Synthesis method of tungsten nitride with high catalytic performance

Abstract

The invention discloses a method for preparing nano tungsten nitride, belonging to the technical field of powder metallurgy preparation. The method comprises the following steps: synthesizing and preparing a tungsten oxide precursor through a solution method; and nitriding the tungsten oxide precursor in ammonia gas to obtain nanocrystalline tungsten nitride powder, wherein the particle size of the powder is 30-120nm. By virtue of the method disclosed by the invention, the problems that ultrafine nanocrystalline powder can be difficultly prepared by a traditional preparation method and the preparation time is long in the traditional preparation method can be solved. The tungsten nitride powder prepared by using the method disclosed by the invention is controllable in particle size, low in cost and high in utilization rate of raw material powder and has remarkable catalytic performance.

Description

technical field

[0001] The invention belongs to the technical field of powder metallurgy preparation, and particularly provides a preparation method of nanocrystalline tungsten nitride powder. Background technique

[0002] The refractory metal tungsten not only has excellent performance as a single substance, but also its compounds tungsten oxide, tungsten sulfide, and tungsten nitride are also widely used. Among them, tungsten nitride is a new type of catalytic material, which has better performance than sulfide catalysts in hydrodesulfurization and hydrodenitrogenation. The hydrogenolysis of the ring has high selectivity, which can greatly reduce the hydrogen consumption in the process, and has great industrial significance. These processes traditionally use noble metals as catalysts. Thus, the desire to use nitrides instead of noble metals has driven research into the synthesis and catalysis of such catalysts.

[0003] At the same time, the current research shows that ...

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