Cobalt-Based Non-Precious Metal Catalysts Derived from Metal-Organic Frameworks for High-Rate Hydrogenation of Carbon Dioxide.

The development of cost-effective catalysts with both high activity and selectivity for carbon-oxygen bond activation is a major challenge and has important ramifications for making value-added chemicals from carbon dioxide (CO). Herein, we present a one-step pyrolysis of metal organic frameworks (MOFs) that yields highly-dispersed cobalt nanoparticles (Co NPs) embedded into a carbon-matrix which shows exceptional catalytic activity in the reverse water gas shift (RWGS) reaction. Incorporation of nitrogen into the carbon-based supports resulted in increased reaction activity and selectivity towards carbon monoxide (CO), likely due to the formation of a Mott-Schottky interface. At 300 ºC and a high space velocity of 300,000 mL g h, the catalyst exhibited a CO conversion rate of 122 μmol g s, eight times higher than that of a reference Cu/ZnO/AlO catalyst. Our experimental and computational results suggest that nitro-gen-doping lowers the energy barrier for the formation of formate intermediates (CO2*+H* → COOH*), in addition to the redox mechanism (CO* → CO* + O*). This enhancement is attributed to the efficient electron transfer at the cobalt-support interface, leading to higher hydrogenation activity and opening new avenues for the development of CO conversion technology.