Abstract: Atmospheric hydrogen plasma (AHP) has been generally used in the preparation of supported noble metal catalytic materials. In this paper, Ru/UiO-66 catalyst was prepared by atmospheric pressure hydrogen plasma, and compared the structural and performance characteristics with the sample prepared by the traditional hydrogen thermal reduction method. The results of X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 adsorption-desorption isotherm, X-ray photoelectron spectroscopy (XPS) and transmission electron microscope (TEM) showed that both atmospheric pressure hydrogen plasma method and traditional hydrogen thermal reduction method can maintain the crystal structure, morphology, specific surface area and pore structure of porous material UiO-66. The particle size of Ru in the sample prepared by the hydrogen plasma system is smaller than that of thermal reduction method. It is noteworthy that the Ru/UiO-66 prepared by the two methods has similar catalytic activity, and the CO2 conversion can reach more than 70% under the plasma assisted in the CO2 methanation reaction, and the CH4 selectivity is more than 90%. It indicates that atmospheric pressure hydrogen plasma reduction technology can replace traditional thermal reduction to prepare the supported Ru/UiO-66 catalytic material with ultrafine metal particles. It can also save the long and tedious time of heating and cooling, and short the period of material treatment effectively.
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2020, Vol. 34 
