2results about How to "Improve hydrogen evolution activity" patented technology

The application discloses a preparation method of a hydrogen electrode for water electrolysis of a nickel-molybdenum alloy, and belongs to the technical field of hydrogen energy and green hydrogen preparation. The method comprises the following steps: (1) smelting elemental nickel and elemental molybdenum to prepare a nickel-molybdenum alloy powder; (2) mixing the nickel-molybdenum alloy powder with aluminum powder and then spraying the mixture on the surface of a substrate; (3) performing heat treatment on the sprayed substrate; and (4) performing alkali leaching pore forming treatment. The application introduces the element molybdenum to form a nickel-molybdenum alloy, utilizes the difference in electronegativity between nickel and molybdenum to regulate the electronic structure of the catalyst surface, and significantly improves the hydrogen evolution reaction activity; meanwhile, the alloying and then powdering process is adopted to ensure the uniformity of the element distribution and to enhance the stability and reverse current resistance of the electrode. The electrode prepared by the application has a porous structure, high activity and long service life, and is suitable for the field of alkaline water electrolysis hydrogen production.

The invention relates to a high-stability transition metal phosphide hydrogen evolution catalyst. The catalyst is composed of a phosphide active phase and a bifunctional metal phosphorus oxide protective layer. The invention also relates to a preparation method of the high-stability transition metal phosphide hydrogen evolution catalyst, which comprises the following steps: firstly, loading a metal precursor on foamed nickel, and phosphating to obtain a phosphide catalyst; and then carrying out catalyst surface treatment to obtain the phosphide hydrogen evolution catalyst with a phosphorus oxide protective layer. The protective layer on the surface of the phosphide catalyst is a dual-function protective layer capable of improving activity and stability at the same time, the protective layer with controllable thickness and uniformity can be obtained through regulation and control of surface treatment conditions in the preparation process, the preparation process is simple, the cost is low, and the phosphide catalyst has important industrial application value.