In this work, multi-promoters, including potassium, manganese and titanium, were incorporated into iron catalyst for improving CO₂ hydrogenation and the influences of each promoter were investigated in detail. Besides, the content of each component was optimized to achieve a well-matching tandem catalysis performance between reverse water gas shift (RWGS) reaction and chain propagation reaction. The results showed that the introduction of potassium could improve the RWGS reaction and chain growth capacity by utilizing abundant oxygen vacancy, and strong competitive adsorption. With the further addition of manganese, more active carbides sites with benign dispersion were detected owing to the strong interaction between manganese and iron species. When titanium was added, the catalytic performance of the catalyst was improved by the stronger CO₂ adsorption capacity and longer resistance time of reactants. Therefore, the well-matching catalysis between RWGS and chain propagation was achieved on the corresponding K₃/FeMn₁₀Ti₂₀ catalyst, achieving C₅₊ yield as high as 1282.7 ${\text{g}}_{\text{fuel}}{\text{kg}}_{\text{cat}}^{\text{-1}}{\text{h}}^{\text{-1}}$ at CO₂ conversion of 44.9 % and maintaining a rather low by-products selectivity (9.6 % for CO, 12.8 % for CH₄).

在这项工作中，将钾、锰和钛等多种促进剂掺入铁催化剂中以改善 CO ₂详细研究了氢化反应和每种促进剂的影响。此外，优化了各组分的含量，以在逆水煤气变换（RWGS）反应和链增长反应之间实现良好匹配的串联催化性能。结果表明，钾的引入可以利用丰富的氧空位和强竞争吸附来提高RWGS反应和链增长能力。随着锰的进一步添加，由于锰和铁物种之间的强相互作用，检测到更多具有良性分散的活性碳化物位点。添加钛后，催化剂的催化性能因更强的CO ₂而提高反应物的吸附能力和更长的耐受时间。因此，在相应的K ₃ /FeMn ₁₀ Ti ₂₀催化剂上实现了RWGS与链增长的良好匹配催化，实现了高达1282.7的C ₅₊产率${\text{G}}_{\text{燃料}}{\text{公斤}}_{\text{猫}}^{\text{-1}}{\text{H}}^{\text{-1}}$在 CO ₂转化率为 44.9% 并保持相当低的副产物选择性（CO 为 9.6%，CH ₄为 12.8% ）。