Small gold particles supported on MgFe2O4 nanocrystals as novel catalyst for CO oxidation

被引：33

作者：

Jia, Chun-Jiang ^{[1
]}

Liu, Yong ^{[1
]}

Schwickardi, Manfred ^{[1
]}

Weidenthaler, Claudia ^{[1
]}

Spliethoff, Bernd ^{[1
]}

Schmidt, Wolfgang ^{[1
]}

Schueth, Ferdi ^{[1
]}

机构：

[1] Max Planck Inst Kohlenforsch, D-45470 Mulheim, Germany

来源：

APPLIED CATALYSIS A-GENERAL | 2010年 / 386卷 / 1-2期

关键词：

Supported gold catalyst; MgFe2O4; CO oxidation; Pretreatment atmosphere; Active oxygen; LOW-TEMPERATURE OXIDATION; DEACTIVATION; PRETREATMENT; PERFORMANCE; AU/TIO2; OXIDE; TIO2; GAS; HYDROXYAPATITE; NANOPARTICLES;

D O I：

10.1016/j.apcata.2010.07.036

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：

We present the study on the catalytic performance of gold particles supported on spinet type MgFe2O4 nanocrystals (Au/MgFe2O4) which exhibit high activity for low temperature CO oxidation. Using XRD, TEM. XPS and CO titration techniques, we investigated the effect of the pretreatment atmosphere on the structure and catalytic properties of the Au/MgFe2O4 catalyst in CO oxidation. TEM. XPS and XRD showed that the pretreatment atmosphere had a negligible effect on the particle size distribution, chemical states of the gold, and the structure of the support. Among the various pretreated catalysts, O-2-Au/MgFe2O4 exhibits superior activity, indicating that pretreatment in oxidative atmosphere induced the high capability of the catalyst to activate CO and supply active oxygen for CO oxidation as confirmed by CO titration experiments. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.

引用

页码：94 / 100

页数：7