Selective oxidation of CO in the presence of air over gold-based catalysts Au/TiO2/C (sonochemistry) and Au/TiO2/C (microwave)

被引：13

作者：

George, P. P. ^{[1
]}

Gedanken, A. ^{[1
]}

Perkas, N. ^{[1
]}

Zhong, Z. ^{[2
]}

机构：

[1] Bar Ilan Univ, Dept Chem, Ctr Adv Mat & Nanotechnol, Kanbar Lab Nanomat, IL-52900 Ramat Gan, Israel

[2] Inst Chem & Engn Sci, Singapore 627833, Singapore

来源：

ULTRASONICS SONOCHEMISTRY | 2008年 / 15卷 / 04期

关键词：

gold catalysis; model catalyst; CO oxidation; sonochemistry; microwave;

D O I：

10.1016/j.ultsonch.2007.06.006

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Two model catalysts, Au/TiO2/C (S) (sonochemically derived) and Au/TiO2/C (M) (microwave derived), were produced by employing ultrasound irradiation and microwave irradiation, respectively. The deposition of gold colloids onto the support powders, TiO2/C, was accomplished by using a solvated metal atom impregnation (SMAI) method. The SMAI technique provides highly-dispersed gold particles on the TiO2/C support. The catalytic performance of Au based catalysts 1 wt% Au-TiO2/C (S) and 1 Au-TiO2(M)/C (M) have been tested for the oxidation of CO in the temperature range of 0-300 degrees C and compared to that of 1 wt% Au-TiO2 (Degussa-P25). A boost in the conversion of CO was observed for the sonochemically-derived catalyst, Au/TiO2/C (S), at low temperature. Hence, the reactivity order found for CO oxidation is (Au/TiO2/C (S) > Au/TiO2 (P25) > Au/TiO2/C (M)), (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：539 / 547

页数：9

共 38 条

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