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

页码：18042 / 18047

页数：6

共 27 条

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