Ternary composite material having NiO nanosheet/bimetallic CeCuOx microsheet core-shell structure, and preparation and application thereof

A method of preparing a ternary NiO sheet and bimetallic CeCuOX sheet core-shell structure composite material, comprising the following steps:

• (1) mixing a cerium salt, a copper salt, an organic acid, and a solvent, performing a solvothermal reaction, and calcining a reaction product of the solvothermal reaction to obtain a CeCuOX sheet;
• (2) performing a water bath reaction of a mixture of a nickel salt, urea, and the CeCuOX sheet in an alcohol/water mixed solvent, and calcining a reaction product of the water bath reaction to obtain the ternary NiO sheet and bimetallic CeCuOX sheet core-shell structure composite material,
• wherein in step (1), a reaction temperature of the solvothermal reaction is 80° C.-90° C. and a reaction time is 24-25 hours;
• the calcination is performed in air, a calcination temperature is 350° C.-400° C., and a calcination time is 4-4.5 hours.