Preparation and Characterization of Highly Selective Fe-Cu/Sio2Catalysts for Partial Hydrogenation of Alkynes

摘要: Summary A highly selective Fe-Cu/SiO 2 catalyst with an enhanced activity for partial hydrogenation of phenylacetylene was prepared by coprecipitation iron and copper sulfates over ultrafine silica gel excess amount sodium carbonate at a low temperature. The effects the precipitation variables doping sulfate ions on reduction behavior, surface states, catalytic properties precursors and/or reduced catalysts were studied using TGA, XRD, XPS. presence lowers decomposition temperatures α-FeOOH to α-Fe O 3 Fe 2+ , thus decreasing water produced higher preventing sintering metal. temperature use metal are both effective provide highly-dispersed species in precursor, which result increase dispersion catalyst.