A comparative study was carried out on the CO₂ hydrogenation activities and product selectivities of the titania-supported monometallic and bimetallic Fe-based catalysts prepared by one-step wet impregnation. Among the monometallic catalysts (Fe, Co and Cu/TiO₂), only Fe/TiO₂ catalyst exhibited some selectivity to higher hydrocarbons, while Co/TiO₂ and Cu/TiO₂ were highly selective only to CH₄ and CO, respectively. The addition of a small amount of second metal (Co and Cu) on Fe showed the synergetic promotion on the CO₂ conversion and the space-time yields (STY) of hydrocarbon products. The incorporation of K and La as promoters can further improve the activity and product selectivity to higher hydrocarbons, indicating that the promoted Fe-based bimetallic catalysts are promising for CO₂ hydrogenation to higher hydrocarbons.

对通过一步湿法浸渍法制备的二氧化钛负载的单金属和双金属铁基催化剂的CO ₂氢化活性和产物选择性进行了比较研究。在单金属催化剂（Fe，Co和Cu / TiO ₂）中，只有Fe / TiO ₂催化剂对高级烃具有一定的选择性，而Co / TiO ₂和Cu / TiO ₂分别仅对CH ₄和CO具有高选择性。在Fe上添加少量的第二种金属（Co和Cu）显示出对CO ₂的协同促进作用烃产品的转化率和时空产率（STY）。引入K和La作为促进剂可以进一步提高对高级烃的活性和产物选择性，这表明促进的铁基双金属催化剂有望将CO ₂加氢为高级烃。