PREPARATION METHOD FOR NANO-NICKEL-BASED CATALYST WITH CONFINEMENT STRUCTURE AND HEXAHEDRAL MORPHOLOGY, AND APPLICATION THEREOF FOR CATALYTIC HYDROGENATION

摘要

A preparation method for a nano-nickel-based catalyst with a confinement structure and hexahedral morphology. According to the method, a nickel-aluminum hydrotalcite precursor of an organic carbon chain intercalation is synthesized first, and the explosive in-situ uniform reduction of an organic carbon source is utilized to prepare a nickel-based catalyst with a confinement structure. The catalyst is structurally characterized in that metal nickel nanoparticles with high crystallinity, small size and hexagonal morphology are confined to Ni(Al)Ox/C. The metal nickel nanoparticles with small size and hexagonal morphology are confined to a matrix carrier to expose more active sites; the catalyst is used in the catalytic hydrogenation reaction of p-nitrophenol, so that the conversion rate and stability of the catalyst can be effectively improved; the catalyst can also be used for selective phenylacetylene hydrogenation and furfural hydrogenation reactions.