Macro- and Nano-Porous Ag Electrodes Enable Selective and Stable Aqueous CO₂ Reduction.

ABSTRACT: Electrochemical carbon dioxide (CO₂) reduction from aqueous solutions offers a promising strategy to overcome flooding and salt precipitation in gas diffusion electrodes used in gas-phase CO₂ electrolysis. However, liquid-phase CO₂ electrolysis often exhibits low CO₂ reduction rates because of limited CO₂ availability. Here, a macroporous Ag mesh is employed and activated to achieve selective CO₂ conversion to CO with high rates from an aqueous bicarbonate solution. It is found that activation of Ag surface using oxidation/reduction cycles produces nanoporous surfaces that favor CO₂-to-CO conversion. Notably, it is found that a combination of dissolved CO₂ in bicarbonate solution with CO₂ gen

SUBMITTER: Nourmohammadi Khiarak B 

PROVIDER: S-EPMC11855228 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature