Recent Advances in CO2 Hydrogenation to Light Olefins

• • Fe-based catalysts promoted with Na achieve CO2 conversion up to 40% and light olefin selectivity exceeding 50%, demonstrating the critical role of alkali promoters in enhancing RWGS activity and suppressing methane formation. • • The addition of Mn to Fe-based catalysts modulates catalyst restructuring, enabling control over olefin/paraffin ratio; specific data from Yang et al. (Nat. Catal. 2025) show improved olefin selectivity under industrially relevant conditions. • • Bifunctional catalysts combining ZnZrOx oxides with zeolites (e.g., SAPO-34) achieve direct CO2-to-olefin conversion with selectivity >80% at CO2 conversion around 10-20%, highlighting the potential of tandem catalysis. • • Zeolite pore structure and acidity critically determine product distribution; for instance, SSZ-13 with appropriate acidity yields high propylene selectivity, as demonstrated by Chen et al. (Angew. Chem. 2024).