Preparation method of high-strength and long-life porous nickel-based solid solution for electrolytic hydrogen production

A technology of porous nickel and solid solution, applied in the direction of electrolysis components, electrolysis process, electrodes, etc., to achieve the effect of excellent electrical conductivity, high strength and high permeability

Active Publication Date: 2020-06-09
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a porous nickel-based solid solution and its preparation method with the advantages of three-dimensional open pore structure, high permeability, high strength, large specific surface area, excellent electrical conductivity, etc., to solve the technical problems proposed in the above-mentioned background technology question

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  • Preparation method of high-strength and long-life porous nickel-based solid solution for electrolytic hydrogen production
  • Preparation method of high-strength and long-life porous nickel-based solid solution for electrolytic hydrogen production
  • Preparation method of high-strength and long-life porous nickel-based solid solution for electrolytic hydrogen production

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Effect test

Embodiment 1

[0020] Iron, cobalt, and nickel powders are prepared in an atomic ratio of 1:3:5, and then Mg powder is added as a pore-forming agent. The mass percentage of Mg powder is 20% of the total mass of iron, cobalt, and nickel powders.

[0021] Then use a tablet press to press into a billet, wherein the pressing pressure is 700Mpa, and the holding time is 30 seconds. Then place the obtained sample in a polycrystalline mullite fiber insulation barrel, and then put the insulation barrel into a microwave sintering furnace; then the vacuum in the furnace cavity is evacuated to less than 0.1 Pa, and then filled with argon with a purity of 99.999%. Control the output power of the microwave sintering furnace, heat it to 1100°C at a heating rate of 45°C / min, keep it for 15 minutes, then close the microwave sintering furnace, let the sample cool down with the furnace to obtain porous nickel that can be used as an anode material for hydrogen production by electrolysis of water base solid solu...

Embodiment 2

[0030] Iron, cobalt, and nickel powders are prepared in an atomic ratio of 1:3:5, and then Mg powder is added as a pore-forming agent. The mass percentage of Mg powder is 15% of the total mass of iron, cobalt, and nickel powders.

[0031] Then use a tablet press to press into a billet, wherein the pressing pressure is 700Mpa, and the holding time is 30 seconds. Then place the obtained sample in a polycrystalline mullite fiber insulation barrel, and then put the insulation barrel into a microwave sintering furnace; then the vacuum in the furnace cavity is evacuated to less than 0.1 Pa, and then filled with argon with a purity of 99.999%. Control the output power of the microwave sintering furnace, heat it to 1100°C at a heating rate of 45°C / min, keep it for 15 minutes, then close the microwave sintering furnace, let the sample cool down with the furnace to obtain porous nickel that can be used as an anode material for hydrogen production by electrolysis of water base solid solu...

Embodiment 3

[0033] Iron, cobalt, and nickel powders are prepared in an atomic ratio of 1:3:5, and then Mg powder is added as a pore-forming agent. The mass percentage of Mg powder is 10% of the total mass of iron, cobalt, and nickel powders.

[0034] Then use a tablet press to press into a billet, wherein the pressing pressure is 700Mpa, and the holding time is 30 seconds. Then place the obtained sample in a polycrystalline mullite fiber insulation barrel, and then put the insulation barrel into a microwave sintering furnace; then the vacuum in the furnace cavity is evacuated to less than 0.1 Pa, and then filled with argon with a purity of 99.999%. Control the output power of the microwave sintering furnace, heat it to 1100°C at a heating rate of 45°C / min, keep it for 15 minutes, then close the microwave sintering furnace, let the sample cool down with the furnace to obtain porous nickel that can be used as an anode material for hydrogen production by electrolysis of water base solid soluti...

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Abstract

A preparation method of high-strength and long-life porous nickel-based solid solution for electrolytic hydrogen production, using powder metallurgy microwave sintering method, using Mg powder as a pore-forming agent, and passing ultrafine Fe, Co, Ni powder and Mg powder with different content ratios After ball milling, press molding, and high temperature (>700°C) microwave sintering to make porous nickel-based solid solution. The porous nickel-based solid solution of the present invention has the advantages of three-dimensional open pore structure, high permeability, high strength, large specific surface area, excellent electrical conductivity, etc., and can form high catalytic The multi-component composite oxide active site with high performance is suitable for oxygen evolution electrode for hydrogen production by water electrolysis.

Description

technical field [0001] The invention discloses a method for preparing a high-strength and long-life porous nickel-based solid solution for electrolytic hydrogen production, and relates to a preparation method for an oxygen evolution electrode material for water electrolytic hydrogen production, specifically belonging to the technical field of porous nickel-based materials. Background technique [0002] In recent years, people have extensively studied the performance of cheap and easy-to-obtain oxygen evolution catalysts such as oxides, sulfides, selenides, hydroxides, and phosphides of the first transition group metals, such as Ni, Co, Fe, and Mn-based oxygen evolution catalysts. catalyst. These transition metal oxides have the advantages of low cost, abundant resources, easy synthesis, and environmental friendliness, and have attracted the attention of many researchers. However, they still have poor electrical conductivity, higher overpotential for oxygen evolution half-rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C19/03B22F3/11C25B1/04C25B11/03C25B11/06
CPCB22F3/1121C22C19/03C25B1/04C25B11/031C25B11/061Y02E60/36
Inventor 徐吉林叶志国
Owner NANCHANG HANGKONG UNIVERSITY
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