Method for preparing monodisperse silver core-nickel shell nanoparticles

The invention relates to metal nanoparticles of a core-shell structure and provides a method for preparing monodisperse silver core-nickel shell nanoparticles and application of monodisperse silver core-nickel shell nanoparticles to catalysis of sodium borohydride for hydrolysis hydrogen production, wherein the method has a simple process and can ensure the monodispersity of products. The method comprises the steps of: adding a mixed solution of metal salt of nickel, metal salt of silver, a surface stabilizing agent, alkylamine or alkylamine and a high-boiling-point organic solvent into a reaction vessel under the protection of inert gas, homogenizing the mixture, heating to 170-240 DEG C and preserving the temperature for 20min-3h to obtain a reaction product; and cleaning the obtained reaction product with an organic solvent mixed solution, centrifuging for separation, and vacuum-drying to obtain the monodisperse silver core-nickel shell nanoparticles. The monodisperse silver core-nickel shell nanoparticles can be applied to catalysis of the sodium borohydride for hydrolysis hydrogen production. The method has the advantages of simple preparation process, relatively low cost and convenience for industrial production.