Surface structure and acidity of alumina-boria catalysts

被引：76

作者：

Sato, S ^{[1
]}

Kuroki, M ^{[1
]}

Sodesawa, T ^{[1
]}

Nozaki, F ^{[1
]}

Maciel, GE ^{[1
]}

机构：

[1] COLORADO STATE UNIV, DEPT CHEM, FT COLLINS, CO 80523 USA

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 1995年 / 104卷 / 02期

关键词：

B-11 MAS NMR; alumina-boria; acid sites; Bronsted acid sites;

D O I：

10.1016/1381-1169(95)00105-0

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：

Both surface borate structures and acidities of alumina-boria catalysts prepared by supporting B2O3 (boria) on an alumina support were investigated by using both B-11 magic angle spinning (MAS) NMR measurements and temperature-programmed desorption (TPD) of adsorbed pyridines, together with the catalytic properties of these alumina-boria materials for l-butene isomerization. The concentrations of tetrahedral oxygen-coordinated borate (BO4) species as well as number of Bronsted acid sites were found to increase with increasing boria content. The catalytic activity for l-butene isomerization was found to be caused by the strong Bronsted acid sites generated from BO4 species on the surface of alumina.

引用

页码：171 / 177

页数：7

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