Method for preparing high-activity water electrolysis hydrogen production catalyst

Abstract

The invention discloses a method for preparing a high-activity water electrolysis hydrogen production catalyst in the field of catalyst preparation. The method comprises the following steps: S1, preparing a polyhedral silicon template by a thermal decomposition method; s2, the polyhedral silicon template is etched to form holes, and a porous silicon template is prepared; s3, preparing MoO3-x (OH) x by an electro-deposition method: connecting the porous silicon template with a cathode of a power supply, and electro-depositing molybdenum on the porous structure of the porous silicon template by taking ammonium molybdate as an electrolyte to prepare MoO3-x (OH) x; s4, vulcanizing MoO < 3-x > (OH) < x > to prepare porous molybdenum disulfide; s5, porous molybdenum disulfide is doped with Co, and the MOS2 / Co catalyst is prepared. According to the scheme, an electrochemical method is combined with a mechanical structure for etching and trepanning, the porous silicon precursor with uniform pore diameter can be prepared, and a stable structure is provided for subsequent preparation of a catalyst.

Description

Technical Field

[0001] The invention belongs to the field of catalyst preparation, and specifically relates to a method for preparing a high-activity water electrolysis hydrogen production catalyst. Background Art

[0002] As a "green energy" with abundant resources and no secondary pollution, hydrogen energy is considered to be one of the ideal energy sources to solve the energy crisis and environmental crisis in the post-petroleum era. Among them, water electrolysis hydrogen evolution technology has gradually become a research hotspot due to its high efficiency, easy control, and pollution-free reaction. The products obtained by water electrolysis hydrogen evolution technology are clean and high in purity, and electrical energy can also be indirectly stored as chemical energy for use. In fuel cells, catalysts are used to convert hydrogen energy into electrical energy to achieve sustainable recycling of resources.

[0003] The patent with announcement number CN108315758B discloses a catalyst for producing hydrogen by electrolysis of water and a preparation method thereof, the method comprising: dissolving cobalt nitrate and sodium citrate in water to form solution A; dissolving potassium ferrocyanide in water to form solution B; fully mixing solution A and solution B under stirring, aging at room temperature for at least 24 hours, and then separating to obtain a precipitate, washing with water and ethanol respectively, and drying to obtain a precursor; heating the obtained precursor to 600-750°C in an inert atmosphere and calcining for at least 1 hour, collecting the calcined product to obtain the first structure. The second structure is obtained by further soaking with inorganic acid on the basis of the first structure.

[0004] This patent adopts a hydrothermal method when preparing the catalyst, which is prone to uneven hydrolysis and difficult to produce a porous structure with uniform particle size. Therefore, we propose a method for preparing a highly active water electrolysis hydrogen production catalyst. Summary of the invention

[0005] The purpose of the present invention is to provide a method for preparing a highly active water electrolysis hydrogen production catalyst, so as to solve the problem that the prior art adopts a hydrothermal method when preparing the catalyst, which is prone to uneven hydrolysis and difficult to obtain a porous structure with uniform particle size.

[0006] In order to achieve the above object, the technical scheme of the present invention is as follows: A method for preparing a highly active water electrolysis hydrogen production catalyst comprises the following steps:

[0007] S1. Preparation of polyhedral silicon template by thermal decomposition method:

[0008] S11, cleaning the template and polishing it, dissolving the silicon precursor in an organic solvent to prepare a silicon precursor solution;

[0009] S12. Connect the clamping device and the spraying device: the clamping device includes a support plate, the support plate is fixedly connected to a cylinder, the output end of the cylinder is fixedly connected to a movable plate, a cross slide groove is provided on the movable plate, a support frame is installed on the movable plate, a first motor is fixedly connected to the support frame on the side close to the movable plate, a first connecting rod is fixedly connected to the output end of the first motor, the first connecting rod is perpendicular to the output end of the first motor, a second connecting rod is hinged to the end of the first connecting rod away from the first motor, and the first connecting rod is hinged to the second connecting rod at one-third of the distance from the first motor, a clamping claw is hinged to the end of the second connecting rod, a slider is fixedly connected to the second connecting rod at two-thirds of the distance from the first motor, and the slider is slidably matched with the cross slide groove;

[0010] S13, spraying a silicon precursor film: injecting a silicon precursor solution into a spraying device, driving a cylinder to move the clamping jaws in a translational manner, and spraying the silicon precursor solution on the template to form a silicon precursor film;

[0011] S14, thermally decomposing the silicon precursor film: placing the template covered with the silicon precursor film in a high temperature furnace, and thermally decomposing it at 350-450° C. to obtain a silicon template;

[0012] S2. Etching holes in the polyhedral silicon template to obtain a porous silicon template: injecting an etching gas flow into a spraying device to drive the cylinder and the first motor, changing the displacement of the cylinder and the direction of the first motor, so that the polyhedral silicon template moves in a curved manner, and the etching gas flow etches a porous structure on the polyhedral silicon template through the spraying device to obtain a porous silicon template;

[0013] S3. Preparation of MoO by Electrodeposition 3-x (OH) x :The clamping device is installed above the electrolytic cell, and the clamping claws hold the porous silicon template and move in a curve, which is intermittently connected to the cathode of the power supply. Ammonium molybdate is used as the electrolyte to electrodeposit molybdenum on the porous structure of the porous silicon template to obtain MoO 3-x (OH) x ;

[0014] S4、MoO 3-x (OH) x Porous molybdenum disulfide is obtained by sulfidation;

[0015] S5, porous molybdenum disulfide doped with Co to make MOS 2 / Co catalyst.

[0016] The principle and beneficial effects of this program:

[0017] This scheme uses a spraying device to evenly spray the silicon precursor solution on the template, and then uses etching to open holes in the silicon template to obtain a porous silicon template with stable structure and uniform pore size. Molybdenum is deposited on the porous silicon template by electrodeposition, and then sulfurized, doped and pyrolyzed to obtain MOS with excellent catalytic performance and stable structure.2 / Co catalyst.

[0018] This solution only realizes the translation of the clamp when the cylinder is started. When the first motor is started, the first motor drives the first connecting rod to rotate. Since the slider slides in the cross slot to limit the first connecting rod, the first connecting rod moves in a curve around the moving plate. By changing the displacement of the cylinder and the direction of the first motor, the curved movement of the polyhedral silicon template is realized. Compared with the hydrothermal method to prepare porous structures, this solution uses electrochemical methods combined with mechanical structures to etch and open holes, which can produce porous silicon precursors with uniform pore sizes, providing a stable structure for the subsequent preparation of catalysts. Compared with the singleness of the hydrothermal method to prepare porous structures, the curved movement of the polyhedral silicon template can realize openings of various shapes during etching. This solves the problem that the prior art uses the hydrothermal method to prepare catalysts, which is prone to uneven hydrolysis and difficult to produce porous structures with uniform particle sizes.

[0019] In addition, the devices in this solution cooperate with each other to achieve multiple uses of one machine, reduce equipment costs and improve equipment utilization.

[0020] Furthermore, the spraying device in S12 includes a feed tube and a radiation tube, the feed tube and the radiation tube are coaxially provided with a feed channel, the outer wall of the feed tube is symmetrically provided with a first groove, the inner wall of the radiation tube is symmetrically provided with a second groove, the first groove and the second groove are both hemispherical, the first groove and the second groove are combined to form a spherical groove, the spherical groove has a limiting ball built in, the limiting ball is in conflict with the spherical groove, and one side of the limiting ball is hinged to the radiation tube through a connecting piece.

[0021] Beneficial effect: Since a limiting ball is placed in the spherical groove between the feeding tube and the radiation tube, the impact of the liquid or airflow causes the radiation tube to rotate slightly, so that the liquid or airflow passing through the feeding channel is in a circle shape when sprayed out, thereby increasing the scattering surface of the liquid or airflow and improving the processing efficiency.

[0022] Furthermore, the inner diameter of the feeding channel in S12 increases from top to bottom.

[0023] Beneficial effect: The inner diameter of the feeding channel increases from top to bottom, making the feeding channel trumpet-shaped, which increases its scattering area under equal volume of liquid or airflow and improves processing efficiency.

[0024] Furthermore, the feeding channel in S12 is rotatably connected with fan blades.

[0025] Beneficial effect: Since a limiting ball is placed in the spherical groove between the feeding tube and the radiation tube, the impact of the liquid or airflow causes the radiation tube to rotate slightly, causing the fan blades to rotate in the same direction, so that the liquid or airflow passing through the feeding channel is in a circle shape when sprayed out, thereby increasing the scattering surface of the liquid or airflow and improving processing efficiency.

[0026] Furthermore, the working parameters of the electrodeposition in S3 are: the electrodeposition is carried out for 0.5-60 minutes with a current density of 0.1-400 mA per square centimeter of the deposition area.

[0027] Furthermore, the MoO in S4 3-x (OH) x The molybdenum disulfide is prepared by sequentially placing the molybdenum disulfide and the sulfur powder into a reactor and performing a sulfurization reaction at 400-800°C to obtain porous molybdenum disulfide.

[0028] Further, the reactor includes a shell, the upper part of the shell side wall is connected to a feed pipe, the top and bottom of the shell are respectively connected to an exhaust pipe and a discharge pipe, the discharge pipe can be connected to the feed pipe, the shell is slidably matched with a grinding disc, the grinding disc is funnel-shaped, a plurality of grinding balls are rotatably connected to the inner wall of the grinding disc, a heating component is arranged in the grinding balls, a hollow rotating shaft is connected to the bottom of the grinding disc, the hollow rotating shaft is located above the discharge port, the hollow rotating shaft is sequentially connected to a valve and a reciprocating drive component from top to bottom, and the reciprocating drive component is used to drive the grinding disc to reciprocate and shake;

[0029] The reciprocating drive assembly includes a cylindrical cam and a first bevel gear mounted on a hollow rotating shaft. The cylindrical cam is fixedly connected to the inner wall of the shell through a support rod. The first bevel gear is meshed with a second bevel gear. The second bevel gear is coaxially fixedly connected to a second motor. The second motor is fixedly connected to the inner wall of the shell.

[0030] Beneficial effect: The rotation of the second motor can drive the first bevel gear and the second bevel gear to rotate, thereby transmitting power to the hollow shaft. Due to the limit of the cylindrical cam on the hollow shaft, the hollow shaft can also reciprocate vertically when rotating, thereby driving the grinding disc to slide and rotate vertically at the same time. The heating component in the grinding ball can effectively heat the sulfur powder and MoO 3-x (OH) x While heating, sulfur powder and MoO 3-x (OH) x Flip it so that the heat is evenly distributed, which can shorten the sulfurization reaction time and produce porous molybdenum disulfide faster.

[0031] Further, in S5, the cobalt chloride solution and porous molybdenum disulfide are sequentially placed in a reactor and pyrolyzed at 300-500° C. to obtain MOS 2 / Co catalyst. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the process of preparing a highly active water electrolysis hydrogen production catalyst according to an embodiment of the present invention.

[0033] Figure 2 Schematic diagram of the structure of a clamping device according to an embodiment of the present invention.

[0034] Figure 3 2 is a cross-sectional view of a spraying device according to an embodiment of the present invention.

[0035] Figure 4 4 is a cross-sectional view of a reactor according to an embodiment of the present invention.

[0036] The figure marks in the drawings of the specification include: support plate 1, cylinder 2, movable plate 3, cross slide 301, support frame 302, first motor 303, first connecting rod 304, second connecting rod 305, clamp 306, feeding pipe 4, radiation tube 5, feeding channel 6, spherical groove 7, connecting piece 8, fan blade 9, shell 10, feeding pipe 11, exhaust pipe 12, discharging pipe 13, grinding disc 14, grinding ball 15, hollow rotating shaft 16, cylindrical cam 17, first bevel gear 18, second bevel gear 19, second motor 20. DETAILED DESCRIPTION

[0037] The following is further described in detail through specific implementation methods:

[0038] The embodiment is basically as shown in the attached Figure 1-Figure 4 As shown:

[0039] The clamping device includes a support plate 1, to which a cylinder 2 is welded, a movable plate 3 is welded at the output end of the cylinder 2, a cross slide groove 301 is opened on the movable plate 3, a support frame 302 is installed on the movable plate 3, a first motor 303 is fixedly connected to the support frame 302 on the side close to the movable plate 3, a first connecting rod 304 is welded to the output end of the first motor 303, the first connecting rod 304 is perpendicular to the output end of the first motor 303, a second connecting rod 305 is hinged at one end of the first connecting rod 304 away from the first motor 303, and the first connecting rod 304 is hinged to the second connecting rod 305 at one-third of the distance from the first motor 303, a clamping claw 306 is hinged at the end of the second connecting rod 305, a slider is fixedly connected to the second connecting rod 305 at two-thirds of the distance from the first motor 303, and the slider slides in cooperation with the cross slide groove 301.

[0040] The spraying device includes a feed tube 4 and a radiation tube 5. The feed tube 4 and the radiation tube 5 are coaxially provided with a feed channel 6. The inner diameter of the feed channel 6 increases from top to bottom. The feed channel 6 is rotatably connected with a fan blade 9. The outer wall of the feed tube 4 is symmetrically provided with a first groove, and the inner wall of the radiation tube 5 is symmetrically provided with a second groove. Both the first groove and the second groove are hemispherical. The first groove and the second groove are combined to form a spherical groove 7. The spherical groove 7 has a built-in limiting ball. The limiting ball conflicts with the spherical groove 7. One side of the limiting ball is hinged to the radiation tube 5 through a connecting piece 8. In this embodiment, the connecting piece 8 is a bolt.

[0041] The reactor comprises a shell 10, the upper part of the side wall of the shell 10 is connected with a feed pipe 11, the top and bottom of the shell 10 are respectively connected with an exhaust pipe 12 and a discharge pipe 13, the discharge pipe 13 can be connected with the feed pipe 11, the shell 10 is slidably matched with a grinding disc 14, the grinding disc 14 is funnel-shaped, and a plurality of grinding balls 15 are rotatably connected to the inner wall of the grinding disc 14, and a heating component is arranged in the grinding balls 15, in this embodiment, the heating component is a heating resistor, the bottom of the grinding disc 14 is connected with a hollow shaft 16, the hollow shaft 16 is located above the discharge port, the hollow shaft 16 is sequentially connected with a valve and a reciprocating drive component from top to bottom, and the reciprocating drive component is used to drive the grinding disc 14 to reciprocate and shake;

[0042] The reciprocating drive assembly includes a cylindrical cam 17 and a first bevel gear 18 which are sleeved on a hollow rotating shaft 16. The cylindrical cam 17 is fixedly connected to the inner wall of the housing 10 through a support rod. The first bevel gear 18 is meshed with a second bevel gear 19. The second bevel gear 19 is coaxially fixedly connected to a second motor 20. The second motor 20 is fixedly connected to the inner wall of the housing 10.

[0043] The specific implementation process of the method for preparing a highly active water electrolysis hydrogen production catalyst is as follows:

[0044] S1. Preparation of polyhedral silicon template by thermal decomposition method:

[0045] S11, cleaning the template and polishing it, dissolving the silicon precursor in an organic solvent to prepare a silicon precursor solution;

[0046] S12, connecting the clamping device and the spraying device; S13, spraying the silicon precursor film: injecting the silicon precursor solution into the spraying device, driving the cylinder to move the clamping claw in a translational manner, and spraying the silicon precursor solution on the template to form a silicon precursor film;

[0047] S14. Thermal decomposition of the silicon precursor film: placing the template covered with the silicon precursor film in a high temperature furnace and thermally decomposing it at 350-450° C. to obtain a silicon template.

[0048] S2. Etching holes in the polyhedral silicon template to obtain a porous silicon template: injecting an etching gas flow into the spraying device, and only when the cylinder 2 is started, the translation of the clamp 306 is realized. When the first motor 303 is started, the first motor 303 drives the first connecting rod 304 to rotate. Since the slider slides in the cross slide groove 301 to limit the first connecting rod 304, the first connecting rod 304 makes a curved motion around the movable plate 3. By changing the displacement of the cylinder 2 and the steering of the first motor 303, the curved movement of the polyhedral silicon template is realized. The etching gas flow etches a porous structure on the polyhedral silicon template through the spraying device to obtain a porous silicon template. Since a limiting ball is placed in the spherical groove 7 between the feeding tube 4 and the radiation tube 5, the impact of the liquid or airflow causes the radiation tube 5 to rotate slightly, so that the liquid or airflow passing through the feeding channel 6 is circular when sprayed, thereby increasing the scattering surface of the liquid or airflow and improving the processing efficiency.

[0049] S3. Preparation of MoO by Electrodeposition 3-x (OH) x :The clamping device is installed above the electrolytic cell, the clamping claws clamp the porous silicon template and move in a curve, and are intermittently connected to the cathode of the power supply. Ammonium molybdate is used as the electrolyte, and the current density is 0.1-400 mA per square centimeter of the deposition area. The power supply is turned on for electrodeposition for 0.5-60 minutes to deposit molybdenum on the porous structure of the porous silicon template to obtain MoO 3-x (OH) x ;

[0050] S4、MoO 3-x (OH) x The first gear 18 and the second gear 19 are rotated to transmit the power to the hollow shaft 16. Due to the limit of the cylindrical cam 17 on the hollow shaft 16, the hollow shaft 16 can also reciprocate vertically when rotating, thereby driving the grinding disc 14 to simultaneously realize vertical reciprocating sliding and rotation. The heating component in the grinding ball 15 is used to heat the sulfur powder and MoO 3-x (OH) x While heating, sulfur powder and MoO 3-x (OH) x Flip it so that the heat is evenly distributed, which can shorten the sulfurization reaction time and produce porous molybdenum disulfide faster.

[0051] S5, put the cobalt chloride solution and the porous molybdenum disulfide into the reactor in turn, and perform pyrolysis at 300-500°C. The rotation of the second motor 20 can drive the first bevel gear 18 and the second bevel gear 19 to rotate, thereby transmitting power to the hollow shaft 16. Due to the limit of the cylindrical cam 17 on the hollow shaft 16, the hollow shaft can also reciprocate vertically when rotating, thereby driving the grinding disc 14 to simultaneously realize vertical reciprocating sliding and rotation. While the heating component in the grinding ball 15 heats the porous molybdenum disulfide, the porous molybdenum disulfide is turned over, and then the template is removed by hydrogen fluoride etching to obtain MOS 2 / Co catalyst.

[0052] The devices in this solution cooperate with each other to achieve multiple uses of one machine, reduce equipment costs and improve equipment utilization.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method for preparing a highly active water electrolysis hydrogen production catalyst, characterized in that: S1. Preparation of polyhedral silicon template by thermal decomposition method: S11, cleaning the template and polishing it, dissolving the silicon precursor in an organic solvent to prepare a silicon precursor solution; S12. Connect the clamping device and the spraying device: the clamping device includes a support plate, the support plate is fixedly connected to a cylinder, the output end of the cylinder is fixedly connected to a movable plate, a cross slide groove is provided on the movable plate, a support frame is installed on the movable plate, a first motor is fixedly connected to the support frame on the side close to the movable plate, a first connecting rod is fixedly connected to the output end of the first motor, the first connecting rod is perpendicular to the output end of the first motor, a second connecting rod is hinged to the end of the first connecting rod away from the first motor, and the first connecting rod is hinged to the second connecting rod at one-third of the distance from the first motor, a clamping claw is hinged to the end of the second connecting rod, a slider is fixedly connected to the second connecting rod at two-thirds of the distance from the first motor, and the slider is slidably matched with the cross slide groove; S13, spraying a silicon precursor film: injecting a silicon precursor solution into a spraying device, driving a cylinder to move the clamping jaws in a translational manner, and spraying the silicon precursor solution on the template to form a silicon precursor film; S14, thermally decomposing the silicon precursor film: placing the template covered with the silicon precursor film in a high temperature furnace, and thermally decomposing it at 350-450° C. to obtain a silicon template; S2. Etching holes in the polyhedral silicon template to obtain a porous silicon template: injecting an etching gas flow into a spraying device to drive the cylinder and the first motor, changing the displacement of the cylinder and the direction of the first motor, so that the polyhedral silicon template moves in a curved manner, and the etching gas flow etches a porous structure on the polyhedral silicon template through the spraying device to obtain a porous silicon template; S3. Preparation of MoO by electrodeposition 3-x (OH) x :The clamping device is installed above the electrolytic cell, and the clamping claws hold the porous silicon template and move it in a curve, which is intermittently connected to the cathode of the power supply. Ammonium molybdate is used as the electrolyte to electrodeposit molybdenum on the porous structure of the porous silicon template to obtain MoO 3-x (OH) x ; S4、MoO 3-x (OH) x Porous molybdenum disulfide is obtained by sulfidation; S5. Porous molybdenum disulfide is doped with Co to obtain MOS2 / Co catalyst.

2. The method for preparing a highly active water electrolysis hydrogen production catalyst according to claim 1, characterized in that: The spraying device in S12 includes a feed tube and a radiation tube, the feed tube and the radiation tube have a feed channel coaxially, the outer wall of the feed tube is symmetrically provided with a first groove, the inner wall of the radiation tube is symmetrically provided with a second groove, the first groove and the second groove are both hemispherical, the first groove and the second groove are combined to form a spherical groove, the spherical groove has a limiting ball built in, the limiting ball is in conflict with the spherical groove, and one side of the limiting ball is hinged to the radiation tube through a connecting piece.

3. The method for preparing a highly active water electrolysis hydrogen production catalyst according to claim 1, characterized in that: The inner diameter of the feeding channel in S12 increases from top to bottom.

4. The method for preparing a highly active water electrolysis hydrogen production catalyst according to claim 1, characterized in that: The feeding channel in S12 is rotatably connected with fan blades.

5. The method for preparing a highly active water electrolysis hydrogen production catalyst according to claim 1, characterized in that: The working parameters of the electrodeposition in S3 are: the electrodeposition is carried out for 0.5-60 minutes with a current density of 0.1-400 mA per square centimeter of the deposition area and the power is turned on.

6. The method for preparing a highly active water electrolysis hydrogen production catalyst according to claim 1, characterized in that: The S4MoO 3-x (OH) x The molybdenum disulfide is prepared by sequentially placing the molybdenum disulfide and the sulfur powder into a reactor and performing a sulfurization reaction at 400-800°C to obtain porous molybdenum disulfide.

7. The method for preparing a highly active water electrolysis hydrogen production catalyst according to claim 6, characterized in that: The reactor comprises a shell, the upper part of the side wall of the shell is connected with a feed pipe, the top and bottom of the shell are respectively connected with an exhaust pipe and a discharge pipe, the discharge pipe can be connected with the feed pipe, the shell is slidably matched with a grinding disc, the grinding disc is funnel-shaped, a plurality of grinding balls are rotatably connected to the inner wall of the grinding disc, a heating component is arranged in the grinding balls, a hollow rotating shaft is connected to the bottom of the grinding disc, the hollow rotating shaft is located above the discharge port, the hollow rotating shaft is sequentially connected with a valve and a reciprocating drive component from top to bottom, and the reciprocating drive component is used to drive the grinding disc to reciprocate and shake; The reciprocating drive assembly includes a cylindrical cam and a first bevel gear mounted on a hollow rotating shaft. The cylindrical cam is fixedly connected to the inner wall of the shell through a support rod. The first bevel gear is meshed with a second bevel gear. The second bevel gear is coaxially fixedly connected to a second motor. The second motor is fixedly connected to the inner wall of the shell.

8. The method for preparing a highly active water electrolysis hydrogen production catalyst according to claim 1, characterized in that: In the S5, a cobalt chloride solution and porous molybdenum disulfide are sequentially placed in a reactor, and pyrolyzed at 300-500° C. to obtain a MOS2 / Co catalyst.

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