Catalyst used for preparation of hydrogen through water electrolysis, and preparation method thereof

The invention provides a catalyst used for the preparation of hydrogen through water electrolysis. The catalyst is amorphous Ni-B, and an atom ratio of Ni to B is 1.0-5.0. The invention also provides a preparation method for the catalyst. The method is characterized in that Ni-B is loaded on the surface of a carrier through a chemical plating method, and the feeding atom ratio of B to Ni in a chemical plating liquid is 3.0-10.0. The amorphous Ni-B is successfully applied in the catalysis of a hydrogen evolution reaction through water decomposition, and the reaction activity of the amorphous Ni-B can be comparable with that of platinum. The amorphous Ni-B has the advantages of low hydrogen evolution over-potential, high catalytic efficiency, stable performances, low price and simple preparation, and becomes one of the most ideal catalysts for substituting the present noble metal Pt catalyst.