This work analyses the catalytic activity displayed by Cu/SiO₂, Cu-Fe/SiO₂ and Cu/FSN (Fe-SiO₂ nanocomposite) catalysts for the Reverse Water Gas Shift reaction. Compared to Cu/SiO₂ catalyst, the presence of Fe resulted on higher CO’s selectivity and boosted resistances against the constitution of the deactivation carbonaceous species. Regarding the catalytic performance however, the extent of improvement attained through incorporation Fe species strongly relied on the catalysts’ configuration. At 30 L/gh and H₂:CO₂ ratios = 3, the performance of the catalysts’ series increased according to the sequence: Cu/SiO₂ < Cu-Fe/SiO₂ << Cu/FSN. The remarkable catalytic enhancements provided by Fe-SiO₂ nanocomposites under different RWGS reaction atmospheres were associated to enhanced catalyst surface basicity’s and stronger Cu-support interactions. The catalytic promotion achieved by Fe-SiO₂ nanocomposites argue an optimistic prospective for nanocomposite catalysts within future CO₂-valorising technologies.

这项工作分析了Cu / SiO ₂，Cu-Fe / SiO ₂和Cu / FSN（Fe-SiO ₂纳米复合材料）催化剂对水煤气逆反应的催化活性。与Cu / SiO ₂催化剂相比，Fe的存在导致更高的CO选择性并增强了对失活碳质物种构成的抵抗力。然而，关于催化性能，通过掺入Fe物质达到的改进程度强烈依赖于催化剂的构型。在30 L / gh和H ₂：CO ₂比= 3时，催化剂系列的性能根据以下顺序提高：Cu / SiO ₂ <Cu-Fe / SiO ₂<<铜/ FSN。Fe-SiO ₂纳米复合材料在不同RWGS反应气氛下提供的显着催化增强作用与增强的催化剂表面碱度和更强的Cu-载体相互作用有关。Fe-SiO ₂纳米复合材料实现的催化促进作用表明，在未来的CO ₂增值技术中，纳米复合催化剂具有乐观的前景。