中华医学超声杂志

应用化学 ›› 1996, Vol. 0 ›› Issue (5): 58-60.

• 研究简报 • 上一篇    下一篇

丙烷氧化反应中多组分氧化物Bi－V－Mo－O催化作用的红外光谱研究

李静, 宋伟, 窦伯生   

  1. 中国科学院长春应用化学研究所 长春 130022
  • 收稿日期:1995-12-25 修回日期:1996-05-23 出版日期:1996-10-10 发布日期:1996-10-10
  • 基金资助:
    “八五”中国科学院重点应用研究项目

IR Spectroscopic Investigation of the Catalytic Action of Multicomponent Oxide Bi-V-Mo-O for Selective Oxidation of Propane

Li Jing, Song Wei, Dou Bosheng   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1995-12-25 Revised:1996-05-23 Published:1996-10-10 Online:1996-10-10

PDF

357

摘要： 迄今对于含有铝、秘复合氧化物催化剂的活性中心和作用机理存在不同看法,本文采用红外光谱法,探讨了复合氧化物钥钒酸秘在丙烷选择氧化反应中的催化作用机理.

关键词: 钼钒酸铋, 丙烷, 选择氧化, 催化作用机理, 红外光谱

Abstract: The mechanism of multicomponent oxide bismuth vanadomolybdate catalysts for the seldctive oxidation of propane to acrolein has been investigated by IR spectroscopy. The results of IR spectra show that when cation vacancies are introduced randomly in the lattice by replacing V5+ with Mo6+ in the scheelite oxides Bi1-x/3V1-xMoxO4, some of the oxygen combined with Bi cation are released and the tetrahedron Mo(V)O4 may be distorted to some extent. The formation of the shared structure Mo─O─V makes it possible for lattice oxygen ions to diffuse into the bulk of catalyst. The Mo=O double bond, which plays an important role in selective oxidation, has formed by introducing cation vacancies when χ is 0.45,namely in Bi0.85V0.55Mo0.45O4 catalyst. The synergistic effect between Mo=O double bond and stronger Bi─O─V bond accounts for the better catalytic performance of this catalyst.

Key words: bismuth vanadomolybdate, propane, selective oxidation, mechanism of catalytic action, IR spectrum

网站版权 © 应用化学     本网站备案：吉ICP备12000082号