CO oxidation on Aun/TiO2 catalysts produced by size-selected cluster deposition

被引：319

作者：

Lee, SS ^{[1
]}

Fan, CY ^{[1
]}

Wu, TP ^{[1
]}

Anderson, SL ^{[1
]}

机构：

[1] Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2004年 / 126卷 / 18期

关键词：

D O I：

10.1021/ja049436v

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Planar model catalysts were prepared by deposition of size-selected gold clusters containing up to seven atoms on rutile TiO2 (110). Molecular oxygen is observed to bind inefficiently to the surface, probably at oxygen vacancies, and some oxygen also appears to bind to the gold clusters. Stable CO binding is observed atop gold for catalysts prepared by Au and Au2 deposition, but not for larger Aun. CO oxidation activity is strongly dependent on cluster size, with Au7-prepared samples >50 times more reactive than samples prepared by Au or Au2 deposition. Copyright © 2003 American Chemical Society.

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页码：5682 / 5683

页数：2

相关论文

共 16 条

[1] Deposition dynamics and chemical properties of size-selected Ir clusters on TiO2 [J].

Aizawa, M ;

Lee, S ;

Anderson, SL .

SURFACE SCIENCE, 2003, 542 (03) :253-275

[2] Sintering, oxidation, and chemical properties of size-selected nickel clusters on TiO2(110) [J].

Aizawa, M ;

Lee, S ;

Anderson, SL .

JOURNAL OF CHEMICAL PHYSICS, 2002, 117 (10) :5001-5011

[3] The kinetics of CO oxidation by adsorbed oxygen on well-defined gold particles on TiO2(110) [J].

Bondzie, VA ;

Parker, SC ;

Campbell, CT .

CATALYSIS LETTERS, 1999, 63 (3-4) :143-151

[4] Evidence for oxygen adatoms on TiO2(110) resulting from O2 dissociation at vacancy sites [J].

Epling, WS ;

Peden, CHF ;

Henderson, MA ;

Diebold, U .

SURFACE SCIENCE, 1998, 412-13 :333-343

[5] Active nonmetallic Au and Pt species on ceria-based water-gas shift catalysts [J].

Fu, Q ;

Saltsburg, H ;

Flytzani-Stephanopoulos, M .

SCIENCE, 2003, 301 (5635) :935-938

[6] Gold/titania interfaces and their role in carbon monoxide oxidation [J].

Grunwaldt, JD ;

Baiker, A .

JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (06) :1002-1012

[7] Size- and support-dependency in the catalysis of gold [J].

Haruta, M .

CATALYSIS TODAY, 1997, 36 (01) :153-166

[8]

HWANG GS, 2004, COMMUNICATION

[9] Turn-over frequencies of catalytic reactions on nanocatalysts measured by pulsed molecular beams and quantitative mass spectrometry [J].

Judai, K ;

Abbet, S ;

Wörz, AS ;

Röttgen, MA ;

Heiz, U .

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 2003, 229 (1-2) :99-106

[10] Cryogenic CO oxidation on TiO2-supported gold nanoclusters precovered with atomic oxygen [J].

Kim, TS ;

Stiehl, JD ;

Reeves, CT ;

Meyer, RJ ;

Mullins, CB .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (08) :2018-2019