Stabilization of cationic gold species on Au/CeO2 catalysts under working conditions

被引：83

作者：

Concepcion, Patricia ^{[1
]}

Carrettin, Silvio ^{[1
]}

Corma, Avelino ^{[1
]}

机构：

[1] Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Valencia 46022, Spain

来源：

APPLIED CATALYSIS A-GENERAL | 2006年 / 307卷 / 01期

关键词：

FTIR; CO adsorption; oxidized gold; nanocrystalline CeO2;

D O I：

10.1016/j.apcata.2006.03.004

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：

Infrared spectroscopy of CO adsorption at low temperature has shown the presence of oxidized gold species (Au+ and Au3+) on nanocrystalline Au/CeO2 catalyst. This species are quite stable even under reduction conditions like the CO oxidation reaction. The concentration of this species decrease by increasing the pre-treatment temperature of the AU/CeO2 catalyst which is in accordance with a decrease in the catalytic activity of the sample. In accordance oxidized gold species are involved in the catalytic activity of Au/CeO2 catalyst for CO oxidation although the participation of metallic sites cannot be excluded. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：42 / 45

页数：4

共 28 条

[1] A collaborative effect between gold and a support induces the selective oxidation of alcohols
Abad, A
Concepción, P
Corma, A
García, H
[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2005, 44 (26) : 4066 - 4069
[2] Characterization and catalytic properties of combustion synthesized Au/CeO2 catalyst
Bera, P
Hegde, MS
[J]. CATALYSIS LETTERS, 2002, 79 (1-4) : 75 - 81
[3] Au/TiO2 nanostructured catalyst:: pressure and temperature effects on the FTIR spectra of CO adsorbed at 90 K
Boccuzzi, F
Chiorino, A
Manzoli, M
[J]. SURFACE SCIENCE, 2002, 502 : 513 - 518
[4] THE OXIDATION AND SCRAMBLING OF CO WITH OXYGEN AT ROOM-TEMPERATURE ON AU/ZNO
BOCCUZZI, F
CHIORINO, A
TSUBOTA, S
HARUTA, M
[J]. CATALYSIS LETTERS, 1994, 29 (1-2) : 225 - 234
[5] FTIR study of carbon monoxide oxidation and scrambling at room temperature over gold supported on ZnO and TiO2 .2.
Boccuzzi, F
Chiorino, A
Tsubota, S
Haruta, M
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (09) : 3625 - 3631
[6] FTIR study of the electronic effects of CO adsorbed on gold nanoparticles supported on titania
Boccuzzi, F
Chiorino, A
Manzoli, M
[J]. SURFACE SCIENCE, 2000, 454 (01) : 942 - 946
[7] Catalysis by gold
Bond, GC
Thompson, DT
[J]. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1999, 41 (3-4): : 319 - 388
[8] Stabilization of Au(III) on heterogeneous catalysts and their catalytic similarities with homogeneous Au(III) metal organic complexes
Carrettin, S
Corma, A
Iglesias, M
Sánchez, F
[J]. APPLIED CATALYSIS A-GENERAL, 2005, 291 (1-2) : 247 - 252
[9] Nanocrystalline CeO2 increases the activity of an for CO oxidation by two orders of magnitude
Carrettin, S
Concepción, P
Corma, A
Nieto, JML
Puntes, VF
[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2004, 43 (19) : 2538 - 2540
[10] Catalytic combustion of volatile organic compounds on Au/CeO2/Al2O3 and Au/Al2O3 catalysts
Centeno, MA
Paulis, M
Montes, M
Odriozola, JA
[J]. APPLIED CATALYSIS A-GENERAL, 2002, 234 (1-2) : 65 - 78

← 1 2 3 →