Fourier transform infrared spectroscopic study of surface acidity by pyridine adsorption on Mo/ZrO2-SiO2(Al2O3) catalysts

被引：32

作者：

Damyanova, S

Centeno, MA

Petrov, L

Grange, P

机构：

[1] Bulgarian Acad Sci, Inst Catalysis, Sofia 1113, Bulgaria

[2] Univ Sevilla, CSIC, Dept Quim Inorgan, Seville, Spain

[3] Univ Sevilla, CSIC, Inst Ciencia Mat Sevilla, Seville, Spain

[4] Univ Catholique Louvain, Unite Catalyse & Chim Mat Divises, B-1348 Louvain, Belgium

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2001年 / 57卷 / 12期

关键词：

FTIR of pyridine adsorption; Bronsted and Lewis acidity; ZrO2-SiO2 and ZrO2-Al2O3 supports; molybdenum catalysts;

D O I：

10.1016/S1386-1425(01)00456-5

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Acidity of the oxidic molybdenum catalysts supported on mixed ZrO2-SiO2 and ZrO2-Al2O3 carriers was investigated by Fourier transform infrared spectroscopy of pyridine adsorption. Deposition of molybdenum on ZrO2-SiO2 and ZrO2-Al2O3 supports leads to formation of surface Bronsted acid sites. The number of the Bronsted and Lewis acid sites in supported-molybdenum catalysts depends on both the ZrO2 content and the type of the support. With increasing ZrO2 content, the Lewis acid sites increase for both series of catalysts. The Bronsted acid sites are higher for Mo/ZrO2-SiO2, samples compared to those for Mo/ZrO2-Al2O3 and also increase with zirconia. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：2495 / 2501

页数：7

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