Although many researchers have reported CO₂ hydrogenation to various C1 chemicals, it is still challenging to directly and selectively convert CO₂ to C₂-C₄ hydrocarbons in terms of overcoming the extreme inertness of CO₂ and a high CC coupling barrier. In the present work, we report an efficient integration of methanol-synthesis and the methanol-to-hydrocarbons with the bifunctional catalyst component of In₂O₃-ZrO₂ and SAPO-5. These tandem reactions exhibit an excellent relative selectivity of C₂-C₄ (83%) with a suppressed CH₄ relative selectivity less than 3% at T = 300 °C. A detailed analysis indicates that the partially reduced indium oxide surface (In₂O₃-ZrO₂) can better activate CO₂ and promote the synthesis of methanol than In₂O₃ alone, and CC coupling is subsequently manipulated within the confined acidic pores of SAPO-5 according to XRD, H₂-TPR, CO₂-TPD, SEM and TEM. Furthermore, the proximity of two components and the content of Si also play an important role in such outstanding selectivity to C₂-C₄. Our study paves a new path for the direct synthesis of lower hydrocarbons.

尽管许多研究人员已经报道了将CO ₂加氢成各种C1化学物质，但是要克服CO ₂的极度惰性和高C C耦合势垒，将CO ₂直接和选择性地转化为C ₂ -C ₄烃仍然是挑战。在本工作中，我们报告了甲醇合成和甲醇制烃与In ₂ O ₃ -ZrO ₂和SAPO-5的双功能催化剂组分的有效结合。这些串联反应在抑制CH _{4的情况下}显示出极好的C ₂ -C ₄相对选择性（83％）在T = 300°C时，相对选择性小于3％。详细的分析表明，部分还原的氧化铟表面（In ₂ O ₃ -ZrO ₂）比单独使用In ₂ O ₃可以更好地活化CO ₂并促进甲醇的合成，随后在封闭的酸性孔中操纵C C偶联。根据XRD，H ₂ -TPR，CO ₂ -TPD，SEM和TEM对SAPO-5进行分析。此外，在对C ₂ -C _4的如此优异的选择性中，两个成分的接近度和Si的含量也起着重要的作用。我们的研究为直接合成低碳氢化合物开辟了一条新途径。