Electrocatalytic hydrogen production porous high-entropy alloy electrode material and preparation method thereof

A high-entropy alloy and electrode material technology, applied in the direction of electrodes, electrolytic processes, electrolytic components, etc., to achieve the effects of large active specific surface area, environmental friendliness, and short preparation time

Active Publication Date: 2020-04-28
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that microwave sintering has not yet been used to prepare porous high-entropy alloy electrode materials for hydrogen production by electrolysis of water at home and abroad, the first aspect of the present invention provides a method for preparing porous high-entropy alloy electrode materials for electrocatalytic hydrogen production, including the following step:

Method used

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  • Electrocatalytic hydrogen production porous high-entropy alloy electrode material and preparation method thereof
  • Electrocatalytic hydrogen production porous high-entropy alloy electrode material and preparation method thereof
  • Electrocatalytic hydrogen production porous high-entropy alloy electrode material and preparation method thereof

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Embodiment 1

[0032] 1. A method for preparing a porous high-entropy alloy electrode material for electrocatalytic hydrogen production, comprising the following steps:

[0033] S1. First mix cobalt powder, chromium powder, iron powder, nickel powder and molybdenum powder with a purity of not less than 99.5% and a particle size between 1 and 100 μm in an atomic ratio of 35:15:20:20:10. The mixed powder is placed in a planetary ball mill, the control speed is 250 r / min, and the ball mill is 6h until uniform; then add magnesium powder and continue ball milling for 2h until uniform, the mass percentage of the magnesium powder is cobalt powder, chromium powder, iron powder, nickel powder 20% of the total mass of powder, molybdenum powder and magnesium powder; finally, use a press to press the above-mentioned mixed powder into a sample billet, the pressure is 650MPa, and the pressure is maintained for 1min;

[0034] S2. Place the sample compacted in step S1 at the central position in the polycrys...

Embodiment 2

[0056] 1. A method for preparing a porous high-entropy alloy electrode material for electrocatalytic hydrogen production, comprising the following steps:

[0057] S1. First mix cobalt powder, chromium powder, iron powder, nickel powder and molybdenum powder with a purity of not less than 99.5% and a particle size between 1 and 100 μm in an atomic ratio of 35:15:20:20:10. The mixed powder is placed in a planetary ball mill, the control speed is 200 r / min, and the ball mill is 7h until uniform; then add magnesium powder and continue ball milling for 3h until uniform, the mass percentage of the magnesium powder is cobalt powder, chromium powder, iron powder, nickel powder 5% of the total mass of powder, molybdenum powder and magnesium powder; finally, use a press to press the above mixed powder into a sample billet, the pressure is 750MPa, and the pressure is maintained for 2min;

[0058] S2. Place the sample compacted in step S1 at the central position in the polycrystalline mul...

Embodiment 3

[0062] 1. A method for preparing a porous high-entropy alloy electrode material for electrocatalytic hydrogen production, comprising the following steps:

[0063] S1. First mix cobalt powder, chromium powder, iron powder, nickel powder and molybdenum powder with a purity of not less than 99.5% and a particle size between 1 and 100 μm in an atomic ratio of 35:15:20:20:10. The mixed powder is placed in a planetary ball mill, the control speed is 300 r / min, and the ball mill is 4h until uniform; then add magnesium powder and continue ball milling for 1.5h to be uniform, the mass percentage of the magnesium powder is cobalt powder, chromium powder, iron powder, 10% of the total mass of nickel powder, molybdenum powder and magnesium powder; finally, the above-mentioned mixed powder is pressed into a sample billet with a press machine, and the pressure is 800MPa, and the pressure is maintained for 3 minutes;

[0064] S2. Place the sample compacted in step S1 at the central position ...

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Abstract

The invention provides an electrocatalytic hydrogen production porous high-entropy alloy electrode material and a preparation method thereof. The preparation method comprises the following steps: S1,firstly, mixing cobalt powder, chromium powder, iron powder, nickel powder and molybdenum powder, carrying out uniform ball milling by using a planetary ball mill, then adding magnesium powder and carrying out uniform ball milling by using the planetary ball mill, and finally, pressing the mixed powder into a sample blank by using a sample pressing machine; S2, placing the sample blank in a polycrystalline mullite fiber heat preservation barrel, and then placing the heat preservation barrel in a microwave sintering furnace to be subjected to microwave sintering; S3, closing the microwave furnace for cooling along with the furnace, and then closing the microwave sintering furnace, so that the sample is cooled to room temperature along with the furnace to obtain a porous high-entropy alloy;S4, treating the porous high-entropy alloy through cyclic voltammetry for electrochemical activation, thereby preparing the porous high-entropy alloy electrode material. The porous high-entropy alloyelectrode material prepared by the method has the advantages of three-dimensional porous self-supporting structure, high strength, large active specific surface area, low overpotential, small tafel slope, corrosion resistance and the like.

Description

technical field [0001] The invention relates to the technical field of high-entropy alloy catalysis and energy storage applications, in particular to a porous high-entropy alloy electrode material for electrocatalytic hydrogen production and a preparation method thereof. Background technique [0002] At present, the conversion of clean energy such as solar energy and wind energy into hydrogen energy can greatly solve the energy crisis and the greenhouse effect and has attracted widespread attention. Hydrogen production by electrolysis of water is the main method of hydrogen production. Theoretically, the voltage required for electrolysis of water is 1.23V , the actual industrial electrolysis of water needs about 1.8~2V. Platinum and platinum-based materials are the most ideal electrode materials, but their reserves are scarce, expensive, and unsuitable for industrial applications. Therefore, new and cheap electrode materials are urgently needed to reduce their overpotential....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/06C22C30/00B22F9/04B22F3/02B22F3/105B22F3/24
CPCB22F3/02B22F3/105B22F3/24B22F9/04B22F2003/1054B22F2009/043B22F2999/00C22C30/00C25B1/04C25B11/061B22F2201/11Y02E60/36
Inventor 徐吉林唐剑罗军明
Owner NANCHANG HANGKONG UNIVERSITY
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