ACIDIC PROPERTIES OF SUPPORTED NIOBIUM OXIDE CATALYSTS - AN INFRARED-SPECTROSCOPY INVESTIGATION

被引：334

作者：

DATKA, J ^{[1
]}

TUREK, AM ^{[1
]}

JEHNG, JM ^{[1
]}

WACHS, IE ^{[1
]}

机构：

[1] LEHIGH UNIV,DEPT CHEM ENGN,ZETTLEMEYER CTR SURFACE STUDIES,BETHLEHEM,PA 18015

来源：

JOURNAL OF CATALYSIS | 1992年 / 135卷 / 01期

关键词：

D O I：

10.1016/0021-9517(92)90279-Q

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：

Chemisorption of pyridine was applied as a method for studying the acidic properties of niobium pentoxide supported on silica, magnesia, alumina, titania, and zirconia. The infrared spectra of adsorbed pyridine were used to evaluate the concentration and the relative strength of Brønsted and Lewis acid sites. Lewis acidity was found in all the supported niobium oxide systems, while Brønsted acid sites were only detected for niobia supported on the al umina and silica supports. The origin and characteristics of the surface acid sites present in supported niobium oxide catalysts are discussed in the present study. © 1992.

引用

页码：186 / 199

页数：14

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