Metal Ionic Liquids for the Rapid Chemical Fixation of CO2 under Ambient Conditions

Abstract CO 2 cycloaddition is an important reaction for chemical fixation of CO 2 . It is desirable to design facile and green route for the efficient CO 2 cycloaddition reaction, especially at ambient conditions. Here we propose a novel route for CO 2 cycloaddition by utilizing metal ionic liquid (MIL) as both reaction media and catalyst. Outstandingly, propylene oxide can be completely converted to propylene carbonate with more than 99.0 % yield and more than 99 % selectivity at room temperature and atmospheric pressure. This strategy is efficient, facile, environmentally benign, which involves no additional catalyst and can easily recycle the MIL after reaction. It has potential for the practical procedure of gas separation and CO 2 utilization in industrial waste gas.