A carbon-based molybdenum carbide composite material and its preparation method

Abstract

The invention discloses a carbon-based molybdenum carbide composite material and a preparation method thereof. According to the carbon-based molybdenum carbide composite material, red dates and molybdate are utilized as raw materials. When the carbon-based molybdenum carbide composite material disclosed by the invention is prepared, the surfaces of the red dates are cleaned, and the red dates areput into an oven to be dried; then the molybdate and the red dates are put into deionized water together to be stirred, then ultrasound is utilized to make the red dates and the molybdate be completely and evenly mixed, the red dates and the molybdate are put into a reaction kettle after being evenly mixed, and then the reaction kettle is put under the temperature of 200 DEG C to react for 24 to 48h; suction filtration and impurity elimination are performed after reaction finishes, a product is put into a refrigerator to be frozen, and then the product is put into a freeze drying machine to befreeze-dried; the product is put into a tubular furnace after complete freeze drying to perform high temperature annealing treatment, the treatment is performed under the protection of argon or helium, the tubular furnace is firstly heated at a speed of 2 DEG C / min until being heated to 750 to 850 DEG C, then the tubular furnace is thermally insulated for 3 hours, finally the tubular furnace is cooled to room temperature, and the product can be obtained after complete cooling. The preparation method disclosed by the invention has the advantages of simple preparation process, convenience in operation and strong controllability, and the final obtained carbon-based molybdenum carbide has better catalytic performance.

Description

technical field [0001] The invention relates to the field of catalytic materials, in particular to a carbon-based molybdenum carbide composite material and a preparation method thereof. Background technique [0002] In today's society, the energy crisis and environmental pollution have become increasingly severe, threatening the survival and development of human beings. Hydrogen energy is a very important energy source. Due to its high energy density and environmental friendliness, hydrogen is considered to be an ideal energy carrier for sustainable energy storage and a substitute for fossil fuels. At present, the production of hydrogen depends on the fossil fuel industry, so it also faces many problems, such as low purity of hydrogen and high cost; and the use of electric current to split water to produce hydrogen and oxygen is a very effective method of hydrogen production, and the production cost is relatively low. Low, the purity of the hydrogen produced is high. [00...

AI Technical Summary

Problems solved by technology

Among them, noble metals exhibit extremely excellent catalytic activity. For example, Pt / C is currently recognized as the best hydrogen production catalyst for electrolysis of water. However, noble metals cannot be widely promoted due to their limited content and high cost. They are really used in real life production.

Molybdenum carbide is considered to be an efficient catalyst that can be used to replace Pt / C. It is widely used in the fields of electrolysis of water for hydrogen production and hydrodesulfurization. However, the traditional method of synthesizing molybdenum carbide requires complex processes and is still expensive.

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