Method for laser micro cladding preparation of hydrogen storage layer of hydrogen evolution electrode

The invention discloses a method for laser micro cladding preparation of a hydrogen storage layer of a hydrogen evolution electrode. The method comprises that a mixed rare earth hydrogen storage alloy powder is micro-cladded on a nickel substrate via laser to prepare the hydrogen storage layer; the mixed rare earth hydrogen storage alloy powder includes MmNi[5-x](Co, Mn, Al)[x], wherein Mm represents one or more of La, Ce, Pr or Nd, and x is 0-1.2. Compared with the prior art, the prepared hydrogen storage layer has the advantages of dense microstructure, refined grains, firm binding force with the nickel substrate, and small contact resistance, has a hole structure, and allows the hydrogen storage performance to be improved substantially. In intermittent electrolytic conditions, the hydrogen evolution electrode including the prepared hydrogen storage layer not only has relatively high electrocatalytic activity of hydrogen evolution reaction and the electrochemical stability of continuous electrolysis, but also has relatively strong countercurrent resistant performance. The method is simple in preparation technology, prone to realization of automation, less in material loss, and strong in economic feasibility, and has quite good market application prospects.