Preparation method of high-current-density water electrolysis hydrogen production catalyst

Abstract

The invention discloses a preparation method of a high-current-density water electrolysis hydrogen production catalyst, which comprises the following steps: mixing solid organic amine, metal and nanocarbon to obtain a mixture, and carrying out ball milling to obtain a ball-milled mixture; and pyrolyzing the mixture in a nitrogen atmosphere, catalyzing the solid organic amine to decompose by the metal, and'welding 'the metal and the nano carbon in situ to obtain the catalyst for hydrogen production by water decomposition. Wherein the thermal decomposition temperature ranges from 300 DEG C to 650 DEG C, and the thermal decomposition time ranges from 10 min to 24 h. In the prepared catalyst, the metal active component nanoparticles are welded on the outer surface of the carbon nanotube through the nitrogen-doped graphene obtained through metal catalytic solid organic amine decomposition, the size of the metal active component nanoparticles and the dispersity of the metal active component nanoparticles on the surface of the carbon nanotube are easy to control, and the water electrolysis hydrogen production activity and efficiency of the catalyst are improved; and the hydrogen production energy consumption is reduced.

Description

technical field [0001] The invention belongs to the field of catalysis for hydrogen production by electrolysis of water, and in particular relates to a preparation method of a catalyst for hydrogen production by electrolysis of water with high current density. Background technique [0002] With the continuous use of fossil energy and the continuous increase of carbon emissions, the global energy supply and human living environment are facing unprecedented challenges. In order to improve the environment and alleviate the energy crisis, there is an urgent need for clean and sustainable energy. Among the currently developed clean and sustainable new energy sources, hydrogen energy has received special attention and research. Hydrogen energy has the advantages of high reserves, high calorific value, good combustion performance, zero emissions, multiple utilization forms, and high energy conversion efficiency. At present, fossil fuel hydrogen production technology is relatively...

AI Technical Summary

Problems solved by technology

[0003] However, the biggest problem and difficulty in electrolyzing water to produce hydrogen at present is that the electrolysis efficiency is low (the current density is less than 1000mA / cm 2 ), high energy consumption (overvoltage greater than 0.5V), the main reason is that the electrolytic hydrogen production electrode catalytic hydrogen production effect is still not good

[0004] At present, it is difficult to control the size and dispersion of the active components in the catalyst preparation method, which makes the catalyst activity low and increases the cost of the catalyst. Therefore, it is necessary to develop a new preparation method for improving the size and dispersion of the catalyst active components, and then Improve the activity of the catalyst, ultimately improve the efficiency of hydrogen production by splitting water, and reduce its energy consumption

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