Boosting Long-Chain\nLinear α‑Olefins\nSynthesis from CO<sub>2</sub> Hydrogenation over K–FeMn Catalyst\nvia Stabilizing Active Sites

CO<sub>2</sub> to long-chain linear α-olefins (LAOs)\nis an\neffective strategy for the production of LAOs and the realization\nof CO<sub>2</sub> resource utilization. However, effective control\nof CO<sub>2</sub> activation and chain growth to improve catalytic\nactivity and LAOs selectivity remains a great challenge. Herein, we\nreport that K–FeMn catalyst prepared by precoordinated combustion\nmethod exhibits prominent catalytic performance in the CO<sub>2</sub> hydrogenation to LAOs, which achieved more than 67% for selectivity\nof LAOs in C<sub>4+</sub> hydrocarbon and CO<sub>2</sub> conversion\nof 36.6% at 320 °C, 1.5 MPa, and 30 g<sub>cat.</sub>·h·mol<sup>–1</sup>. The structure performance of the K–FeMn catalyst\nis well correlated. The catalysts prepared by precoordinated combustion\npossessed strong interactions between Fe and Mn species, which effectively\npromoted the generation of Fe-carbides and inhibited the hydrogenation\nof the generated olefins, thereby improving the selectivity of LAOs.\nThese findings will provide a theoretical basis and guidance for an\nin-depth understanding of CO<sub>2</sub> hydrogenation to LAOs and\nthe development of efficient catalysts.