Promotional effect of CO pretreatment on CuO/CeO2 catalyst for catalytic reduction of NO by CO
来源期刊：JOURNAL OF RARE EARTHS2014年第2期
论文作者：顾贤睿 李昊 刘礼晨 汤常金 高飞 董林
文章页码：139 - 145
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 °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 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.
顾贤睿1，李昊1，刘礼晨1，汤常金1，高飞1,2，董林1,2
1. Key Laboratory of Mesoscopic Chemistry of MOE,School of Chemistry and Chemical Engineering,Nanjing University2. Center of Modern Analysis,Nanjing University
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 °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 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.
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