| Co/ZrO2催化剂的结构及TPR性能研究 |
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| 引用本文： | 俞铁铭,周仁贤,唐中民,郑小明. Co/ZrO2催化剂的结构及TPR性能研究[J]. 高等学校化学学报, 1999, 20(1): 123-126 |
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| 作者姓名： | 俞铁铭 周仁贤 唐中民 郑小明 |
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| 作者单位： | 浙江大学催化研究所, 杭州 310028 |
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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.
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| 关 键 词： | Co/ZrO2催化剂 结构 CO氧化 程序升温还原 |
| 收稿时间： | 1998-03-11 |
Studies of the Structures and TPR Properties of Co/ZrO2Catalyst |
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| YU Tie-Ming,ZHOU Ren-Xian,TANG Zhong-Min,ZHENG Xiao-Ming. Studies of the Structures and TPR Properties of Co/ZrO2Catalyst[J]. Chemical Research In Chinese Universities, 1999, 20(1): 123-126 |
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| Authors: | YU Tie-Ming ZHOU Ren-Xian TANG Zhong-Min ZHENG Xiao-Ming |
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| Affiliation: | Institute of Catalysis, Zhejiang University, Hangzhou, 310028 |
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| 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. |
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| Keywords: | Co/ZrO2catalyst Structure CO oxidation TPR |
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