Preparation method and application of reverse water gas shift reaction catalyst

The invention discloses a preparation method and application of a reverse water-gas shift reaction catalyst, La and Ru are sequentially loaded on the surface of SBA-15 by adopting a step-by-step impregnation method to obtain a loaded ruthenium-lanthanum bimetallic catalyst, and through the synergistic effect of Ru and La, the phenomenon of serious agglomeration of Ru is effectively inhibited; when the supported ruthenium-lanthanum bimetallic catalyst is used for thermocatalyzing CO2 hydrogenation reaction to prepare CO, the prepared reverse water-gas shift reaction catalyst can be efficiently utilized to convert CO2 into CO, the CO2 conversion rate is increased, and the cost is saved. 本发明公开了一种逆水煤气变换反应催化剂的制备方法及应用，通过采用分步浸渍法先后将La与Ru负载于SBA-15表面得到负载型钌镧双金属催化剂，通过Ru和La的协同作用，有效抑制了Ru发生严重团聚的现象；使用该负载型钌镧双金属催化剂热催化CO2加氢反应制CO，能够高效利用所制备的逆水煤气变换反应催化剂将CO2转化为CO，提高CO2转化率，节约成本。