(149c) Direct Hydrogenative Conversion of CO2 to Liquid Hydrocarbons Using Tandem Heterogeneous Catalyst

The direct hydrogenative conversion of CO₂ to high-value liquid hydrocarbons provides an important route for the realization of carbon neutrality and mitigation of climate change. However, the high inertness of CO₂ and the high activation barrier associated with C–C coupling hinder the feasibility of CO₂ conversion and make this process challenge. Here, we report a highly active, selective, productive, and stable multifunctional heterogeneous catalyst, which achieved exceptional performance for the production of liquid hydrocarbons with high productivity and low CO selectivity. We found that this outstanding performance was originated from the interfacial contact with adjacent reverse water–gas shift (RWGS) active components and Fischer–Tropsch synthesis (FTS) active components, which showed tandem catalysis. The catalytic performances were optimized through control of catalyst composition and reaction condition with temperature, pressure and gas hourly space velocity. Partially produced CO on the RWGS active sites is consecutively hydrogenated to C–C coupled hydrocarbons on the FTS active sites. During the CO hydrogenation step, carbon chain growth is promoted by K-addition, resulting in a high hydrocarbon productivity. The catalytic performance was highly sustainable without deactivation for 10 days. These findings can provide inspiration for novel catalyst designs and conversions of CO₂ into high-value chemicals.