A bifunctional MOF@POP 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.

首次报道了由氨基官能化的NH ₂ -UiO-66（Hf）和基于离子卟啉的CoTPy-CAP构成的双功能MOF @ POP核壳催化剂（NH ₂ -UiO-66（Hf）@ CoTPy-CAP）是应用于CO ₂的环加成反应。因为NH ₂ -UiO-66（Hf）@ CoTPy-CAP在一个系统中都具有丰富的路易斯酸性位点和亲核中心，所以该催化剂可以有效地催化CO _2。在温和的条件下用无均相催化剂的环氧化物固定，在80°C和0.5 MPa下实现98％的环氧丙烷（PO）转化率。此外，双功能协同催化剂易于回收和循环使用五次，活性降低不明显。本工作为在温和条件下无需助催化剂的高效CO ₂固定双功能协同催化剂的制备提供了可行的方向。