中华医学超声杂志

应用化学 ›› 1997, Vol. 0 ›› Issue (1): 49-52.

• 研究论文 • 上一篇    下一篇

CuO/CeO2和CuO/Al2O3催化剂的催化性能

钟依均1, 陈平2, 周碧2, 罗孟飞2   

  1. 1. 浙江师范大学化学系 金华 321004;
    2. 杭州大学催化研究所 杭州
  • 收稿日期:1996-03-07 修回日期:1996-07-09 出版日期:1997-02-10 发布日期:1997-02-10
  • 基金资助:
    浙江省应用化学重点实验室资助

Catalytic Properties of CuO/CeO2 and CuO/Al2O3 Catalysts

Zhong Yijun1, Chen Ping2, Zhou Bi2, Luo Mengfei2   

  1. 1. Department of Chemistry, Zhejiang Normal University, Jinhua 321004;
    2. Institute of Catalysis, Hangzhou University, Hangzhou
  • Received:1996-03-07 Revised:1996-07-09 Published:1997-02-10 Online:1997-02-10

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摘要： 本文以CO氧化为模式反应考察了CeO2和Al2O3负载氧化铜催化剂的氧化活性,运用XRD和TPR技术研究了催化剂的还原性能和物相结构,结果表明:载体性质对负载CuO催化剂的CO氧化活性有很大影响,CuO/CeO2催化剂活性明显高于CuO/Al2O3催化剂。催化剂的还原特性随载体不同而不同。同时发现,热处理对催化剂铜物种的存在形式,晶粒大小、还原特性及其催化活性有明显影响,CuO/Al2O3催化剂活性下降的主要因素是生成了活性较低的CuAl2O4相,而CuO/CeO2催化剂活性下降是由于CuO和CeO2发生烧结,晶粒变大

关键词: CuO/CeO2, CuO/Al2O3, 催化剂, 还原特性, 氧化活性

Abstract: The oxidation activity of CuO supported on CeO2 and Al2O3 was investigated using the oxidation of carbon monoxide as a model reaction. The reducibility and Cu oxide species of the catalysts were studied by XRD and TPR techniques. The susceptibility of COto oxidation strongly depends on the support: the catalytic activity of CuO/CeO2 is much higher than that of CuO/Al2O3. It is found that the existing forms of copper species, crystal particle size of CuO, the reducibility and activity of catalysts are affected by thermal treatment. The formation of CuAl2O4 spinal species at high temperature is the main reason for activity decrease of CuO/Al2O3 catalyst, and the increase of crystal particle size of CuOis the main reason for activity decrease of CuO/CeO2.

Key words: CuO/CeO2, CuO/Al2O3, catalyst, reducibility, oxidation activity

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