Hydrogenation of CO2 to Formate with a Highly Active Solid Ruthenium Phosphine

Abstract

AbstractThere is widespread interest in the hydrogenation of CO2 to produce high‐energy substances such as formic acid. Herein, ruthenium trichloride was immobilized on porous phosphine polymers (Ru/KAPs‐Ph‐PPh3) and gave excellent catalytic activity in the hydrogenation of CO2 to produce formate. With the assistance of 1,8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU), a high turnover number (TON) of up to 1470000 was obtained in 12 hours at 120 °C and a total pressure of 6 MPa (P(H2)/P(CO2)=1 : 1), with average TOFs of 122500 h−1. Moreover, the catalyst can be easily recovered by filtration with acceptable catalytic effectiveness.