NiO/Ni bifunctional electrolyzed water catalyst and preparation method thereof

Abstract

The invention discloses a NiO / Ni bifunctional electrolyzed water catalyst and a preparation method thereof. The preparation method comprises the following steps: (1) uniformly mixing and grinding nickel nitrate hexahydrate, potassium chloride and sodium chloride, and heating; (2) after heating, cooling the mixture to room temperature, and then carrying out centrifugal treatment; (3) carrying out vacuum drying treatment on the centrifuged product to obtain NiO powder; (4) heating and reducing the NiO powder in an inert atmosphere to obtain a NiO / Ni powder material; and (5) uniformly dispersing the NiO powder and the NiO / Ni powder in a mixed solution of N, N-dimethylformamide and polyvinylidene fluoride, dispensing the mixed solution on carbon fiber paper, and naturally airing the carbon fiber paper to obtain the water electrolysis electrode material. According to the method, the working efficiency of catalyst preparation is improved through simple and feasible material selection and synthesis routes, and a simple, convenient and feasible new scheme is provided for developing a low-cost and high-activity difunctional electrolyzed water catalyst.

Description

technical field [0001] The invention relates to the technical field of electrolytic water catalysts, in particular to a NiO / Ni bifunctional electrolytic water catalyst and a preparation method thereof. Background technique [0002] With the aggravation of traditional energy demand crisis and environmental pollution, it is imminent to find renewable energy and clean energy to replace traditional fossil fuels. Hydrogen is considered to be a potential clean fuel in the future due to its abundant sources, high combustion value, low density, multiple available forms, non-polluting, and storable properties. Hydrogen can be produced by renewable energy sources such as hydropower, wind energy, solar energy, biomass energy, etc., non-renewable energy sources such as coal, natural gas, etc., and secondary energy sources such as electric energy. Hydrogen can be used in traditional fields and emerging transportation vehicles and hydrogen power generation. Therefore, hydrogen energy is...

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Problems solved by technology

[0004] At present, according to the development needs of hydrogen energy industrialization in various countries, clean and effective hydrogen production methods and the preparation of cheap and efficient hydrogen evolution catalysts have become research hotspots. As a mature, environmentally friendly and efficient hydrogen production method, electrolysis of water has been adopted by many researchers. , and there are many types of hydrogen evolution catalysts for hydrogen production and oxygen evolution catalysts for oxygen production. There are still some problems in these catalysts: (1) The choice of catalyst raw materials. At present, most of the commercial hydrogen production by electrolysis of water is still It adopts expensive noble metals such as platinum carbon as the hydrogen evolution catalyst, and uses noble metal oxides such as ruthenium oxide as the oxygen evolution catalyst; (2) At present, the cathode and anode catalysts are two different materials, and the catalysts need to be selected and different. The purchase channels, different preparation methods and other cumbersome processes, the current research is mainly focused on the development of single-function catalysts for hydrogen evolution reaction or oxygen evolution reaction, in practical applications need to design two different types of catalysts, adding electrolysis water equipment (3) Most of the preparation materials of current heterojunction catalysts are derived from different materials, which increases the workload in the process of heterojunction composite materials

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