Process for producing nano-Ni/Fe bimetallic material

The invention provides a method for preparing nano-sized Ni/Fe duplex metal, which comprises the following steps: firstly, preparation of iron nanoparticles: adding an ethanol aqueous solution of water-soluble Fe salts in a container, adding an aqueous solution of NaBH4 into the container under stirring in the presence of nitrogen gas to obtain black iron nanoparticles, and washing with diluted HCl and deoxygenated and deionized water for 3 to 5 times in the presence of nitrogen gas; then, soaking the iron nanoparticles in an ethanol aqueous solution of water-soluble Ni salts, and washing the resulting particles with anhydrous alcohol for 3 to 5 times; and finally, filtering and oven-drying to obtain the final product of nano-sized Ni/Fe duplex metal.