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Characterization and Catalytic Activity of Mn-Co/TiO2 Catalysts for NO Oxidation to NO2 at Low Temperature

被引：35
|
作者：
Qiu, Lu [1 ]
Wang, Yun [1 ]
Pang, Dandan [1 ]
Ouyang, Feng [1 ]
Zhang, Changliang [1 ]
Cao, Gang [1 ]
机构：
[1] Harbin Inst Technol, Shenzhen Grad Sch, Environm Sci & Engn Res Ctr, Shenzhen 518055, Peoples R China
来源：
CATALYSTS | 2016年 / 6卷 / 01期
关键词：
NO Oxidation; NO2; mixed oxides; manganese; cobalt; interaction; PEROVSKITE-TYPE OXIDES; SELECTIVE REDUCTION; SUPERIOR CATALYST; METAL OXIDES; COBALT; SCR; CO; STORAGE; OXYGEN; NH3;
D O I：
10.3390/catal6010009
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：
A series of Mn-Co/TiO2 catalysts were prepared by wet impregnation method and evaluated for the oxidation of NO to NO2. The effects of Co amounts and calcination temperature on NO oxidation were investigated in detail. The catalytic oxidation ability in the temperature range of 403-473 K was obviously improved by doping cobalt into Mn/TiO2. These samples were characterized by nitrogen adsorption-desorption, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM) and hydrogen temperature programmed reduction (H-2-TPR). The results indicated that the formation of dispersed Co3O4CoMnO3 mixed oxides through synergistic interaction between Mn-O and Co-O was directly responsible for the enhanced activities towards NO oxidation at low temperatures. Doping of Co enhanced Mn4+ formation and increased chemical adsorbed oxygen amounts, which also accelerated NO oxidation.
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页数：12
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