Effect of Ti3+ on TiO2-Supported Cu Catalysts Used for CO Oxidation

被引：109

作者：

Chen, Ching S. ^{[1
,2
]}

Chen, Tse C.

Chen, Chen C. ^{[1
,2
]}

Lai, Yuan T. ^{[1
,2
]}

You, Jiann H. ^{[3
]}

Chou, Te M. ^{[1
,2
,3
]}

Chen, Ching H. ^{[1
,2
]}

Lee, Jyh-Fu

机构：

[1] Chang Gung Univ, Ctr Gen Educ, Kwei Shan Tao Yuan 333, Taiwan

[2] Chang Gung Univ, Dept Chem & Mat Engn, Kwei Shan Tao Yuan 333, Taiwan

[3] Natl Synchrotron Radiat Res Ctr, Hsinchu 300, Taiwan

来源：

LANGMUIR | 2012年 / 28卷 / 26期

关键词：

CARBON-MONOXIDE OXIDATION; COPPER-OXIDE CATALYSTS; GAS SHIFT REACTION; ACTIVE-SITES; OXYGEN VACANCIES; METALLIC COPPER; DOPED TIO2; IN-SITU; SURFACE; CU/SIO2;

D O I：

10.1021/la301684h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, we have shown that Cu/TiO2 catalysts are highly active in CO oxidation. For instance, a 3.4% Cu/TiO2 catalyst exhibits a higher turnover rate for the effective removal of CO in air than 3-5% Pt/TiO2 and 20% Cu/ZnO/Al2O3 catalysts. A small amount of Cu+ species is formed during the calcination treatment at 225 degrees C, which is the main active phase for the CO oxidation. However, it is proposed that some highly dispersed CuO can also form in the TiO2 lattice during the calcination treatment. Furthermore, a strong electron interaction between Cu2+ in highly dispersed CuO and Ti3+ on rutile TiO2 (Cu2++Ti3+-> Cu++Ti4+) has been shown to occur. Overall, the reduction of Cu+ is a major factor that contributes to the reaction rate of the CO oxidation.

引用

页码：9996 / 10006

页数：11

共 57 条

[11] CU/SiO2 catalysts prepared by the ammonia-evaporation method:: Texture, structure, and catalytic performance in hydrogenation of dimethyl oxalate to ethylene glycol [J].