Preparation method and application of tungsten nanocluster modified cobalt electrocatalyst

The invention relates to the technical field of electrocatalysis, and discloses a preparation method and application of a tungsten nanocluster modified cobalt electrocatalyst, and the preparation method comprises the following steps: (1) dissolving cobalt salt in a solvent to obtain a cobalt salt solution; (2) dissolving tungsten salt in the cobalt salt solution to obtain a cobalt-tungsten mixed solution; and (3) adding a strong reducing agent into the cobalt-tungsten mixed solution, separating out a precipitate, separating the precipitate, washing, and drying to obtain the tungsten nanocluster modified cobalt electrocatalyst. The tungsten nanocluster is modified on the cobalt active site to form an electro-catalysis surface interface with a controllable electronic structure, so that the problems of low ammonia yield, poor stability, serious competitive hydrogen evolution reaction and the like in the existing process of synthesizing ammonia by electro-catalysis nitrate radical reduction are solved, and the me