility is quantified using solid-state

SUBMITTER: Coady Z 

PROVIDER: S-EPMC12512178 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature