PREPARATION OF PtCu NPs/2D-TiO2 CATALYST AND ITS CATALYTIC PERFORMANCE FOR HYDROGENATION OF NITROBENZENE
A platinum-copper alloy nanoparticle-supported titanium dioxide catalyst(PtCu NPs/2D-TiO2)was prepared using the synthesized dendritic platinum-copper alloy nanoparticles(PtCu NPs)and two-dimensional graphene-like titanium dioxide(2D-TiO2)as precursors.The successful prepara tion of PtCu NPs and 2D-TiO2 were confirmed by characterization methods such as X-ray diffraction(XRD)and transmission electron microscopy(TEM),and it was found that PtCu NPs with an aver-age particle size of about 80 nm were uniformly loaded on the 2D-TiO2 support.The hydrogenation performance of PtCu NPs/2D-TiO2 was investigated through the hydrogenation experiment of nitro-benzene.The resutt shows that when w(loading amount of PtCu NPs)=10％and the reaction tem-perature was 40℃,the conversion rate of nitrobenzene hydrogenation was 80.9％,the selectivity of the target product aniline was 76.9％.Moreover,the catalyst could still maintain the conversion rate of nitrobenzene hydrogenation and the selectivity of aniline at 77.9％and 74％,respectively,after be-ing recycled and reused 5 times.
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