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Preparation method of nickel-based alloy electrolysis hydrogen evolution cathode porous material

A porous material, nickel-based alloy technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of small specific surface area of ​​hydrogen evolution electrode, poor resistance to power failure and short circuit, low hydrogen evolution overpotential, etc. Inexpensive, low hydrogen evolution overpotential effect

Inactive Publication Date: 2018-07-06
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides an effective cathode catalytic material for the electrolysis hydrogen technology, the material has a rich pore structure, a lower hydrogen evolution overpotential, excellent electrocatalytic activity and good chemical stability, and solves the specific surface area of ​​the existing hydrogen evolution electrode Small size, high hydrogen evolution overpotential, poor catalytic activity, poor corrosion resistance, poor ability to withstand power failure and short circuit, and unstable hydrogen evolution

Method used

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

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Embodiment 1

[0024] Ni, W, Al, LaNi 5 The four kinds of powders are prepared according to the mass percentage, wherein the W content is 15%, the powder particle size is 3μm; the Al content is 10%, the powder particle size is 5μm; the LaNi5 content is 7%, the powder particle size is 20μm; the balance is powder Ni powder with a particle size of 8 μm. Put the prepared powder on a V-type powder mixer and mix it at a constant speed for 8 hours, then add stearic acid of 2% of the total powder mass, and then dry for 7 hours, and then cold press it under a cold press at a pressure of 100 MPa, and the holding time is about 40s ; Place the pressed sample in a vacuum furnace at a vacuum of 1x10 -2 In the case of Pa, maintain a heating rate of 10°C / min from room temperature to 110°C and keep it for 30 minutes; then raise the temperature to 270°C at a heating rate of 5°C / min and keep it for 60 minutes; then raise the temperature at a heating rate of 3°C / min to 450°C and keep it at this temperature fo...

Embodiment 2

[0028] Ni, W, Al, LaNi 5The four kinds of powders are prepared according to the mass percentage, wherein the W content is 28%, the powder particle size is 5 μm; the Al content is 5%, the powder particle size is 8 μm; the LaNi5 content is 3%, the powder particle size is 40 μm; the balance is powder Ni powder with a particle size of 5 μm. Put the prepared powder on a V-type powder mixer and mix it at a constant speed for 10 hours, then add 1% stearic acid of the total powder mass, and then dry for 12 hours, and cold press it under a cold press at a pressure of 50 MPa, and the holding time is about 100s ; Place the pressed sample in a vacuum furnace at a vacuum of 4x10 -3 In the case of Pa, maintain a heating rate of 5°C / min from room temperature to 150°C and keep it for 20 minutes; then raise the temperature at a rate of 8°C / min to 400°C and keep it for 40 minutes; then raise the temperature at a rate of 5°C / min to 550°C and keep at this temperature for 40min; then raise the t...

Embodiment 3

[0031] Ni, W, Al, LaNi 5 The four kinds of powders are prepared according to the mass percentage, wherein the W content is 20%, the powder particle size is 8μm; the Al content is 13%, the powder particle size is 6μm; the LaNi5 content is 5%, the powder particle size is 50μm; the balance is powder Ni powder with a particle size of 6 μm. Put the prepared powder on a V-type powder mixer and mix it at a constant speed for 7 hours, then add 1.5% stearic acid of the total powder mass, and then dry it for 9 hours, and cold press it under a cold press at a pressure of 120 MPa, and the holding time is about 25s ; Place the pressed sample in a vacuum furnace at a vacuum of 5x10 -3 In the case of Pa, maintain a heating rate of 8°C / min, from room temperature to 120°C, and hold for 40 minutes; then raise the temperature to 300°C at a heating rate of 10°C / min, and hold for 50 minutes; then raise the temperature at a heating rate of 6°C / min to 600°C and keep it at this temperature for 30 m...

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Abstract

The invention discloses a preparation method of a nickel-based alloy electrolysis hydrogen evolution cathode porous material. According to the preparation method, a Ni-W-Al-LaNi5 porous material is synthesized by uniformly mixing and drying four types of high-purity element powder, namely, Ni, W, Al and LaNi5, in the following percentage by mass: 15 to 32 percent of the W, 5 to 18 percent of the Al, 2 to 7 percent of the LaNi5, and the balance of Ni, pressing and forming to obtain a green body, and performing a vacuum sintering reaction on the green body by utilizing a solid phase partial diffusion principle. The porous material prepared by the preparation method has the advantages of abundant pores, large specific surface area, concerted catalysis, low hydrogen evolution over-potential, stable hydrogen evolution, good corrosion resistance, easiness, environment-friendliness, capacity of batch production and the like, and has important significance to production and application of hydrogen energy.

Description

technical field [0001] The invention relates to a preparation technology of a rare earth-containing nickel-based alloy porous material, in particular to a Ni-W-Al-LaNi 5 A method for preparing a cathode material for electrolysis of hydrogen. Background technique [0002] Hydrogen energy is a new energy source with abundant reserves, high calorific value, and no pollution. At present, research on hydrogen production is very active worldwide. The development of hydrogen energy and the development of hydrogen energy economy in the future are very important to my country's rapid economic growth, heavy dependence on energy imports, and increasing consumption. Common industrial hydrogen production methods include: fossil fuel hydrogen production process, water electrolysis hydrogen production, catalytic thermal decomposition of hydrocarbon hydrogen production, biological hydrogen production, etc. Among them, electrolysis of water to produce hydrogen has high production efficienc...

Claims

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Application Information

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IPC IPC(8): B22F3/11C22C19/03C25B11/03C25B11/04
CPCB22F3/11B22F2201/20B22F2998/10C22C19/03C25B11/031C25B11/061B22F2009/041B22F3/02B22F3/1007
Inventor 吴靓李晓娜肖逸锋许艳飞钱锦文郭小花徐阳杨格段震刘文
Owner XIANGTAN UNIV
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