Structure Activity Relationships of Silica Supported AuCu and AuCuPd Alloy Catalysts for the Oxidation of CO

被引：17

作者：

Bauer, J. Chris ^{[1
]}

Mullins, David R. ^{[1
]}

Oyola, Yatsandra ^{[1
]}

Overbury, Steven H. ^{[1
,2
]}

Dai, Sheng ^{[1
,2
,3
]}

机构：

[1] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA

[2] Ctr Nanophase Mat Sci, Oak Ridge, TN USA

[3] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

来源：

CATALYSIS LETTERS | 2013年 / 143卷 / 09期

关键词：

Heterogeneous catalysis; EXAFS; XRD; Nanoparticles; CO oxidation; RAY-ABSORPTION SPECTROSCOPY; GOLD-COPPER NANOPARTICLES; OXYGEN REDUCTION REACTION; LOW-TEMPERATURE OXIDATION; SOLVENT-FREE OXIDATION; NANOCRYSTALS; CLUSTERS; SITES; ADSORPTION; KINETICS;

D O I：

10.1007/s10562-013-1075-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Supported AuCu and AuCuPd catalysts were synthesized through the diffusion of Pd and Cu into Au nanoparticle seeds. When supported on SiO2, the AuCuPd nanoparticles were found to be the most active for the oxidation of CO after being exposed to reductive pretreatment conditions as opposed to oxidative pretreatment conditions. In contrast, AuCu/SiO2 was found to be more active for CO oxidation after the alloy phase was segregated into a Au-CuOx heterostructure. In situ XRD and EXAFS were used to monitor the structural changes of AuCu and AuCuPd catalysts as they were subjected to different pretreatment conditions.

引用

页码：926 / 935

页数：10

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