Study of dispersed states of CuO on Ce0.5Zr0.5O2 and its influence on CO oxidation activity(CuO在Ce0.5Zr0.5 O2上的分散状态及其CO氧化性能的研究)
以硝酸铈和硝酸锆为原料,采用共沉淀法制备了不同摩尔比(0,0.1,0.2〜0.9,1.0)的CemZr1-mO2样品.并以Ce0.5Zr0.5O2为载体,采用浸渍法负载不同含量的CuO,在色谱流动法上考察其对CO的氧化活性.并用XRD,TPR和BET等技术对CuO/Ce0.5Zr0.5O2各样品进行了表征.结果表明,当CuO负载量为5.0%时,其CO的氧化活性最高.XRD测定表明其氧化活性的高低与铜物种在Ce0.5 Zr0.5O2上的分散状态有关.TPR结果亦显示活性的高低与Ce0.5Zr0.5O2上分散较好的铜物种的α还原峰及分散较差的γ还原峰的峰温及形状有关....
Main Authors: | JIANGXiao-yuan(蒋晓原), ZHOURen-xian(周仁贤), CHENYu(陈煜), LOULi-ping(楼莉萍), ZhengXiao-ming(郑小明) |
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Format: | Article |
Language: | zho |
Published: |
Zhejiang University Press
2001-11-01
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Series: | Zhejiang Daxue xuebao. Lixue ban |
Subjects: | |
Online Access: | https://doi.org/zjup/1008-9497.2001.28.6.653-658 |
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