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

稀土学报(英文版), 2014, (2): 139-145. doi: 10.1016/S1002-0721(14)60043-0

顾贤睿 ^1, , 李昊 ^2, , 刘礼晨 ^3, , 汤常金 ^4, , 高飞 ^5, , 董林 ^6,

1.Key Laboratory of Mesoscopic Chemistry of M0E, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

2.Key Laboratory of Mesoscopic Chemistry of M0E, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

3.Key Laboratory of Mesoscopic Chemistry of M0E, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

4.Key Laboratory of Mesoscopic Chemistry of M0E, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

5.Key Laboratory of Mesoscopic Chemistry of M0E, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

6.Key Laboratory of Mesoscopic Chemistry of M0E, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

基金项目: National Natural Science Foundation of China(21273110,20973091) National Basic Research Program of China(2010CB732300) Natural Science Foundation for the Youth(21203091)

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

GU Xianrui ^1, , LI Hao ^2, , LIU Lichen ^3, , TANG Changjin ^4, , GAO Fei ^5, , DONG Lin ^6,

1.Key Laboratory of Mesoscopic Chemistry of M0E, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

2.Key Laboratory of Mesoscopic Chemistry of M0E, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

3.Key Laboratory of Mesoscopic Chemistry of M0E, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

4.Key Laboratory of Mesoscopic Chemistry of M0E, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

5.Key Laboratory of Mesoscopic Chemistry of M0E, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

6.Key Laboratory of Mesoscopic Chemistry of M0E, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

Keywords： CuO/CeO2 catalysts

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 °C) catalytic performances were enhanced for CO pretreated samples. During CO pretreatment, the surface Cu+/Cu0 and oxygen vacancies on ceria surface were present. The low va-lence 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.

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

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