Rational design of gold catalysts with enhanced thermal stability:: post modification of Au/TiO2 by amorphous SiO2 decoration

被引：61

作者：

Zhu, Haoguo ^{[1
]}

Ma, Zhen ^{[1
]}

Overbury, Steven H. ^{[1
]}

Dai, Sheng ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Div Chem Sci, Oak Ridge, TN 37831 USA

来源：

CATALYSIS LETTERS | 2007年 / 116卷 / 3-4期

关键词：

gold nanoparticles; CO oxidation; promotion; sintering; alkoxysilanes; post decoration;

D O I：

10.1007/s10562-007-9144-3

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：

Au/TiO2 is highly active for CO oxidation, but it often suffers from sintering in high-temperature environments. In this work, we report on a novel design of gold catalysts, in which pre-formed Au/TiO2 catalysts were post decorated by amorphous SiO2 to suppress the agglomeration of gold particles. Even after being aged in O-2-He at 700 degrees C, the SiO2-decorated Au/TiO2 was still active for CO oxidation at ambient temperature.

引用

页码：128 / 135

页数：8

共 63 条

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