Study on the effect of preparation method on Ag-Cs synergistic system in soot oxidation catalysis
RUAN Hong-cheng1, ZHANG Xue-ni1, HUANG Dan1, YANG Jun1,2, LI Hong-hu1, ZHUANG Gong-zu1, BAI Quan1, GUO Li-min3
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
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.
阮宏程, 张雪妮, 黄丹, 杨俊, 李鸿鹄, 庄龚祖, 白泉, 郭利民. 制备方法对碳烟催化中Ag-Cs协同体系影响研究[J]. 中国环境科学, 2024, 44(7): 3637-3645.
RUAN Hong-cheng, ZHANG Xue-ni, HUANG Dan, YANG Jun, LI Hong-hu, ZHUANG Gong-zu, BAI Quan, GUO Li-min. Study on the effect of preparation method on Ag-Cs synergistic system in soot oxidation catalysis. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(7): 3637-3645.
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