Preparation of supported gold catalysts by gas-phase grafting of gold acethylacetonate for low-temperature oxidation of CO and of H2

被引:163
作者
Okumura, M
Tsubota, S
Haruta, M
机构
[1] AIST Kansai, Natl Inst Adv Ind Sci & Technol, Ikeda, Osaka 5638577, Japan
[2] AIST Tsukuba W, Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058569, Japan
关键词
Au catalyst; gas-phase grafting method; CO oxidation; size effect; support effect;
D O I
10.1016/S1381-1169(03)00020-7
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
In order to clarify the support effect on CO oxidation over Au catalysts without the influence of the size effect of Au, An Was deposited on a variety of supports with high dispersion by gas-phase grafting (GG) of an organo-gold complex. Comparison of Au/SiO2 with Au/Al2O3 and Au/TiO2, which were prepared by both GG and liquid-phase methods and were active for CO oxidation at 273 K, showed that there were no appreciable differences in their catalytic activities as far as Au. is deposited as nanoparticles with strong interaction. However, Au deposited onto the acidic supports, such as silica-alumina and activated carbon (AC), exhibited a much lower CO oxidation catalytic activity than those of the active Au catalysts, such as Au/TiO2. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:73 / 84
页数:12
相关论文
共 22 条
[21]   Preparation of supported gold catalysts from gold complexes and their catalytic activities for CO oxidation [J].
Yuan, YZ ;
Asakura, K ;
Wan, HL ;
Tsai, K ;
Iwasawa, Y .
CATALYSIS LETTERS, 1996, 42 (1-2) :15-20
[22]   Supported gold catalysts derived from gold complexes and as-precipitated metal hydroxides, highly active for low-temperature CO oxidation [J].
Yuan, YZ ;
Asakura, K ;
Wan, HL ;
Tsai, KR ;
Iwasawa, Y .
CHEMISTRY LETTERS, 1996, (09) :755-756