Recent Advances in Hydrogenation of CO₂ to CO with Heterogeneous Catalysts Through the RWGS Reaction

Abstract

With the continuous increase in CO2 emissions, primarily from the combustion of coal and oil, the ecosystem faces a significant threat. Therefore, as an effective method to minimize the issue, Reverse Water Gas Shift (RWGS) reaction which converts CO2 towards CO attracts much attention, is an environmentally‐friendly method to mitigate climate change and lessen dependence on fossil fuels. Nevertheless, the inherent thermodynamic stability and kinetic inertness of CO2 is a big challenge under mild conditions. In addition, it remains another fundamental challenge in RWGS reaction owing to CO selectivity issue caused by CO2 further hydrogenation towards CH4. Up till now, a series of catalysis systems have been developed for CO2 and H2 reduction reaction to produce CO. Herein, the research progress of the well‐performed heterogeneous catalysts for the RWGS reaction were summarized, including the catalyst design, catalytic performance and reaction mechanism. This review will provide insight into efficient utilization of CO2 and will promote the development of RWGS reaction.

Regulating the selectivity through ionomer–catalyst interactions for high-efficiency electrocatalytic CO2 reduction

“…Among the CO 2 conversion products, CO could serve as a pivotal platform chemical in the chemical industry and be further converted to various valuable chemicals through established techniques, such as Fischer–Tropsch synthesis. 1,2 Compared to the thermocatalytic reverse water–gas shift (RWGS) reaction for CO 2 -to-CO conversion usually proceeding at high temperatures, 3 CO 2 RR offers significant advantages of mild reaction conditions 4 and direct utilization and storage of renewable energy. 5 To date, great efforts have been devoted to CO 2 RR to produce CO, primarily focusing on catalyst design for achieving high faradaic efficiencies (FEs) and minimizing energy cost.…”