纳米非晶态Ni-B合金催化剂的室温固相合成及催化氢化活性

Solid-phase Synthesis at Room Temperature and Catalytic Activity for Hydrogenation of Nanosized Ni-B Amorphous Alloy

以NiCl2·6H1O与KBH4为原料，采用室温固相合成法，制备非晶态纳米Ni—B合金催化荆，用化学分析、XRD、TEM技术对其组成、结构和形貌进行表征．确定了制备非晶态Ni—B合金催化荆的最佳条件：在室温、无氧条件下，硼镍摩尔比为2：1，制备的Ni—B催化剂粒径最小，达到50～60nm，纯度较高．组成为Ni2、27B的催化剂对脂肪酸甲酯加氢的催化活性好，脂肪酸甲酯的转化率达到89．85％．

The nano-sized Ni-B amorphous alloy catalysts were synthesized with NiC12. 6H2O and KBH4 powder by solid phase reaction at room temperature. The composition, structure and morphology of catalyst were investigated by chemical analysis, XRD and TEM techniques. The optimum synthesis conditions were determined as that B/Ni mole ratio is 2 without oxygen at room temperature. The size of nanoparticles synthesized under the optimum conditions is smaller, with the diameter of 50 - 60 nm. The experimental results showed that catalysts had a high catalytic activity for hydrogenation of fatty acid methyl esters with the conversion rate reaching 89.85%.