Total oxidation of CO at ambient temperature using copper manganese oxide catalysts prepared by a redox method

被引:161
作者
Njagi, Eric C. [2 ]
Chen, Chun-Hu [2 ]
Genuino, Homer [2 ]
Galindo, Hugo [2 ]
Huang, Hui [2 ]
Suib, Steven L. [1 ,2 ,3 ]
机构
[1] Univ Connecticut, Dept Chem Engn, Storrs, CT 06269 USA
[2] Univ Connecticut, Dept Chem, Storrs, CT 06269 USA
[3] Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA
关键词
Amorphous manganese oxide; Copper manganese oxides; Hopcalite; Ambient temperature CO oxidation; Water poisoning; CARBON-MONOXIDE OXIDATION; PERFORMANCE; MECHANISM; KINETICS; HYDROGEN; MOISTURE; BEHAVIOR; MNO2; XPS;
D O I
10.1016/j.apcatb.2010.06.006
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
Binary copper manganese oxides were prepared by a novel redox method and their catalytic activity for CO oxidation at ambient temperature evaluated. The catalytic activity was found to be high, and compared favorably with a commercial Hopcalite catalyst. The most active catalyst was able to completely oxidize CO at ambient temperature. Catalytic activity decay, most likely due to carbon dioxide retention was observed. The catalysts were deactivated by moisture but expelling water at moderate temperatures easily restored their catalytic activity. The catalysts were characterized by means of BET, FE-SEM, TEM, EDAX, XPS, TPD and X-ray powder diffraction. The optimum copper loading was determined to be similar to 9% of the manganese content. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:103 / 110
页数:8
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