Analytical TEM study on structural changes of Au particles on cerium oxide using a heating holder

被引：25

作者：

Akita, Tomoki

Tanaka, Koji

Kohyama, Masanori

Haruta, Masatake

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Inst Ubiquitous Energy Devices, Ikeda, Osaka 5638577, Japan

[2] Tokyo Metropolitan Univ, Fac Urban Environm Sci, Mat Chem Course, Hachioji, Tokyo 1920397, Japan

来源：

CATALYSIS TODAY | 2007年 / 122卷 / 3-4期

基金：

日本学术振兴会;

关键词：

Au; CeO2; TEM; diffusion;

D O I：

10.1016/j.cattod.2007.01.014

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The structure changes of Au nano-particles supported on CeO2 were observed by using an analytical transmission electron microscope (TEM) with a specimen heating holder. The disintegration and growth of Au particles on CeO2 were successfully observed in the atomic scale. In situ observation of Au particles at elevated temperature reveals that the Au particles on CeO2 grow by Ostwald ripening process through surface diffusion. Iridium particles on CeO2 were also observed during the heating process for comparison. The growth mode of Au particles is quite different from that of In (C) 2007 Elsevier B.V. All rights reserved.

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页码：233 / 238

页数：6

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