Reverse water gas shift catalyst as well as preparation method and application thereof

The invention discloses a reverse water gas shift catalyst and a preparation method and application thereof, the catalyst is a confined nickel phosphide catalyst NixPy-A, NixPy is nickel phosphide, and A is a mesoporous silica carrier; the preparation method of the catalyst comprises the following steps: dissolving H3PO4 and Ni (NO3) 2.6 H2O in pure water, and adding the aqueous solution into n-hexane containing the carrier A; then, sealing and uniformly stirring the mixed solution, then releasing the sealing condition and continuously stirring until the n-hexane is completely volatilized; and finally, carrying out programmed heating reduction on the remaining material after volatilization to obtain the reverse water gas shift catalyst NixPy-A, the prepared catalyst is used for preparing CO through selective hydrogenation of thermocatalytic CO2, greenhouse gas CO2 can be treated, synthesis gas with high industrial value can be produced, and good environmental benefits and economic benefits ...