TiO2 supported nano-Au catalysts prepared via solvated metal atom impregnation for low-temperature CO oxidation

被引：19

作者：

Wu, SH ^{[1
]}

Zheng, XC ^{[1
]}

Wang, SR ^{[1
]}

Han, DZ ^{[1
]}

Huang, WP ^{[1
]}

Zhang, SM ^{[1
]}

机构：

[1] Nankai Univ, Dept Chem, Tianjin 300071, Peoples R China

来源：

CATALYSIS LETTERS | 2004年 / 96卷 / 1-2期

关键词：

CO oxidation; nano-particles of gold; TiO2; solvated metal atom impregnation; stability;

D O I：

10.1023/B:CATL.0000029528.60669.cf

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：

TiO2 supported nano-Au catalysts were prepared by solvated metal atom impregnation (SMAI) method. The catalysts were characterized by means of AAS, TPD, H-2 reduction desorption (H-2-RD), XRD, TEM, XPS and tested for low-temperature CO oxidation. XRD and TEM results showed that the pretreatment temperature had an influence on the particle size of Au/TiO2 catalysts. The average particle size increased with the increase in pretreatment temperature. XPS indicated that gold in the catalysts was presented in the form of metallic state clusters. Catalytic studies showed these catalysts were very active and stable in low-temperature CO oxidation. The CO oxidation activity of the catalysts increased as the Au particle size decreased. The measurement results of AAS, TPD and H-2-RD revealed that there were some organic fragments on the surface of Au particles which might be responsible for the high stability of the Au/TiO2 catalysts.

引用

页码：49 / 55

页数：7

共 27 条

[1] ENHANCEMENT IN THE OPTICAL CO SENSITIVITY OF NIO FILM BY THE DEPOSITION OF ULTRAFINE GOLD PARTICLES
ANDO, M
KOBAYASHI, T
HARUTA, M
[J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1994, 90 (07): : 1011 - 1013
[2] The influence of the preparation methods on the catalytic activity of platinum and gold supported on TiO2 for CO oxidation
Bamwenda, GR
Tsubota, S
Nakamura, T
Haruta, M
[J]. CATALYSIS LETTERS, 1997, 44 (1-2) : 83 - 87
[3] Selective CO oxidation in a hydrogen-rich stream over Au/γ-Al2O3 catalysts
Bethke, GK
Kung, HH
[J]. APPLIED CATALYSIS A-GENERAL, 2000, 194 : 43 - 53
[4] A kinetic and DRIFTS study of low-temperature carbon monoxide oxidation over Au-TiO2 catalysts
Bollinger, MA
Vannice, MA
[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 1996, 8 (04) : 417 - 443
[5] Catalysis by gold
Bond, GC
Thompson, DT
[J]. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1999, 41 (3-4): : 319 - 388
[6] Beijing: perspectives on preservation, environment, and development
Chang, SD
[J]. CITIES, 1998, 15 (01) : 13 - 25
[7] CO oxidation on supported nano-Au catalysts synthesized from a [Au6(PPh3)6](BF4)2 complex
Choudhary, TV
Sivadinarayana, C
Chusuei, CC
Datye, AK
Fackler, JP
Goodman, DW
[J]. JOURNAL OF CATALYSIS, 2002, 207 (02) : 247 - 255
[8] CATALYTIC BEHAVIOR OF NOBLE-METAL REDUCIBLE OXIDE MATERIALS FOR LOW-TEMPERATURE CO OXIDATION .1. COMPARISON OF CATALYST PERFORMANCE
GARDNER, SD
HOFLUND, GB
SCHRYER, DR
SCHRYER, J
UPCHURCH, BT
KIELIN, EJ
[J]. LANGMUIR, 1991, 7 (10) : 2135 - 2139
[9] GEUS JW, 1993, CATALYSIS INTEGRATED, P335
[10] Selective oxidation of CO over supported Au catalysts
Grisel, RJH
Nieuwenhuys, BE
[J]. JOURNAL OF CATALYSIS, 2001, 199 (01) : 48 - 59

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