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Selective Hydrogenation Of Furfural On Ni−P, Ni−B, And Ni−P−B Ultrafine Materials

Shao-Pai Lee, Y. Chen
Published 1999 · Chemistry

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A series of ultafine Ni−P, Ni−B, and Ni−P−B amorphous alloy catalysts with various atomic ratios were prepared by a chemical reduction method. The catalysts were characterized with respect to elemental analysis, nitrogen sorption, XRD, TEM, XPS, and hydrogenation activity. Conventional Raney nickel was included for comparison. The Ni/P/B molar ratio in the starting material significantly affected the concentration of boron and phosphorus bonded to the nickel metal, subsequently affecting the surface area, the amorphous structure, and the hydrogenation activity and selectivity of the catalyst. The different electron transfer between nickel metal and the metalloid elements in Ni−P and Ni−B powders (phosphorus draws electrons and boron donates electrons) results in the extremely different hydrogenation activity of furfural (specific activity per surface area: Ni85.0P15.0 ≫ Ni71.4B28.9). By regulating a suitable P/B ratio, the ultrafine Ni−P−B catalyst dramatically revealed a markedly higher hydrogenation act...

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