中华医学超声杂志

应用化学 ›› 1988, Vol. 0 ›› Issue (3): 48-53.

• 研究论文 • 上一篇    下一篇

2:18磷钼杂多酸(盐)在H2O2分解反应中的催化作用

曲淑华1, 吴越1, 王恩波2, 由万胜2   

  1. 1. 中国科学院长春应用化学研究所;
    2. 东北师范大学化学系
  • 收稿日期:1987-02-19 修回日期:1987-11-19 出版日期:1988-06-10 发布日期:1988-06-10

ON THE CATALYTIC BEHAVIOUR OF 2:18-HETEROPOLY-MOLYBDOPHOSPHORIC ACID (SALTS) IN THE DECOMPOSITION OF HO2

Qu Shuhua1, Wu Yue1, Wang Enbo2, You Wanshen2   

  1. 1. Changchun Institute of Applied Chemistry, Academia Sinica;
    2. Department of Chemistry, Northeast Normal University Changchun
  • Received:1987-02-19 Revised:1987-11-19 Published:1988-06-10 Online:1988-06-10

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摘要： 研究了2:18磷钼杂多酸(盐)(Dawson结构)对H2O2分解反应的催化行为.实验结果表明,H6(P2Mo18O62)和1:12磷钼杂多酸H3(PMo12O40)相同,对H2O2分解无活性,而其盐类(Fe3+、Cu2+)则有很好的催化活性,但对H2O2分解的动力学行为不同于1:12磷钼杂多酸盐,符合二级动力学反应关系式.这可能和这两种结构中抗衡阳离子所处环境不同有关.杂多酸阴离子中引入V,部份取代钼后所得实验结果与1:12磷钼钒杂多酸完全相同,表明引入的钒离子在两种结构中不仅有相同的环境而且是催化剂的活性种.

关键词: 杂多酸, 钼酸盐, 磷酸盐, 催化活性, 过氧化氢, 分解

Abstract: The catalytic behaviour of 2:18 heteropoly molybdophosphoric acid and its salts(Dawson structure) in the decomposition of H2O2 has been studied in comparison with that of 1:12 heteropolymolybdophosphoric acid and its salts (Kcggin structure). The results show that H6(P2Mo18O62, so as Ha(PMo12O40 does not posses catalytic activity for H2O2 decomPosition, whereas their Fe3+, Cu2+ salts are more active and their kinetic behaviour toward H2O2 decomposition is different from that of 1:12 heteropolymolybdophosphate in that it obeys the second order equation. It is related to the environmental difference of the countercation in these two structures. The catalytic behaviour remains unchanged, when part of molybdenum ions in 2:18 heteropolymolybdophosphorie acid is substituted by vanadium ions. It indicates that the substtituted vanadium ions are not only the active species, but have the same environment in these two structures.

Key words: Heteropolyacid, Molybdate, Phosphate, Catalytic activity, Hydrogen peroxide, Decomposition

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