FTIR study of isopropanol reactivity on calcined layered double hydroxides

被引：34

作者：

del Arco, M ^{[1
]}

Gutiérrez, S ^{[1
]}

Martín, C ^{[1
]}

Rives, V ^{[1
]}

机构：

[1] Univ Salamanca, Dept Quim Inorgan, E-37008 Salamanca, Spain

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2001年 / 3卷 / 01期

关键词：

D O I：

10.1039/b007282f

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：

A FTIR spectroscopy study on the surface reactivity of calcined layered double hydroxides (LDH), with different cations in the interlayer space (namely, carbonate, nitrate, silicate, and berate), for isopropanol oxidation is reported. The LDHs were previously calcined at 600 degreesC and then their surface acidity was quantitatively determined via volumetric determination of ammonia adsorption. Surface Lewis and/or Bronsted acid and basic sites were qualitatively studied by FTIR monitoring of the adsorption of pyridine and boric acid trimethyl ester. Carbonate and nitrate samples show surface acidity and basicity and hence the maximum activity for acetone formation through dehydrogenation of isopropanol. In contrast, although the silicate sample displays maximum surface acidity, the lack of an appreciable amount of surface basic sites gives rise to a lower activity in the named reaction, of the same order as that shown by the berate sample.

引用

页码：119 / 126

页数：8

共 36 条

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