Novel and highly efficient electro-catalytic cycloaddition of CO2 and epoxides to cyclic carbonates over reusable ionic liquid-based cooperative catalytic system

Abstract

A novel and highly efficient electro-catalytic protocol for the synthesis of cyclic carbonates from epoxides and CO₂ using 1-aminopropyl-3-methylimidazolium dicyanamide ([APMIm]DCA) as the supporting electrolyte, graphite as the anode, and Ti/TiO₂-CNT-Pt as the cathode has been developed. Based on the cooperative effect between active Ti/TiO₂-CNT-Pt cathode and active sites of supporting ionic liquid electrolyte [APMIm]DCA, CO₂ and epoxides could be effectively converted into the corresponding cyclic carbonates in high to excellent yields under mild conditions. Moreover, the electro-catalytic system could be easily recovered and reused for six successive cycles without a considerable decrease in catalytic activity. This work provides a sustainable and efficient cooperative strategy for the chemical fixation of carbon dioxide into valuable cyclic carbonates.