A high surface area K-promoted bulk Fe-catalyst is prepared without using structural stabilizers or other heteroatoms.

The catalyst is active in CO₂ hydrogenation to C₂–C₄ olefins at 300 °C and 5 barg.

The catalyst is more active than materials based on commercial α-Fe₂O₃ and Fe₃O₄.

CO is the primary product of CO₂ hydrogenation and acts as intermediate.

3 types of active sites exist, each one responsible for a different functionality.