Effect of sol-gel derived Al2O3-ZrO2 and Al2O3-TiO2 oxides on the selectivity of NO reduction by CO under oxidizing conditions

被引：6

作者：

Castillo, S

Gómez, R

Morán-Pineda, M

机构：

[1] Inst Mexicano Petr, IM, FQG, Mexico City 07730, DF, Mexico

[2] Inst Politecn Nacl, ESIQIE, Unidad Profes Adolfo Lopez Mateos, Mexico City 07738, DF, Mexico

[3] Univ Autonoma Metropolitana Iztapalapa, Dept Chem, Mexico City 09340, DF, Mexico

来源：

REACTION KINETICS AND CATALYSIS LETTERS | 2003年 / 79卷 / 02期

关键词：

sol-gel binary oxides; alumina-zirconia; alumina-titania; platinum sol-gel catalysts; reduction of NO by CO;

D O I：

10.1023/A:1024534118277

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：

The role of Al2O3-ZrO2 and Al2O3-TiO2 sol-gel prepared supports in the activity of platinum for the NO reduction by CO under oxidizing conditions has been studied. Al-27 MAS-NMR spectra have shown the fori-nation of pentacoordinate Al-V in alumina-zirconia support. ZrO2 or TiO2 crystalline phases cannot be identified by XRD diffraction, suggesting the fort-nation of nanosized structures supported on alumina. When the reaction was carried out in presence of oxygen, large amounts of NO2 were observed on Pt/Al2O3-ZrO2 catalyst, while the formation of N2O is more pronounced on Pt/Al2O3-TiO2 catalyst. The effect of water during NO reduction is discussed.

引用

收藏

页码：271 / 279

页数：9

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