CO2 hydrogenation on catalysts based on Fe–Co double complex salts

A FeCo catalyst obtained by thermolysis of double complex salts (DCSs) was used for the selective hydrogenation of CO₂ to CH₄. The DCS-based catalyst did not require activation, and its structure remained unchanged either during high-temperature treatment with H₂ or CO or under the process conditions of CO₂ hydrogenation; therefore, the catalyst selectivity was not subject to structural changes.