物理化学学报 >> 1998, Vol. 14 >> Issue (03): 249-253.doi: 10.3866/PKU.WHXB19980311

研究论文 上一篇    下一篇

SMAI法制备的Cu催化剂的CO加氢催化

吴世华, 朱常英, 黄唯平, 吴文艳   

  1. 南开大学化学系，天津 300071|天津建材建设公司分析室，天津 300381
  • 收稿日期:1997-06-30 修回日期:1997-10-31 发布日期:1998-03-15
  • 通讯作者: 吴世华

Studies on the Catalytic Properties for CO Hydrogenation of Supported Cu Catalysts Prepared by SMAI Method

Wu Shi-Hua, Zhu Chang-Ying, Huang Wei-Ping, Wu Wen-Yan   

  1. Department of Chemistry,Nankai University,Tianjin 300071|Analytical Laboratory of Tianjin Construction Material Company,Tianjin 300381
  • Received:1997-06-30 Revised:1997-10-31 Published:1998-03-15
  • Contact: Wu Shi-Hua

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摘要：

用溶剂化金属原子浸渍（SMAI）法制备了SiO2、Cr2O3负载Cu催化剂. XPS测定表明三种载体上的Cu几乎全部以零价态存在．X射线增宽法测定表明随着Cu含量增加Cu颗粒增大．Cu催化剂在CO加氢中的催化活性与载体、Cu颗粒大小和Cu价态有关．Cr2O3对Cu催化活性有促进效应．Cr2O3负载Cu催化剂活性随Cu颗粒减小而增大，而SiO2作载体时，颗粒大小对活性无影响，零价Cu0为催化活性中心.

关键词: 溶剂化金属原子, Cu催化剂, CO加氢

Abstract:

 SiO2 and Cr2O3 supported Cu catalysts were prepared by Solvated Metal Atom Impregnation (SMAI) method. XPS measurement showed that Cu on both supports almost totally exists in zero valent state- X-ray broadening measurement showed that the Cu particle sizes in-creased as the Cu content increased. The catalytic activity for CO hydrogenation of Cu catalysts were related to the supported Cu particle sizes and Cu valent states. Cr2O3 had promotion effect on Cu catalytic activity. The catalytic activity of Cu catalyst supported on Cr2O3 decreased as Cu partical size increased, while witll SiO2 as support, Cu particle size had no effect on the activity. Zero valent Cu0 was the active center for CO hydrogenation.

Key words: Solvated metal atom, Cu catalyst, CO hydrogenation