Highly Selective CO₂ Reduction to Pure Formic Acid Using a Nafion-TiO₂ Composite Porous Solid Electrolyte.

ABSTRACT: The electrochemical reduction of CO₂ (CO₂RR) to liquid fuels and chemicals offers a sustainable route to close the carbon cycle. Solid-state electrolyte (SSE) systems have recently emerged as a breakthrough platform, enabling the direct synthesis of high-purity liquid products. Here, a novel Nafion-based porous solid electrolyte (NPSE) with tunable thickness and porosity is presented, replacing conventional bead-type ion-exchange resins. The structural tunability of NPSEs plays a critical role in determining CO₂RR performance. Furthermore, a Nafion-titanium dioxide (TiO₂) composite NPSE (NPSE-TiO₂) is developed, in which TiO₂ nanoparticles significantly enhance the selectivity and productivity of formic acid. The NPSE-TiO

SUBMITTER: Kang Y 

PROVIDER: S-EPMC12786315 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature