ONSET OF PEROVSKITE FORMATION IN THE CATALYTIC-SYSTEM LA2O3/GAMMA-AL2O3

被引：16

作者：

ALVAREZ, LJ

SANZ, JF

CAPITAN, MJ

ODRIOZOLA, JA

机构：

[1] UNIV SEVILLA,FAC QUIM,DEPT QUIM FIS,E-41012 SEVILLE,SPAIN

[2] UNIV SEVILLA,INST CIENCIA MAT SEVILLA,E-41012 SEVILLE,SPAIN

[3] UNIV SEVILLA,DEPT QUIM INORGAN,E-41012 SEVILLE,SPAIN

来源：

CATALYSIS LETTERS | 1993年 / 21卷 / 1-2期

关键词：

ALUMINA; PEROVSKITE; MOLECULAR DYNAMICS;

D O I：

10.1007/BF00767374

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：

Molecular dynamics simulations of model systems for the surface interaction of lanthanum oxide supported on gamma-alumina have been carried out at 1500 K. The onset of formation of perovskite-like phases has been analysed in samples containing four different concentrations of lanthanum oxide. A mechanism of the formation of perovskite-like polyhedra is proposed. This mechanism essentially involves a displacement of an oxide ion associated to an octahedral aluminum by a lanthanum ion and appears to be independent of La2O3 loadings.

引用

页码：89 / 97

页数：9

共 13 条

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