MOF@POP core–shell architecture as synergetic catalyst for high-efficient CO2 fixation without cocatalyst under mild conditions

A bifunctional [email protected] core-shell catalyst (NH2-UiO-66(Hf)@CoTPy-CAP) constructed by amino functionalized NH2-UiO-66(Hf) and ionic porphyrin-based CoTPy-CAP was first reported to be applied in the cycloaddition of CO2. Because NH2-UiO-66(Hf)@CoTPy-CAP both possess abundant Lewis acidic sites and nucleophilic centers in one system, the catalyst can efficiently catalyze CO2 fixation with epoxides without homogeneous cocalyst under mild conditions, achieving propylene oxide (PO) conversion of 98 % at 80 °C and 0.5 MPa. Furthermore, the bifunctional synergetic catalyst was easy to be recovered and recycled for five runs, and the reduction of activity was not obvious. This present work provides a viable direction for the fabrication of bifunctional synergetic catalysts for high-efficient CO2 fixation without cocatalyst under mild conditions.