Adsorption of CO on gold supported on TiO2

被引：126

作者：

Iizuka, Y ^{[1
]}

Fujiki, H ^{[1
]}

Yamauchi, N ^{[1
]}

Chijiiwa, T ^{[1
]}

Arai, S ^{[1
]}

Tsubota, S ^{[1
]}

Haruta, M ^{[1
]}

机构：

[1] OSAKA NATL RES INST,AIST,IKEDA,OSAKA 563,JAPAN

来源：

CATALYSIS TODAY | 1997年 / 36卷 / 01期

关键词：

CO adsorption; gold catalyst; TiO2; support; CO2; production;

D O I：

10.1016/S0920-5861(96)00204-0

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The adsorption of CO on TiO2 supported gold has been investigated both under a constant pressure static system and under a closed recirculation system with liquid nitrogen cooled trap. Au/TiO2 with 3.3 wt% loading and 3.5 nm mean particle diameter of Au was prepared by deposition-precipitation. Adsorption of CO on Au/TiO2 was 90% reversible and satisfied the Langmuir isotherm. The amount of CO2 produced during CO adsorption agreed well with the amount of irreversible CO adsorption. TiO2 powder produced only 1/185th the amount of CO2 at 273 K compared to gold powder, even though the amount of CO adsorbed per unit surface area was similar to that of gold powder. The results indicate that a reaction between oxygen adsorbed on the surface of small gold particles with CO is one of the major reaction pathways in forming CO2.

引用

页码：115 / 123

页数：9

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