Efficient CO2 Hydrogenation to Formate with a Continuous-Flow System under Mild Conditions Catalyzed by Ir-Based Porous Organic Polymer.

Developing a continuous-flow carbon dioxide hydrogenation system under mild conditions is an essential approach to improve production efficiency and safety. Herein, a series of efficient Ir-based porous organic polymers (KAPs-Ir) are reported for the continuous-flow CO2 hydrogenation to formate. Under mild conditions (80 °C and 0.4 MPa), the productivity of 10 403 mmolFA gIr -1 h-1 is obtained using a KAPs-Ir catalyst (KAPs-1c Ir: 0.37 wt%), which is two times higher than the best result reported to date (obtained at 140 °C and 12 MPa). The catalytic reactivity is maintained well for at least 240 h, exhibiting excellent stability.