POLYOXOMETALATES CATALYST MATERIALS - X-RAY THERMAL-STABILITY STUDY OF PHOSPHORUS-CONTAINING HETEROPOLYACIDS H3+XPM12-XVXO40.13-14H2O (M = MO,W - X = 0-1)

被引：161

作者：

FOURNIER, M

FEUMIJANTOU, C

RABIA, C

HERVE, G

LAUNAY, S

机构：

[1] UNIV PARIS 06,CRISTALLOCHIM SOLIDE LAB,URA 1388,F-75252 PARIS 05,FRANCE

[2] UNIV SCI & TECHNOL HOUARI BOUMEDIENNE,INST CHIM,CHIM GAZ NAT LAB,ALGIERS,ALGERIA

来源：

JOURNAL OF MATERIALS CHEMISTRY | 1992年 / 2卷 / 09期

关键词：

POLYOXOMOLYBDATE; POLYOXOTUNGSTATE; X-RAY DIFFRACTION; THERMAL STABILITY;

D O I：

10.1039/jm9920200971

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 phase evolution, under thermal treatment, of the 12-molybdo(tungsto)phosphoric acids and their related 1-vanado-substituted compounds has been studied by in situ X-ray diffraction methods. The anhydrous acid temperature range is clearly observed for the 12-molybdo(tungsto)phosphoric acid parents via formation of a tetragonal phase. However, the vanadium monosubstituted acids seem to transform into the 12-metallo parents. In the case of the 1-vanado-11-tungstophosphoric acid a curious evolution, via a very stable cubic lattice, suggests thermal stabilization of the 12-tungstophosphate anion through the formation of an anhydrous VO2+ salt.

引用

页码：971 / 978

页数：8

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