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Preparation method for water electrolysis hydrogen production electrode material

An electrode material, a technology for electrolyzing water, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of not being able to be eliminated in time, blocking hydrogen in pores, reducing activity, etc., and achieving good pore structure characteristics, low cost, and production methods. simple effect

Active Publication Date: 2013-04-17
海南爱华环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Raney Ni is a porous cathode material for electrolytic hydrogen production, but it has problems such as too small pore size (often less than 10nm), hydrogen blockage in the pores during the hydrogen evolution process, and reduced activity.

Method used

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  • Preparation method for water electrolysis hydrogen production electrode material
  • Preparation method for water electrolysis hydrogen production electrode material
  • Preparation method for water electrolysis hydrogen production electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Catalytic activity test of electrode for hydrogen production by electrolysis of water

[0024] Nickel powder with an average particle size of 3 microns and aluminum powder with an average particle size of 3 microns are used to make a mixture according to the ratio of Ni powder to the total weight of Ni powder and Al powder 15wt%, and then the mixture is heated at 150MPa Under the pressure of 10 seconds, it was cold-pressed and formed into a strip-shaped green compact with a width of 6 mm, a thickness of 2 mm, and a length of 6 mm. Place the compact in a 1×10 -3 Under Pa vacuum conditions, firstly, the temperature was raised to 500°C at a heating rate of 5°C / min, and kept for 1 h; then, the temperature was raised to 900°C at a heating rate of 5°C / min, and the temperature was kept for 1 h; finally, the furnace was cooled to room temperature (25°C), That is, the electrode material for electrolyzing water for hydrogen production is obtained. The electrode wire i...

Embodiment 2

[0030] Example 2: Electrode catalytic activity test for electrolysis of water for hydrogen production

[0031] Using nickel powder with an average particle size of 8 microns and aluminum powder with an average particle size of 8 microns, the mixture is mixed according to the ratio of Ni powder to the total weight of Ni powder and Al powder 15wt%, and then the mixture is heated at 150MPa. Under the pressure of 10 seconds, it was cold-pressed and formed into a strip-shaped green compact with a width of 6 mm, a thickness of 2 mm, and a length of 6 mm. Place the compact in a 1×10 -3 Under Pa vacuum conditions, firstly, the temperature was raised to 450°C at a heating rate of 5°C / min, and kept for 1 h; then, the temperature was raised to 900°C at a heating rate of 5°C / min, and the temperature was kept for 1 h; Electrode material for hydrogen production from water electrolysis. The electrode wire is then drawn from the electrode material by spot welding. The electrode material fo...

Embodiment 3

[0032] Example 3: Electrode catalytic stability test for electrolysis of water for hydrogen production

[0033] The electrolytic water hydrogen production electrode prepared in Example 1 was tested for catalytic stability. The measurement method was cyclic voltammetry, the scanning potential range was -0.7 to -1.4V, the scanning rate was 10mV / s, and the scanning period was 500 cycles. Other conditional parameters are as follows:

[0034] The geometric area of ​​the working electrode of the present invention is 1cm 2

[0035]

[0036] The results are shown in Table 2. It can be seen from the table that the Ni-Al porous material of the present invention has excellent catalytic stability for electrolytic hydrogen production.

[0037] Table 2 Current density values ​​measured by cyclic voltammetry at -1.39V potential

[0038]

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Abstract

The invention discloses a preparation method for a water electrolysis hydrogen production electrode material. The method comprises the steps of (1) performing cold press molding: mixing Ni powder and Al powder to make a mixture, enabling the mixture to undergo cold press molding to make pressure blank; by weight, enabling the Ni powder to be 80-95% and enabling the Al powder to be 5-20% on the basis of the Ni powder and the Al powder; (2) performing sintering and cooling: heating the pressure blank to 350-500 DEG C under vacuum, preserving heat for 60-90min, then warming to 700-950 DEG C, preserving heat for 30-120min, cooling to room temperature, and obtaining the water electrolysis hydrogen production electrode material. The water electrolysis hydrogen production electrode material has uniformity in pore diameter distribution, has high specific surface and high activity, and is long in service life, high in catalytic efficiency, simple in production method and low in cost. A novel cathode material choice is provided for water electrolysis hydrogen production, and the water electrolysis hydrogen production electrode material has wide applied prospect.

Description

(1) Technical field [0001] The invention relates to the preparation of an electrode, and in particular to a method of preparing an electrode material for electrolyzing water to produce hydrogen. (2) Background technology [0002] Energy and environment are two necessary conditions for achieving sustainable development. With its unique advantages, fuel cells are considered the most promising power source for automobiles. Their widespread application can alleviate the pressure on both energy and environmental protection. Compared with methanol and other fossil fuels, hydrogen has a wide range of applications, such as electronic industry, metallurgical industry, food processing, float glass, fine chemicals and other fields. As an energy source, hydrogen is the fuel for future power generation and fuel cells for electric vehicles. Hydrogen-oxygen fuel cells, which use hydrogen as fuel and oxygen as oxidant, convert chemical energy into electrical energy through the combustion ...

Claims

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Application Information

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IPC IPC(8): B22F3/16B22F3/11C25B11/03C25B11/04C25B1/04
CPCY02E60/36
Inventor 董虹星刘秋平陈文娴贺跃辉
Owner 海南爱华环保科技有限公司
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