Novel synthesis and shape-dependent catalytic performance of Cu-Mn oxides for CO oxidation

作者：Li, Zhixun; Wang, Honglei; Wu, Xingxing; Ye, Qinglan; Xu, Xuetang^*; Li, Bin; Wang, Fan

来源：Applied Surface Science, 2017, 403: 335-341.

DOI：10.1016/j.apsusc.2017.01.169

• Low-temperature coprecipitation
• Cu-Mn oxides
• Catalysis
• Porous structure

Transition metal oxides with large specific surface area are attractive for high-activity catalysts, and hierarchical structures of transition metal oxides with porous feature possess the structural advantage in the transfer of gaseous reactant and product. In this work, porous Cu-Mn oxides with high surface area were successfully obtained through low-temperature coprecipitation method in alcohol/water solvent and then post-annealing. The addition of alcohol showed great influences on the shape and catalytic performances for CO oxidation. Dumbbell-like Cu-Mn oxide particles with splitting ends displayed high catalytic activity and a complete conversion of CO was achieved at 45 degrees C, suggesting a shape-dependent catalytic activity. The oxidative activity was attributed to a combination of factors including specific surface area, active surface oxygen species and Mn(IV) cations. The results may supply a new thought to design high-performance Cu-Mn oxide catalysts.

• 出版日期2017-5-1
• 单位广西大学