The metal is deposited on the porous body by electrochemical method, and the deposited components are joined together by sintering, and the strength reaches the required high-porosity metal foam, which has a high porosity and can be filled with more materials, such as catalysts. , electrolyte, etc. 
3. Through-hole copper foam is prepared by sintering-desolvation process, and the electrolytic copper powder, NaCl particles and additives are mixed uniformly and pressed into green compacts.  The sintering furnace is placed in an argon atmosphere for sintering, and the obtained product is placed in circulating hot water. Dissolved in the device, then washed with ultrasonic water bath and acetone, and finally dried to form open pores, which are composed of a three-way connected space network, with a porosity of 50-81%, an average pore diameter of 0.2-4 mm, and a pore distribution.