A preparation method of a porous nickel alloy electrolysis hydrogen composite cathode material

A composite cathode and electrolysis technology, which is applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of low catalytic activity of hydrogen evolution electrodes, poor resistance to power failure and short circuit, and poor corrosion resistance, so as to reduce the hydrogen evolution process. Potential, good catalytic performance, good stability

Active Publication Date: 2018-01-19
XIANGTAN UNIV
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Problems solved by technology

[0005] The present invention provides a method for preparing a porous nickel alloy electrolytic hydrogen composite cathode material aiming at the disadvantages of low catalytic activity, poor corrosion resistance, poor power-off and short-circuit resistance, unstable hydrogen evolution, and complicated preparation process of the existing hydrogen evolution electrode.

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  • A preparation method of a porous nickel alloy electrolysis hydrogen composite cathode material
  • A preparation method of a porous nickel alloy electrolysis hydrogen composite cathode material

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Embodiment 1

[0030] Ni, Fe, Mo, C, LaNi 5 The five kinds of powders are prepared according to the proportion, among which Fe content is 25wt%, powder particle size is 3μm; Mo content is 5wt%, powder particle size is 3μm; C content is 5wt%; LaNi 5 The content is 1 wt%, and the powder particle size is 80 μm. 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 2% of the total powder mass, dry for 10 hours, and cold-press at a pressure of 250 MPa under a cold press for about 2 minutes. ; Place the pressed sample in a vacuum furnace at a vacuum of 1×10 -2In the case of Pa, maintain a heating rate of 10°C / min, from room temperature to 100°C, and hold for 30 minutes; then raise the temperature to 250°C at a heating rate of 10°C / min, and hold for 30 minutes; then raise the temperature at a heating rate of 10°C / min to 350°C and keep at this temperature for 30min; then raise the temperature to 490°C at a heating rate of 10°C / min an...

Embodiment 2

[0033] Ni, Fe, Mo, C, LaNi 5 The five kinds of powders are prepared in proportion, among which Fe content is 30wt%, powder particle size is 3μm; Mo content is 10wt%, powder particle size is 3μm; C content is 10wt%; LaNi 5 The content is 2wt%, and the powder particle size is 80 μm. Put the prepared powder on a V-type powder mixer and mix it at a constant speed for 10 hours, add 1% stearic acid of the total powder mass, and then dry it for 8 hours, and then cold press it under a cold press at a pressure of 200 MPa. The holding time is about 2min; place the pressed sample in a vacuum furnace at a vacuum of 1×10 -2 In the case of Pa, maintain a heating rate of 10°C / min, from room temperature to 120°C, and hold for 30 minutes; then raise the temperature to 280°C at a heating rate of 10°C / min, and hold for 30 minutes; then raise the temperature at a heating rate of 10°C / min to 360°C and keep at this temperature for 40 minutes; then raise the temperature to 500°C at a rate of 10°C / ...

Embodiment 3

[0036] Ni, Fe, Mo, C, LaNi 5 The five kinds of powders are prepared according to the proportion, among which Fe content is 25wt%, powder particle size is 3μm; Mo content is 1wt%, powder particle size is 3μm; C content is 1wt%; LaNi 5 The content is 0.5wt%, and the powder particle size is 30μm. Put the prepared powder on a V-type powder mixer and mix it at a constant speed for 10 hours, add 1.5% stearic acid of the total mass of the powder, and then dry it for 9 hours. 3min; place the pressed sample in a vacuum furnace at a vacuum of 1×10 -2 In the case of Pa, maintain a heating rate of 10°C / min, from room temperature to 130°C, and hold for 20 minutes; then raise the temperature to 300°C at a heating rate of 10°C / min, and hold for 20 minutes; then raise the temperature at a heating rate of 10°C / min to 380°C and keep at this temperature for 20min; then raise the temperature to 550°C at a rate of 10°C / min and keep at this temperature for 40min; then raise the temperature at a r...

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Abstract

The invention provides a preparation method of a porous nickel-alloy hydrogen evolution reaction composite cathode material, and the preparation method is mainly applied to the technical field of hydrogen evolution reactions. A powder reaction synthesis method is adopted, Ni, Fe, Mo, C and LaNi5 are prepared according to a certain ratio, the prepared powder is mixed evenly, 0.5-4% of stearic acid is added into the powder, a green body is obtained through pressure forming after drying is conducted and is subjected to vacuum sintering through the principle of solid-phase partial diffusion, and then the Ni-Fe-Mo-C / LaNi5 porous nickel-alloy hydrogen evolution reaction composite cathode material is obtained, wherein the content of the Fe, Mo, C and LaNi5 powder accounts for 22.5-52% of the total content. The porous nickel-alloy hydrogen evolution reaction composite cathode material prepared through the method has the advantages of being large in specific surface area, low in hydrogen evolution overpotential, good in catalytic property, good in corrosion resistance, stable in working performance, simple and environmentally friendly in preparation process, and the like, and has a significance to development of hydrogen energy sources.

Description

technical field [0001] The invention relates to a preparation technology of a porous nickel alloy material, in particular to a preparation method of a composite cathode material for electrolysis of hydrogen. Background technique [0002] As an efficient and clean secondary energy source, hydrogen energy is regarded as one of the most promising new energy sources in the future. The large-scale use of hydrogen energy will enable human beings to enter a sustainable green age, and the production of large quantities of cheap hydrogen is an important prerequisite for the development and utilization of hydrogen energy. At present, common hydrogen production methods include water electrolysis hydrogen production, biological hydrogen production, photocatalytic hydrogen production and fossil fuel hydrogen production. Among the many hydrogen production methods, the electrolytic water hydrogen production technology has the most significant advantages: low cost of raw materials for hydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F5/00C25B11/03
CPCB22F5/00C25B11/031
Inventor 肖逸锋徐阳刘艳吴靓许艳飞钱锦文郭小花汤智
Owner XIANGTAN UNIV
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