Controlled Synthesis of Supported Nickel Boride Catalyst Using Electroless Plating
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Abstract
The supported nickel boride (Ni−B/MgO) catalysts have been synthesized using electroless plating method. The effects of reaction parameters including the molar ratios of the starting materials, pH value of the plating solution, and the additives have been systematically studied. The catalysts have been characterized by various techniques such as inductively coupled plasma atomic emission spectrometry, high-resolution transmission electron microscopy, scanning electron microscopy, and chemisorption of hydrogen. The hydrogenating properties were evaluated using the liquid-phase hydrogenation of sulfolene and acetophenone. We found that (1) the size, compositions, and load of porous Ni−B nanoparticles depended on the starting ratio of ethylenediamine/Ni2+ and pH value; (2) the addition of stabilizer to plating solution resulted in changing from a porous Ni−B particle to a solid one, (3) the surface properties of supported Ni−B catalysts depended on their sizes, loading, and compositions, and (4) the hydrogenation activity depended on the surface concentrations of nickel.
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