Nickel-based efficient ammonia decomposition catalyst and preparation method thereof

The invention discloses a nickel-based efficient ammonia decomposition catalyst and a preparation method thereof, and relates to the technical field of ammonia decomposition hydrogen production catalysts, and the preparation method of the catalyst comprises the following steps: 1) synthesizing ZIF-8 or ZIF-67 from 2-methylimidazole and metal nitrate through a room temperature crystallization method; 2) dissolving a nickel salt in methanol to prepare an impregnation liquid, and carrying out impregnation treatment on ZIF-8 or ZIF-67; (3) taking the impregnated ZIF-8 or ZIF-67 as a seed crystal, and preparing a ZIF-8 or ZIF-67 core-shell structure catalyst precursor coated with MOF-74 by using a solvothermal method; 4) tabletting and molding the core-shell structure catalyst precursor, and then roasting; and 5) reducing the roasted catalyst precursor in a reducing atmosphere to obtain the catalyst. The catalyst prepared by the method has very high active metal Ni dispersity, exposes more alkaline sites, remarkab