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

A bifunctional MOF@POP core-shell catalyst (NH 2 -UiO-66(Hf)@CoTPy-CAP) constructed by amino functionalized NH 2 -UiO-66(Hf) and ionic porphyrin-based CoTPy-CAP was first reported to be applied in the cycloaddition of CO 2 . Because NH 2 -UiO-66(Hf)@CoTPy-CAP both possess abundant Lewis acidic sites and nucleophilic centers in one system, the catalyst can efficiently catalyze CO 2 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 CO 2 fixation without cocatalyst under mild conditions.