Polyoxometalate-based ionic liquids-promoted CO2 conversion

Polyoxometalates (POMs) are a class of molecular metal oxides, showing numerous applications in various chemical processes due to their unique acid/base and redox features. By adjusting the tunable molecular structures of the anions and counter cations, plenty of POM-based ionic liquids (POM-based ILs) have been fabricated to be used in various fields, such as catalysis, structural chemistry and material science. As a class of excellent catalysts, POM-based ILs have shown advantages in the emerging field of CO2 utilization such as CO2 capture, cycloaddition of CO2 to epoxides, and reduction of CO2, owing to the efficient activation of CO2 by POM anions. This review summarizes recent advances in the catalysis of POM-based ILs, and particularly highlights the areas that are related to CO2 conversion.