催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (11): 1089-1092.

• 研究论文 • 上一篇    下一篇

氧化铈形貌对Au/CeO2催化剂催化氧化CO反应活性的影响

贾昆明, 张慧丽, 李文翠   

  1. 大连理工大学化工学院, 辽宁大连 116012
  • 收稿日期:2008-11-25 出版日期:2008-11-25 发布日期:2012-08-17

Effect of the Morphology of the Ceria Support on the Activity of Au/CeO2 Catalysts for CO Oxidation

JIA Kunming, ZHANG Huili, LI Wencui*   

  1. School of Chemical Engineering, Dalian University of Technology, Dalian 116012, Liaoning, China
  • Received:2008-11-25 Online:2008-11-25 Published:2012-08-17

PDF

1125

被引次数

25

摘要： 采用水热合成法制备了形貌规则的纳米氧化铈颗粒,分别为棒状、立方体和多面体,通过溶胶沉积法将金颗粒沉积到不同形貌氧化铈表面制得了Au/CeO2催化剂. 考察了催化剂载体的不同形貌对CO催化氧化反应活性的影响. 实验结果表明,棒状(110+100)和多面体(111+100)氧化铈作为载体时的催化剂活性比立方体(100)作为载体时的活性高. 在低温段,多面体氧化铈作为载体的催化剂表现出较高活性,而在高温范围,棒状氧化铈作为载体的催化剂的催化活性最好.

关键词: 金, 一氧化碳氧化, 氧化铈, 晶面

Abstract: Ceria with different morphology was prepared by a hydrothermal method. The coll oidal deposition method selected to prepare the catalysts allowed the isolation of the support effect on the catalytic activity and excluded the influence of go ld particle formation by their deposition on the support. The activity of the Au /CeO2 catalysts for CO oxidation was investigated.

Key words: gold, carbon monoxide oxidation, ceria, crystal plane