Liquid-phase catalytic activity of sulfated zirconia from sol-gel precursors: the role of the surface features

被引：51

作者：

Ardizzone, S

Bianchi, CL

Cappelletti, G

Porta, F

机构：

[1] Univ Milan, Dept Phys Chem & Electrochem, I-20133 Milan, Italy

[2] Univ Milan, Dept Inorgan Metallorgan & Anal Chem, I-20133 Milan, Italy

来源：

JOURNAL OF CATALYSIS | 2004年 / 227卷 / 02期

关键词：

sulfated zirconia; liquid media catalyst; surface functionalities; XPS; sol-gel;

D O I：

10.1016/j.jcat.2004.07.030

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：

ZrO2-SO4 powders were prepared through a single step sol-gel reaction by modulating the conditions of the alkoxide hydrolysis and polycondensation steps. Sulfuric acid or (NH4)(2)SO4 was employed as the sulfating agent. The samples were calcined at 890 K and characterized as to phase composition crystallinity (XRD) and Surface area porosity (BET method). Surface functionalities were investigated by TGA/FTIR, FTIR, DRIFTS, and XPS analyses. The liquid-medium catalytic activity was tested in the esterification of benzoic acid to methylbenzoate. The role played by the conditions of the sot-gel reaction, in affecting the surface state and the catalytic properties of the powders, is discussed. (C) 2004 Elsevier Inc. All rights reserved.

引用

页码：470 / 478

页数：9

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