NI-HYBRIDIZED NANO-STRUCTURED COMPOSITE CATALYST, PREPARATION METHOD THEREFOR AND USE THEREOF

摘要

Disclosed are an Ni-hybridized nano-structured composite catalyst, a preparation method therefor and a use thereof. The preparation method comprises: step 1): dissolving a metal salt in water, mixing the solution with molecular sieve, evaporating the resulting product to dryness, drying, calcinating to obtain a composite support modified by a metal oxide semiconductor; and step 2): dispersing the composite support in a nickel-containing solution, stirring until uniform, adding an alkali and hydrazine hydrate, heating the mixed solution in a sealed vessel to perform a liquid phase reduction reaction, and performing solid-liquid separation, impurity removal by washing, and drying on the resulting reaction so as to obtain the target product. The catalyst provided in the present invention has the advantages of having a high selectivity, high conversion rate and mild reaction conditions in selective hydrogenation, and is particularly suitable for use in the reaction process of selective hydrogenation of styrene.