Nickel nanoparticles supported on boehmite were prepared by a modified electroless nickel-plating method and a direct reduction method. We mainly studied the catalyst synthesized by the direct reduction method. The as-prepared nickel catalyst was characterized by X-ray diffraction and high-resolution transmission electron microscopy. The catalytic behavior in selective hydrogenation of p-nitrophenol to p-aminophenol and p-chloronitrobenzene to p-chloroaniline was studied and compared with Ni-B/c-Al 2 O 3 catalyst prepared by incipient-wetness impregnation and Ni-B/Al 2 O 3 ÁxH 2 O catalyst synthesized by a coprecipitation method. The Ni-B/boehmite catalysts were found to be more reactive than the Ni-B/c-Al 2 O 3 and Ni-B/Al 2 O 3 ÁxH 2 O catalysts. The superior activity of the Ni-B/boehmite catalyst was attributed to the small Ni-B particles and large amount of structural water, which enhanced the hydrophilicity of the catalyst.

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Cobalt Ferrite (CoFe 2 O 4 ) nanorods and nanorings have been successfully controllable synthesized by solvothermal method. The specific characteristics were confirmed by X-ray diffraction studies (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The measurement of their electrochemical properties as supercapacitor electrode materials indicate different morphological characterizations have various capacitive effects, and CoFe 2 O 4 nanorings generally have larger specific capacitances than nanorods at different scan rates and current densities in 1.0 M KOH solution.