The acidity and catalytic activity of heteropoly acid on MCM-41 investigated by MAS NMR, FTIR and catalytic tests

被引：146

作者：

Ghanbari-Siahkali, A ^{[1
]}

Philippou, A ^{[1
]}

Dwyer, J ^{[1
]}

Anderson, MW ^{[1
]}

机构：

[1] UMIST, Dept Chem, Ctr Microporous Mat, Manchester M60 1QD, Lancs, England

来源：

APPLIED CATALYSIS A-GENERAL | 2000年 / 192卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

heteropoly acid; mesoporous materials; MAS NMR; FTIR; catalytic testing;

D O I：

10.1016/S0926-860X(99)00333-6

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 potential of supported heteropoly acids (HPAs) is of great significance in acid catalysis. In this contribution, the HPA H3PW12O40 (PW) was impregnated into SiMCM-41 and the resulting PW/SiMCM-41 acidic system was investigated by means of spectroscopy (MAS NMR, FTIR) and catalytic testing. The complexation of PW with the SiMCM-41 hydroxyls is purported to enhance the acidity and catalytic activity of these silanols.:The effect of PW loading on structure, acidity and catalytic performance is monitored. The host material suffers severe structural distortions at higher loadings which lead to a considerable loss in the structural order. Based on these experimental findings, both acidity and catalytic performance were optimal with a loading of around 23 wt.% PW. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：57 / 69

页数：13

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