FeZr – Fe5C2 interfacial boosts the synthesis of linear α‐olefin from CO2 hydrogenation via enhanced CO adsorption

Abstract The directed synthesis of linear α‐olefins (LAOs) from CO2 and renewable green hydrogen is important for increasing the yield of LAOs and realizing the CO2 resource utilization. Here, we report a K‐FeZr catalyst with a FeZr–Fe5C2 interface, which exhibited excellent performance at 320°C, 1.5 MPa, and 7500 mL·gcat−1·h−1, with a 13.0% LAOs yield and achieving a 39.1% CO2 conversion. The characterization results indicated that the FeZr–Fe5C2 interface significantly improved the catalytic activity through a multicomponent synergistic effect. The oxygen vacancies on the surface of the ZrO2 support effectively anchored the Fe species, and the K promoter enhanced the carburization capacity of Fe and the dissociation of CO. The FeZr component exhibited strong adsorption capacity for the reactants and key intermediates, which promoted the C‐C coupling on the Fe5C2 active site. These findings will contribute to the development of new and efficient catalysts for CO2 hydrogenation.