Confinement-induced acceleration of CO₂ mineralization through interfacial water thinning.

ABSTRACT: Current projections demand atmospheric CO₂ removal at the gigatonne-per-year scale through mineral carbonation, yet conventional aqueous routes remain energy-intensive and kinetically limited. Here we apply a water thinning strategy to engineer the interfacial water-film (IWF) with thicknesses below 8.5 nm. We achieve complete carbonation of calcium hydroxide (Ca(OH)₂) within 1 h under ambient conditions, realizing a 16-fold acceleration compared to bulk solution systems. The IWF exhibits confinement-induced saturation kinetics, with the reaction rate increasing with CO₂ partial pressure and then approaching a plateau around 2.02 kPa. Within this film, pocket-like sites in the water confined between particles use oriented interfacial hydroxyls to organize C

SUBMITTER: Su M 

PROVIDER: S-EPMC12855977 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature