Promotional effect of CO pretreatment on CuO/CeO2 catalyst for catalytic reduction of NO by CO

被引：44
|
作者：
Gu Xianrui [1 ]
Li Hao [1 ]
Liu Lichen [1 ]
Tang Changjin [1 ]
Gao Fei [1 ,2 ]
Dong Lin [1 ,2 ]
机构：
[1] Nanjing Univ, Sch Chem & Chem Engn, Key Lab Mesoscop Chem, MOE, Nanjing 210093, Jiangsu, Peoples R China
[2] Nanjing Univ, Ctr Modern Anal, Nanjing 210093, Jiangsu, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2014年 / 32卷 / 02期
基金：
中国国家自然科学基金;
关键词：
CuO/CeO2; catalysts; CO pretreatment; oxygen vacancies; NO reduction; rare earths; CARBON-MONOXIDE OXIDATION; PREFERENTIAL OXIDATION; NITRIC-OXIDE; COPPER; CERIA; CU; PERFORMANCE; ADSORPTION;
D O I：
10.1016/S1002-0721(14)60043-0
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The CuO/CeO2 catalysts were investigated by means of X-ray diffraction (XRD), laser Raman spectroscopy (LRS), X-ray photoelectronic spectroscopy (XPS), temperature-programmed reduction (TPR), in situ Fourier transform infrared spectroscopy (FTIR) and NO+CO reaction. The results revealed that the low temperature (<150 degrees C) catalytic performances were enhanced for CO pretreated samples. During CO pretreatment, the surface Cu+/Cu-0 and oxygen vacancies on ceria surface were present. The low valence copper species activated the adsorbed CO and surface oxygen vacancies facilitated the NO dissociation. These effects in turn led to higher activities of CuO/CeO2 for NO reduction. The current study provided helpful understandings of active sites and reaction mechanism in NO+CO reaction.
引用
收藏
页码：139 / 145
页数：7
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