Water electrolysis hydrogen production catalyst and preparation method thereof

The invention belongs to the technical field of water electrolysis hydrogen production and discloses a water electrolysis hydrogen production catalyst and a preparation method thereof. The catalyst has two structures, the first structure is a core-shell structure, the shell is a carbon shell, the carbon shell is doped with nitrogen, the core is a mixture of Fe, Co, Fe3C and Co3C, the second structure is a hollow carbon sphere structure and the carbon shell is doped with nitrogen. The preparation method comprises dissolving cobalt nitrate and sodium citrate in water to obtain a solution A, dissolving potassium ferrocyanide in water to obtain a solution B, fully mixing the solution A and the solution B under stirring, aging the mixture at the room temperature for at least 24h, then separating the precipitates, washing the precipitates with water and ethanol, carrying out drying to obtain a precursor, heating the precursor to 600-750 DEG C in an inert atmosphere, carrying out calcinationfor at least 1h, collecting the calcination product with the first structure, and immersing the calcination product with the first structure through an inorganic acid to obtain the product with the second structure. The catalyst has high activity and stability in water electrolysis hydrogen production.