Radial distribution function studies of Al2O3-La2O3 binary oxides prepared by sol-gel

被引：13

作者：

Barrera, A

Viniegra, M

Lara, VH

Bosch-Giral, P

机构：

[1] Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico

[2] Inst Mexicano Petr, Mexico City 07730, DF, Mexico

[3] Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City, DF, Mexico

来源：

CATALYSIS COMMUNICATIONS | 2004年 / 5卷 / 10期

关键词：

Al-O-2(3); La2O3; Al2O3; mixed oxides; sol-gel; structure; radial distribution function; NO reduction by H-2;

D O I：

10.1016/j.catcom.2004.07.007

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 structure of Al2O3-xLa(2)O(3) (x = 0, 2, 6, 15, 25, 50 wt%) binary oxides prepared via the sol-gel preparation method was studied by means of radial distribution functions determined from X-ray diffraction patterns. At first neighbors, the binary oxides are characterized by Al-O bond distances typical of gamma-Al2O3. At second neighbors the binary oxides show La-O and O-O bond distances of La2O3. However, at higher coordination shells, these materials present bond distances corresponding to the mixed oxides with a perovskite-type structure. These structural differences of the binary oxides could be related to their differences in activity observed in the NO reduction with H-2. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：569 / 574

页数：6

共 25 条

[21] THE INFLUENCE OF HIGH PARTIAL STEAM PRESSURES ON THE SINTERING OF LANTHANUM OXIDE DOPED GAMMA-ALUMINA [J].