Comparative Study on Catalytic Performances for Low-temperature CO Oxidation of Cu鈥揅e鈥揙 and Cu鈥揅o鈥揅e鈥揙 Catalysts

详细信息

下载全文

推荐本文 |

• 作者：Yan Su ; Shuping Wang ; Tongying Zhang ; Shurong Wang ; Baolin Zhu ; Jianliang Cao ; Zhongyong Yuan ; Shoumin Zhang ; Weiping Huang and Shihua Wu
• 关键词：Comparative study ; Cu&#8211 ; Ce&#8211 ; O ; Cu&#8211 ; Co&#8211 ; Ce&#8211 ; O ; Low ; temperature CO oxidation
• 刊名：Catalysis Letters
• 出版时间：August, 2008
• 出版年：2008
• 期刊代码：13_1011372X
• 类别：ch
• 卷：124
• 期：3-4
• 页码：405-412
• 数据来源：sp

摘要

Two series of Cu–Ce–O and Cu–Co–Ce–O catalysts were prepared by co-precipitation method. The prepared catalysts were characterized by XRD, IR, TPR, XPS, BET and ICP-AES. The catalytic activities of the catalysts for low-temperature CO oxidation were evaluated through a microreactor-GC system. TPR results indicate that the addition of cobalt to the Cu–Ce–O can increase the dispersion of copper oxide, and the interaction between cobalt and copper can enhance the reducibility of each other. XPS analysis show that Ce4+, Cu2+, along with Co₃O₄, are present on the surface of Cu_0.4Co_0.6Ce₄ catalyst. The Co/Cu atomic ratio and the calcination temperature have significant effect on the activities of the catalysts. Compared with Cu₁Ce₄ catalyst, the Cu_0.4Co_0.6Ce₄ catalyst has better activity and thermal stability.