Device for directly electrolyzing seawater to produce hydrogen by taking waste mask as filter material

Abstract

The invention discloses a device for directly electrolyzing seawater to produce hydrogen by taking a waste mask as a filter material, and relates to a device for electrolyzing seawater to produce hydrogen. The invention aims to solve the technical problems of low energy efficiency and corrosion of harmful chlorine chemical substances in seawater to an anode in the conventional method for producing hydrogen by directly electrolyzing seawater. According to the invention, a hydrophobic and breathable polypropylene non-woven fabric in a waste mask is used as a filter layer for the first time, PVA / NaOH gel electrolyte with excellent hygroscopicity in an all-solid-state lithium ion battery and a commercially available commercial Pt / C catalyst are fixed on a foamed nickel electrode to be used as a working electrode, namely a cathode, so that direct electrolysis of seawater is realized. When the device is used for directly electrolyzing seawater to produce hydrogen, the overpotential of a commercially available Pt / C catalyst is not influenced by seawater and is 40mV; under the condition that the current density is 250mA / cm < 2 >, the device can stably operate for more than 72 hours, hydrogen can be stably produced under the condition of not additionally consuming energy, and the energy consumption is similar to that of electrolyzed purified water.

Description

Technical Field

[0001] The present invention relates to an electrolytic seawater hydrogen production device. Background Art

[0002] Renewable energy sources such as wind energy, tidal energy, and solar energy are difficult to be connected to the grid due to their intermittency and regional limitations. By using the remaining renewable electric energy to electrolyze seawater to produce hydrogen, not only can the energy consumption cost of electrolytic water hydrogen production be reduced, but also the load impact on the power grid can be alleviated during peak power generation. However, the direct electrolytic seawater hydrogen production technology currently faces some challenges, including low energy efficiency and corrosion of the anode by harmful chlorine chemical substances in seawater. Although certain progress has been made in suppressing corrosion or generating highly selective electrocatalysts by methods such as using polyanion coatings, there are still some limitations in practical applications. Another solution is to adopt a seawater desalination process to avoid side reactions and corrosion problems. However, this method requires additional energy input and is not attractive from an economic perspective. Therefore, solving the problems of low energy efficiency and corrosion and improving the efficiency and economy of direct electrolytic seawater hydrogen production are still important research topics at present.

[0003] In November 2022, the latest research results first published by the team of Academician Xie Heping in the journal Nature showed that by using a hydrophobic and breathable membrane as the gas channel for water vapor and a poly(2-acrylamido-2-methylpropanesulfonic acid) self-hygroscopic electrolyte with the ability to induce the phase change of water vapor, a "liquid-gas-liquid" phase change migration module was constructed, effectively preventing the penetration of seawater and the impurity ions contained therein. Summary of the Invention

[0004] The present invention aims to solve the technical problems of low energy efficiency in the existing direct electrolytic seawater hydrogen production method and corrosion of the anode by harmful chlorine chemical substances in seawater, and provides a direct electrolytic seawater hydrogen production device using waste masks as filter materials.

[0005] The direct electrolytic seawater hydrogen production device using waste masks as filter materials of the present invention is composed of two support plates 1, two polypropylene non-woven fabrics 2 in waste masks, two electrolyte storage plates 3, a cathode plate 4, a diaphragm 5, an anode plate 6, and four bolts; with the diaphragm 5 as the center, the cathode plate 4 and the anode plate 6 are respectively on both sides of the diaphragm 5, and outside the cathode plate 4 are successively the electrolyte storage plate 3, the polypropylene non-woven fabric 2 in the waste mask, and the support plate 1; outside the anode plate 6 are successively the electrolyte storage plate 3, the polypropylene non-woven fabric 2 in the waste mask, and the support plate 1;

[0006] Two water inlets 1-2 are arranged near the lower end on the outer surface of the support plate 1, and the two water inlets 1-2 are arranged vertically; one first bolt hole 1-1 is arranged at each of the four corners of the support plate 1;

[0007] The polypropylene non-woven fabric 2 in the waste mask is obtained by disinfecting the recycled waste medical disposable mask and then disassembling it to obtain the outer non-woven fabric layer;

[0008] An electrolyte storage cavity 3-3 is arranged at the lower end of the outer surface of the electrolyte storage plate 3, and the electrolyte storage cavity 3-3 is a through-hole structure; a second bolt hole 3-1 is arranged at each of the four corners of the electrolyte storage plate 3; an exhaust port 3-4 is arranged at the center of the upper surface of the electrolyte storage plate 3, and a vertical exhaust pipe 3-2 is arranged directly below the exhaust port 3-4. The exhaust pipe 3-2 is arranged inside the electrolyte storage plate 3. The upper part of the exhaust pipe 3-2 is communicated with the exhaust port 3-4, and the lower part of the exhaust pipe 3-2 is communicated with the electrolyte storage cavity 3-3; the gel PVA / NaOH electrolyte is stored in the electrolyte storage cavity 3-3;

[0009] The cathode plate 4 is made by coating Pt / C catalyst on both sides of a nickel foam plate;

[0010] The diaphragm 5 is a proton exchange membrane;

[0011] The anode plate 6 is a nickel foam plate;

[0012] The four bolts pass through the first bolt holes 1-1 on the two support plates 1 and the second bolt holes 3-1 on the two electrolyte storage plates 3 to combine all the components into one body. Waterproof rubber gaskets are arranged around the area between the support plate 1 and the electrolyte storage plate 3; the two water inlets 1-2 are communicated with the electrolyte storage cavity 3-3 in the horizontal direction.

[0013] Put the direct seawater electrolysis hydrogen production device with waste mask as filter material of the present invention into seawater, then lead out the cathode plate 4 and the anode plate 5 by leads, connect an external power supply and start it to start electrolyzing seawater to produce hydrogen. Seawater enters through the water inlets 1-2 on the two outer support plates 1, then passes through the polypropylene non-woven fabric 2 in the waste mask to reach the PVA / NaOH gel electrolyte, and hydrogen is collected at the exhaust port 3-4 on the electrolyte storage plate 3 near the cathode, and oxygen is collected at the exhaust port 3-4 on the electrolyte storage plate 3 near the anode.

[0014] The present invention for the first time uses the hydrophobic and breathable polypropylene (PP) non-woven fabric (usually blue) in waste masks as a filter layer, which is sandwiched between the support plate 1 and the electrolyte storage plate 3, combines with the PVA / NaOH gel electrolyte with excellent hygroscopicity in all-solid-state lithium-ion batteries, and the commercially available commercial Pt / C catalyst is fixed on the nickel foam electrode as the working electrode, i.e., the cathode, so as to realize the direct electrolysis of seawater. The superhydrophobic PP filter layer in the device is used to separate liquid seawater from gaseous water, and the phase separation effect can be adjusted by changing the number of layers of the filled hydrophobic PP non-woven fabric filling layer; the gaseous water vapor diffuses through the diffusion path of the device to the next self-hygroscopic PVA / NaOH gel electrolyte layer, and the gaseous water can be re-liquefied into pure water through the micron-level water vapor migration channels in the hygroscopic gel electrolyte and participate in the electrochemical water splitting reaction. During the electrolysis process, the electrode consumes the pure water in the gel electrolyte to form a concentration gradient, prompting the spontaneous migration of water molecules; as the liquid water in the gel electrolyte is consumed, an interfacial pressure difference is generated, driving the external seawater to automatically enter the electrolytic cell. The experimental results show that when using this device for direct electrolysis of seawater to produce hydrogen, the overpotential of the commercially available Pt / C catalyst is not affected by seawater and is 40 mV. While in the control group of direct electrolysis of seawater without treatment, the overpotential is 48 mV. Under the condition of a current density of 250 mA / cm 2 , this device can stably operate for more than 72 h, can stably produce hydrogen without additional energy consumption, and the energy consumption is similar to that of electrolyzing pure water. The device of the present invention provides an efficient and stable solution for direct electrolysis of seawater, and solves the problems of electrode side reactions and seawater component corrosion.

[0015] The presence of the proton exchange membrane enables protons to be transported from the anode to the cathode, thus promoting the occurrence of the water electrolysis reaction. The gel-like hygroscopic electrolyte PVA / NaOH provides channels for water vapor migration to realize the electrolysis process. This device uses the commercially available commercial Pt / C catalyst, and the nickel foam electrode plate as the cathode provides good electrical conductivity and support. Finally, the water molecules in seawater undergo a reduction reaction on the cathode to produce hydrogen, which is discharged from the exhaust port 3-4 and can be collected.

[0016] The advantages of the present invention are as follows:

[0017] 1. The present invention for the first time uses the superhydrophobic PP non-woven fabric in waste medical masks as a filling layer and applies it to the direct electrolysis of seawater. The hydrophobic layer of the PP non-woven fabric isolates seawater. Driven by the interfacial pressure difference between the electrolyte and the aqueous solution, phase separation of seawater occurs at the interface of the filling layer, and pure seawater participates in the electrolytic water reaction through the self-hygroscopic gel electrolyte with excellent hydrophilicity; this simple device creates a pure electrolytic water environment, effectively eliminates various potential side reactions, and protects the electrolytic cell system;

[0018] 2. After the moisture-absorbing gel electrolyte PVA / NaOH used in the present invention absorbs water vapor, it liquefies again in the long micron-scale water vapor migration channels. Together with NaOH, it provides ionic conductivity for the electrolysis of water reaction and also provides a reliable water source for the efficient production of H2. Among them, PVA is a gel polymer matrix material with low price, safety, stable structure and good hydrophilicity.

[0019] 3. The combination of the hydrophobic layer filled in the waste mask and the self-moisture-absorbing PVA / NaOH gel electrolyte provides an interface channel for continuous mass transfer, enabling liquid seawater to be converted into gaseous pure water and then liquefied again to form pure liquid pure water. During the electrolysis process, the electrodes consume the pure water in the gel electrolyte, forming a concentration gradient, which promotes the spontaneous migration of water molecules. At the same time, this design provides a pure environment for the electrolysis process, eliminates various potential side reactions, and protects the electrolyzer system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Explosion diagram of a direct seawater electrolysis hydrogen production device using a waste mask as a filter medium for Embodiment 1;

[0021] Figure 2 Front view of the electrolyte storage plate 3 for Embodiment 1;

[0022] Figure 3 Static contact angle test diagram of the inner non-woven fabric of a waste medical disposable mask in Test 1;

[0023] Figure 4 Static contact angle test diagram of the outer non-woven fabric of a waste medical disposable mask in Test 1;

[0024] Figure 5 Tensile test diagram of the polypropylene (PP) non-woven fabrics of the inner and outer layers of a waste medical disposable mask in Test 1;

[0025] Figure 6 Physical diagram of the device during the process of electrolyzing seawater to produce hydrogen in Test 1;

[0026] Figure 7 For Test 1 at a constant current density of 250 mA / cm 2 Durability test data diagram of seawater electrolysis hydrogen production;

[0027] Figure 8 LSV diagram of seawater electrolysis hydrogen production in Test 1;

[0028] Figure 9 Physical photo of the seawater collected after 72 hours of durability test of seawater electrolysis hydrogen production in Test 1;

[0029] Figure 10The physical picture of the cathode collected after 72h of durability test for hydrogen production by electrolyzing seawater in Experiment 1;

[0030] Figure 11 SEM image of the commercial platinum-carbon catalyst in Experiment 1;

[0031] Figure 12 SEM image of the commercial platinum-carbon catalyst after 72h of durability test for hydrogen production by electrolyzing seawater in Experiment 1;

[0032] Figure 13 LSV graph of hydrogen production by electrolyzing seawater in Control Experiment 1;

[0033] Figure 14 Physical picture of the seawater collected after the durability test for hydrogen production by electrolyzing seawater in Control Experiment 1;

[0034] Figure 15 Physical picture of the cathode collected after the durability test for hydrogen production by electrolyzing seawater in Control Experiment 1;

[0035] Figure 16 SEM image of the commercial platinum-carbon catalyst after 72h of durability test for hydrogen production by electrolyzing seawater in Control Experiment 1;

[0036] Figure 17 LSV graph of hydrogen production by electrolyzing seawater in Control Experiment 2;

[0037] Figure 18 Physical picture of the seawater collected after the durability test for hydrogen production by electrolyzing seawater in Control Experiment 2;

[0038] Figure 19 Physical picture of the cathode collected after the durability test for hydrogen production by electrolyzing seawater in Control Experiment 2

[0039] Figure 20 SEM image of the commercial platinum-carbon catalyst after 72h of durability test for hydrogen production by electrolyzing seawater in Control Experiment 2. Detailed implementation method

[0040] Detailed implementation method 1: This implementation method is a direct electrolysis seawater hydrogen production device using waste masks as filter materials, as shown in Figure 1 and Figure 2As shown in the figure, it is specifically composed of two support plates 1, two polypropylene non-woven fabrics 2 from discarded masks, two electrolyte storage plates 3, one cathode plate 4, one diaphragm 5, one anode plate 6, and four bolts; with the diaphragm 5 as the center, the cathode plate 4 and the anode plate 6 are respectively on both sides of the diaphragm 5. On the outer side of the cathode plate 4, there are successively the electrolyte storage plate 3, the polypropylene non-woven fabric 2 from the discarded mask, and the support plate 1; on the outer side of the anode plate 6, there are successively the electrolyte storage plate 3, the polypropylene non-woven fabric 2 from the discarded mask, and the support plate 1.

[0041] On the outer surface of the support plate 1, two water inlets 1-2 are arranged near the lower end, and the two water inlets 1-2 are arranged vertically; one first bolt hole 1-1 is arranged at each of the four corners of the support plate 1.

[0042] The polypropylene non-woven fabric 2 from the discarded mask is obtained by disinfecting the recycled discarded medical disposable mask and then disassembling it to take the outer non-woven fabric layer.

[0043] On the outer surface of the electrolyte storage plate 3 near the lower end, there is an electrolyte storage cavity 3-3, and the electrolyte storage cavity 3-3 is a through-hole structure; one second bolt hole 3-1 is arranged at each of the four corners of the electrolyte storage plate 3; at the center of the upper surface of the electrolyte storage plate 3, there is an exhaust port 3-4, and directly below the exhaust port 3-4, there is a vertical exhaust pipe 3-2. The exhaust pipe 3-2 is arranged inside the electrolyte storage plate 3. The upper part of the exhaust pipe 3-2 is communicated with the exhaust port 3-4, and the lower part of the exhaust pipe 3-2 is communicated with the electrolyte storage cavity 3-3; the gel PVA / NaOH electrolyte is stored in the electrolyte storage cavity 3-3.

[0044] The cathode plate 4 is made by coating both sides of a nickel foam plate with Pt / C catalyst.

[0045] The diaphragm 5 is a proton exchange membrane.

[0046] The anode plate 6 is a nickel foam plate.

[0047] The four bolts pass through the first bolt holes 1-1 on the two support plates 1 and the second bolt holes 3-1 on the two electrolyte storage plates 3 to combine all the components into one body; the two water inlets 1-2 are communicated with the electrolyte storage cavity 3-3 in the horizontal direction.

[0048] Specific Embodiment 2: The difference between this embodiment and Specific Embodiment 1 is that the way of disinfecting the recycled discarded medical disposable mask is by disinfecting with alcohol or ultraviolet light. Others are the same as Specific Embodiment 1.

[0049] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the preparation method of the gel PVA / NaOH electrolyte is as follows: dissolve PVA in a 40wt% NaOH aqueous solution at 70°C to form a 30wt% PVA solution, and stir it vigorously to dissolve it completely. Then pour the PVA aqueous solution into a container, cool the container to -20°C and keep it warm for 12h to form a gel state, and then soak it in a 40wt% NaOH aqueous solution for 24h to obtain the gel PVA / NaOH electrolyte. Others are the same as Embodiment 1 or 2.

[0050] Embodiment 4: The difference between this embodiment and any one of Embodiments 1 to 3 is that the material of the support plate 1 is polypropylene, polyethylene, polyurethane or polycarbonate. Others are the same as any one of Embodiments 1 to 3.

[0051] Embodiment 5: The difference between this embodiment and Embodiment 4 is that the material of the bolt is polytetrafluoroethylene. Others are the same as Embodiment 4.

[0052] Embodiment 6: The difference between this embodiment and Embodiment 5 is that the proton exchange membrane is a perfluorosulfonic acid ion membrane. Others are the same as Embodiment 5.

[0053] The present invention is verified by the following tests:

[0054] Test 1: This test is a direct electrolysis seawater hydrogen production device using waste masks as filter materials. As shown in Figure 1 and Figure 2 it is specifically composed of two support plates 1, two polypropylene non-woven fabrics 2 in waste masks, two electrolyte storage plates 3, a cathode plate 4, a diaphragm 5, an anode plate 6 and four bolts; with the diaphragm 5 as the center, the cathode plate 4 and the anode plate 6 are respectively on both sides of the diaphragm 5. The cathode plate 4 is successively the electrolyte storage plate 3, the polypropylene non-woven fabric 2 in the waste mask and the support plate 1 towards the outside; the anode plate 6 is successively the electrolyte storage plate 3, the polypropylene non-woven fabric 2 in the waste mask and the support plate 1 towards the outside; the material of the support plate 1 is polypropylene;

[0055] Two water inlets 1-2 are arranged near the lower end on the outer surface of the support plate 1, and the two water inlets 1-2 are arranged vertically; one first bolt hole 1-1 is arranged at each of the four corners of the support plate 1;

[0056] The polypropylene non-woven fabric 2 in the waste mask is obtained by disinfecting the recycled waste medical disposable mask and then disassembling and taking the outer non-woven fabric layer;

[0057] On the outer surface of the electrolyte storage plate 3 near the lower end, an electrolyte storage cavity 3-3 is provided, and the electrolyte storage cavity 3-3 is a through-hole structure; a second bolt hole 3-1 is provided at each of the four corners of the electrolyte storage plate 3; at the center of the upper surface of the electrolyte storage plate 3, an exhaust port 3-4 is provided, and directly below the exhaust port 3-4, a vertical exhaust pipe 3-2 is provided. The exhaust pipe 3-2 is arranged inside the electrolyte storage plate 3. The upper part of the exhaust pipe 3-2 is communicated with the exhaust port 3-4, and the lower part of the exhaust pipe 3-2 is communicated with the electrolyte storage cavity 3-3; a gel PVA / NaOH electrolyte is stored in the electrolyte storage cavity 3-3;

[0058] The cathode plate 4 is made by coating commercial Pt / C catalyst on both sides of a nickel foam plate;

[0059] The separator 5 is a proton exchange membrane;

[0060] The anode plate 6 is a nickel foam plate;

[0061] The four bolts pass through the first bolt holes 1-1 on the two support plates 1 and the second bolt holes 3-1 on the two electrolyte storage plates 3 to combine all the components into one body; the two water inlets 1-2 are communicated with the electrolyte storage cavity 3-3 in the horizontal direction.

[0062] The disinfection method for the recycled waste medical disposable masks is disinfection with alcohol;

[0063] The preparation method of the gel PVA / NaOH electrolyte is as follows: dissolve PVA in a 40wt% NaOH aqueous solution at 70°C to form a 30wt% PVA solution, and fully dissolve it by vigorous stirring. Then pour the PVA aqueous solution into a container, cool the container to -20°C and keep it warm for 12h to form a gel state, and then soak it in a 40wt% NaOH aqueous solution for 24h to obtain the gel PVA / NaOH electrolyte;

[0064] The material of the bolt is polytetrafluoroethylene;

[0065] The proton exchange membrane is a perfluorosulfonic acid ion membrane.

[0066] Remove the inner and outer polypropylene (PP) non-woven fabrics of the recycled waste medical disposable masks and conduct static contact angle tests respectively, Figure 3 For the inner non-woven fabric, Figure 4 For the outer non-woven fabric, it can be seen that the contact angle of the inner polypropylene non-woven fabric layer is 110°, while the contact angle of the outer layer exceeds 141°. Tensile experiments are conducted on the inner and outer polypropylene (PP) non-woven fabrics respectively, and the results are as Figure 5, it can be seen that the tensile strength of the outer polypropylene non-woven fabric layer is 6.9 MPa, slightly higher than that of the inner layer. Therefore, the present invention selects the blue outer non-woven fabric layer with better mechanical properties and hydrophobicity as the filling material.

[0067] Device operation: Place the above-mentioned direct electrolysis seawater hydrogen production device using waste masks as filter materials in a beaker filled with seawater, and then lead out the cathode plate 4 and the anode plate 5 by leads, connect to an external power supply and start to electrolyze seawater to produce hydrogen. The physical diagram is shown in Figure 6 ; Under the condition of 250 mA / cm 2 , it can be stably operated in seawater for 72 h, and the actual voltage is about 1.9 V, as shown in Figure 7 ; The hydrogen evolution overpotential is 40 mV, as shown in Figure 8 ; After 72 h of continuous catalytic reaction, the seawater used in the experiment is clear (as shown in Figure 9 ); There is no obvious corrosion on the cathode surface, as shown in Figure 10 ; The SEM image of the cathode commercial Pt / C catalyst after 72 h of continuous catalytic reaction is shown in Figure 12 , and it is almost the same as the commercial Pt / C catalyst before the test ( Figure 11 ).

[0068] Control experiment 1: A control experiment of directly electrolyzing seawater with only a commercial Pt / C electrode, without waste masks and the electrolyte part. Specific operation: Use nickel foam as the anode catalyst, nickel foam coated with commercial platinum carbon powder as the cathode catalyst, and perfluorosulfonic acid ion exchange membrane as the diaphragm. Under the condition of 250 mA / cm 2 , the hydrogen evolution overpotential is 45 mV, as shown in Figure 13 ; After 72 h of continuous catalytic reaction, the seawater used in the experiment becomes very turbid, as shown in Figure 14 ; The surfaces of both electrodes are significantly corroded, and there are green rust marks in the nickel foam, as shown in Figure 15 ; In the cathode that has experienced 72 h of continuous catalytic reaction, a large amount of inorganic salt deposition can be clearly observed in the SEM of the collected Pt / C catalyst, as shown in Figure 16 .

[0069] Control experiment 2: Investigate the role of the hydrophobic mask non-woven fabric filling layer in the device involved in the present invention. The difference between the device and experiment 1 is that the polypropylene non-woven fabric in the waste mask is not added, and the rest is the same as experiment 1. Under the condition of 250 mA / cm 2 , the hydrogen evolution overpotential is 45 mV, as shown in Figure 17 ; After 72 h of continuous catalytic reaction, the seawater used in the experiment is turbid, as shown in Figure 18 ; There are green rust marks in the nickel foam of the cathode, as shown in Figure 19, but it is better than that of Comparative Experiment 1. In the cathode undergoing 72 h of continuous catalytic reaction, a small amount of inorganic salt deposition can be seen in the SEM of the Pt / C catalyst collected, as Figure 20 shown.

Claims

1. A direct electrolysis seawater hydrogen production device using waste masks as filter materials, characterized in that The device for directly electrolyzing seawater to produce hydrogen with waste masks as filter materials consists of two support plates (1), two polypropylene non-woven fabrics (2) in waste masks, two electrolyte storage plates (3), a cathode plate (4), a diaphragm (5), an anode plate (6) and four bolts; with the diaphragm (5) as the center, the cathode plate (4) and the anode plate (6) are respectively on both sides of the diaphragm (5), and the electrolyte storage plate (3), the polypropylene non-woven fabric (2) in the waste mask and the support plate (1) are successively arranged on the outside of the cathode plate (4) in turn; the electrolyte storage plate (3), the polypropylene non-woven fabric (2) in the waste mask and the support plate (1) are successively arranged on the outside of the anode plate (6) in turn; Two water inlets (1-2) are arranged near the lower end on the outer surface of the support plate (1), and the two water inlets (1-2) are arranged vertically; four first bolt holes (1-1) are respectively arranged at the four corners of the support plate (1); The polypropylene non-woven fabric (2) in the waste mask is obtained by disinfecting the recycled waste medical disposable mask and then disassembling to take the outer non-woven fabric layer; An electrolyte storage cavity (3-3) is arranged near the lower end on the outer surface of the electrolyte storage plate (3), and the electrolyte storage cavity (3-3) is a through-hole structure; four second bolt holes (3-1) are respectively arranged at the four corners of the electrolyte storage plate (3); an exhaust port (3-4) is arranged at the center of the upper surface of the electrolyte storage plate (3), and a vertical exhaust pipe (3-2) is arranged directly below the exhaust port (3-4). The exhaust pipe (3-2) is arranged inside the electrolyte storage plate (3), the upper part of the exhaust pipe (3-2) is communicated with the exhaust port (3-4), and the lower part of the exhaust pipe (3-2) is communicated with the electrolyte storage cavity (3-3); the gel PVA / NaOH electrolyte is stored in the electrolyte storage cavity (3-3); The cathode plate (4) is made by coating Pt / C catalyst on both sides of a nickel foam plate; The diaphragm (5) is a proton exchange membrane; The anode plate (6) is a nickel foam plate; The four bolts pass through the first bolt holes (1-1) on the two support plates (1) and the second bolt holes (3-1) on the two electrolyte storage plates (3) to combine all components into one body; the two water inlets (1-2) are communicated with the electrolyte storage cavity (3-3) in the horizontal direction.

2. The direct electrolysis seawater hydrogen production device using waste masks as filter materials according to claim 1, characterized in that The method of disinfecting the recycled waste medical disposable mask is disinfection with alcohol or ultraviolet light.

3. The direct electrolysis seawater hydrogen production device using waste masks as filter materials according to claim 1, characterized in that The preparation method of the gel PVA / NaOH electrolyte is as follows: dissolve PVA in a 40wt% NaOH aqueous solution at 70°C to form a 30wt% PVA solution, and make it fully dissolve by vigorous stirring. Then pour the PVA aqueous solution into a container, cool the container to -20°C and keep it warm for 12h to form a gel state, and then soak it in a 40wt% NaOH aqueous solution for 24h to obtain the gel PVA / NaOH electrolyte.

4. The direct electrolysis seawater hydrogen production device using waste masks as filter materials according to claim 1, wherein The material of the support plate (1) is polypropylene, polyethylene, polyurethane or polycarbonate.

5. The direct electrolysis seawater hydrogen production device using waste masks as filter materials according to claim 1, characterized in that The material of the bolt is polytetrafluoroethylene.

6. The direct electrolysis seawater hydrogen production device using waste masks as filter materials according to claim 1, characterized in that The proton exchange membrane described above is a perfluorosulfonic acid ion membrane.

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