标题：Change of Cu+species and synergistic effect of copper and cerium during reduction-oxidation treatment for preferential CO oxidation
作者：Zhang, Hao ;Zhao, Xiaozhou ;Wang, Shuang ;Zeng, Shanghong ;Su, Haiquan
作者机构：[Zhang, Hao ;Zhao, Xiaozhou ;Wang, Shuang ;Zeng, Shanghong ;Su, Haiquan ] Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materia 更多
来源：Applied Surface Science
摘要：The CuO-CeO2@SiO2catalyst with flower-sphere morphology was prepared by the impregnation method and then experienced the reduction-oxidation treatment at different temperatures. The multi-technique characterization shows that the reduction-oxidation treatment can remodel CuO, improve textural and surface properties and change Cu+content and synergistic effect of copper and cerium. The importance of this work lies in the fact that the decrease of Cu+content and synergistic effect of copper and cerium that occurs in the reduction-oxidation process results in the decrease of catalytic activity over the CuO-CeO2@SiO2catalyst for preferential CO oxidation. The process of reaction in rich-hydrogen streams is equivalent to a reduction procedure which decreases Cu+content and synergistic effect of copper and cerium.
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