Study on the effect of preparation method on Ag-Cs synergistic system in soot oxidation catalysis.

被引：0
|
作者：
Ruan, Hong-Cheng [1 ]
Zhang, Xue-Ni [1 ]
Huang, Dan [1 ]
Yang, Jun [1 ,2 ]
Li, Hong-Hu [1 ]
Zhuang, Gong-Zu [1 ]
Bai, Quan [1 ]
Guo, Li-Min [3 ]
机构：
[1] School of Information Engineering, Zhongnan University of Economics and Law, Wuhan,430073, China
[2] Institute for Environmental Management and Policy, Zhongnan University of Economics and Law, Wuhan,430073, China
[3] School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan,430074, China
来源：
Zhongguo Huanjing Kexue/China Environmental Science | 2024年 / 44卷 / 07期
关键词：
Binary alloys - Catalytic oxidation - High resolution transmission electron microscopy - Ion exchange - Silver - Silver alloys - Soot - X ray photoelectron spectroscopy;
D O I：
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学科分类号：
摘要：
Bimetallic catalysts Ag-Cs/ZSM-5(E) and Ag-Cs/ZSM-5(D) were synthesized by ion-exchange and impregnation method. The physical and chemical properties of the catalysts were characterized by X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and so on. The catalyst activities were tested by temperature-programmed oxidation (TPO), and the catalytic activities of the bimetallic catalysts Ag-Cs/ZSM-5(E) and Ag-Cs/ZSM-5(D) were found to be significantly enhanced compared with those of Ag/ZSM-5under oxygen atmosphere, the T50 values decreased from 546℃ for Ag/ZSM-5 to 430℃ for Ag-Cs/ZSM-5(E) and 464℃ for Ag-Cs/ZSM-5(D), respectively. Meanwhile, Ag-Cs/ZSM-5(E) exhibited better catalytic activity and stability than Ag-Cs/ZSM-5(D). The results confirmed the synergistic effect of Ag-Cs bimetallic and the key role of Lewis acidic site Cs on ZSM-5 support in the bimetallic synergism. © 2024 Chinese Society for Environmental Sciences. All rights reserved.
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页码：3637 / 3645
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