A kind of ni-cr-al-cu porous material and preparation method thereof

A porous material, mass percentage technology, applied in electrolytic components, electrolytic process, electrode shape/type, etc., can solve the problems of high electrocatalytic activity, poor corrosion resistance, large specific surface area, etc., and achieve high electrocatalytic activity, The effect of high open porosity and large specific surface area

Active Publication Date: 2020-12-18
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an effective porous material for electrolysis of hydrogen and industrial filtration in alkaline environments such as seawater, which has abundant and evenly distributed pores, large specific surface area, and high electrocatalytic activity, which can solve the problem of water hydrogen production technology, especially seawater The problems of low catalytic efficiency, poor corrosion resistance, unstable hydrogen evolution and high production cost in electrolytic hydrogen production in alkaline environments overcome the problems of low filtration efficiency, poor mechanical properties, poor stability and high maintenance costs in the field of industrial filtration. question

Method used

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  • A kind of ni-cr-al-cu porous material and preparation method thereof
  • A kind of ni-cr-al-cu porous material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] The four high-purity element powders of Ni, Cr, Al, and Cu are prepared according to the mass percentage, wherein the Cr content is 25%, the powder particle size is 5 μm; the Al content is 13%, the powder particle size is 300 mesh; the Cu content is 7 %, the powder particle size is 9 μm; the balance is Ni powder with a powder particle size of 6 μm. Put the prepared powder on a V-type powder mixer and mix it at a constant speed for 9 hours, then add stearic acid of 1% of the total powder mass, dry it for 8 hours, and cold press it under a cold press at a pressure of 50 MPa for 120 seconds; Place the pressed sample in a vacuum furnace at a vacuum of 2×10 -3 In the case of Pa, maintain a heating rate of 10°C / min from room temperature to 280°C and keep it for 120 minutes; then raise the temperature to 580°C at a heating rate of 8°C / min and keep it for 180 minutes; then raise the temperature at a heating rate of 4 / min to 880°C and keep at this temperature for 60min; finally...

Embodiment 2

[0027] The four high-purity element powders of Ni, Cr, Fe and Co are prepared according to the mass percentage, wherein the Cr content is 20%, the powder particle size is 3 μm; the Al content is 10%, the powder particle size is 300 mesh; the Cu content is 5 %, the powder particle size is 5 μm; the balance is Ni powder with a powder particle size of 5 μm. Put the prepared powder on a V-type powder mixer and mix it at a constant speed for 12 hours, then add 2% stearic acid of the total powder mass, dry for 10 hours, and cold press with a pressure of 100 MPa under a cold press for 90 seconds; Place the pressed sample in a vacuum furnace at a vacuum of 1×10 -3 In the case of Pa, keep the heating rate of 15°C / min from room temperature to 300°C and keep it for 140min; then raise the temperature to 600°C at the rate of 10°C / min and keep it for 160min; then raise the temperature at the rate of 5°C / min to 950°C and keep at this temperature for 80 minutes; finally raise the temperature...

Embodiment 3

[0030]The four high-purity element powders of Ni, Cr, Al, and Cu were prepared according to the mass percentage, wherein the Cr content was 20%, the powder particle size was 7 μm; the Al content was 7%, the powder particle size was 300 mesh; the Cu content was 6 %, the powder particle size is 5 μm; the balance is Ni powder with a powder particle size of 9 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 with 3% of the total powder mass, dry for 12 hours, and cold press with a pressure of 150 MPa under a cold press for 60 seconds; Place the pressed sample in a vacuum furnace at a vacuum degree of 3×10 -3 In the case of Pa, maintain a heating rate of 11°C / min from room temperature to 270°C and keep it for 120 minutes; then raise the temperature to 580°C at a heating rate of 9°C / min and keep it for 180 minutes; then raise the temperature at a heating rate of 5°C / min to 900°C and keep at this temperature for 90...

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Abstract

The invention discloses a manufacturing method of an Ni-Cr-Al-Cu porous material. The manufacturing method comprises the steps that a powder reaction synthesis method is adopted, and high-purity Ni powder, high-purity Cr powder, high-purity Al powder and high-purity Cu powder are prepared in a certain ratio, wherein the total content of the Cr powder, the Al powder and the Cu powder is 22wt%-45wt%of the total content; after the prepared powder is uniformly mixed and dried, stearic acid is added, and drying is conducted again; pressure forming is conducted, so that a green blank is obtained; and vacuum sintering is conducted on the green blank by the use of the solid phase partial diffusion principle, so that the Ni-Cr-Al-Cu porous material is manufactured. The porous material manufacturedaccording to the manufacturing method has the low hydrogen evolution overpotential, the large specific surface area, excellent corrosion resistance, good catalytic performance and stable working performance, and a manufacturing technology of the porous material is simple and environmentally friendly, has the potential application value in the fields of hydrogen electrolysis evolution and industrial filtering, and has an important significance.

Description

technical field [0001] The invention relates to a preparation technology of a porous material, in particular to a preparation method of a Ni-Cr-Al-Cu porous material which can be used for electrolysis of hydrogen in an alkaline environment such as seawater. Background technique [0002] Water is the basic resource for human survival and development. Fresh water accounts for only 2.5% of the total water resources on the earth, while seawater accounts for 97.5% with an absolute advantage. In a sense, seawater is an inexhaustible renewable strategic resource. As we all know, our country is a veritable ocean power with 3 million square kilometers of ocean land under its jurisdiction. The continental coastline is about 18,000 kilometers, ranking fourth in the world, and the continental shelf area ranks fifth in the world. Therefore, China's seawater resources are extremely rich. If they can be used correctly, they will produce great economic benefits and political achievements....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/11C22C19/05C25B11/03C25B11/04
CPCB22F3/11B22F2998/00B22F2998/10C22C19/05C25B11/031C25B11/061B22F3/02B22F3/1007B22F2201/20
Inventor 吴靓段震曾毅肖逸锋许艳飞钱锦文张乾坤欧艳杨格叶明强曾毅夫周益辉
Owner XIANGTAN UNIV
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