Pseudo-Bridging Silanols as Versatile Bronsted Acid Sites of Amorphous Aluminosilicate Surfaces

被引：109

作者：

Chizallet, Celine ^{[1
]}

Raybaud, Pascal ^{[1
]}

机构：

[1] Inst Francais Petr Lyon, Direct Catalyse & Separat, F-69360 Solaize, France

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2009年 / 48卷 / 16期

关键词：

acidity; aluminosilicates; density functional calculations; surface chemistry; water adsorption; GAMMA-ALUMINA SURFACES; SILICA-ALUMINA; PENTACOORDINATED ALUMINUM; MAGNETIC-RESONANCE; HYDROXYL-GROUPS; LOW-TEMPERATURE; CATALYSTS; ZEOLITES; SIMULATION; NMR;

D O I：

10.1002/anie.200804580

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Amorphization tunes acidity: Pseudo-bridging silanols, suggested as versatile Brønsted acid groups by molecular modeling studies, are obtained by shifted hydrolysis of Si-O-Al bridges formed by the thermal treatment of silica deposited on Γ-Al2O3 (100), and appear under given pretreatment conditions. Demixing of part of the silica from the aluminosilicate phase is predicted upon excess water adsorption. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.

引用

页码：2891 / 2893

页数：3

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