Vanadium-nickel-magnesium three-way catalyst as well as preparation method and application thereof

The invention discloses a vanadium-nickel-magnesium three-way catalyst and a preparation method and application thereof.The catalyst is prepared from 50-70 parts of aluminum-nickel alloy, 10-20 parts of vanadium oxide, 20-30 parts of talcum powder, 80-120 parts of 30% sodium hydroxide solution and 150-300 parts of distilled water, the raw materials of the aluminum-nickel alloy, the talcum powder and the vanadium oxide are added into the sodium hydroxide solution to be mixed into slurry, and the slurry is prepared; after the heat preservation reaction, the filter cake is washed with water, dried and roasted to obtain the vanadium-nickel-magnesium three-way catalyst. The preparation method is simple and easy to operate and control; the invention also discloses application of the catalyst in preparation of N-ethylaniline, ethanol, aniline and the catalyst are added into a reaction kettle, reaction is performed at normal temperature and normal pressure, the reaction is mild, the requirement on equipment is low, t