The mechanism of the synthesis in connection with assignments for a solid reaction cycle of the HPA catalyst during catalytic reactions

被引：6

作者：

Ilkenhans, T ^{[1
]}

Siegert, H ^{[1
]}

Schlogl, R ^{[1
]}

机构：

[1] FHI BERLIN,D-14195 BERLIN 11,GERMANY

来源：

CATALYSIS TODAY | 1996年 / 32卷 / 1-4期

关键词：

Keggin structure; synthesis; mechanism; structure promotor effect; solid structures and reactivity; defect structures;

D O I：

10.1016/S0920-5861(96)00218-0

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The mechanisms of the oxide syntheses to PMo12 and PVMo11 were enlightened by in situ UV/VIS and P-31-NMR. Different solution stabilities of the products were discovered. After several crystalline phase transformations of the solid at higher temperatures (> 573 K) spectroscopic assignments for defect HPA formation were determined. Water supports reversible restructuring into the intact Keggin structure. As a consequence we propose a model concept for a solid repair cycle of the catalyst.

引用

页码：337 / 347

页数：11

共 29 条

[1] EPR OF VANADIUM IN CE0.25H3PVMO11O40 CATALYST - FORMATION OF VANADYL DIMERS DURING THE OXIDATIVE DEHYDROGENATION OF ISOBUTYRIC ACID [J].