FORMATION OF H3O+ AT THE BRONSTED SITE IN SAPO-34 CATALYSTS

被引：122

作者：

MARCHESE, L ^{[1
]}

CHEN, JS ^{[1
]}

WRIGHT, PA ^{[1
]}

THOMAS, JM ^{[1
]}

机构：

[1] UCL ROYAL INST GREAT BRITAIN, DAVY FARADAY RES LAB, 21 ALBEMARLE ST, LONDON W1X 4BS, ENGLAND

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 31期

关键词：

D O I：

10.1021/j100133a001

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：

Diffuse reflectance infrared spectroscopy, combined with thermogravimetry, of progressively dehydrated (up to 550-degrees-C) silicoaluminophosphate (SAPO-34) reveals that, at room temperature, there is a stoichiometric proton transfer from the bridging hydroxyl Bronsted acid site to the physisorbed water. All six predicted infrared vibrations for the H3O+ oxonium ion in C(s) or C1 symmetry are identified. In a typical sample there are 10.0 x 10(20) H3O+ ions g-1.

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页码：8109 / 8112

页数：4

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