CATALYSIS BY POLYOXOMETALATES .3. INFLUENCE OF VANADIUM(V) ON THE THERMAL-STABILITY OF 12-METALLOPHOSPHORIC ACIDS FROM INSITU INFRARED STUDIES

被引：130

作者：

ROCCHICCIOLIDELTCHEFF, C

FOURNIER, M

机构：

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1991年 / 87卷 / 24期

关键词：

D O I：

10.1039/ft9918703913

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The 12-molybdo(tungsto)phosphoric acids, and the related compounds 1-vanado-11-molybdo(tungsto)phosphoric acids, all having the Keggin structure, have been studied at different temperatures in a special infrared cell allowing experiments in a controlled atmosphere. The effects of dehydration and the thermal stability are discussed. The anhydrous acids are evidenced only for the two 12-molybdo- and 12-tungsto-phosphoric acids: for the vanado compounds, the results are in agreement with the release of vanadium from the host Keggin structure, when increasing the temperature and duration of the treatments in a dry atmosphere. The effect of exposure to water vapour after the thermal treatments is also discussed.

引用

页码：3913 / 3920

页数：8

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