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Preparation method of Ni-P/nickel phosphide-carbon cloth three-dimensional self-supporting hydrogen evolution electrode material

A hydrogen evolution electrode, nickel phosphide technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of poor stability of hydrogen evolution electrode active materials, few hydrogen evolution active sites in electrodes, poor conductivity of nickel phosphide components, etc. Excellent electrical conductivity, many catalytically active sites, and low cost

Active Publication Date: 2019-11-22
YANSHAN UNIV
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Problems solved by technology

The patent with the publication number CN108380227 discloses a hydrogen evolution electrocatalytic material and its preparation method. It uses red phosphorus, self-made spherical metal nickel powder and graphene with a mass fraction of 3% as the main raw materials, and uses a tablet press to process the raw materials. Preformed treatment, and then in situ reaction at high temperature, prepared a three-dimensional porous self-supporting nickel phosphide hydrogen evolution electrocatalytic material, although this technology can ensure a high bonding strength between the catalyst component and the substrate, but its Catalytic hydrogen evolution activity is not good, and there is still a big gap with noble metal Pt-based catalytic materials
The patent with the publication number CN106498434 discloses a method for preparing an integrated nickel-based porous nickel phosphide electrode. With nickel foam as the substrate, the nickel foam substrate is first chemically etched to obtain a nickel-based porous nickel precursor, and then solid-phase reduction is used to The in-situ phosphating method is used to carry out in-situ phosphating. Although the prepared material shows excellent hydrogen evolution performance, the active material of the hydrogen evolution electrode has poor stability and is easy to lose.
Based on the current technical defects in the preparation process of the hydrogen evolution catalytic electrode, the catalyst needs to be bonded and fixed with a binder, the conductivity of the nickel phosphide component is poor, and the hydrogen evolution active sites of the electrode are few. The design and preparation method of three-dimensional self-supporting hydrogen evolution electrode materials with high mass transfer rate, fast liquid phase mass transfer rate and simple process is an important development content of hydrogen production by water electrolysis

Method used

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  • Preparation method of Ni-P/nickel phosphide-carbon cloth three-dimensional self-supporting hydrogen evolution electrode material
  • Preparation method of Ni-P/nickel phosphide-carbon cloth three-dimensional self-supporting hydrogen evolution electrode material
  • Preparation method of Ni-P/nickel phosphide-carbon cloth three-dimensional self-supporting hydrogen evolution electrode material

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preparation example Construction

[0042] The invention discloses a preparation method of nickel phosphorus / nickel phosphide-carbon cloth three-dimensional self-supporting hydrogen evolution electrode material, including carbon cloth which needs acid impregnation, and the acid impregnation treatment steps of carbon cloth material are as follows:

[0043] Step 1. Add concentrated nitric acid with a volume of 100mL and a mass concentration of 65-68% into a 250mL beaker, and then cut eight pieces of carbon cloth with a thickness of 0.33mm into 2cm×2cm and add them to the beaker filled with concentrated nitric acid. 250mL beaker, and seal the mouth of the beaker with plastic wrap, and leave it at room temperature for 45-48 hours to carry out acid impregnation and hydrophilic modification on the carbon cloth;

[0044] Step Ⅱ. After standing still, place the beaker in an ultrasonic cleaner for ultrasonic treatment. The ultrasonic cleaner is filled with deionized water at a temperature of 20-30°C. The power of the clea...

Embodiment 1

[0062] Step 1. Add 0.7270g of nickel nitrate and 0.7010g of hexamethylenetetramine into a beaker filled with 18mL of deionized water in turn, then place the beaker on a magnetic stirrer and stir at room temperature to dissolve it;

[0063] Step 2. Transfer the solution stirred in step 1 to a 25mL polytetrafluoroethylene-lined stainless steel reaction kettle, and at the same time put the acid-impregnated square carbon cloth with a length and width of 2cm into the stainless steel for reaction. In the kettle, tighten the sealing cover of the stainless steel reaction kettle and transfer it to the electric furnace. The furnace temperature of the electric furnace is 100 ° C, and the hydrothermal reaction is carried out at this temperature for 10 hours; after the reaction, the power supply of the electric furnace is turned off, and the stainless steel reaction Take out the kettle from the electric furnace and open the sealing cover of the reaction kettle, take the carbon cloth out of ...

Embodiment 2

[0076] Step 1. Add 0.70g of nickel nitrate and 0.70g of hexamethylenetetramine into a beaker filled with 15mL of deionized water in turn, then place the beaker on a magnetic stirrer and stir at room temperature to dissolve it;

[0077] Step 2. Transfer the solution stirred in step 1 to a 25mL polytetrafluoroethylene-lined stainless steel reaction kettle, and at the same time put the acid-impregnated square carbon cloth with a length and width of 2cm into the stainless steel for reaction. In the kettle, tighten the sealing cover of the stainless steel reaction kettle and transfer it to the electric furnace. The furnace temperature of the electric furnace is 100 ° C, and the hydrothermal reaction is carried out at this temperature for 10 hours; after the reaction, the power supply of the electric furnace is turned off, and the stainless steel reaction Take out the kettle from the electric furnace and open the sealing cover of the reaction kettle, take the carbon cloth out of the ...

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Abstract

The invention relates to a preparation method of a Ni-P / nickel phosphide-carbon cloth three-dimensional self-supporting hydrogen evolution electrode material. The invention belongs to the technical field of hydrogen electrode material preparation. The preparation method comprises the following steps: performing hydrothermal reaction on carbon cloth subjected to acid impregnation modification treatment to grow nickel hydroxide; nickel hydroxide is subjected to phosphating treatment, a nickel phosphide-carbon cloth three-dimensional self-supporting material is obtained, then a nickel-phosphorusalloy is electrically deposited on nickel phosphide-carbon cloth, and then the nickel-phosphorus / nickel phosphide-carbon cloth three-dimensional self-supporting electrode material which does not needadditional bonding and is excellent in electro-catalytic hydrogen evolution performance is prepared. The preparation method has the advantages that the technical process is simple, the cost is low, industrial application is easy, the prepared electrode material is rich and intercommunicated in internal pore channels, the conductivity is excellent, the specific surface area is large, the number ofelectrocatalytic active sites is large, and the prepared nickel phosphorus / nickel phosphide-carbon cloth three-dimensional self-supporting electrode material has a good application prospect in the fields of hydrogen energy development and application.

Description

technical field [0001] The invention relates to a preparation method of nickel phosphorus / nickel phosphide-carbon cloth three-dimensional self-supporting hydrogen evolution electrode material, and belongs to the technical field of hydrogen electrode material preparation. Background technique [0002] The rapid development of social economy has caused serious environmental pollution, rapid energy consumption, and resource scarcity, which urgently require the development and application of clean and renewable energy. Among many clean energy sources, hydrogen energy is an economical, efficient, and sustainable green energy. Energy, one of the most ideal energy carriers, has received more and more attention. Among various hydrogen production technologies, hydrogen production by electrolysis of water is considered to be one of the most effective ways to lead to a "hydrogen economy". However, in practical applications, hydrogen production by water electrolysis often needs to over...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B11/14C25B1/04
CPCC25B1/04C25B11/044C25B11/051C25B11/091Y02E60/36
Inventor 宋来洲杨帆杨淑琴贺君王秀丽霍思月牛倩倩
Owner YANSHAN UNIV
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