Nickel-iron hydroxyl compound nanosheet array electrode and preparation method and application thereof

The invention discloses a nickel-iron hydroxyl compound nanosheet array electrode as well as a preparation method and application thereof, and belongs to the technical field of water electrolysis hydrogen production. The nickel-iron hydroxyl compound nanosheet array electrode comprises mixed crystals of nickel hydroxide and iron oxyhydroxide, wherein the molar ratio of the content of nickel to the content of iron to the content of oxygen is (3-7): (1-2): (3-8). The prepared anode material is of an ordered nanosheet array structure, is high in porosity and large in specific surface area, facilitates exposure of active sites, permeation of electrolyte and overflow of gas products, promotes mass transfer/charge transfer power and improves the current density. The anode material contains high-activity nickel-iron-based catalytic species, and in-situ rooting growth ensures combination and conductivity between the substrate and the catalyst, so that the ohmic loss is reduced, and the overpotential loss is also redu