CHARACTERIZATION OF VANADIUM SILICA AND COPPER SILICA AEROGEL CATALYSTS

被引：15

作者：

OWENS, L ^{[1
]}

TILLOTSON, TM ^{[1
]}

HAIR, LM ^{[1
]}

机构：

[1] LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1995年 / 186卷

关键词：

D O I：

10.1016/0022-3093(95)00070-4

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Vanadium/silica and copper/silica aerogels have been prepared using the sol-gel method followed by CO2 exchange and supercritical extraction. Structural properties of samples supercritically dried, oxidized and used in reactions studies conducted with a feed representing the average composition of automobile exhaust from a lean burn engine were investigated using laser Raman spectroscopy and temperature-programmed reduction. No evidence of crystalline V2O5 was found for the vanadium/silica aerogel, freshly extracted, oxidized or following exposure to reaction conditions using these techniques. However, results obtained for the copper/silica sample indicate that changes in the structure of the copper species had occurred as the sample was oxidized and exposed to reaction conditions.

引用

页码：177 / 183

页数：7

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