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
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
收藏
页码:94 / 100
页数:7
相关论文
共 41 条
[1]   Insights into activation, deactivation and hydrogen-induced promotion of a Au/TiO2 reference catalyst in CO oxidation [J].
Azar, M ;
Caps, V ;
Morfin, F ;
Rousset, JL ;
Piednoir, A ;
Bertolini, JC ;
Piccolo, L .
JOURNAL OF CATALYSIS, 2006, 239 (02) :307-312
[2]   Catalysis by gold [J].
Bond, GC ;
Thompson, DT .
CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1999, 41 (3-4) :319-388
[3]   Nanocrystalline CeO2 increases the activity of an for CO oxidation by two orders of magnitude [J].
Carrettin, S ;
Concepción, P ;
Corma, A ;
Nieto, JML ;
Puntes, VF .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2004, 43 (19) :2538-2540
[4]   Support effect in high activity gold catalysts for CO oxidation [J].
Comotti, M ;
Li, WC ;
Spliethoff, B ;
Schüth, F .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (03) :917-924
[5]   Comparison of gold supported catalysts obtained by using different allotropic forms of titanium dioxide [J].
Comotti, Massimiliano ;
Weidenthaler, Claudia ;
Li, Wen-Cui ;
Schueth, Ferdi .
TOPICS IN CATALYSIS, 2007, 44 (1-2) :275-284
[6]   Stability and deactivation of unconditioned Au/Tio2 catalysts during CO oxidation in a near-stoichiometric and O2-rich reaction atmosphere [J].
Denkwitz, Y. ;
Zhao, Z. ;
Hoermann, U. ;
Kaiser, U. ;
Plzak, V. ;
Behm, R. J. .
JOURNAL OF CATALYSIS, 2007, 251 (02) :363-373
[7]   CATALYTIC BEHAVIOR OF NOBLE-METAL REDUCIBLE OXIDE MATERIALS FOR LOW-TEMPERATURE CO OXIDATION .2. SURFACE CHARACTERIZATION OF AU/MNOX [J].
GARDNER, SD ;
HOFLUND, GB ;
DAVIDSON, MR ;
LAITINEN, HA ;
SCHRYER, DR ;
UPCHURCH, BT .
LANGMUIR, 1991, 7 (10) :2140-2145
[8]   COMPARISON OF THE PERFORMANCE-CHARACTERISTICS OF PT/SNOX AND AU/MNOX CATALYSTS FOR LOW-TEMPERATURE CO OXIDATION [J].
GARDNER, SD ;
HOFLUND, GB ;
UPCHURCH, BT ;
SCHRYER, DR ;
KIELIN, EJ ;
SCHRYER, J .
JOURNAL OF CATALYSIS, 1991, 129 (01) :114-120
[9]   Preparation of supported gold catalysts for low-temperature CO oxidation via "size-controlled" gold colloids [J].
Grunwaldt, JD ;
Kiener, C ;
Wögerbauer, C ;
Baiker, A .
JOURNAL OF CATALYSIS, 1999, 181 (02) :223-232
[10]  
GRUNWALDT JD, 2002, Patent No. 1209121