Preparation and catalytic activity of nano-scale Au islands supported on TiO2

被引：22

作者：

Takaoka, GH ^{[1
]}

Hamano, T ^{[1
]}

Fukushima, K ^{[1
]}

Matsuo, J ^{[1
]}

Yamada, I ^{[1
]}

机构：

[1] SETSUNAN UNIV, FAC ENGN, NEYAGAWA, OSAKA 572, JAPAN

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1997年 / 121卷 / 1-4期

关键词：

D O I：

10.1016/S0168-583X(96)00397-7

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Titania-supported gold catalysts (Au/TiO2) prepared by the ionized cluster beam (ICE) method have been studied by STM, TEM, X-ray diffraction and assessed for their catalytic activity with the oxidation of CO. The temperature dependence of the CO oxidation for Au/TiO2 catalysts indicated that the catalytic activity was enhanced both by using anatase type of TiO2 supports and by depositing Au at an accelerating potential of 3 kV. For CO oxidation, O-2 molecules, absorbed on the TiO2 supports, migrate and react with CO molecules at the edge of the nano-scale Au islands. The enhancement of CO oxidation is due to the increase of absorption and migration for these O-2 and CO molecules. Thus, high activity of Au/TiO2 catalysts with good thermal stability can be obtained.

引用

页码：503 / 506

页数：4

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