Method for using low-temperature plasma to prepare supported metal sulfide catalyst

Abstract

The invention discloses a method for using low-temperature plasma to prepare a supported metal sulfide catalyst and belongs to the technical field of material science. The method is characterized by including: allowing ionization of hydrogen sulfide gas or gas containing hydrogen sulfide through gas discharge to form the low-temperature plasma distributed evenly, and using the low-temperature plasma to interact with supported metal salt precursor to generate metal sulfide. Due to the fact that the catalyst is avoided from being exposed in excessively high temperature, the prepared catalyst is free of thermal agglomeration, so that the catalyst is smaller in particle size and higher in dispersity. The method is suitable for preparation of various sulfide catalysts, metal sulfide can be supported on different materials to prepare various supported catalysts. The method has the advantages of low reaction temperature, low energy consumption, short preparation time and the like. In addition, processing objects are common metal salt, wide involve range is achieved, and the prepared catalyst is applicable to various common heterogeneous reactions.

Description

technical field [0001] The invention belongs to the technical field of material science and relates to a method for preparing a supported metal sulfide catalyst by using low-temperature plasma. technical background [0002] As an important functional material, metal sulfides are widely used in the fields of optics, catalysis and magnetic devices. The current method of preparing supported metal sulfides is to impregnate the carrier with metal salts, followed by roasting (to produce metal oxides) and high-temperature vulcanization. Due to favorable thermodynamic properties and relatively weak H–S bonds, the energy barrier for metal oxide sulfidation is usually small. Although the vulcanization process of metal oxides can be carried out at lower temperatures, the reaction is very slow due to kinetic limitations. Although the higher temperature increases the vulcanization rate, high temperature operation increases the operating cost and also leads to the agglomeration of the a...

AI Technical Summary

Problems solved by technology

Although the vulcanization process of metal oxides can be carried out at lower temperatures, the reaction is very slow due to kinetic limitations

Although a higher temperature increases the vulcanization rate, high temperature operation increases the operating cost and also leads to the agglomeration of the active phase, which leads to an increase in particle size, a decrease in dispersion and lattice defects.

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