Effect of Ti(IV) loading on CO oxidation activity of gold on TiO2 doped amorphous silica

被引：53

作者：

Venezia, A. M.

Liotta, F. L.

Pantaleo, G.

Beck, A.

Horvath, A.

Geszti, O.

Kocsonya, A.

Guczi, L.

机构：

[1] CNR, Ist Studio Mat Nanostrutturati, I-90146 Palermo, Italy

[2] Univ Palermo, Dipartimento Chim Inorgan & Analit Stanislao Cann, I-90128 Palermo, Italy

[3] Hungarian Acad Sci, CRC, Inst Isotope & Surface Chem, Dept Surface Chem & Catalysis, H-1525 Budapest, Hungary

[4] Res Inst Tech Phys & Mat Sci, H-1525 Budapest, Hungary

[5] Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary

来源：

APPLIED CATALYSIS A-GENERAL | 2006年 / 310卷

关键词：

gold nanoparticles; TiO2/SiO2; supports; CO oxidation;

D O I：

10.1016/j.apcata.2006.05.027

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：

Amorphous SiO2, doped with various amount of TiO2, was used as support for gold nanoparticles. Gold was deposited through the controlled sol formation technique. The effect of the TiO2 loading on the structural and surface properties was investigated by transmission electron microscopy, X-ray diffraction, Raman and X-ray photoelectron spectroscopy. The catalytic behavior was tested in the oxidation of CO. A significant enhancement in the activity was observed for the gold supported on mixed oxide with low TiO2 loading. On the basis of characterization data, the positive effect is assigned to the electronic modification of the Ti(IV) of the newly formed Ti-O-Si bonds. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：114 / 121

页数：8

共 42 条

[1] [Anonymous], PRACTICAL SURFACE AN
[2] Oxidation of CO on gold supported catalysts prepared by laser vaporization: Direct evidence of support contribution
Arrii, S
Morfin, F
Renouprez, AJ
Rousset, JL
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (04) : 1199 - 1205
[3] Gold-catalysed oxidation of carbon monoxide
Bond, GC
Thompson, DT
[J]. GOLD BULLETIN, 2000, 33 (02) : 41 - 51
[4] Catalysis by gold
Bond, GC
Thompson, DT
[J]. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1999, 41 (3-4): : 319 - 388
[5] Influence of the amount of titania on the texture and structure of titania supported on silica
Castillo, R
Koch, B
Ruiz, P
Delmon, B
[J]. JOURNAL OF CATALYSIS, 1996, 161 (02) : 524 - 529
[6] CORE-LEVEL BINDING-ENERGY AND DENSITY OF STATES FROM SURFACE ATOMS OF GOLD
CITRIN, PH
WERTHEIM, GK
BAER, Y
[J]. PHYSICAL REVIEW LETTERS, 1978, 41 (20) : 1425 - 1428
[7] Support effect in high activity gold catalysts for CO oxidation
Comotti, M
Li, WC
Spliethoff, B
Schüth, F
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (03) : 917 - 924
[8] Supported gold/MOx catalysts for NO/H2 and CO/O2 reactions
Dekkers, MAP
Lippits, MJ
Nieuwenhuys, BE
[J]. CATALYSIS TODAY, 1999, 54 (04) : 381 - 390
[9] CHARACTERIZATION OF TITANIA SILICALITES
DEO, G
TUREK, AM
WACHS, IE
HUYBRECHTS, DRC
JACOBS, PA
[J]. ZEOLITES, 1993, 13 (05): : 365 - 373
[10] TITANIA-SILICA MIXED OXIDES .1. INFLUENCE OF SOL-GEL AND DRYING CONDITIONS ON STRUCTURAL-PROPERTIES
DUTOIT, DCM
SCHNEIDER, M
BAIKER, A
[J]. JOURNAL OF CATALYSIS, 1995, 153 (01) : 165 - 176

← 1 2 3 4 5 →