制备方法对碳烟催化中Ag-Cs协同体系影响研究

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Abstract 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.

Key words： soot silver-based catalyst bimetallic synergism synthesis method

Received: 04 December 2023

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X701

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	Articles by authors
	RUAN Hong-cheng
	ZHANG Xue-ni
	HUANG Dan
	YANG Jun
	LI Hong-hu
	ZHUANG Gong-zu
	BAI Quan
	GUO Li-min

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RUAN Hong-cheng,ZHANG Xue-ni,HUANG Dan等. Study on the effect of preparation method on Ag-Cs synergistic system in soot oxidation catalysis[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(7): 3637-3645.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I7/3637

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