催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (2): 89-91.

• 研究快讯 • 上一篇    下一篇

硅溶胶负载非晶态NiB纳米团簇的制备与催化加氢性能

闫洪,李伟,张明慧,陶克毅   

  1. 南开大学化学学院新催化材料科学研究所, 天津 300071
  • 收稿日期:2009-02-25 出版日期:2009-02-25 发布日期:2012-11-21

Preparation of Silica Sol-Supported NiB Nanoclusters and Their Catalytic Hydrogenation Performance

YAN Hong, LI Wei*, ZHANG Minghui, TAO Keyi   

  1. Institute of New Catalytic Materials Science, College of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2009-02-25 Online:2009-02-25 Published:2012-11-21

PDF

907

被引次数

27

摘要： 以硅溶胶为载体,通过化学还原法制备了具有超小尺寸的非晶态NiB催化剂. 采用高倍透射电镜、选区电子衍射和能量色散谱对样品的形貌和结构进行了表征. 结果表明,以硅溶胶为载体负载的非晶态NiB催化剂,其活性组分的粒径在1～2 nm, 并且活性组分Ni均匀地分布于硅溶胶载体上. 与传统的Raney Ni催化剂相比, NiB/硅溶胶表现出更为优异的催化加氢性能并极大地提高了氢化效率. 催化剂的优良活性可归因于载体硅溶胶的大表面积及其硅烷醇对活性组分的锚定功能,这使活性组分Ni以超小尺寸均匀地分散于载体上,从而使纳米粒子的表面效应得到充分发挥.

关键词: 硅溶胶, 负载, 非晶态, 镍, 硼, 纳米团簇, 加氢

Abstract: Amorphous NiB supported on silica sol was synthesized by chemical reduction. The size of active Ni was 1-2 nm, and the distribution of the c omponents was regular. NiB/silica sol exhibited a higher hydrogenation activity than commercial Raney Ni.

Key words: silica sol, support, amorphous, nickel, boron, nanocluster, hydrogenation