Cu/ZrO2 catalytic agent, preparation method of Cu/ZrO2 catalytic agent and application of Cu/ZrO2 catalytic agent

The invention discloses a Cu/ZrO2 catalytic agent, a preparation method of the Cu/ZrO2 catalytic agent and application of the Cu/ZrO2 catalytic agent. The Cu/ZrO2 catalytic agent is composed of reduction state copper and reduction state, and Cu:ZrO2 is 1:9 after calculating according to the molar ratio. The preparation method comprises using a sodium hydroxide aqueous solution, ZrOCl2-8H2O and Cu(NO3)2-3H2O to generate H2O, then adding reducing agent glucose, conducting a hydrothermal reaction, cooling after the hydrothermal reaction until reaction liquid is at the room temperature for filtering, using absolute ethyl alcohol and distilled water to sequentially wash and filter obtained filtering cakes, and conducting vacuum drying after no Cl- is detected in the filter liquor, namely the Cu/ZrO2 catalytic agent. The Cu/ZrO2 catalytic agent is used for a process that hydrogen is added in catalysis CO2 to prepare methane, and vapor phase reduction pre-treatment is not needed, so that production efficiency for th