Method for preparing nano-palladium catalyst by using protein assembly

The invention relates to a method for preparing a nano-palladium catalyst by utilizing a protein assembly, which is characterized in that the nano-palladium catalyst with controllable particle size and high dispersity is prepared by utilizing a porous protein assembly, taking protein as a reducing agent and taking the pores of the assembly as a reactor. In the prior art, the preparation method of the metal nano-catalyst mainly has the problems that the preparation process is not environment-friendly, the energy consumption is high, the cost is high, the particle size is uncontrollable, the dispersity is poor and the like. The problem can be solved by the method for preparing the nano-palladium catalyst by using the protein assembly. The invention has the main advantages that: 1) the protein assembly has no environmental pollution problem in preparation and reaction processes; 2) the particle size of the nano-palladium is limited by the pore size of the protein assembly, so that the particle size can be contro