High catalytic activity for CO oxidation of gold nanoparticles confined in acidic support Al-SBA-15 at low temperatures

被引：104
|
作者：
Chiang, CW
Wang, AQ
Wan, BZ
Mou, CY [1 ]
机构：
[1] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 106, Taiwan
[2] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan
[3] Natl Taiwan Univ, Dept Chem Engn, Taipei 106, Taiwan
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 38期
关键词：
D O I：
10.1021/jp052867v
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：
While there is a large number of recent studies of Au nanocatalysts supported on metal oxides, low-temperature CO oxidation under an acidic environment has not yet been accomplished. Over a novel acidic Al-SBA-15 support, uniformly distributed gold nanoparticles with sizes similar to 2.7 nm were obtained by a successive procedure of aminosilane grafting, gold adsorption-reduction, and then high-temperature hydrogen treatment. The catalyst system, Au@Al-SBA-15, exhibits extraordinarily high activity for CO oxidation at 80 degrees C. By varying the Si/Al ratio of the support, the dependence of the catalytic activity on the support Si/Al ratio was found in the CO oxidation reaction.
引用
收藏
页码：18042 / 18047
页数：6
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