高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (1): 123.

• 论文 • 上一篇    下一篇

Co/ZrO2催化剂的结构及TPR性能研究

俞铁铭, 周仁贤, 唐中民, 郑小明   

  1. 浙江大学催化研究所, 杭州 310028
  • 收稿日期:1998-03-11 出版日期:1999-01-24 发布日期:1999-01-24
  • 基金资助:

    浙江省教育委员会基金

Studies of the Structures and TPR Properties of Co/ZrO2Catalyst

YU Tie-Ming, ZHOU Ren-Xian, TANG Zhong-Min, ZHENG Xiao-Ming   

  1. Institute of Catalysis, Zhejiang University, Hangzhou, 310028
  • Received:1998-03-11 Online:1999-01-24 Published:1999-01-24

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摘要： 采用XRD和TPR技术研究了CoZrO体系催化剂的物相结构及还原性能,并以CO氧化反应为探针考察了催化剂的氧化活性.结果表明,钴的存在会阻止tZrO2→混合相→mZrO2的转变和ZrO2颗粒的增长;高温焙烧后,部分钴氧化物与载体ZrO2形成固溶体.Co/ZrO2催化剂中的钴以Co3O4的形式存在,钴锆之间的相互作用有利于钴的分散.随着Co负载量增加,催化剂的CO氧化活性提高.

关键词: Co/ZrO2催化剂, 结构, CO氧化, 程序升温还原

Abstract: Co/ZrO2catalysts were prepared by impregnation met hod.Their structures and TPR properties were st udied by XRD, TPR, and COoxidation as a probe reaction.The results showed that There was a strong interaction between Co and ZrO2, which rest rained The growth of fine par-ticles of zirconium oxide and The phase transformation of t-ZrO2to m-ZrO2By calcination at ahigh temperat ure, partof The cobaltoxide formed a solid solution with zirconium oxide.The formof cobaltoxide is Co3O4for Co/ZrO2catalyst.In addition, The interaction between Co and ZrO2raised The dispersion of cobaltoxide on ZrO2The activity of CO oxidation increased with The in-creasing of Coloading.

Key words: Co/ZrO2catalyst, Structure, CO oxidation, TPR

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