The invention discloses a high-efficiency porous Ni-Mo
hydrogen evolution
electrode and a preparation method thereof. The preparation method of the high-efficiency porous Ni-Mo
hydrogen evolution
electrode comprises the steps that firstly, an
oxide layer and
grease substances on the surface of a
nickel net or foamed
nickel are removed through mechanical shearing,
degreasing (alkali-washing
degreasing or electrolytic
degreasing), and acid
pickling; secondly, Ni particles, Mo particles and Al particles are evenly mixed according to a certain proportion and then sprayed onto a pretreated conductive substrate in a
plasma spraying way; thirdly, a sprayed
electrode is subjected to alkali washing, so that active Al
metal is removed; and finally, the electrode treated with alkali liquor is placed in a tubular furnace for high-temperature thermal reduction. According to the electrode,
molybdenum nanoparticles are used as a
molybdenum element source to be evenly doped into a catalyst layer, so that a plating structure which is excellent in
hydrogen evolution capacity, provided with the uniform catalyst layer and high in
hydrogen evolution activity is formed. The active Al
metal is removed through alkali washing, so that a porous structure is formed on the surface of the electrode, a reaction
active site is enlarged, and the
hydrogen evolution activity is improved. According to the preparation method of the high-efficiency porous Ni-Mo
hydrogen evolution electrode, operation is simple, the production cost is low, and the catalyst layer is firm in structure. The hydrogen evolution catalytic
active electrode prepared through the method can be widely applied to the
alkaline water electrolysis industry.