双金属
催化作用
苯
选择性催化还原
锰
体积热力学
材料科学
4-硝基苯酚
无机化学
化学
核化学
冶金
有机化学
量子力学
物理
作者
Wenkai Hu,Tao Guo,Kaiyao Ma,Li Xu,Wangting Luo,Mingzhi Wu,Hongchen Guo,Yaxin Zhang,Wenfeng Shangguan
标识
DOI:10.1016/j.jes.2022.10.045
摘要
VOCs can exert great harm to both human and environment, and catalytic oxidation is believed to be an effective technique to eliminate these pollutants. In this paper, Ag-Mn bimetal catalysts with 10 wt.% of silver were synthesized using doping, impregnation, and reduction methods respectively, and then they were applied to the catalytic oxidation of benzene. Through series of characterizations it showed that the loading of silver using reduction method significantly resulted in improved physico-chemical properties of manganese oxides, such as larger surface area and pore volume, higher proportion of surface Mn3+ and Mn4+, stronger reducibility and more active of surface oxygen species, which were all beneficial to its catalytic activity. As a result, the Ag-Mn catalysts synthesized by reduction method showed a lower T90 value (equals to the temperature at which 90% of initial benzene was removed) of 203°C. Besides, both the used and fresh Ag-Mn catalysts synthesized by reduction method showed preferable stability in this research.
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