Unveiling the role of cobalt in the product regulation for CO₂ hydrogenation to light olefins over alumina-supported Co-Fe catalysts.

ABSTRACT: CoFe-based catalysts for CO₂ hydrogenation reactions have been widely studied, but the effects of cobalt on the product regulation remains largely over-looked. In the present study, we report a series of Na-decorated alumina-supported Co-Fe bimetallic catalysts with varying Co/Fe molar ratios for the direct conversion of CO₂ to light olefins. In situ XRD and Mössbauer spectroscopy reveal that Co doping significantly promotes the reduction and carburization of Fe species, leading to the formation of active CoFe alloy carbides. Furthermore, the DFT results indicate that cobalt decreases the H₂ adsorption energy, thereby regulating the surface C/H ratio and enhancing the tandem RWGS and Fischer-Tropsch reactions. These effects synergistically improve th

SUBMITTER: Liu Z 

PROVIDER: S-EPMC12257000 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature