High-entropy alloy water electrolysis catalytic material and preparation method thereof

Abstract

The application discloses a high-entropy alloy water electrolysis catalytic material and a preparation method thereof, relates to the technical field of water electrolysis catalytic materials, and the high-entropy alloy water electrolysis catalytic material is in a sheet structure and mainly comprises Fe a Co b Ni c Cu x Mo y , according to atomic percentage, a+b+c+x+y=1, 60at%<=a+b+c<=at90%, 10at%<=x+y<=40at%, 20at%<=a<=40at%, 20at%<=b<=40at%, 10at%<=c<=20at%, 5at%<=x<=35at%, and 5at%<=y<=35at%. The high-entropy alloy in the sheet structure is used as the water electrolysis catalytic material, the main components are Fe, Co, Ni, Cu and Mo, high catalytic performance can be provided, the use cost can be effectively reduced, and the popularization and application of the water electrolysis hydrogen production technology are promoted.

Description

Technical Field

[0001] This invention relates to the field of water electrolysis catalytic materials technology, specifically to a high-entropy alloy water electrolysis catalytic material and its preparation method. Background Technology

[0002] Hydrogen production via water electrolysis is a relatively convenient method. The water electrolysis reaction includes the hydrogen evolution reaction at the cathode and the oxygen evolution reaction at the anode. The oxygen evolution reaction at the anode is a four-electron process with relatively slow kinetics, resulting in an excessively high overpotential for water splitting and affecting electrolysis efficiency. Therefore, a highly efficient catalyst is needed to accelerate the oxygen evolution reaction process and improve hydrogen production efficiency.

[0003] Currently, the catalysts commonly used in water electrolysis are still precious metal materials such as Pt, Au, Ru, and Ir. Although precious metal materials have high catalytic performance, they are expensive and scarce, which seriously limits the promotion and application of water electrolysis hydrogen production technology. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a high-entropy alloy water electrolysis catalytic material and its preparation method. By using a plate-like high-entropy alloy as the water electrolysis catalytic material, the main components of which are Fe, Co, Ni, Cu and Mo, it can not only provide high catalytic performance, but also effectively reduce the cost of use, which is conducive to promoting the application of water electrolysis hydrogen production technology.

[0005] This invention provides a high-entropy alloy water electrolysis catalyst material, wherein the high-entropy alloy water electrolysis catalyst material has a sheet-like structure, and the main component of the sheet-like structure is Fe. a Co b Ni c Cu x Mo y According to atomic percentage, a+b+c+x+y=1, 60at%≤a+b+c≤at90%, 10at%≤x+y≤40at%, 20at%≤a≤40at%, 20at%≤b≤40at%, 10at%≤c≤20at%, 5at%≤x≤35at%, 5at%≤y≤35at%.

[0006] Specifically, a is 30 at%, b is 30 at%, c is 15 at%, x is 15 at%, and y is 10 at%.

[0007] This invention also provides a method for preparing a high-entropy alloy water electrolysis catalyst, comprising the following steps:

[0008] S1, according to Fe a Cob Ni c Cu x Mo y Based on the atomic ratios in the mixture, Fe, Co, Ni, Cu and Mo metal particles were weighed and mixed evenly to obtain a mixed metal raw material.

[0009] S2. The mixed metal raw material is placed in a vacuum induction melting furnace and repeatedly melted 3 to 6 times, and then injected into a water-cooled copper mold to obtain a high-entropy alloy ingot.

[0010] S3. Take a preset number of the high-entropy alloy ingots and hot roll them into high-entropy alloy bars, and take a preset number of the high-entropy alloy ingots and crush them into high-entropy alloy scraps;

[0011] S4. Take at least 3 of the high-entropy alloy bars and wind them into a high-entropy alloy cable, then bury the high-entropy alloy cable in the high-entropy alloy debris and heat it until it melts into one piece to obtain a forging blank.

[0012] S5. The forged blank is repeatedly heated and forged to produce a high-entropy alloy sheet;

[0013] S6. Immerse the high-entropy alloy sheet in an oxidizing solution for 5-10 minutes to obtain a high-entropy alloy water electrolysis catalyst.

[0014] Specifically, in step S1, the diameter of the metal particles is less than or equal to 5 mm.

[0015] Specifically, in step S2, the melting parameters include:

[0016] Before melting, the vacuum degree of the vacuum induction melting furnace is controlled within the range of 3.0 × 10⁻⁶. -2 ~6.0×10 -2 Pa;

[0017] During the smelting process, nitrogen gas at 50-60 kPa is introduced into the vacuum induction melting furnace as a protective atmosphere.

[0018] During smelting, the intermediate frequency range of the vacuum induction melting furnace is controlled to be 1500-2500Hz;

[0019] The melting time should be controlled between 1 and 3 minutes.

[0020] Specifically, in step S3, the diameter of the high-entropy alloy strip is in the range of 3 to 6 mm, and the particle size of the high-entropy alloy debris is in the range of 0.1 to 0.5 mm.

[0021] Specifically, in step S4, the mass ratio of the high-entropy alloy cable to the high-entropy alloy fragments is 1:1 to 2.5.

[0022] Specifically, in step S5, the thickness of the high-entropy alloy sheet is in the range of 3 to 5 mm, the length of the high-entropy alloy sheet is in the range of 10 to 20 cm, and the width of the high-entropy alloy sheet is in the range of 7 to 15 cm.

[0023] Specifically, before step S6, the following steps are also included:

[0024] The high-entropy alloy sheet is forged to form several pits on its surface.

[0025] Specifically, in step S6, the oxidizing solution is an acidic potassium permanganate solution or an acidic potassium dichromate solution.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] The high-entropy alloy water electrolysis catalytic material of this invention is mainly composed of Fe, Co, Ni, Cu, and Mo. Its cost is lower than that of precious metal materials such as Pt, Au, Ru, and Ir, which is beneficial for promoting the application of water electrolysis hydrogen production technology. Furthermore, by precisely controlling the atomic percentages of the five elements Fe, Co, Ni, Cu, and Mo, an effective combination of high-entropy effect and catalytic activity is achieved, ensuring high catalytic performance and high structural stability. Simultaneously, the plate-like structure design further increases the specific surface area of ​​the material, providing more active sites and further improving its catalytic performance. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic flowchart of the preparation method of high-entropy alloy water electrolysis catalyst in an embodiment of the present invention. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides a high-entropy alloy water electrolysis catalyst material, wherein the high-entropy alloy water electrolysis catalyst material has a sheet-like structure, and the main component of the sheet-like structure is Fe.a Co b Ni c Cu x Mo y According to atomic percentage, a+b+c+x+y=1, 60at%≤a+b+c≤at90%, 10at%≤x+y≤40at%, 20at%≤a≤40at%, 20at%≤b≤40at%, 10at%≤c≤20at%, 5at%≤x≤35at%, 5at%≤y≤35at%.

[0032] The high-entropy alloy water electrolysis catalytic material of this invention mainly consists of Fe, Co, Ni, Cu, and Mo. Fe, Co, and Ni, as the basic components, provide excellent intrinsic catalytic activity, while the introduction of Cu and Mo further optimizes the electronic structure of the catalytic material. Fe, Co, Ni, Cu, and Mo are all non-precious metal materials, with lower usage costs than precious metal materials such as Pt, Au, Ru, and Ir, which is beneficial for promoting the widespread application of water electrolysis hydrogen production technology. Moreover, by precisely controlling the atomic percentages of the five elements Fe, Co, Ni, Cu, and Mo, an effective combination of high-entropy effect and catalytic activity is achieved, ensuring high catalytic performance and high structural stability. At the same time, the plate-like structure design further increases the specific surface area of ​​the material, providing more active sites and further improving its catalytic performance.

[0033] In some specific embodiments, a is 30 at%, b is 30 at%, c is 15 at%, x is 15 at%, and y is 10 at%. Fe and Co each contain 30 at%, which can form a stable framework in the sheet-like structure, providing good mechanical strength and electron transport capability; Ni contains 15 at%, which can synergize with Fe and Co to further enhance the catalytic activity of the catalytic material; Cu (15 at%) and Mo (10 at%), as auxiliary elements, can be distributed on the surface or subsurface of the sheet-like structure, regulating the local electronic structure and optimizing the desorption process of hydrogen or oxygen.

[0034] This invention also provides a method for preparing a high-entropy alloy water electrolysis catalyst. Figure 1 This invention illustrates a schematic flowchart of a method for preparing a high-entropy alloy water electrolysis catalyst, comprising the following steps:

[0035] S1, according to Fe a Co b Ni c Cu x Mo y Based on the atomic ratios in the mixture, Fe, Co, Ni, Cu and Mo metal particles were weighed and mixed evenly to obtain a mixed metal raw material.

[0036] By accurately weighing each metal particle and mixing them evenly, a foundation is laid for the subsequent smelting of the mixed metal raw materials, which helps to improve the uniformity of the smelting process.

[0037] In some specific embodiments, the diameter of the metal particles is less than or equal to 5 mm, which helps to improve the uniformity of the mixing process of the metal particles, reduces the difficulty of subsequent smelting, and improves the dispersion of the metal elements during smelting.

[0038] Specifically, the diameter of the metal particles can be controlled at 1mm, 2mm, 3mm, 4mm or 5mm; preferably, the diameter of the metal particles is 1mm. The smaller the diameter of the metal particles, the easier it is to mix evenly and the better the dispersion during melting.

[0039] S2. The mixed metal raw material is placed in a vacuum induction melting furnace and repeatedly melted 3 to 6 times, and then injected into a water-cooled copper mold to obtain a high-entropy alloy ingot.

[0040] After the vacuum induction melting furnace melts the mixed metal raw materials into molten metal, it generates an electromagnetic stirring effect on the molten metal, which can accelerate the physicochemical reaction rate during the melting process; it can also make the composition of the molten metal uniform; it can also make the temperature of the molten metal more uniform, promoting the complete completion of the reaction during melting; moreover, the electromagnetic stirring overcomes the effect of the static pressure of the molten metal itself, which can turn the melting bubbles deep inside the liquid to the surface, making it easier for gas to be discharged and reducing the gas inclusion content of the alloy.

[0041] Multiple smelting processes can effectively disperse the various metallic elements, reduce defects in high-entropy alloy ingots, and optimize the crystal structure of the ingots. Specifically, smelting can be performed 3, 4, 5, or 6 times. After more than 6 smeltings, the crystal structure of the high-entropy alloy ingot becomes basically stable, and further smelting will increase unnecessary energy consumption and production costs.

[0042] In some specific embodiments, the melting parameters include:

[0043] Before melting, the vacuum degree of the vacuum induction melting furnace is controlled within the range of 3.0 × 10⁻⁶. -2 ~6.0×10 -2 The vacuum level of the induction melting furnace can effectively purge air from the furnace, thereby reducing the impact of gaseous impurities during the melting process and improving the purity of the alloy. Preferably, the vacuum level of the induction melting furnace is controlled within the range of 4.0 × 10⁻⁶. -2 ~5.0×10 -2 Pa helps reduce the workload of the vacuum pump.

[0044] During smelting, nitrogen gas at 50-60 kPa is introduced into the vacuum induction melting furnace as a protective atmosphere to prevent oxidation reactions during high-temperature smelting and ensure the stability of the alloy composition. Preferably, nitrogen gas at 55 kPa is introduced into the vacuum induction melting furnace to provide protection without affecting the discharge of gas from the molten metal.

[0045] During smelting, the medium frequency range of the vacuum induction melting furnace is controlled at 1500-2500Hz, which helps to achieve rapid and complete melting of mixed metal raw materials; preferably, the medium frequency range of the vacuum induction melting furnace is controlled at 2000Hz, which can produce a good electromagnetic stirring effect.

[0046] The melting time is controlled between 1 and 3 minutes, which is sufficient to ensure that all metal raw materials are fully melted and mixed evenly; preferably, the melting time is controlled at 2 minutes, which has good coordination with other process parameters.

[0047] S3. Take a preset number of the high-entropy alloy ingots and hot roll them into high-entropy alloy bars, and take a preset number of the high-entropy alloy ingots and crush them into high-entropy alloy scraps;

[0048] High-entropy alloy bars and chips are prepared by hot rolling and crushing, respectively, to provide raw materials for subsequent processing.

[0049] In some specific embodiments, the diameter of the high-entropy alloy strip is in the range of 3 to 6 mm, which is a suitable thickness, giving the high-entropy alloy strip appropriate strength and flexibility. When the diameter of the high-entropy alloy strip is less than 3 mm, the high-entropy alloy strip is too thin and weak, and is prone to breakage or deformation during the winding process; when the diameter of the high-entropy alloy strip is greater than 6 mm, the high-entropy alloy strip is too thick and stiff, making it difficult to perform effective winding operations.

[0050] Preferably, the diameter of the high-entropy alloy bar is 4mm, which is good for winding into a high-entropy alloy cable and makes it easy to retain the shape of the bar during subsequent forging.

[0051] In some specific embodiments, the particle size range of the high-entropy alloy fragments is 0.1–0.5 mm. When the particle size of the high-entropy alloy fragments is less than 0.1 mm, the fragments are too fine, making processing difficult and prone to splashing or oxidation during crushing, affecting the purity and performance of the high-entropy alloy. When the particle size of the high-entropy alloy fragments is greater than 0.5 mm, the fragments cannot quickly penetrate into the gaps of the high-entropy alloy cable during subsequent melting, easily affecting the structural strength of the forging blank. A particle size range of 0.1–0.5 mm ensures that the fragments can be easily remelted during the smelting process, while also effectively penetrating into the gaps of the high-entropy alloy cable to form a good adhesive effect.

[0052] Preferably, the particle size range of high-entropy alloy fragments is 0.3 to 0.4 mm, which is easy to produce, and most of the fragments fall within this range when high-entropy alloy ingots are crushed.

[0053] S4. Take at least 3 of the high-entropy alloy bars and wind them into a high-entropy alloy cable, then bury the high-entropy alloy cable in the high-entropy alloy debris and heat it until it melts into one piece to obtain a forging blank.

[0054] High-entropy alloy fragments are first melted and filled into the gaps of the high-entropy alloy cable to form a forged blank with a special structure. In the subsequent production of high-entropy alloy sheets, special textures are formed, thereby introducing certain surface defects and grain boundaries, which can increase the catalytic active sites on the surface of the high-entropy alloy sheets.

[0055] In some specific embodiments, the mass ratio of the high-entropy alloy cable to the high-entropy alloy scrap is 1:1 to 2.5. The amount of high-entropy alloy scrap used is appropriate, which on the one hand ensures that the high-entropy alloy scrap can fully fill the gaps of the high-entropy alloy cable after melting, and on the other hand avoids that too much high-entropy alloy scrap will affect the structural strength of the forging blank.

[0056] Specifically, different ratios such as 1:1, 1:1.5, 1:2, or 1:2.5 can be selected. As the proportion of high-entropy alloy fragments increases, the structural strength of the obtained forging blank is higher, and it is less likely to fall apart during subsequent forging.

[0057] In some specific embodiments, the heating temperature of the high-entropy alloy fragments and the high-entropy alloy cable is controlled at 1400-1600°C, so that the high-entropy alloy fragments can be fully melted while the high-entropy alloy cable retains its original structural morphology.

[0058] Specifically, different temperatures such as 1400℃, 1500℃ or 1600℃ can be selected. The higher the heating temperature, the better the fusion of high-entropy alloy fragments and high-entropy alloy cables.

[0059] In some specific embodiments, six of the high-entropy alloy strips are wound into a high-entropy alloy cable, and the high-entropy alloy cable is wound into a disc and buried in the high-entropy alloy debris. It is then heated until it melts into one piece to obtain a block-shaped forging blank. Such a forging blank has higher strength and larger area, which is convenient for subsequent forging of large high-entropy alloy sheets.

[0060] S5. The forged blank is repeatedly heated and forged to produce a high-entropy alloy sheet;

[0061] By heating and forging the forged billet into a high-entropy alloy sheet, the texture of the high-entropy alloy can be well preserved. Introducing certain surface defects and grain boundaries into the high-entropy alloy sheet can increase the catalytic active sites on the surface of the high-entropy alloy sheet.

[0062] In some specific embodiments, the thickness of the high-entropy alloy sheet is in the range of 3 to 5 mm, which can ensure that the high-entropy alloy sheet has sufficient mechanical strength; preferably, the thickness of the high-entropy alloy sheet is 4 mm, which can maintain good mechanical properties without affecting electron transfer due to excessive thickness.

[0063] The high-entropy alloy sheet has a length range of 10-20 cm and a width range of 7-15 cm, which can provide sufficient reaction area and facilitate practical application and operation; preferably, the high-entropy alloy sheet has a length of 15 cm and a width of 11 cm, which can achieve a balance between ensuring sufficient catalytic reaction area and facilitating preparation and installation.

[0064] Specifically, the forging blank can be forged into a 3-5mm metal sheet, and then cut into high-entropy alloy sheets with a length of 10-20cm and a width of 7-15cm, which is convenient and quick.

[0065] S6. Immerse the high-entropy alloy sheet in an oxidizing solution for 5-10 minutes to obtain a high-entropy alloy water electrolysis catalyst.

[0066] By using an oxidizing solution to corrode and oxidize the surface of the high-entropy alloy sheet, not only can the surface morphology of the high-entropy alloy sheet be optimized, but also metal oxides can be formed on the surface of the high-entropy alloy sheet. The metal elements and metal oxides on the high-entropy alloy sheet can have a synergistic effect, thereby realizing the effective construction of active sites on the surface of the high-entropy alloy sheet.

[0067] In some specific embodiments, the oxidizing solution is an acidic potassium permanganate solution or an acidic potassium dichromate solution, which can effectively corrode and oxidize the surface of the high-entropy alloy sheet.

[0068] Specifically, the concentration range of the acidic potassium permanganate solution is 1-2 wt%, and the pH value range of the acidic potassium permanganate solution is 2-4, which has good corrosion and oxidation effects; preferably, the concentration of the acidic potassium permanganate solution is 1.5 wt%, and the pH value of the acidic potassium permanganate solution is 3, which has a good corrosion and oxidation effect on high entropy alloy sheets.

[0069] The concentration range of the acidic potassium dichromate solution is 5-6 wt%, and the pH range of the acidic potassium dichromate solution is 1-5, which has good corrosion and oxidation effects; preferably, the concentration of the acidic potassium dichromate solution is 5.5 wt%, and the pH value of the acidic potassium dichromate solution is 3, which has a good corrosion and oxidation effect on the high entropy alloy sheet.

[0070] In some specific embodiments, before immersing the high-entropy alloy sheet in an oxidizing solution, the method further includes forging the high-entropy alloy sheet to form a plurality of pits on its surface. Forging the high-entropy alloy sheet to form pits increases its specific surface area, providing more active sites; moreover, these pit structures increase the contact area between water and the catalytic material surface, which is beneficial for the water electrolysis reaction; simultaneously, the pit structure generates a local electric field enhancement effect, further promoting the water electrolysis reaction.

[0071] Furthermore, the pit structure can alter the electronic structure of the high-entropy alloy sheet surface, affecting its catalytic performance. By controlling the number and distribution of pits, the catalytic activity of the high-entropy alloy sheet can be optimized. This technique, combined with a subsequent immersion step in an oxidizing solution, can further optimize the morphology and chemical composition of the catalytic material surface, thereby improving the overall performance of the high-entropy alloy water electrolysis catalytic material.

[0072] Specifically, forging can be performed using a mechanical press, and the depth and density of the pits can be adjusted by controlling the pressure and the number of forgings; or a mold with a specific texture can be used for imprinting, which can form regularly distributed pits on the surface of the high-entropy alloy sheet; or an ultrasonic-assisted forging method can be used to form a micro-scale pit structure on the surface of the high-entropy alloy sheet by utilizing the vibration effect of ultrasound.

[0073] Furthermore, the depth of the pits can be controlled within the range of 500–1000 μm, the diameter within the range of 3000–5000 μm, and the pit density within the range of 4–9 pits / cm³. 2 The selection of these parameters, which can be adjusted, directly affects the specific surface area and the number of active sites of the material, thereby influencing its catalytic performance.

[0074] In the preparation method of the high-entropy alloy water electrolysis catalytic material of the present invention, by precisely controlling the composition of the high-entropy alloy, optimizing the preparation process and surface treatment, a high-entropy alloy catalytic material with specific composition and structure can be obtained, which can effectively increase the active sites on the surface of the high-entropy alloy water electrolysis catalytic material, thereby significantly improving the catalytic efficiency in the water electrolysis process.

[0075] The above provides a detailed description of a high-entropy alloy water electrolysis catalytic material and its preparation method provided by the embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A high-entropy alloy water electrolysis catalytic material, characterized in that, The high-entropy alloy water electrolysis catalytic material is a sheet structure, and main components of the sheet structure are Fe a Co b Ni c Cu x Mo y , according to atomic percentage, a+b+c+x+y=1, 60at.%≤a+b+c≤90at.%, 10at.%≤x+y≤40at.%, 20at.%≤a≤40at.%, 20at.%≤b≤40at.%, 10at.%≤c≤20at.%, 5at.%≤x≤35at.%, 5at.%≤y≤35at.%; The preparation method of the high-entropy alloy water electrolysis catalytic material comprises the following steps: S1, according to Fe a Co b Ni c Cu x Mo y According to the atomic ratio in each of S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21, S22, S23, S24, S25, S26, S27, S28, S29, S30, S31, S32, S33, S34, S2, repeatedly melting the mixed metal raw material in a vacuum induction melting furnace for 3-6 times, and injecting into a water-cooled copper mold to obtain a high-entropy alloy ingot; S3, taking a preset number of high-entropy alloy ingots to hot roll into high-entropy alloy strips, and taking a preset number of high-entropy alloy ingots to break into high-entropy alloy fragments; S4, taking at least 3 high-entropy alloy strips to wind into a high-entropy alloy cable, and burying the high-entropy alloy cable in the high-entropy alloy fragments, and heating to melt into one, to obtain a rough forging blank; S5, repeatedly heating and forging the rough forging blank to obtain a high-entropy alloy sheet; S6, soaking the high-entropy alloy sheet in an oxidizing solution for 5-10 minutes to obtain a high-entropy alloy water electrolysis catalytic material; The oxidizing solution is an acidic potassium permanganate solution or an acidic potassium dichromate solution.

2. The high-entropy alloy water electrolysis catalytic material of claim 1, wherein, The a is 30 at.%, the b is 30 at.%, the c is 15 at.%, the x is 15 at.%, and the y is 10 at.%. 3.The high-entropy alloy water electrolysis catalytic material of claim 1, wherein, In step S1, the diameter of the metal particles is less than or equal to 5 mm. 4.The high-entropy alloy water electrolysis catalytic material of claim 1, wherein, In step S2, the parameters of melting include: Before melting, the vacuum degree of the vacuum induction melting furnace is controlled in the range of 3.0 x 10 -2 ~ 6.0 x 10 -2 Pa; When melting, 50-60 kPa of nitrogen is filled into the vacuum induction melting furnace as a protective atmosphere; When melting, the intermediate frequency frequency range of the vacuum induction melting furnace is controlled to be 1500-2500 Hz; The melting time is controlled to be 1-3 minutes.

5. The high-entropy alloy water electrolysis catalytic material of claim 1, wherein, In step S3, the diameter of the high-entropy alloy strip is 3-6 mm, and the particle size of the high-entropy alloy fragment is 0.1-0.5 mm.

6. The high-entropy alloy water electrolysis catalytic material of claim 1, wherein, In step S4, the mass ratio of the high-entropy alloy cable to the high-entropy alloy fragment is 1:1-2.

5.

7. The high-entropy alloy water electrolysis catalytic material of claim 1, wherein, In step S5, the thickness of the high-entropy alloy sheet is 3-5 mm, the length of the high-entropy alloy sheet is 10-20 cm, and the width of the high-entropy alloy sheet is 7-15 cm.

8. The high-entropy alloy water electrolysis catalytic material of claim 1, wherein, Before step S6, it further comprises: Forging the high-entropy alloy sheet to form a plurality of pits on the surface of the high-entropy alloy sheet.

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