HREM CHARACTERIZATION OF METAL-CATALYSTS SUPPORTED ON RARE-EARTH-OXIDES - SAMARIUM OXIDE AS SUPPORT

被引：15

作者：

BERNAL, S

BOTANA, FJ

CALVINO, JJ

CIFREDO, GA

GARCIA, R

RODRIGUEZIZQUIERDO, JM

机构：

[1] Department of Inorganic Chemistry, University of Cádiz

来源：

ULTRAMICROSCOPY | 1990年 / 34卷 / 1-2期

关键词：

D O I：

10.1016/0304-3991(90)90058-T

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

High-resolution transmission electron microscopy has been applied to the characterization of the Rh/Sm2O3 system. The comparison between Rh/CeO2 and Rh/Sm2O3 catalysts suggests a model of behavior that would be operative for metals supported on rare-earth sesquioxides. The model assumes that a significant dissolution of the support takes place during the impregnation step. As a consequence, the metal would be present in a highly dispersed state after the drying process, forming a mixed phase with the support material, which explains why metal crystallites are only observed after reduction followed by heat treatment at high temperature. © 1990.

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页码：60 / 65

页数：6

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