Mobility of Au on TiOx substrates with different stoichiometry and defectivity

被引：25

作者：

Sedona, Francesco ^{[1
,2
]}

Sambi, Mauro ^{[1
,2
]}

Artiglia, Luca ^{[1
,2
]}

Rizzi, Gian Andrea ^{[1
,2
]}

Vittadini, Andrea ^{[2
,3
]}

Fortunelli, Alessandro ^{[4
]}

Granozzi, Gaetano ^{[1
,2
]}

机构：

[1] CNR, INFM, Dipartimento Sci Chim, Unita Ric, I-35131 Padua, Italy

[2] Univ Padua, INSTM, I-35131 Padua, Italy

[3] ISTM CNR, Dipartimento Sci Chim, I-35131 Padua, Italy

[4] IPCF CNR, I-56124 Pisa, Italy

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 09期

关键词：

D O I：

10.1021/jp711801w

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：

Au nanoparticles deposited on titania films, where two nanophases of different stoichiometry and defectivity are co-present, were imaged on the same spot by scanning tunneling microscopy. The observed sizes are rather dissimilar as a consequence of the different mobility of An on the two surfaces. The role of the stoichiometry, which can influence the Au-substrate interaction, and of the defects, which can trap the metal atoms, is discussed on the basis of theoretical calculations of diffusion energy barriers on the two surfaces.

引用

收藏

页码：3187 / 3190

页数：4

相关论文

共 31 条

[1] Diffusion of palladium clusters on magnesium oxide [J].

Barcaro, G ;

Fortunelli, A ;

Nita, F ;

Ferrando, R .

PHYSICAL REVIEW LETTERS, 2005, 95 (24)

[2] Structure of a TiOx zigzag-like monolayer on pt(111) [J].

Barcaro, Giovanni ;

Sedona, Francesco ;

fortunelli, Alessandro ;

Granozzi, Gaetano .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (16) :6095-6102

[3] The impact of nanoscience on heterogeneous catalysis [J].

Bell, AT .

SCIENCE, 2003, 299 (5613) :1688-1691

[4] Oxide templates for self-assembling arrays of metal nanoclusters [J].

Berdunov, N. ;

Mariotto, G. ;

Balakrishnan, K. ;

Murphy, S. ;

Shvets, I. V. .

SURFACE SCIENCE, 2006, 600 (21) :L287-L290

[5] The structure of ordered Au films on TiOx [J].

Chen, M. S. ;

Luo, K. ;

Kumar, D. ;

Wallace, W. T. ;

Yi, C. -W. ;

Gath, K. K. ;

Goodman, D. W. .

SURFACE SCIENCE, 2007, 601 (03) :632-637

[6] Catalytically active gold: From nanoparticles to ultrathin films [J].

Chen, Mingshu ;

Goodman, D. Wayne .

ACCOUNTS OF CHEMICAL RESEARCH, 2006, 39 (10) :739-746

[7] On the origin of the unique properties of supported Au nanoparticles [J].

Chen, Mingshu ;

Cai, Yun ;

Yan, Zhen ;

Goodman, D. Wayne .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (19) :6341-6346

[8] The structure of catalytically active gold on titania [J].

Chen, MS ;

Goodman, DW .

SCIENCE, 2004, 306 (5694) :252-255

[9] Unravelling the origin of the high-catalytic activity of supported Au:: A density-functional theory-based interpretation [J].

Cruz Hernandez, Norge ;

Fdez. Sanz, Javier ;

Rodriguez, Jose A. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (49) :15600-15601

[10] Thin alumina films on Ni3Al(111):: A template for nanostructured Pd cluster growth [J].

Degen, S ;

Becker, C ;

Wandelt, K .

FARADAY DISCUSSIONS, 2004, 125 :343-356

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