CO₂ to long-chain linear α-olefins (LAOs) is an effective strategy for the production of LAOs and the realization of CO₂ resource utilization. However, effective control of CO₂ activation and chain growth to improve catalytic activity and LAOs selectivity remains a great challenge. Herein, we report that K–FeMn catalyst prepared by precoordinated combustion method exhibits prominent catalytic performance in the CO₂ hydrogenation to LAOs, which achieved more than 67% for selectivity of LAOs in C₄₊ hydrocarbon and CO₂ conversion of 36.6% at 320 °C, 1.5 MPa, and 30 g_cat.·h·mol^–1. The structure performance of the K–FeMn catalyst is well correlated. The catalysts prepared by precoordinated combustion possessed strong interactions between Fe and Mn species, which effectively promoted the generation of Fe-carbides and inhibited the hydrogenation of the generated olefins, thereby improving the selectivity of LAOs. These findings will provide a theoretical basis and guidance for an in-depth understanding of CO₂ hydrogenation to LAOs and the development of efficient catalysts.

中文翻译：

---

通过稳定活性位点促进 K-FeMn 催化剂上 CO2 加氢反应的长链线性 α-烯烃合成


CO₂ 制长链线性 α-烯烃 （LAO） 是生产 LAO 和实现 CO₂ 资源化利用的有效策略。然而，有效控制 CO₂ 活化和链生长以提高催化活性和 LAO 选择性仍然是一个巨大的挑战。在此，我们报道了通过预配位燃烧法制备的 K-FeMn 催化剂在 CO₂ 加氢制 LAO 中表现出突出的催化性能，在 320 °C、1.5 MPa 和 30 g_cat.·H·mol^–1.K-FeMn 催化剂的结构性能密切相关。预配位燃烧制备的催化剂在 Fe 和 Mn 物种之间具有很强的相互作用，有效地促进了 Fe-carbide 的生成并抑制了生成的烯烃的加氢，从而提高了 LAOs 的选择性。这些发现将为深入了解 CO₂ 加氢制 LAO 和开发高效催化剂提供理论依据和指导。