TEM and HAADF-STEM study of the structure of Au nano-particles on CeO2

被引：27

作者：

Akita, Tomoki ^{[1
]}

Tanaka, Koji ^{[1
]}

Kohyama, Masanori ^{[1
]}

机构：

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

来源：

JOURNAL OF MATERIALS SCIENCE | 2008年 / 43卷 / 11期

基金：

日本学术振兴会;

关键词：

D O I：

10.1007/s10853-007-2401-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structure and growth process of Au particles on CeO2 were observed by the transmission electron microscope (TEM) equipped with the high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) system. The growth of Au particles on CeO2 was shown to be mainly Ostwald ripening under heating at various temperatures, although it is suppressed in the hydrogen atmosphere. In the HAADF-STEM observation of Au/CeO2 interfaces with the orientation relationship of (111)[1-10]Au//(111)[1-10]CeO2, (111)[-110]Au//(111)[1-10]CeO2 and atomic columns of Au and Ce were successfully resolved, and the interface structure was analyzed in details for the first time.

引用

页码：3917 / 3922

页数：6

共 21 条

[1] TEM observation of gold nanoparticles deposited on cerium oxide [J].

Akita, T ;

Okumura, M ;

Tanaka, K ;

Kohyama, M ;

Haruta, M .

JOURNAL OF MATERIALS SCIENCE, 2005, 40 (12) :3101-3106

[2] Analytical TEM study on structural changes of Au particles on cerium oxide using a heating holder [J].

Akita, Tomoki ;

Tanaka, Koji ;

Kohyama, Masanori ;

Haruta, Masatake .

CATALYSIS TODAY, 2007, 122 (3-4) :233-238

[3] Analytical TEM observation of Au nano-particles on cerium oxide [J].

Akita, Tomoki ;

Okumura, Mitsutaka ;

Tanaka, Koji ;

Kohyama, Masanori ;

Haruta, Masatake .

CATALYSIS TODAY, 2006, 117 (1-3) :62-68

[4] The interpretation of HREM images of supported metal catalysts using image simulation:: profile view images [J].

Bernal, S ;

Botana, FJ ;

Calvino, JJ ;

López-Cartes, C ;

Pérez-Omil, JA ;

Rodríguez-Izquierdo, JM .

ULTRAMICROSCOPY, 1998, 72 (3-4) :135-164

[5] Direct experimental determination of the atomic structure at internal interfaces [J].

Browning, ND ;

Pennycook, SJ .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1996, 29 (07) :1779-1798

[6] Gold catalysts for pure hydrogen production in the water-gas shift reaction: activity, structure and reaction mechanism [J].

Burch, Robbie .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2006, 8 (47) :5483-5500

[7] Electron localization determines defect formation on ceria substrates [J].

Esch, F ;

Fabris, S ;

Zhou, L ;

Montini, T ;

Africh, C ;

Fornasiero, P ;

Comelli, G ;

Rosei, R .

SCIENCE, 2005, 309 (5735) :752-755

[8] Nanostructured Au-CeO2 catalysts for low-temperature water-gas shift [J].

Fu, Q ;

Weber, A ;

Flytzani-Stephanopoulos, M .

CATALYSIS LETTERS, 2001, 77 (1-3) :87-95

[9] When gold is not noble: Catalysis by nanoparticles [J].

Haruta, A .

CHEMICAL RECORD, 2003, 3 (02) :75-87

[10] Advances in the catalysis of Au nanoparticles [J].

Haruta, M ;

Daté, M .

APPLIED CATALYSIS A-GENERAL, 2001, 222 (1-2) :427-437

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