Ir/CeO2 Catalysts: Characterization and Performance for CO Oxidation

被引：0

作者：

Hu Pan-Jing ^{[1
]}

Wu Yan-Ni ^{[1
]}

Zheng Hai-Ying ^{[1
]}

Meng Lian ^{[1
]}

Jin Ling-Yun ^{[1
]}

Luo Meng-Fei ^{[1
]}

机构：

[1] Zhejiang Normal Univ, Zhejiang Key Lab React Chem Solid Surfaces, Inst Phys Chem, Jinhua 321004, Zhejiang, Peoples R China

来源：

CHINESE JOURNAL OF INORGANIC CHEMISTRY | 2011年 / 27卷 / 12期

关键词：

Ir/CeO2; catalysts; CO oxidation; turnover frequency (TOF); SUPPORTED CATALYSTS; CERIA; RAMAN;

D O I：

暂无

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of Ir/CeO2 catalysts were prepared by an impregnation method, and were tested for CO oxidation. It was found that the activity of Ir/CeO2 catalysts for CO catalytic oxidation rose first and then declined with Ir loading. The catalysts showed the highest activity when Ir content was 1%. Ir existed in the form of IrO2 in the Ir/CeO2 catalysts. IrO2 was highly dispersed with low Ir loading (<= 1%), and existed as crystalline phase with high Ir loading (>1%). Ir particle size increased gradually with Ir loading, but specific rate and turnover frequency (TOE) declined gradually. It indicated that the catalyst with small particle size had a higher CO reactivity. It was also found that for CO oxidation, the activity of Ir catalyst with metal state was higher than that with oxidation state.

引用

页码：2389 / 2394

页数：6

共 19 条

[1] Monopropellant decomposition catalysts II.: Sintering studies on Ir/Al2O3 catalysts, influence of chloride anions [J].