A phosphorus-doped molybdenum disulfide water electrolysis hydrogen production catalyst material, a preparation method therefor, and an application thereof
By using phosphorus-doped molybdenum disulfide electrolysis catalyst material for hydrogen production, the problems of high cost of precious metal catalysts and high power consumption of nickel-based materials have been solved, achieving efficient and low-cost hydrogen production through water electrolysis.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XIAN THERMAL POWER RES INST CO LTD
- Filing Date
- 2026-03-19
- Publication Date
- 2026-07-07
AI Technical Summary
Existing precious metal catalysts are expensive, while nickel-based materials have low catalytic activity and high power consumption, resulting in high costs for hydrogen production through water electrolysis, which makes it difficult to meet commercial needs.
A phosphorus-doped molybdenum disulfide electrolysis catalyst for hydrogen production was adopted. Through a three-dimensional nano-network structure and phosphorus doping treatment, the catalytic active sites and conductivity were improved, and the hydrogen evolution overpotential was reduced.
It significantly improves catalytic activity and reaction rate, reduces energy consumption for hydrogen production via water electrolysis, and provides an efficient and low-cost hydrogen production solution.
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Figure CN122344741A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of energy conversion technology for hydrogen production through water electrolysis, specifically relating to a phosphorus-doped molybdenum disulfide catalyst material for hydrogen production through water electrolysis, its preparation method, and its application. Background Technology
[0002] Hydrogen energy, as a clean and efficient secondary energy source, is considered one of the most promising energy forms to replace traditional fossil fuels due to its advantages such as renewability, pollution-free combustion products, zero emissions, high energy density, and ease of storage and transportation. Among various hydrogen production technologies, water electrolysis has received widespread attention from academia and industry in recent years because of its simple process, high product purity, and ability to be directly coupled with renewable "green electricity" such as wind and solar power to achieve truly zero-carbon emission hydrogen production.
[0003] In the process of hydrogen production through water electrolysis, the performance of the catalyst material is the core factor determining the techno-economic viability of the entire system. The activity, stability, and conductivity of the catalyst directly affect the manufacturing cost of the electrolysis equipment, the energy consumption level during operation, and the frequency of subsequent maintenance. Therefore, developing high-performance, low-cost catalysts for hydrogen production through water electrolysis has become a research hotspot in this field. Early research mainly focused on noble metal-based catalysts such as platinum, palladium, and iridium. These materials possess excellent conductivity and extremely low hydrogen evolution overpotential, exhibiting very high catalytic activity. However, the scarcity and high price of noble metal resources lead to high catalyst costs, severely restricting their widespread application in large-scale industrial water electrolysis hydrogen production plants and failing to meet commercial needs.
[0004] To address the cost issue of precious metal catalysts, researchers have turned their attention to non-precious metal-based catalytic materials. Currently, nickel-based materials such as nickel mesh, nickel foam, and nickel-plated iron plates are the most common cathode catalysts in large-scale water electrolysis hydrogen production technologies. These materials have advantages such as mature preparation processes, low raw material costs, and structural stability at high current densities. However, nickel-based materials exhibit low intrinsic catalytic activity and high hydrogen evolution overpotential, leading to the need for more electrical energy to drive the reaction in actual electrolysis processes. According to existing operating data, industrial alkaline water electrolysis hydrogen production units using traditional non-precious metal catalysts such as nickel mesh have a low production per unit volume of hydrogen (Nm³). 3 The power consumption of hydrogen production is typically as high as 4.5-5.5 kWh, and this high energy consumption has become a key technological bottleneck that limits the further reduction of hydrogen production costs and the enhancement of market competitiveness. Summary of the Invention
[0005] In order to overcome the shortcomings of the prior art, the present invention aims to provide a phosphorus-doped molybdenum disulfide electrolysis water production catalyst material, its preparation method and application, so as to solve the technical problems of difficulty in balancing catalyst cost and catalytic activity and high power consumption of traditional nickel-based materials in the prior art.
[0006] To achieve the above objectives, the present invention employs the following technical solution: In a first aspect, the present invention provides a phosphorus-doped molybdenum disulfide electrolysis catalyst material for hydrogen production, characterized in that it comprises a molybdenum disulfide matrix having a three-dimensional nano-network structure, and phosphorus atoms and / or phosphorus ions doped in the molybdenum disulfide matrix.
[0007] A further improvement of the present invention is that the material is used at a current density of 10 mA / cm². 2 The hydrogen evolution overpotential is 85-140 mV.
[0008] Secondly, the present invention also provides a method for preparing a phosphorus-doped molybdenum disulfide electrolysis catalyst material for hydrogen production, comprising the following steps: Step 1: Dissolve the molybdenum source and sulfur source in deionized water to prepare a precursor solution; Step 2: The precursor solution is subjected to a hydrothermal reaction to obtain molybdenum disulfide material; Step 3: The molybdenum disulfide material is subjected to phosphorus doping treatment to obtain phosphorus-doped molybdenum disulfide electrolysis water production hydrogen catalyst material.
[0009] A further improvement of the present invention is that, in step 1, the molybdenum source is ammonium molybdate and the sulfur source is thiourea.
[0010] A further improvement of the present invention is that, in step 2, the temperature of the hydrothermal reaction is 160-220℃ and the time is 16-30h.
[0011] A further improvement of the present invention is that the molar amount of the molybdenum source is 1-5 mmol, the molar amount of the sulfur source is 20-30 mmol, and the amount of deionized water is 35 ml.
[0012] A further improvement of the present invention is that, in step 3, the phosphorus doping treatment specifically includes: The phosphorus powder and the molybdenum disulfide material obtained in step 2 were placed in different temperature zones of a tube furnace. Under low pressure or vacuum conditions, the temperature zone containing the phosphorus powder is heated to 200-400°C, and the temperature zone containing the molybdenum disulfide material is heated to 400-600°C, and held for 30-120 minutes.
[0013] A further improvement of the present invention is that it also includes hydrogen plasma activation treatment on the phosphorus-doped molybdenum disulfide electrolysis hydrogen production catalyst material obtained in step 3. The hydrogen plasma activation treatment specifically includes: The phosphorus-doped molybdenum disulfide electrolysis hydrogen production catalyst material obtained in step 3 was placed in a vacuum chamber, and a mixture of nitrogen and hydrogen gas was introduced for plasma surface treatment.
[0014] A further improvement of the present invention is that the volume ratio of hydrogen to nitrogen in the mixed gas is (1-2):(4-9).
[0015] Thirdly, the present invention also provides an electrolytic water hydrogen production apparatus, comprising the phosphorus-doped molybdenum disulfide electrolytic water hydrogen production catalyst material as described above.
[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a phosphorus-doped molybdenum disulfide (MoD) electrolysis catalyst for hydrogen production. This material, through its unique three-dimensional nanostructure, significantly increases the edge exposure of the MoD matrix, thereby providing abundant catalytic active sites and greatly enhancing its catalytic activity. Simultaneously, the phosphorus atoms and / or phosphorus ions doped into the matrix effectively modulate the electronic structure of MoD, enhancing the material's adsorption capacity for hydrogen atoms, thus reducing the hydrogen evolution overpotential and improving the efficiency of water electrolysis for hydrogen production. Furthermore, phosphorus doping also induces the transformation of the MoD portion into the metallic 1T phase. This phase transition significantly improves the material's conductivity, facilitating rapid electron transport within the material and accelerating the reaction rate of water electrolysis for hydrogen production. In summary, this catalyst material exhibits excellent catalytic activity and reaction kinetics in the water electrolysis process for hydrogen production, providing a feasible material solution for efficient and low-cost hydrogen production.
[0017] This invention also provides a method for preparing a phosphorus-doped molybdenum disulfide (MoD) electrolysis catalyst for hydrogen production. First, a precursor solution is prepared by dissolving a molybdenum source and a sulfur source in deionized water, followed by a hydrothermal reaction. Utilizing the simplicity and controllability of the hydrothermal synthesis process, a MoD material with a three-dimensional nano-network structure can be efficiently prepared. This structure fully exposes the material edges, providing a large number of unsaturated sulfur atoms as catalytic active sites, significantly enhancing the intrinsic catalytic activity of the material. Furthermore, the raw materials are widely available and inexpensive, making it suitable for large-scale production. Subsequently, the prepared MoD material is subjected to phosphorus doping treatment. Through a high-temperature phosphating process, phosphorus atoms and / or phosphorus ions are introduced into the MoD matrix. On the one hand, phosphorus doping can effectively regulate the electronic structure of MoD, enhancing the material's adsorption capacity for hydrogen atoms, thereby reducing the hydrogen evolution overpotential. On the other hand, the high-temperature treatment during phosphorus doping also promotes the transformation of some MoD from the semiconductor 2H phase to the metallic 1T phase, significantly improving the material's conductivity and facilitating rapid electron transport within the material, thus accelerating the reaction rate of water electrolysis for hydrogen production. This preparation method combines hydrothermal synthesis with phosphorus doping, resulting in a catalyst material with abundant active sites, optimized electronic structure, and excellent conductivity, showing promising application prospects in the field of water electrolysis for hydrogen production. Attached Figure Description
[0018] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components.
[0019] Figure 1 The images show the scanning electron microscope (SEM) morphology and energy dispersive spectroscopy (EDS) surface scan images of the phosphorus-doped molybdenum disulfide electrolysis hydrogen production catalyst material of the present invention. a is an EDS layered superimposed image, b is a SEM morphology image, c is an EDS surface scan distribution map of S element, d is an EDS surface scan distribution map of Mo element, and e is an EDS surface scan distribution map of P element. Detailed Implementation
[0020] To enable those skilled in the art to understand the features and effects of the present invention, the terms and expressions used in the specification and claims are explained and defined in general below. Unless otherwise specified, all technical and scientific terms used herein have the ordinary meaning understood by those skilled in the art regarding the present invention, and in case of conflict, the definitions in this specification shall prevail.
[0021] The theories or mechanisms described and disclosed herein, whether right or wrong, should not in any way limit the scope of the invention, that is, the contents of the invention can be implemented without being limited by any particular theory or mechanism.
[0022] In this document, all features defined by numerical ranges or percentage ranges, such as numerical values, quantities, contents, and concentrations, are for the sake of brevity and convenience only. Accordingly, descriptions of numerical ranges or percentage ranges should be considered as covering and specifically disclosing all possible sub-ranges and individual numerical values (including integers and fractions) within those ranges.
[0023] In this article, unless otherwise specified, “contains,” “includes,” “containing,” “has,” or similar terms cover the meanings of “composed of” and “mainly composed of,” for example, “A contains a” covers the meanings of “A contains a and others” and “A contains only a.”
[0024] For the sake of brevity, not all possible combinations of the technical features in each implementation scheme or embodiment are described herein. Therefore, as long as there is no contradiction in the combination of these technical features, the technical features in each implementation scheme or embodiment can be combined arbitrarily, and all possible combinations should be considered within the scope of this specification.
[0025] The present invention provides a phosphorus-doped molybdenum disulfide electrolysis catalyst material for hydrogen production, comprising a molybdenum disulfide matrix having a three-dimensional nano-network structure, and phosphorus atoms and / or phosphorus ions doped in the molybdenum disulfide matrix.
[0026] Specifically, the phosphorus-doped molybdenum disulfide electrolysis catalyst material for hydrogen production is used at a current density of 10 mA / cm². 2 The hydrogen evolution overpotential is 85-140 mV.
[0027] This invention also provides a method for preparing a phosphorus-doped molybdenum disulfide electrolysis catalyst for hydrogen production, comprising the following steps: Step 1: Dissolve the molybdenum source and the sulfur source in deionized water to prepare a precursor solution; wherein the molybdenum source is ammonium molybdate, the sulfur source is thiourea, and the molar amount of the molybdenum source is 1. 5 mmol, the molar amount of the sulfur source is 20. 30 mmol, the amount of deionized water used is 35 ml; Step 2: The precursor solution is subjected to a hydrothermal reaction to obtain molybdenum disulfide material; wherein the hydrothermal reaction temperature is 160°C. 220℃, for 16 minutes 30 hours; Step 3: Perform phosphorus doping treatment on the molybdenum disulfide material to obtain phosphorus-doped molybdenum disulfide electrolysis hydrogen production catalyst material; the phosphorus doping treatment specifically includes: placing phosphorus powder and the molybdenum disulfide material obtained in step 2 in different temperature zones of a tube furnace, and heating the temperature zone containing the phosphorus powder to 200°C under low pressure or vacuum conditions. The temperature range in which the molybdenum disulfide material is located is heated to 400°C. 600℃, hold for 30 minutes 120 min; Step 4: Perform hydrogen plasma activation treatment on the phosphorus-doped molybdenum disulfide electrolysis catalyst material obtained in Step 3; the hydrogen plasma activation treatment specifically includes: placing the phosphorus-doped molybdenum disulfide electrolysis catalyst material obtained in Step 3 in a vacuum chamber, introducing a mixed gas of nitrogen and hydrogen, and performing plasma surface treatment, wherein the volume ratio of hydrogen to nitrogen in the mixed gas is (1:1). 2): (4) 9).
[0028] The present invention also provides an electrolytic water hydrogen production device, comprising the above-mentioned phosphorus-doped molybdenum disulfide electrolytic water hydrogen production catalyst material.
[0029] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.
[0030] The following examples use instruments and equipment conventional in the art. Experimental methods in the following examples, unless otherwise specified, are generally performed under conventional conditions or as recommended by the manufacturer. All raw materials used in the following examples are conventional commercially available products with specifications conventional in the art. In this specification and the following examples, unless otherwise specified, "%" represents weight percentage, "parts" represents parts by weight, and "ratio" represents weight proportion.
[0031] Example 1 This embodiment provides a method for preparing a phosphorus-doped molybdenum disulfide electrolysis catalyst for hydrogen production, including the following steps: Step 1, Preparation of molybdenum disulfide precursor solution: Dissolve 1 mmol of ammonium molybdate tetrahydrate and 30 mmol of thiourea in 35 ml of deionized water, and stir magnetically for 30 min to ensure uniform dispersion of the solution, thus obtaining the molybdenum disulfide precursor solution.
[0032] Step 2, preparation of molybdenum disulfide by hydrothermal method: The molybdenum disulfide precursor solution is transferred to a hydrothermal reactor and reacted at 180°C for 18 hours, then cooled to room temperature.
[0033] Step 3, cleaning of molybdenum disulfide material: Centrifuge the hydrothermal reaction solution of molybdenum disulfide to remove the reaction solution and take the molybdenum disulfide precipitate; wash the molybdenum disulfide precipitate repeatedly with deionized water 3 times to remove impurities and obtain molybdenum disulfide material.
[0034] Step 4, Phosphorus doping treatment of molybdenum disulfide material: Take 5g of phosphorus powder and molybdenum disulfide material and place them in an evaporating dish. Place the phosphorus powder and molybdenum disulfide material in the two temperature zones on both sides of a tube furnace. Evacuate the tube furnace to a low-pressure or vacuum state. Set the temperature zone for phosphorus powder to 300℃ and the temperature zone for molybdenum disulfide material to 550℃. Perform phosphorus doping treatment on the molybdenum disulfide material for 60 minutes. After the phosphorus doping treatment is completed, cool it to room temperature under low pressure or vacuum to obtain phosphorus-doped molybdenum disulfide material.
[0035] The steps for post-processing catalyst materials are as follows: Step 1, Activation treatment of phosphorus-doped molybdenum disulfide material: The phosphorus-doped molybdenum disulfide material is placed in a vacuum chamber, and a mixture of nitrogen and hydrogen gas is introduced into the vacuum chamber. The volume fraction ratio of nitrogen to hydrogen is 9:1. Plasma surface treatment is performed for 10 minutes.
[0036] Step 2, Performance Evaluation of the Phosphorus-Doped Molybdenum Disulfide Electrolysis Catalyst for Hydrogen Production: Electrochemical tests were conducted on an electrochemical workstation, using a three-electrode setup to test the catalyst's catalytic activity. The phosphorus-doped molybdenum disulfide electrolysis catalyst material exhibited good performance at a current density of 10 mA / cm². 2 The overpotential at that time was 97mV.
[0037] Figure 1 The microstructure and elemental distribution characterization results are shown for the phosphorus-doped molybdenum disulfide electrolysis hydrogen production catalyst material prepared in Example 1 of this invention. Figure 1 In Figures a and b, it can be observed that the prepared material exhibits a typical three-dimensional nano-network structure. This structure is composed of a large number of interconnected nanosheets, which fully exposes the edges of the material, thus providing more catalytic active sites. Figure 1 The CE diagrams show the energy dispersive spectral density (EDS) distributions of S, Mo, and P, respectively. The figures demonstrate that Mo and S are uniformly distributed throughout the material framework, with their distribution areas highly overlapping, indicating the successful synthesis of a molybdenum disulfide matrix material. Of particular note is... Figure 1 The results show that phosphorus (P) is also uniformly distributed in the three-dimensional network structure of the material, and its distribution area perfectly matches that of Mo and S. This result confirms that phosphorus atoms and / or phosphorus ions have been successfully doped into the interior of the molybdenum disulfide matrix, rather than merely physically adsorbed on the material surface. Combining morphology and elemental distribution information, Figure 1 This demonstrates that the method of the present invention successfully prepared a molybdenum disulfide catalyst material with a three-dimensional nano-network structure and uniform phosphorus doping, providing a structural basis for the excellent catalytic performance of this material in water electrolysis to produce hydrogen.
[0038] Example 2 This embodiment provides a method for preparing a phosphorus-doped molybdenum disulfide electrolysis catalyst for hydrogen production, including the following steps: Step 1, Preparation of molybdenum disulfide precursor solution: Dissolve 3 mmol of ammonium molybdate tetrahydrate and 25 mmol of thiourea in 35 ml of deionized water, and stir magnetically for 60 min to ensure uniform dispersion of the solution, thus obtaining the molybdenum disulfide precursor solution.
[0039] Step 2, preparation of molybdenum disulfide by hydrothermal method: The molybdenum disulfide precursor solution is transferred to a hydrothermal reactor and reacted at 200°C for 24 hours, then cooled to room temperature.
[0040] Step 3, cleaning of molybdenum disulfide material: Centrifuge the hydrothermal reaction solution of molybdenum disulfide to remove the reaction solution and take the molybdenum disulfide precipitate; wash the molybdenum disulfide precipitate repeatedly with deionized water 3 times to remove impurities and obtain molybdenum disulfide material.
[0041] Step 4, Phosphorus doping treatment of molybdenum disulfide material: Take 3g of phosphorus powder and molybdenum disulfide material and place them in an evaporating dish. Place the phosphorus powder and molybdenum disulfide material in the two temperature zones on both sides of a tube furnace. Evacuate the tube furnace to a low-pressure or vacuum state. Set the temperature zone for phosphorus powder to 300℃ and the temperature zone for molybdenum disulfide material to 450℃. Perform phosphorus doping treatment on the molybdenum disulfide material for 120min. After the phosphorus doping treatment is completed, cool to room temperature under low pressure or vacuum to obtain phosphorus-doped molybdenum disulfide material.
[0042] The steps for post-processing catalyst materials are as follows: Step 1, Activation treatment of phosphorus-doped molybdenum disulfide material: The phosphorus-doped molybdenum disulfide material is placed in a vacuum chamber, and a mixture of nitrogen and hydrogen gas is introduced into the vacuum chamber. The volume fraction ratio of nitrogen to hydrogen is 8:2. Plasma surface treatment is performed for 10 minutes.
[0043] Step 2: Performance evaluation of the phosphorus-doped molybdenum disulfide electrolysis catalyst for hydrogen production. Electrochemical tests were conducted on an electrochemical workstation, using a three-electrode method to test the catalyst's catalytic activity. The phosphorus-doped molybdenum disulfide electrolysis catalyst for hydrogen production exhibited good performance at a current density of 10 mA / cm². 2 The overpotential at that time was 105mV.
[0044] Example 3 This embodiment provides a method for preparing a phosphorus-doped molybdenum disulfide electrolysis catalyst for hydrogen production, including the following steps: Step 1, Preparation of molybdenum disulfide precursor solution: Dissolve 5 mmol of ammonium molybdate tetrahydrate and 20 mmol of thiourea in 35 ml of deionized water, and stir magnetically for 45 min to ensure uniform dispersion of the solution, thus obtaining the molybdenum disulfide precursor solution.
[0045] Step 2, preparation of molybdenum disulfide by hydrothermal method: The molybdenum disulfide precursor solution is transferred to a hydrothermal reactor and reacted at 220°C for 30 hours, then cooled to room temperature.
[0046] Step 3, cleaning of molybdenum disulfide material: Centrifuge the hydrothermal reaction solution of molybdenum disulfide to remove the reaction solution and take the molybdenum disulfide precipitate; wash the molybdenum disulfide precipitate repeatedly with deionized water 3 times to remove impurities and obtain molybdenum disulfide material.
[0047] Step 4, Phosphorus doping treatment of molybdenum disulfide material: Take 4g of phosphorus powder and molybdenum disulfide material and place them in an evaporating dish. Place the phosphorus powder and molybdenum disulfide material in the two temperature zones on both sides of a tube furnace. Evacuate the tube furnace to a low-pressure or vacuum state. Set the temperature zone for phosphorus powder to 350℃ and the temperature zone for molybdenum disulfide material to 400℃. Perform phosphorus doping treatment on the molybdenum disulfide material for 40 minutes. After the phosphorus doping treatment is completed, cool it to room temperature under low pressure or vacuum to obtain phosphorus-doped molybdenum disulfide material.
[0048] The steps for post-processing catalyst materials are as follows: Step 1, Activation treatment of phosphorus-doped molybdenum disulfide material: The phosphorus-doped molybdenum disulfide material is placed in a vacuum chamber, and a mixture of nitrogen and hydrogen gas is introduced into the vacuum chamber. The volume fraction ratio of nitrogen to hydrogen is 8:1. Plasma surface treatment is performed for 10 minutes.
[0049] Step 2, Performance Evaluation of the Phosphorus-Doped Molybdenum Disulfide Electrolysis Catalyst for Hydrogen Production: Electrochemical tests were conducted on an electrochemical workstation, using a three-electrode setup to test the catalyst's catalytic activity. The phosphorus-doped molybdenum disulfide electrolysis catalyst material exhibited good performance at a current density of 10 mA / cm². 2 The overpotential at that time was 110mV.
[0050] Comparative Example 1 This comparative example provides a method for preparing a molybdenum disulfide catalyst material without phosphorus doping and plasma activation, using a conventional hydrothermal synthesis method. The preparation steps are as follows: Step 1, Preparation of molybdenum disulfide precursor solution: Dissolve 3 mmol of ammonium molybdate tetrahydrate and 25 mmol of thiourea in 35 ml of deionized water, and stir magnetically for 60 min to ensure uniform dispersion of the solution, thus obtaining the molybdenum disulfide precursor solution.
[0051] Step 2, preparation of molybdenum disulfide by hydrothermal method: The molybdenum disulfide precursor solution is transferred to a hydrothermal reactor and reacted at 200°C for 24 hours, then cooled to room temperature.
[0052] Step 3, cleaning of molybdenum disulfide material: Centrifuge the hydrothermal reaction solution of molybdenum disulfide to remove the reaction solution and take the molybdenum disulfide precipitate; wash the molybdenum disulfide precipitate repeatedly with deionized water 3 times to remove impurities, and dry it in a vacuum drying oven at 60℃ for 12 hours to obtain molybdenum disulfide material.
[0053] Step 4, Catalyst Performance Evaluation: The same electrochemical testing method as in the examples was used, with three-electrode testing performed on an electrochemical workstation. The unmodified molybdenum disulfide catalyst material prepared in this comparative example was tested at a current density of 10 mA / cm². 2 The hydrogen evolution overpotential at that time was 285mV.
[0054] Test results show that the hydrogen evolution overpotential of the unmodified molybdenum disulfide material is as high as 285 mV, which is much higher than the 97-110 mV of the embodiments of the present invention. This comparison clearly demonstrates that the present invention significantly reduces the hydrogen evolution overpotential of the molybdenum disulfide material and greatly improves its catalytic activity for hydrogen production by water electrolysis through phosphorus doping treatment and hydrogen plasma activation treatment.
[0055] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.
Claims
1. A phosphorus-doped molybdenum disulfide electrolysis catalyst material for hydrogen production, characterized in that, It includes a molybdenum disulfide matrix having a three-dimensional nano-network structure, and phosphorus atoms and / or phosphorus ions doped in the molybdenum disulfide matrix.
2. The phosphorus-doped molybdenum disulfide electrolysis catalyst material for hydrogen production according to claim 1, characterized in that, The material operates at a current density of 10 mA / cm². 2 The hydrogen evolution overpotential is 85-140 mV.
3. A method for preparing a phosphorus-doped molybdenum disulfide electrolysis catalyst material for hydrogen production as described in any one of claims 1 to 2, characterized in that, Includes the following steps: Step 1: Dissolve the molybdenum source and sulfur source in deionized water to prepare a precursor solution; Step 2: The precursor solution is subjected to a hydrothermal reaction to obtain molybdenum disulfide material; Step 3: The molybdenum disulfide material is subjected to phosphorus doping treatment to obtain phosphorus-doped molybdenum disulfide electrolysis water production hydrogen catalyst material.
4. The preparation method of a phosphorus-doped molybdenum disulfide electrolysis water production hydrogen catalyst material according to claim 3, characterized in that, In step 1, the molybdenum source is ammonium molybdate, and the sulfur source is thiourea.
5. The method for preparing a phosphorus-doped molybdenum disulfide electrolysis catalyst for hydrogen production according to claim 3, characterized in that, In step 2, the hydrothermal reaction is carried out at a temperature of 160-220℃ for 16-30 hours.
6. The method for preparing a phosphorus-doped molybdenum disulfide electrolysis catalyst for hydrogen production according to claim 3, characterized in that, The molar amount of the molybdenum source is 1-5 mmol, the molar amount of the sulfur source is 20-30 mmol, and the amount of deionized water is 35 ml.
7. The preparation method of a phosphorus-doped molybdenum disulfide electrolysis water production hydrogen catalyst material according to claim 3, characterized in that, Step 3, specifically includes the phosphorus doping treatment: The phosphorus powder and the molybdenum disulfide material obtained in step 2 were placed in different temperature zones of a tube furnace. Under low pressure or vacuum conditions, the temperature zone containing the phosphorus powder is heated to 200-400°C, and the temperature zone containing the molybdenum disulfide material is heated to 400-600°C, and held for 30-120 minutes.
8. The method for preparing a phosphorus-doped molybdenum disulfide electrolysis catalyst for hydrogen production according to claim 3, characterized in that, It also includes hydrogen plasma activation treatment of the phosphorus-doped molybdenum disulfide electrolytic water production catalyst material obtained in step 3. The hydrogen plasma activation treatment specifically includes: The phosphorus-doped molybdenum disulfide electrolysis hydrogen production catalyst material obtained in step 3 was placed in a vacuum chamber, and a mixture of nitrogen and hydrogen gas was introduced for plasma surface treatment.
9. The method for preparing a phosphorus-doped molybdenum disulfide electrolysis catalyst for hydrogen production according to claim 3, characterized in that, The volume ratio of hydrogen to nitrogen in the mixed gas is (1-2):(4-9).
10. A device for producing hydrogen through water electrolysis, characterized in that, It comprises a phosphorus-doped molybdenum disulfide electrolysis catalyst material for hydrogen production as described in any one of claims 1 to 2.