高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (6): 1043.

• 论文 • 上一篇    下一篇

氧化镁负载磷钼钒杂多酸催化剂的结构和催化性能

周广栋, 程铁欣, 庄红, 刘延, 李文兴, 毕颖丽, 甄开吉   

  1. 吉林大学化学学院, 长春 130023
  • 收稿日期:2002-09-25 出版日期:2003-06-24 发布日期:2003-06-24
  • 通讯作者: 甄开吉(1932年出生),男,教授,博士生导师,从事多相催化表面化学研究.E-mail:zkj@jlu.edu.cn E-mail:zkj@jlu.edu.cn
  • 基金资助:

    国家博士学科点专项基金(批准号:1999018308)资助

Structure and Catalytic Activities of Magnesia Supported Molybdovanadophosphoric Acid Catalysts

ZHOU Guang-Dong, CHENG Tie-Xin, ZHUANG Hong, LIU Yan, LI Wen-Xing, BI Ying-Li, ZHEN Kai-Ji   

  1. College of Chemistry, Jilin University, Changchun 130023, China
  • Received:2002-09-25 Online:2003-06-24 Published:2003-06-24

摘要: 采用乙醇溶液中浸渍的方法制备了氧化镁负载的磷钼钒酸铜(Cu2PMo11VO40)催化剂,考察了正己醇选择氧化生成正己醛的催化反应性能.催化剂的IR,XRD,UV-DRS,NMR,DTA-TG和比表面积等测试结果表明,Cu2PMo11VO40在氧化镁表面单层分散,形成缺位型Keggin结构.反应后催化剂表面分散状态及结构未发生明显改变,Keggin型对称结构有所恢复,形成活化状态的缺位型Keggin结构.

关键词: 结构, 催化性能, 氧化镁, 磷钼钒酸铜

Abstract: MgO supported copper salts of molybdovanadophosphoric acid H4PMo11VO40 catalysts were prepared in alcohol by impregnation, and its catalytic activities for the reaction of n-hexanol conversion towards n-hexanal exhibit a higher selectivity(>93% in all case). Chemical nature and texture of MgO were not damaged in the alcohoLImpregnation solution. The measurements of IR, XRD, UV-DRS, NMR, DTA-TG and BET surface area showed that the copper salts of molybdovanadophosphoric acid monolayer dispersed on the surface of MgO and the Keggin type structure of the heteropoly acid salts only partly decomposed. It is observed that the Keggin type structure could be renewed after the catalytic reaction, and an activity phase was formed.

Key words: Structure, Catalytic activity, Magnesia, Molybdovanadophosphoric acid

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