Na doped FeZn catalyst prepared by urea self-combustion method for efficient conversion of CO₂ into liquid fuels

Although catalytic conversion of CO₂ into liquid fuels has made tremendous progress, designing a promising catalyst with excellent CO₂ conversion and C₅₊ selectivity remains a challenge. In this study, a series of Na-FeX (X = Co, Zn, and Mn) catalysts were prepared by the facile urea self-combustion method. Meanwhile, these catalysts were characterized by various characterizations such as N₂ adsorption/desorption, XRD, SEM, TEM, H₂-TPR, H₂-TPD, etc. In detail, Na–FeZn exhibited 36.4% CO₂ conversion and 60.6% C₅₊ selectivity at 320 °C and 3.5 MPa. In combination with the results of characterization and experiment, we found that the addition of Zn and Na could enhance CO₂ adsorption on the surface of catalyst and promote it conversion into liquid fuels. Furthermore, over in-situ DRIFTS spectra, a possible reaction mechanism was proposed. This work not only provides a simple and fast catalyst preparation method for Fe-based catalyst, but also opens a new avenue for direct conversion of CO₂ to liquid fuels.