TEM observations of Au and Ir particles supported on CeO2

被引：11

作者：

Akita, T

Okumura, M

Tanaka, K

Kohyama, M

Tsubota, S

Haruta, M

机构：

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

[2] Osaka Univ, Grad Sch Sci, Dept Chem, Toyonaka, Osaka 5600043, Japan

[3] AIST, Natl Inst Adv Ind Sci & Technol, Res Inst Green Technol, Tsukuba, Ibaraki 0358569, Japan

来源：

JOURNAL OF ELECTRON MICROSCOPY | 2005年 / 54卷

关键词：

TEM; ADF-STEM; catalyst; Au and Ir; CeO2;

D O I：

10.1093/jmicro/54.suppl_1.i81

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

Au/CeO2 and Ir/CeO2 catalysts were observed by a transmission electron microscope in order to investigate the nano-structures of Au and Ir particles and CeO2 grains and the interface structure between metallic particles and CeO2. An annular dark field scanning transmission electron microscope (ADF-STEM) and an energy dispersive X-ray spectroscopy (EDS) revealed that the metallic particles smaller than 2 nm in diameter are highly dispersed on CeO2 supports in both catalysts. For model samples of larger CeO2 particles with flat facets of low-index surfaces, high resolution transmission electron microscopy observations of Au/CeO2 and Ir/CeO2 interfaces were made and the epitaxial relationship between Au and CeO2, (111)[110](Au)//(111)[1 (1) over bar0](CeO2) has been found for the first time.

引用

页码：I81 / I85

页数：5

共 20 条

[1]

Akita T, 2004, MATER RES SOC SYMP P, V804, P211

[2] Structural analyses by TEM of iridiurn deposited on TiO2 powder and rutile single crystal [J].