Catalyst for water electrolysis hydrogen production system and preparation method thereof

Abstract

The invention relates to the field of water electrolysis, and particularly discloses a catalyst for a water electrolysis hydrogen production system and a preparation method of the catalyst. The preparation method of the catalyst for the water electrolysis hydrogen production system comprises the following steps: S1, preparing a porous carbon material; s2, performing surface modification on the porous carbon material by using a coupling agent; s3, mixing gamma-manganese dioxide, cobalt nitrate and nickel nitrate, adding absolute ethyl alcohol to form a mixed solution, adding the porous carbon material, carrying out hydrothermal reaction, adding a sulfur-containing compound solution, uniformly mixing, filtering, adding into N, N-dimethylformamide, refluxing, centrifuging, washing and drying to obtain an intermediate; and S4, putting the intermediate into a mixed solution prepared from graphene oxide, carbon nanotubes and a DMF solution, adding chloroplatinic acid, performing ultrasonic treatment, adding a reducing agent, and annealing to prepare the catalyst for the water electrolysis hydrogen production system. According to the catalyst for the water electrolysis hydrogen production system, the transition metal oxide is used for reducing the use amount of precious metal, the stability is high, and the catalytic activity is good.

Description

technical field [0001] The present application relates to the technical field of electrolyzed water, more specifically, it relates to a catalyst for a hydrogen production system by electrolyzed water and a preparation method thereof. Background technique [0002] Hydrogen energy, as a high-energy, clean and renewable energy source, has attracted widespread attention. Among many hydrogen production methods, electrochemical hydrolysis hydrogen production is recognized as a relatively simple and practical way. Electrocatalytic water splitting consists of two half-reactions, hydrogen evolution reaction and oxygen evolution reaction. In theory, only a voltage of 1.23V is required to occur. However, due to the generation of overpotential, the applied voltage is 1.8-2.0V, which is much higher than the theoretical voltage. . [0003] In industry, platinum, ruthenium, palladium, iridium precious metals and their oxides, such as ruthenium oxide or iridium oxide, are commonly used as ...

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Problems solved by technology

[0003] In industry, platinum, ruthenium, palladium, iridium precious metals and their oxides, such as ruthenium oxide or iridium oxide, are commonly used as catalysts to reduce the overpotential of the oxygen evolution reaction. Among them, platinum has the best hydrogen production effect, and precious metals such as platinum are used in The content in the earth's crust is only 3.7×10 -6 , is extremely scarce, and the cost is high. In addition, after a period of reaction, the noble metal catalyst is easy to agglomerate and has poor dispersion, which will lead to changes in the structure of the catalyst and affect its catalytic performance.

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