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

• Published in: Journal of rare earths Vol. 32; no. 2; pp. 139 - 145
• Main Author: 顾贤睿 李昊 刘礼晨 汤常金 高飞 董林
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2014
• Subjects: CO pretreatment; CuO/CeO2 catalysts; NO reduction; NO还原; oxygen vacancies; rare earths; X-射线光电子能谱; 傅里叶变换红外光谱; 催化剂; 催化还原; 激光拉曼光谱; 预处理; CuO/CeO2 catalysts; CO pretreatment; NO reduction; oxygen vacancies; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(14)60043-0

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℃） 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.