Preparation method of porous nickel base alloy electrolysis hydrogen evolution cathode material

A cathode material, electrolysis technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of low catalytic activity of hydrogen evolution electrode, poor resistance to power failure and short circuit, poor corrosion resistance, etc., to achieve the utilization rate of raw materials High, low price, good corrosion resistance effect

Inactive Publication Date: 2017-10-20
XIANGTAN UNIV
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Problems solved by technology

The present invention adopts Ni, Cr, Fe, Co powder to make porous material with abundant pores, utilizes its rich pore structure, lower hydrogen evolution overpotential, excellent electrocatalytic activity and good chemical stability to solve the problem of existing hydrogen evolution electrode Problems such as low catalytic activity, small specific surface area, poor corrosion resistance, poor resistance to power failure and short circuit, and unstable hydrogen evolution

Method used

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  • Preparation method of porous nickel base alloy electrolysis hydrogen evolution cathode material
  • Preparation method of porous nickel base alloy electrolysis hydrogen evolution cathode material

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Embodiment 1

[0024] The four high-purity element powders of Ni, Cr, Fe, and Co are prepared according to the mass percentage, the Cr content is 20%, the powder particle size is 3µm; the Fe content is 4%, the powder particle size is 3µm; the Co content is 6% , the powder particle size is 3µm; the balance is Ni powder with a powder particle size of 10µm. Put the prepared powder on a V-type powder mixer and mix it at a constant speed for 8 hours, then add 1% stearic acid of the total powder mass, and then dry it for 6 hours, and cold press it under a cold press at a pressure of 200 MPa, and the holding time is about 30s. ; Place the pressed sample in a vacuum furnace at a vacuum of 1x10 -2 In the case of Pa, keep a heating rate of 5°C / min, from room temperature to 140°C, and hold for 40 minutes; then raise the temperature to 300°C at a heating rate of 10°C / min, and hold for 80 minutes; then raise the temperature at a heating rate of 15°C / min to 650°C and keep it at this temperature for 80 mi...

Embodiment 2

[0028] The four high-purity element powders of Ni, Cr, Fe, and Co are prepared according to the mass percentage, the Cr content is 42%, the powder particle size is 10µm; the Fe content is 8%, the powder particle size is 10µm; the Co content is 1% , the powder particle size is 3µm; the balance is Ni powder with a powder particle size of 3µm. Put the prepared powder on a V-type powder mixer and mix it at a constant speed for 10 hours, then add stearic acid of 3% of the total powder mass, dry for 12 hours, and cold-press at a pressure of 50 MPa under a cold press for about 120 seconds. ; Place the pressed sample in a vacuum furnace at a vacuum of 1x10 -3 In the case of Pa, maintain a heating rate of 8°C / min from room temperature to 100°C and keep it for 15 minutes; then raise the temperature to 300°C at a heating rate of 3°C / min and keep it for 40 minutes; then raise the temperature at a heating rate of 5°C / min to 550°C and keep at this temperature for 50min; then raise the temp...

Embodiment 3

[0031] The four high-purity element powders of Ni, Cr, Fe, and Co are prepared according to the mass percentage, the Cr content is 30%, the powder particle size is 5µm; the Fe content is 10%, the powder particle size is 8µm; the Co content is 3% , the powder particle size is 6µm; the balance is Ni powder with a powder particle size of 8µm. Put the prepared powder on a V-type powder mixer and mix it at a constant speed for 16 hours, then add 1.5% stearic acid of the total powder mass, dry for 10 hours, and cold-press at a pressure of 180 MPa under a cold press for about 90 seconds ; Place the pressed sample in a vacuum furnace at a vacuum of 5x10 -3 In the case of Pa, maintain a heating rate of 15°C / min, from room temperature to 120°C, and hold for 25 minutes; then raise the temperature to 400°C at a heating rate of 5°C / min, and hold for 60 minutes; then raise the temperature at a heating rate of 8°C / min to 600°C and kept at this temperature for 70 minutes; then raised to 900°...

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Abstract

The invention discloses a preparation method of a porous nickel base alloy electrolysis hydrogen evolution cathode material. The preparation method is characterized in that four kinds of high-purity element powder, by mass percent, namely, 20-42% of Cr, 4-12% of Fe, 1-6% of Co and the balance Ni are mixed uniformly and dried, then compression moulding is carried out and thus a green body is obtained, and by using the solid phase partial diffusion principle, the green body is subjected to vacuum sintering, and a Ni-Cr-Fe-Co porous material is synthesized after reaction. The prepared porous material has the advantages of high specific surface area, low hydrogen evolution overpotential, relatively excellent corrosion resistance, good chemical stability, high mechanical strength and the like, and the preparation method is simple and environment-friendly, and has great significance in the development and application of hydrogen energy.

Description

technical field [0001] The invention relates to a preparation technology of a porous nickel-based alloy material, in particular to a preparation method of a Ni-Cr-Fe-Co electrolytic hydrogen cathode material. Background technique [0002] Since the industrial revolution, the traditional fossil fuel energy has been depleted day by day, and the reserves of fossil fuel energy have been depleted day by day. It is particularly important to develop clean and cheap new energy in time to gradually replace existing fossil fuels, reduce pollution and greenhouse gas emissions, and ultimately achieve zero emissions. Among the many new energy sources that people are exploring, hydrogen energy has attracted more and more attention because of its abundant reserves, high calorific value, cleanliness, high efficiency, and easy transportation. The development of hydrogen energy is triggering a profound energy revolution and will become an ideal secondary energy source in the 21st century. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/03B22F3/11
CPCB22F3/1121C25B11/031
Inventor 吴靓李晓娜肖逸锋许艳飞钱锦文徐阳郭小花曾灿
Owner XIANGTAN UNIV
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