Copper-indium alloy catalyst, preparation method thereof and application of copper-indium alloy catalyst in driving CO2 electrocatalytic reduction to prepare H2/CO synthesis gas

The invention relates to a copper-indium alloy catalyst, a preparation method thereof and application of the copper-indium alloy catalyst in driving CO2 electrocatalytic reduction to prepare H2/CO synthesis gas. The invention belongs to the field of H2/CO synthesis gas preparation. The invention aims to solve the technical problem that the existing technology for preparing H2/CO synthesis gas through CO2 electro-catalysis is limited by the selectivity of CO2 reduction products. The copper-indium alloy catalyst is prepared through a sodium borohydride assisted reduction method, the reduction performance of the catalyst is regulated and controlled through an alloy structure and a crystal face, meanwhile, phosphorus vanadium is adopted to replace quaternary heteropoly acid to serve as an electrolyte to promote transfer of electrons and protons in the CO2 reduction process, and therefore an ECO2RR reduction system is developed; reduction products are researched by applying electrolytic voltage to the system, and