高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (8): 1506.

• 研究论文 • 上一篇    下一篇

CeO2修饰SiO2担载Cu-Ir双金属催化剂的研究

王立楠1, 张雄伟1, 储伟1, 杨维慎2, 张涛2   

  1. 1. 四川大学化工学院, 成都610065;
    2. 中国科学院大连化学物理研究所, 大连116023
  • 收稿日期:2004-08-10 出版日期:2005-08-10 发布日期:2005-08-10
  • 通讯作者: 储 伟(1965年出生),男,教授,博士生导师,主要从事工业催化和催化材料研究.E-mail:lab230.scu.cn@163.com E-mail:lab230.scu.cn@163.com
  • 基金资助:

    国家自然科学基金重大项目(批准号:20590360);中国科学院大连化学物理研究所合作项目(批准号:03H458)资助.

Novel Cu-Ir Bimet allic Catalysts Supported on CeO-2 Modified SiO2-

WANG Li-Nan1, ZHANG Xiong-Wei1, CHU Wei1, YANG Wei-Shen2, ZHANG Tao2   

  1. 1. Department of Chemical Engineering, Sichuan University, Chengdu 610065, China;
    2. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
  • Received:2004-08-10 Online:2005-08-10 Published:2005-08-10

摘要: 制备了CeO2修饰SiO2担载型铜铱基双金属催化剂,添加CeO2使Cu-Ir/SiO2催化剂在甲醇裂解模型反应中的初始活性和稳定性明显提高,反应10h后甲醇的转化率保持在96%以上,而Cu-Ir/SiO2催化剂反应10h后活性下降至39.1%.采用XPS,H2-TPR,XRD和TEM等手段对催化剂进行了结构分析,结果表明,铜和铱发生强相互作用,加入助剂CeO2可减少催化剂颗粒团聚.

关键词: 双金属催化剂, 甲醇裂解, CeO2助剂, 铜和铱, 表征

Abstract: The novel Cu-Ir bimet allic catalysts with ceria modified silica supported were prepared via impregnation method for methanol decomposition. Cu-Ir/CeO2--SiO2- catalyst exhibited a higher catalytic activity and a better stability than Cu-Ir/SiO2- catalyst. After 10 h of reaction, the methanol conversion was still over 96% with ceria modified Cu-Ir/SiO2- catalyst, while that of Cu-Ir/SiO2- catalyst decreased to 39.1%. The catalyst samples were characterized by XPS, H2-TPR, XRD and BET techniques. The addition of ceria to silica supported Cu-Ir catalyst could improve the dispersion and restrain the sintering of the active component.

Key words: Bimet allic catalyst, Methanol decomposition, Ceria promoter, Cu-Ir, Characterization

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