CO Oxidation Activity of a Au/Ceria-Zirconia Catalyst Prepared by Deposition-Precipitation with Urea

被引：17

作者：

del Rio, Eloy ^{[1
]}

Blanco, Ginesa ^{[1
]}

Collins, Sebastian ^{[2
]}

Lopez Haro, Miguel ^{[1
]}

Chen, Xiaowei ^{[1
]}

Jose Delgado, Juan ^{[1
]}

Calvino, Jose J. ^{[1
]}

Bernal, Serafin ^{[1
]}

机构：

[1] Univ Cadiz, Fac Ciencias, Dept Ciencia Mat & Ingn Met & Quim Inorgan, Cadiz 11510, Spain

[2] CONICET UNL, Inst Desarrollo Tecnol Ind Quim INTEC, RA-3450 Guemes, Santa Fe, Argentina

来源：

TOPICS IN CATALYSIS | 2011年 / 54卷 / 13-15期

关键词：

Au/CeZrO2; Urea deposition/precipitation; Activation; CO oxidation; LOW-TEMPERATURE OXIDATION; PRETREATMENT CONDITIONS; OXIDE CATALYSTS; GOLD CATALYSTS; NANOPARTICLES; WATER; GAS; MECHANISM; TIO2; AU/CE1-XZRXO2;

D O I：

10.1007/s11244-011-9711-0

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The activation of a 2.6 wt% Au/Ce0.62Zr0.38O2 catalyst prepared by deposition-precipitation with urea is investigated. At 298 K, the activity for CO oxidation of the as-prepared sample is very low; it is significantly increased when heated at 418 K, under the reaction mixture, and much strongly when pre-treated under flowing O-2(5%)/He, at 523 K. As revealed by XPS, FTIRS, HAADF-STEM, and HRTEM studies, the activation process consists of the transformation of the initial urea-containing Au(III) precursor deposited on the support into a highly dispersed metal phase (Au nano-particle mean size: 1.8 nm).

引用

页码：931 / 940

页数：10

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