Method, device and system for in-situ direct electrolysis of seawater without desalination to produce hydrogen

Abstract

The present invention discloses a method, device and system for in-situ direct electrolysis of seawater to produce hydrogen without desalination. By directly immersing the device for in-situ direct electrolysis of seawater to produce hydrogen without desalination into seawater, driven by the interfacial pressure difference between seawater and the self-driven electrolyte, seawater continuously enters the device for in-situ direct electrolysis of seawater to produce hydrogen without desalination through the solution mass transfer layer. Induced by the self-driven electrolyte in the device, it enters the electrolyte solution. At the same time, the hydrophobic effect of the solution mass transfer layer effectively blocks non-aqueous impurities in the solution. During electrolysis, the water in the self-driven electrolyte is consumed to produce hydrogen and oxygen, and induces the regeneration of the electrolyte to maintain the interfacial pressure difference, realizing self-circulation excitation drive without additional energy consumption. When the amount of aqueous solution induced by the self-driven electrolyte is equal to the amount of water consumed by electrolytic hydrogen production, a dynamic and stable method and system for in-situ direct electrolysis of seawater to produce hydrogen without desalination and without additional energy consumption are formed.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrochemistry, and in particular, relates to a method, device and system for producing hydrogen by in-situ direct electrolysis of seawater without desalination. Background Art

[0002] Hydrogen energy has the advantages of wide sources, storability, multiple uses, zero carbon and zero pollution, and high energy density. It is a key component of the future energy field. At present, there are two ways to obtain hydrogen energy by electrolyzing water. One is to directly use non-pure aqueous solutions such as seawater, river water or lake water in nature. Taking seawater electrolysis to produce hydrogen as an example, it has the following problems: ① The composition of seawater is complex, and the composition will change with factors such as season, climate, temperature, region and human activities. Therefore, seawater direct hydrogen electrolysis devices in different regions are not directly compatible; ② Cl in seawater - The highest content, in the electrolysis reaction, Cl - Can be oxidized in the oxygen evolution reaction to produce ClO which is toxic, environmentally harmful and corrosive - and Cl2; ③ When hydrogen is produced directly from seawater, H + and OH - The ion concentration is too small or the buffer molecules cannot transport OH at the cathode and anode. - and H + , resulting in low electrolysis efficiency, so additional additives or ion exchange membranes are required, which greatly increases costs. At the same time, the exchange membrane is highly sensitive to impurities and may have deactivation or maintenance costs; ④ Due to local pH differences during electrolysis, precipitation with calcium and magnesium ions may occur, and acid precipitation treatment is required, which incurs additional costs. The second is to purify various non-pure aqueous solutions to produce pure water for use in electrolyzers. Still taking seawater as an example, it is necessary to go through the seawater desalination process. This method requires the establishment of a seawater desalination plant on the coast, which greatly increases costs in terms of construction, operation, manpower, and maintenance; and it is difficult to use offshore wind power coupling on a large scale to form an in-situ integrated marine green hydrogen production system, and it is difficult to achieve stable storage of renewable energy, a multi-energy complementary energy system, and the construction of offshore energy ecological floating islands. Summary of the invention

[0003] In view of this, in order to solve the technical problem that it is difficult to directly use non-pure water resources such as seawater, river water, and lake water in nature with complex components and wide distribution for electrolytic hydrogen production without secondary purification treatment, the present invention aims to provide a method, device, and system for seawater non-desalination in-situ direct electrolytic hydrogen production, so as to fundamentally solve the problems of electrolytic hydrogen production such as the failure of ion exchange membranes, the inactivation of catalysts, low conversion efficiency, the generation of alkaline precipitates and toxic gases caused by the complex ionic components in natural seawater; at the same time, it helps to make the future hydrogen energy conversion unrestricted by time and space, and realizes in-situ direct electrolytic hydrogen production from a series of non-pure water, including natural water resources such as seawater, river water, and lake water, and even domestic wastewater, industrial wastewater, and sludge.

[0004] The technical solution adopted by the present invention is as follows: a method for seawater non-desalination in-situ direct electrolytic hydrogen production, which includes:

[0005] The solution mass transfer layer blocks seawater (non-pure aqueous solution) and impurity ions, realizes the selective passage of water vapor, and the self-driven electrolyte obtains impurity-free water through the interfacial pressure difference or osmotic pressure difference-induced phase change of the aqueous solution.

[0006] The cathode side in the hydrogen production electrolysis performs a hydrogen evolution reaction on the water in the self-driven electrolyte to prepare hydrogen and OH - , and transfers OH - to the anode side in the hydrogen production electrolysis and prepares oxygen through the anode side by an oxygen evolution reaction.

[0007] Among them, during the hydrogen production electrolysis process, as the water in the self-driven electrolyte is continuously electrolyzed and consumed, the self-driven electrolyte is induced to regenerate, maintaining the interfacial pressure difference, and forming a self-circulating excitation drive for hydrogen production without additional energy consumption.

[0008] The present invention also provides a device for seawater non-desalination in-situ direct electrolytic hydrogen production, which includes:

[0009] A self-capture container that spontaneously obtains impurity-free water; under the action of the interfacial pressure difference or osmotic pressure difference between seawater (non-pure aqueous solution) and the self-driven electrolyte, the self-capture container induces and drives the water in the external solution to pass through the solution mass transfer layer and be induced to phase change by the self-driven electrolyte.

[0010] A catalytic electrolysis module disposed in the self-capture container divides the self-capture container into an anode electrolysis chamber and a cathode electrolysis chamber, and forms a self-driven electrolyte at least in the anode electrolysis chamber or the cathode electrolysis chamber. The self-driven electrolyte first electrolyzes in the cathode electrolysis chamber to prepare hydrogen and OH - , and OH - enters the anode chamber through the catalytic electrolysis module and electrolyzes to prepare oxygen.

[0011] Among them, the catalytic electrolysis module prepares oxygen and hydrogen through the chemical principle of catalytic electrolysis, coupling a variety of technologies to form a complete in-situ direct electrolysis hydrogen production process system without seawater desalination. Among them, the available self-driven electrolytes include but are not limited to: K2CO3, KOH, NaOH, Ca(OH)2, Na2CO3, etc.

[0012] Furthermore, the self-capture container includes:

[0013] A porous insulating mesh tank, with a cavity provided inside the porous insulating mesh tank, and the catalytic electrolysis module is placed inside this cavity;

[0014] A solution mass transfer layer coated outside the porous insulating mesh tank, which blocks impurities in seawater (non-pure aqueous solution) through this solution mass transfer layer;

[0015] The catalytic electrolysis module is embedded in the cavity of the porous insulating mesh tank and divides the cavity into an anode electrolysis chamber and a cathode electrolysis chamber. By the hydrophobic effect of the solution mass transfer layer, the impurity solution is blocked outside the system, and the impurity-free moisture in seawater (non-pure aqueous solution) is induced and captured by the self-driven electrolyte to form electrolyte solutions in the anode electrolysis chamber and the cathode electrolysis chamber.

[0016] Furthermore, the catalytic electrolysis module includes:

[0017] An ion transfer layer, which is used to transfer OH - ions between the anode electrolysis chamber and the cathode electrolysis chamber and block the mixing of O2 generated on the anode side and H2 generated on the cathode side; among them, the ion transfer layer includes but is not limited to polymer films such as polyester diaphragm, nylon diaphragm, ceramic porous diaphragm, anion exchange membrane or PVA, etc.

[0018] An anode catalytic electrode and a cathode catalytic electrode symmetrically arranged on both sides of the ion transfer layer. An anode plate and a cathode plate are respectively attached to the surfaces of the anode catalytic electrode and the cathode catalytic electrode, and the anode plate and the cathode plate respectively form the anode electrolysis chamber and the cathode electrolysis chamber with the self-capture container;

[0019] Among them, the ion transfer layer, the anode catalytic electrode, the cathode catalytic electrode, the anode plate and the cathode plate are all embedded in the inner cavity of the self-capture container;

[0020] Self-driven electrolytes are stored in both the cathode electrolysis chamber and the anode electrolysis chamber. After the device is immersed in a seawater (non-pure aqueous solution) system, under the action of the interfacial pressure difference, seawater (non-pure aqueous solution) vapor spontaneously mass-transfers through the solution mass transfer layer and is induced to undergo a phase change by the self-driven electrolyte to form liquid water, so that the catalytic electrolysis module is immersed in the self-driven electrolyte environment in the porous insulating mesh tank; after starting electrolysis, first, the cathode catalytic electrode undergoes a reduction reaction to produce hydrogen, and the generated OH -Under the action of the ion transfer layer, it is transferred to the anode and the oxygen evolution reaction occurs on the anode catalytic electrode; among them, the anode catalytic electrode includes but is not limited to: nickel molybdenum, iridium tantalum, ruthenium iridium, NiFe-LDH, titanium mesh, nickel foam, etc. loaded with NiFeCu alloy catalyst; available cathode catalytic electrodes include but are not limited to: platinum mesh, nickel-plated platinum mesh, Fe x Co y Ni z type catalyst loaded nickel foam and titanium felt, etc.

[0021] Furthermore, the self-capture container includes:

[0022] A solution mass transfer layer, a cavity is provided in the solution mass transfer layer, and the catalytic electrolysis module is arranged in the cavity;

[0023] An anode plate and a cathode plate respectively attached to both sides of the catalytic electrolysis module, an anode porous insulating mesh groove is closely attached between the anode plate and the cavity, and a cathode porous insulating mesh groove is closely attached between the cathode plate and the cavity;

[0024] Among them, the anode electrolysis chamber and the cathode electrolysis chamber are respectively formed on the anode plate and the cathode plate.

[0025] Furthermore, the catalytic electrolysis module includes:

[0026] An ion transfer layer, which is used to transfer OH - ions between the anode electrolysis chamber and the cathode electrolysis chamber; among them, the ion transfer layer includes but is not limited to polymer films such as polyester diaphragm, nylon diaphragm, ceramic porous diaphragm, anion exchange membrane or PVA.

[0027] An anode catalytic electrode and a cathode catalytic electrode symmetrically arranged on both sides of the ion transfer layer, an anode plate is closely attached to the anode catalytic electrode, and a cathode plate is closely attached to the cathode catalytic electrode.

[0028] In the present invention, a seawater non-desalination in-situ direct electrolysis hydrogen production device is also disclosed. The hydrogen production device includes:

[0029] A cavity and a self-driven electrolyte layer arranged in the cavity. The self-driven electrolyte layer divides the cavity into an anode electrolysis chamber and a cathode electrolysis chamber, and solution mass transfer layers for inducing and driving impurity-free water mass transfer are respectively provided in the anode electrolysis chamber and the cathode electrolysis chamber;

[0030] A catalytic electrolysis module arranged in the cavity. In the cathode electrolysis chamber, water in the self-driven electrolyte layer is electrolyzed by the catalytic electrolysis module to produce hydrogen and OH - , and OH - enters the anode electrolysis chamber through the self-driven electrolyte layer and oxygen is produced by electrolysis.

[0031] Further, the catalytic electrolysis module includes:

[0032] An anode catalytic electrode and a cathode catalytic electrode closely attached to both sides of the self-driven electrolyte layer, with an anode plate and a cathode plate respectively closely attached to the sides of the anode catalytic electrode and the cathode catalytic electrode;

[0033] Wherein, exhaust grooves are respectively formed on the anode plate and the cathode plate, and the solution mass transfer layers are respectively attached to the sides of the anode plate and the cathode plate.

[0034] Further, the solution mass transfer layer is any one of a TPU membrane, a PTFE membrane, and a PDMS membrane with a pore size of 0.1 - 100 um; the hydrophobic effect of the solution mass transfer layer blocks the impurity solution outside the system, while driving the mass transfer of the aqueous solution, and cooperating with the self-driven electrolyte to induce the phase change of the aqueous solution to form impurity-free liquid water.

[0035] Or the solution mass transfer layer is a porous solution mass transfer layer prepared by spraying, screen printing, or electrostatic adsorption of graphene, PVDF particles, and PTFE particles;

[0036] The hydrophobic effect of the solution mass transfer layer blocks the impurity solution outside the system, while driving the mass transfer of the aqueous solution into the electrolyte. Further, the seawater non-desalination in-situ direct electrolysis hydrogen production system further includes an energy supply module, which is electrically connected to the anode plate and the cathode plate respectively and supplies power to the anode plate and the cathode plate respectively;

[0037] The energy supply module can also directly utilize thermal power, hydropower, etc. Further still, it can also be coupled with renewable energy sources such as wind power, photovoltaic power, and nuclear energy to realize green hydrogen production, thereby realizing the energy conversion of unstable renewable energy. The formed hydrogen energy is conducive to stable storage.

[0038] In the present invention, a seawater non-desalination in-situ direct electrolysis hydrogen production system is also provided. The hydrogen production system includes at least one seawater non-desalination in-situ direct electrolysis hydrogen production device as described above, and the hydrogen production system further includes:

[0039] At least one oxygen collection unit and at least one hydrogen collection unit, and each of the oxygen collection unit and the hydrogen collection unit is communicated with the anode electrolysis chamber and the cathode electrolysis chamber respectively;

[0040] When the system is applied, it can be adaptively designed according to the hydrogen production demand.

[0041] Further, the oxygen collection unit includes: an oxygen scrubber communicated with the anode electrolysis chamber, the oxygen scrubber is connected with an oxygen dryer, and the oxygen dryer is connected with an oxygen collection bottle. The oxygen is stored in the oxygen collection bottle for further use;

[0042] The hydrogen collection unit comprises: a hydrogen scrubber communicated with the cathode electrolysis chamber, the hydrogen scrubber is connected to a hydrogen dryer, the hydrogen dryer is connected to a hydrogen collection bottle, and the hydrogen is stored in the hydrogen collection bottle for further use.

[0043] The beneficial effects of the present invention are:

[0044] 1. The method, device and system for producing hydrogen by in-situ direct electrolysis of seawater without desalination provided by the present invention are adopted. Through the interface pressure difference between the solution and the self-driving electrolyte, the self-driving electrolyte spontaneously induces the phase change of the aqueous solution to form impurity-free water, and produces hydrogen through in-situ catalytic electrolysis, consuming the water in the self-driving electrolyte in the system, and inducing the cyclic regeneration of the electrolyte, maintaining the interface pressure difference, realizing self-circulation excitation drive without additional energy consumption of the system, and realizing a continuous and stable hydrogen production process without desalination. At the same time, the total energy consumption of the system is equivalent to that of hydrogen production by electrolysis of fresh water.

[0045] 2. The method, device and system for producing hydrogen by direct in-situ electrolysis of seawater without desalination provided by the present invention use alkaline substances as self-driven electrolytes to spontaneously induce phase change of seawater (non-pure aqueous solution) in seawater (non-pure aqueous solution) to form an alkaline electrolyte and electrolyze the electrolyte to produce hydrogen and oxygen, which greatly improves the conductivity of the solution and avoids the H + and OH - The problem of low transmission efficiency at the anode and cathode is caused by low concentration.

[0046] 3. The method, device and system for producing hydrogen by in-situ direct electrolysis of seawater without desalination provided by the present invention, when used, the self-driven electrolyte-induced phase change is all impurity-free water, thus breaking through the bottleneck that the direct hydrogen production from seawater (non-pure aqueous solution) is restricted by factors such as time, climate, and human activities, breaking through the bottleneck of traditional seawater (non-pure aqueous solution) desalination electrolysis hydrogen production, without the need to build desalination plants on a large scale, greatly reducing the costs of construction, operation, manpower, maintenance, etc., and can also be used for electrolysis hydrogen production in any non-pure aqueous solution environment such as sludge, swamps, rivers, or directly in the atmosphere, greatly broadening the source range of hydrogen energy, and at the same time not being restricted by time and space.

[0047] 4. The method, device and system for producing hydrogen by direct electrolysis of seawater without desalination provided by the present invention can spontaneously capture water without impurities when used, thus breaking through the problem that chloride ions are oxidized to produce Cl2 or ClO in direct hydrogen production from seawater (non-pure aqueous solution). - This technology is a green, non-toxic and environmentally friendly process system that can eliminate bottlenecks such as corrosion and toxic substances. At the same time, the solution system does not contain impurity ions such as calcium ions and magnesium ions. There will be no calcium and magnesium precipitation during long-term operation, reducing the subsequent maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is the overall schematic diagram of the seawater non-desalination in-situ direct electrolysis hydrogen production device provided by the present invention in Example 1;

[0049] Figure 2 It is the overall schematic diagram of the seawater non-desalination in-situ direct electrolysis hydrogen production device provided by the present invention in Example 2;

[0050] Figure 3 It is the overall schematic diagram of the seawater non-desalination in-situ direct electrolysis hydrogen production device provided by the present invention in Example 3;

[0051] Figure 4 It is the LSV curve graph of the seawater non-desalination in-situ direct electrolysis hydrogen production device provided by the present invention in Example 1;

[0052] Figure 5 It is the stable operation effect diagram of the seawater non-desalination in-situ direct electrolysis hydrogen production device provided by the present invention in Example 1;

[0053] Figure 6 It is the stable operation effect diagram of the seawater non-desalination in-situ direct electrolysis hydrogen production device provided by the present invention in Example 3;

[0054] The markings in the attached drawings are as follows:

[0055] 1 - A energy supply module, 2 - A anode plate, 3 - A anode catalytic electrode, 4 - A ion transfer layer, 5 - A cathode catalytic electrode, 6 - A cathode plate, 7 - A anode electrolysis chamber, 8 - A cathode electrolysis chamber, 9 - porous insulating mesh tank, 10 - A solution mass transfer layer, 11 - A oxygen scrubber, 12 - A oxygen dryer, 13 - A oxygen collection bottle, 14 - A hydrogen scrubber, 15 - A hydrogen dryer, 16 - A hydrogen collection bottle, 17 - A catalytic electrolysis module;

[0056] 18-B Energy supply module, 19-anode porous insulating mesh groove, 20-B anode plate, 21-B anode electrolysis chamber, 22-B anode catalytic electrode, 23-B ion transfer layer, 24-B cathode catalytic electrode, 25-B cathode plate, 26-B cathode electrolysis chamber, 27-cathode porous insulating mesh groove, 28-B solution mass transfer layer, 29-B oxygen scrubber, 30-B oxygen dryer, 31-B oxygen collection bottle, 32-B hydrogen scrubber, 33-B hydrogen dryer, 34-B hydrogen collection bottle, 35-B catalytic electrolysis module, 36-C energy supply module, 37-anode solution mass transfer layer, 38-C anode plate, 39-C anode catalytic electrode, 40-C ion transfer layer, 41-C cathode catalytic electrode, 42-C cathode plate, 43-cathode solution mass transfer layer, 44-C oxygen scrubber, 45-C oxygen dryer, 46-C oxygen collection bottle, 47-C hydrogen scrubber, 48-C hydrogen dryer, 49-C hydrogen collection bottle, 50-C catalytic electrolysis module. Detailed implementation mode

[0057] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0059] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0060] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0061] In the description of the embodiments of the present invention, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship in which the inventive product is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the terms "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0062] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances; the drawings in the embodiments are used to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Usually, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0063] Embodiment 1

[0064] In this embodiment, a seawater non-desalination in-situ direct electrolysis hydrogen production device is specifically provided. When the hydrogen production device is applied, it can be immersed in various non-pure aqueous solutions such as seawater, sludge, and swamps. Through the driving force of the non-pure water system and the self-driven electrolyte interface pressure difference, it promotes the self-driven electrolyte to spontaneously induce the phase change of seawater (non-pure aqueous solution), and produces hydrogen under the electrolysis reaction.

[0065] As Figure 1 shown, the hydrogen production device includes: a self-capture container and an A catalytic electrolysis module 17 provided in the self-capture container. The self-capture container spontaneously obtains impurity-free moisture, and then the A catalytic electrolysis module 17 divides the self-capture container into an A anode electrolysis chamber 7 and an A cathode electrolysis chamber 8. Self-driven electrolytes are placed in both the A anode electrolysis chamber 7 and the A cathode electrolysis chamber 8 to prepare oxygen and hydrogen respectively. Among them, the available self-driven electrolytes include but are not limited to: solids such as K2CO3, NaOH, KOH, Ca(OH)2, Na2CO3 or their solutions, and the self-driven electrolyte can also be replaced with other hygroscopic media such as glycerol, polyethylene glycol, sodium acrylate, sulfuric acid, etc.

[0066] ① Self-capture container

[0067] The self-capturing container includes: a porous insulating mesh tank 9 and an A solution mass transfer layer 10 coated outside the porous insulating mesh tank 9. A cavity is provided in the porous insulating mesh tank 9, and the A catalytic electrolysis module 17 is placed in the cavity. The impurities in seawater (non-pure aqueous solution) are blocked by the A solution mass transfer layer 10. In practical applications, the A solution mass transfer layer 10 is any one of TPU membranes, PDMS membranes, and PTFE membranes with a pore size of 0.1-100 um. Of course, in addition to the above methods, the A solution mass transfer layer 10 can also be a porous solution mass transfer layer prepared by spraying, screen printing, or electrostatic adsorption of graphene, PVDF particles, and PTFE particles.

[0068] The A solution mass transfer layer 10 is coated outside the entire porous insulating mesh tank 9. When the entire system enters seawater (non-pure aqueous solution), the A solution mass transfer layer 10 isolates the seawater (non-pure aqueous solution) and drives the mass transfer of the aqueous solution, prompting the self-driven electrolyte to induce the phase change of seawater (non-pure aqueous solution) to form impurity-free liquid water.

[0069] ② Catalytic electrolysis module

[0070] The A catalytic electrolysis module 17 includes: an A ion transfer layer 4, an A anode catalytic electrode 3 and an A cathode catalytic electrode 5 symmetrically arranged on both sides of the A ion transfer layer 4. The A ion transfer layer 4 includes, but is not limited to, polymer films such as polyester diaphragms, nylon diaphragms, ceramic porous diaphragms, anion exchange membranes, or PVA.

[0071] An A anode plate 2 and an A cathode plate 6 are respectively attached to the surfaces of the A anode catalytic electrode 3 and the A cathode catalytic electrode 5, and the A anode plate 2 and the A cathode plate 6 are respectively located in the A anode electrolysis chamber 7 and the A cathode electrolysis chamber 8. Among them, the A ion transfer layer 4, the A anode catalytic electrode 3, the A cathode catalytic electrode 5, the A anode plate 2, and the A cathode plate 6 are all embedded in the bottom of the inner cavity of the self-capturing container, thereby isolating the porous insulating mesh tank 9 into an A anode electrolysis chamber 7 and an A cathode electrolysis chamber 8 for storing the self-driven electrolyte.

[0072] Seawater (non-pure aqueous solution) enters the A anode electrolysis chamber 7 and the A cathode electrolysis chamber 8 and is induced to undergo a phase change by the self-driven electrolyte stored in the A anode electrolysis chamber 7 and the A cathode electrolysis chamber 8, and a hydrogen evolution reaction occurs on the surface of the A cathode catalytic electrode 5 to produce hydrogen. The reaction formula is as follows:

[0073] 2H2O + 2e - → H2 + 2OH - .

[0074] The generated OH⁻ is transferred to the A anode catalytic electrode 3 through the A ion transfer layer 4 (such as polyester diaphragm, nylon diaphragm, ceramic porous diaphragm, anion exchange membrane or polymer films such as PVA), and an oxidation reaction occurs to generate oxygen. The reaction formula is as follows:

[0075]

[0076] Among the above, the available A anode catalytic electrodes 3 include but are not limited to: nickel foam molybdenum, iridium tantalum, ruthenium iridium, NiFe-LDH, NiFeCu alloy, Ni x Fe y O z catalyst-loaded titanium mesh; the available A cathode catalytic electrodes 5 include but are not limited to: platinum mesh, nickel-plated platinum mesh, FexCoyNiz type catalysts, etc.

[0077] ③ Energy supply module

[0078] The A energy supply module 1 is respectively connected to the A anode plate 2 and the A cathode plate 6, and supplies power to the A anode plate 2 and the A cathode plate 6. For example, the energy source of the A energy supply module 1 can be electrical energy converted from renewable energy sources such as solar energy and wind energy. The electricity generated by renewable energy sources such as solar energy and wind energy or thermal power is stored in the A energy supply module 1, and the A energy supply module 1 is respectively connected to the A anode plate 2 and the A cathode plate 6, and is used to provide electrical energy for the hydrogen production reaction. The A energy supply module 1 supplies power to the A catalytic electrolysis module 17, directly obtains impurity-free moisture in seawater (non-pure aqueous solution) spontaneously, and the A catalytic electrolysis module 17 electrolyzes and catalyzes hydrogen production to achieve the overall in-situ direct electrolytic hydrogen production from seawater (non-pure aqueous solution) without desalination. In addition, the A energy supply module 1 can also directly utilize thermal power, hydropower, etc. Further, it can also be coupled with renewable energy sources such as wind power, photovoltaic, and nuclear energy to achieve green hydrogen production, thereby realizing the energy conversion of unstable renewable energy, and the formed hydrogen energy is conducive to stable storage.

[0079] Based on the above-provided in-situ direct electrolytic hydrogen production device from seawater without desalination, its working principle is as follows:

[0080] First, the A energy supply module 1 provides power for the A catalytic electrolysis module 17;

[0081] Secondly, the in-situ direct electrolytic hydrogen production system from seawater without desalination is directly immersed in water. Under the positive pushing action of the interface pressure difference or osmotic pressure between seawater (non-pure aqueous solution) and the self-driven electrolyte, seawater (non-pure aqueous solution) enters the self-capture container through the A solution mass transfer layer 10, and is induced to phase change by the low-vapor-pressure self-driven electrolyte to form an electrolyte solution. At the same time, the hydrophobic effect of the A solution mass transfer layer 10 blocks the impurities dissolved in seawater (non-pure aqueous solution) outside the system;

[0082] Finally, the catalytic hydrogen production module electrolyzes the purified water with self-driven electrolyte-induced phase change under the catalytic system. The water in the self-driven electrolyte is continuously consumed by electrolysis, and the self-driven electrolyte is induced to regenerate, maintaining the interfacial pressure difference, realizing the self-circulation excitation-driven hydrogen production of the system without additional energy consumption, and the total energy consumption is equivalent to that of freshwater electrolysis hydrogen production.

[0083] This seawater non-desalination in-situ direct electrolysis hydrogen production device obtains electric energy through the A energy supply module 1, obtains pure liquid water through the phase change induced by the self-driven electrolyte, and then uses the catalytic electrolysis principle to produce hydrogen. On the one hand, it can realize the dynamic continuous process of spontaneous capture and hydrogen production without time and space difference in any seawater (non-pure aqueous solution) environment; on the other hand, it can realize energy conversion and stable storage of unstable renewable energy, providing technical means for the construction of future energy systems.

[0084] When this seawater non-desalination in-situ direct electrolysis hydrogen production device is actually applied, its assembly method is not only applicable to regular shapes, but also can be replaced with special shapes to adapt to different regional environments.

[0085] Its implementation effect: The self-driven electrolyte is placed in the anode and cathode electrolysis chambers, and the electrolyte is formed by inducing the phase change of the aqueous solution. The current density of the system reaches 200 mA / cm at a voltage of 2 V 2 , as Figure 4 shown, with a high current density. This system can stably operate for more than 60 h at room temperature, 2 V, and a high current density of 200 mA / cm 2 , with good stability at a high current density, as Figure 5 shown.

[0086] Example 2

[0087] As Figure 2 shown, in this example, a seawater non-desalination in-situ direct electrolysis hydrogen production device is provided. The electric energy generated by renewable energy such as solar energy and wind energy or thermal power is stored in the B energy supply module 18, and the B energy supply module 18 is connected to the B anode plate 20 and the B cathode plate 25 in the in-situ self-capture hydrogen production device to provide electric energy for the hydrogen production reaction.

[0088] As Figure 2As shown in the figure, the B catalytic electrolysis module 35 is composed of a B anode catalytic electrode 22, a B ion transfer layer 23, and a B cathode catalytic electrode 24. On both sides of the B catalytic electrolysis module 35, it is closely attached to a B anode plate 20 and an anode porous insulating mesh groove 19, a B cathode plate 25 and a cathode porous insulating mesh groove 27 respectively. And a B anode electrolysis chamber 21 and a B cathode electrolysis chamber 26 are respectively opened on the B anode plate 20 and the B cathode plate 25, both of which are used to store the self-driven electrolyte. The entire system is immersed in seawater (non-pure aqueous solution), and mass transfer occurs spontaneously through the B solution mass transfer layer 28. The impurity components are isolated outside. The self-driven electrolyte induces a phase change to form liquid water in the B anode electrolysis chamber 21 and the B cathode electrolysis chamber 26, and a hydrogen evolution reaction by reduction occurs on the surface of the B cathode catalytic electrode 24. The reaction formula is as follows:

[0089] 2H2O + 2e - →H2 + 2OH - .

[0090] The generated OH - is transferred to the B anode catalytic electrode 22 through the B ion transfer layer 23 (anion exchange membrane), and an oxidation reaction occurs to generate oxygen. The reaction formula is as follows:

[0091]

[0092] The working principle of the above-provided seawater non-desalination in-situ direct electrolysis hydrogen production device is as follows:

[0093] First, only place the self-driven electrolyte K2CO3 solid or K2CO3 concentrated solution in the B anode electrolysis chamber 21 of the system (in fact, placing the self-driven electrolyte on the anode side or the cathode side, after forming the electrolyte solution, it will seep to the other side). The B cathode electrolysis chamber 26 is empty, and power is provided to the B catalytic electrolysis module 35 through the B energy supply module 18. For the specific description of the B energy supply module 18, refer to Embodiment 1, which will not be elaborated here;

[0094] Secondly, directly immerse the seawater non-desalination in-situ direct electrolysis hydrogen production device in seawater (non-pure aqueous solution). Under the action of the pressure difference between the seawater (non-pure aqueous solution) interface and the self-driven electrolyte interface, it enters the B anode electrolysis chamber 21 through the B solution mass transfer layer 28 and is induced by the low-vapor-pressure K2CO3 self-driven electrolyte to form liquid water. At the same time, the hydrophobic effect of the B solution mass transfer layer 28 blocks the impurities dissolved in the non-pure water outside the system; the water in the K2CO3 solution in the B anode electrolysis chamber 21 wets the surface of the B cathode catalytic electrode 24, and the water is reduced to hydrogen and OH on the cathode side - , OH - is transferred to the anode side through the anion exchange membrane and oxidized to generate oxygen.

[0095] Finally, the catalytic hydrogen production module electrolyzes the pure water captured by the K2CO3 deliquescent substance under the catalytic system. The water in the K2CO3 self-driven electrolyte is continuously consumed by electrolysis, inducing the regeneration of the electrolyte and maintaining the interfacial pressure difference, thus forming a continuous and stable electrolytic hydrogen production process.

[0096] This seawater non-desalination in-situ direct electrolytic hydrogen production device is powered by the B power supply module 18, forms pure liquid water by inducing phase change through the self-driven electrolyte, and then produces hydrogen using the catalytic electrolysis principle. On the one hand, it can achieve a dynamic continuous process of spontaneous capture and hydrogen production without time and space differences in any non-pure water environment; on the other hand, it can convert and stably store non-stable renewable energy, providing a technical means for the construction of future energy systems.

[0097] When this seawater non-desalination in-situ direct electrolytic hydrogen production device is actually applied, its assembly method is not only applicable to regular shapes but can also be replaced with special shapes to adapt to different regional environments.

[0098] Example 3

[0099] In this example, a seawater non-desalination in-situ direct electrolytic hydrogen production device is provided. The electricity generated by renewable energy such as solar energy and wind energy or thermal power is stored in the C power supply module 36. The C power supply module 36 is connected to the C anode electrode 38 and the C cathode electrode 42 in this in-situ self-capture hydrogen production device to provide electrical energy for the hydrogen production reaction.

[0100] As Figure 3 shown, the C anode plate 38 and the C cathode plate 42 jointly form the outer frame of the container. A C anode catalytic electrode 39, a C ion exchange layer 40, and a C cathode catalytic electrode 41 are provided between the C anode plate 38 and the C cathode plate 42. The anode solution mass transfer layer 37 and the cathode solution mass transfer layer 43 are closely attached to the outer sides of the C anode plate 38 and the C cathode plate 42 to automatically capture impurity-free water into the container. Among them, the C anode catalytic electrode 39 and the C cathode catalytic electrode 41 are respectively attached to the surfaces of the corresponding C anode plate 38 and C cathode plate 42.

[0101] The C catalytic electrolysis module 50 is composed of a C anode plate 38, a C anode catalytic electrode 39, a C ion exchange layer 40, a C cathode catalytic electrode 41, and a C cathode plate 42. The anode solution mass transfer layer 37 and the cathode solution mass transfer layer 43 are closely attached to both sides of the C catalytic electrolysis module 50. Exhaust grooves are respectively opened on the C anode plate 38 and the C cathode plate 42 to be able to discharge the oxygen and hydrogen generated by electrolysis respectively.

[0102] Immerse the entire system in seawater (non-pure aqueous solution). The anodic solution mass transfer layer 37 and the cathodic solution mass transfer layer 43 isolate liquid water, drive spontaneous mass transfer, and the self-driven electrolyte induces a phase change. The C ion exchange layer 40 adopts a self-driven electrolyte layer. The self-driven electrolyte layer has the function of inducing a phase change and ion conduction ability. A hydrogen evolution reduction reaction occurs on the surface of the C cathode catalytic electrode 41, and the reaction formula is as follows:

[0103] 2H2O + 2e - → H2 + 2OH - .

[0104] The produced hydrogen passes through the C hydrogen scrubber 47 and the C hydrogen dryer 48, removes the entrained substances in the hydrogen, and is collected through a pipeline into the C hydrogen collection bottle 49 for storage and further utilization. The generated OH- is transferred to the C anode catalytic electrode 39 through the C ion exchange layer 40 (the C ion exchange layer 40 is a self-driven electrolyte layer formed by compounding KOH on PVA gel), and an oxidation reaction occurs to generate oxygen. The reaction formula is as follows:

[0105]

[0106] The oxygen generated by the oxygen evolution reaction passes through the pipeline through the C oxygen scrubber 44 and the C oxygen dryer 45 and is collected into the C oxygen collection bottle 46.

[0107] Based on the above-provided seawater non-desalination in-situ direct electrolysis hydrogen production device, its working principle is as follows:

[0108] First, the C energy supply module 36 provides power for the C catalytic electrolysis module 50;

[0109] Secondly, directly immerse the seawater non-desalination in-situ direct electrolysis hydrogen production system in seawater (non-pure aqueous solution). Under the driving action of the pressure difference at the interface between seawater (non-pure aqueous solution) and the self-driven electrolyte, it enters the self-capture container through the anodic solution mass transfer layer 37 and the cathodic zero-energy consumption solution mass transfer layer 43 and is induced to change phase by the self-driven electrolyte layer (alkaline polymer materials, such as PAA-KOH composite membrane, PVA-KOH composite membrane, PVA-K2CO3 composite membrane). At the same time, the hydrophobic effect of the anodic solution mass transfer layer 37 and the cathodic solution mass transfer layer 43 blocks the impurities dissolved in seawater (non-pure aqueous solution) outside the system; the water inside the self-driven electrolyte is oxidized and reduced into oxygen and hydrogen, and at the same time, the OH - is transferred by the self-driven electrolyte.

[0110] Finally, the catalytic hydrogen production module electrolyzes the purified water induced by the phase change of the self-driven electrolyte under the catalytic system. The water in the self-driven electrolyte is continuously electrolyzed and consumed, inducing the regeneration of the self-driven electrolyte and maintaining the stability of the interfacial pressure difference, thereby forming a continuous and stable process of seawater (non-pure aqueous solution) in-situ direct electrolytic hydrogen production without desalination.

[0111] This seawater in-situ direct electrolytic hydrogen production device without desalination provides electrical energy through the C energy supply module 36, induces the phase change of the aqueous solution through the self-driven electrolyte, and then uses the catalytic electrolysis principle to produce hydrogen. On the one hand, it can achieve a dynamic continuous process of spontaneous hydrogen production capture without time and space differences in any non-pure water environment; on the other hand, it can convert and stably store unstable renewable energy, providing a technical means for the construction of future energy systems.

[0112] When this seawater in-situ direct electrolytic hydrogen production device is actually applied, its assembly method is not only applicable to regular shapes but can also be replaced with special shapes to adapt to different regional environments.

[0113] Its implementation effect: The self-driven electrolyte, as an ion exchange layer, not only spontaneously induces the phase change of the aqueous solution but also conducts ions. This system can stably operate at about 2.65 V under a current density of 100 mA / cm 2 for more than 50 h at room temperature, showing good stability at high current densities, as Figure 6 shown.

[0114] Example 4

[0115] In this example, a seawater in-situ direct electrolytic hydrogen production system is also provided. This hydrogen production system includes the seawater in-situ direct electrolytic hydrogen production device described in Example 1 above. This hydrogen production system further includes:

[0116] An oxygen collection unit and a hydrogen collection unit. Each of the oxygen collection unit and the hydrogen collection unit is communicated with the A anode electrolysis chamber 7 and the A cathode electrolysis chamber 8 respectively to dry and collect the produced oxygen and hydrogen.

[0117] Among them, the oxygen collection unit includes: an A oxygen scrubber 11 connected to the A anode electrolysis chamber 7, the A oxygen scrubber 11 is connected to an A oxygen dryer 12, the A oxygen dryer 12 is connected to an A oxygen collection bottle 13. The oxygen generated by the oxygen evolution reaction in the A anode electrolysis chamber 7 is washed and dried through the A oxygen scrubber 11 and the A oxygen dryer 12 via a pipeline, and is collected into the A oxygen collection bottle 13 for storage and further utilization. The hydrogen collection unit includes: an A hydrogen scrubber 14 connected to the A cathode electrolysis chamber 8, the A hydrogen scrubber 14 is connected to an A hydrogen dryer 15, the A hydrogen dryer 15 is connected to an A hydrogen collection bottle 16. The hydrogen produced by the reduction hydrogen evolution reaction in the A cathode electrolysis chamber 8 is washed and dried through the A hydrogen scrubber 14 and the A hydrogen dryer 15, removing the entrained substances in the hydrogen, and is collected into the A hydrogen collection bottle 16 via a pipeline for storage and further utilization.

[0118] Similarly, the hydrogen production system may also include the seawater non-desalination in-situ direct electrolysis hydrogen production device described in the above-mentioned Embodiment 2. The hydrogen production system further includes:

[0119] An oxygen collection unit and a hydrogen collection unit. Each of the oxygen collection unit and the hydrogen collection unit is connected to the B anode electrolysis chamber 21 and the B cathode electrolysis chamber 26 respectively to dry and collect the produced oxygen and hydrogen respectively.

[0120] Among them, the oxygen collection unit includes: a B oxygen scrubber 29 connected to the B anode electrolysis chamber 21, the B oxygen scrubber 29 is connected to a B oxygen dryer 30, the B oxygen dryer 30 is connected to a B oxygen collection bottle 31. The oxygen generated by the oxygen evolution reaction in the B anode electrolysis chamber 21 is washed and dried through the B oxygen scrubber 29 and the B oxygen dryer 30 via a pipeline, and is collected into the B oxygen collection bottle 31 for storage and further utilization. The hydrogen collection unit includes: a B hydrogen scrubber 32 connected to the B cathode electrolysis chamber 26, the B hydrogen scrubber 32 is connected to a B hydrogen dryer 33, the B hydrogen dryer 33 is connected to a B hydrogen collection bottle 34. The hydrogen produced by the reduction hydrogen evolution reaction in the B cathode electrolysis chamber 26 is washed and dried through the B hydrogen scrubber 32 and the B hydrogen dryer 33, removing the entrained substances in the hydrogen, and is collected into the B hydrogen collection bottle 34 via a pipeline for storage and further utilization.

[0121] Similarly, the hydrogen production system may also include the seawater non-desalination in-situ direct electrolysis hydrogen production device described in the above-mentioned Embodiment 3. The hydrogen production system further includes:

[0122] An oxygen collection unit and a hydrogen collection unit. Each of the oxygen collection unit and the hydrogen collection unit is connected to the C anode electrolysis chamber and the C cathode electrolysis chamber respectively to dry and collect the produced oxygen and hydrogen respectively.

[0123] Among them, the oxygen collection unit includes: a C oxygen scrubber 44 communicated with the C anode electrolysis chamber, the C oxygen scrubber 44 is connected with a C oxygen dryer 45, the C oxygen dryer 45 is connected with a C oxygen collection bottle 46, and the oxygen generated by the oxygen evolution reaction in the C anode electrolysis chamber is washed and dried through the C oxygen scrubber 44 and the C oxygen dryer 45 through a pipeline, and collected into the C oxygen collection bottle 46 for storage and further utilization. The hydrogen collection unit includes: a C hydrogen scrubber 47 communicated with the C cathode electrolysis chamber, the C hydrogen scrubber 47 is connected with a C hydrogen dryer 48, the C hydrogen dryer 48 is connected with a C hydrogen collection bottle 49, and the hydrogen produced by the reduction hydrogen evolution reaction in the C cathode electrolysis chamber is washed and dried through the C hydrogen scrubber 47 and the C hydrogen dryer 48, and the impurities entrained in the hydrogen are removed, and then collected through a pipeline into the C hydrogen collection bottle 49 for storage and further utilization.

[0124] The entire system can be designed into an integrated system that is convenient to carry or for large-scale preparation according to the demand of hydrogen production, and can be used in any non-pure water system environment including sludge, swamps, rivers, lakes, and industrial wastewater, and can carry out continuous in-situ hydrogen production work without being restricted by time and space.

[0125] Example 5

[0126] In this embodiment, a method for in-situ direct electrolysis of seawater without desalination to produce hydrogen is also provided. This hydrogen production method uses the in-situ direct electrolysis of seawater without desalination device described in the above Example 1, Example 2, or Example 3. This hydrogen production method includes:

[0127] Immerse the in-situ direct electrolysis of seawater without desalination device into non-pure water to achieve immersion electrolysis of hydrogen production in non-pure water; or directly place the in-situ direct electrolysis of seawater without desalination device in the atmosphere to capture the moisture in the atmosphere for hydrogen production;

[0128] Start the energy supply module to supply power to the catalytic electrolysis module in the in-situ direct electrolysis of seawater without desalination device for operation. The oxygen and hydrogen generated by decomposition are respectively collected after purification, drying and other post-treatment for further utilization.

[0129] By directly immersing the self-capturing hydrogen production device in water or the atmosphere, under the driving action of the interfacial pressure difference, through the solution mass transfer layer, in-situ direct electrolysis of seawater (non-pure aqueous solution) without desalination is carried out. The self-driven electrolyte is induced to phase change by the self-driven electrolyte to form an electrolyte self-driven electrolyte. At the same time, the hydrophobic effect of the solution mass transfer layer blocks the impurities dissolved in non-pure water outside the system. Under the catalytic system, electrolysis of hydrogen production is carried out on the self-driven electrolyte pure water induced by the self-driven electrolyte to phase change, and the self-driven electrolyte is regenerated to maintain the interfacial pressure difference, realizing the self-circulation excitation drive of the system without additional energy consumption, and the total energy consumption is equivalent to that of hydrogen production by electrolysis of fresh water.

[0130] The present invention is not limited to the above optional embodiments, and any person can obtain other various forms of products under the inspiration of the present invention. However, no matter what changes are made in its shape or structure, as long as the technical solutions fall within the scope defined by the claims of the present invention, they are all within the protection scope of the present invention.

Claims

1. Seawater non-desalination in-situ direct electrolysis hydrogen production device, characterized in that, The hydrogen production device includes: A self-capturing container for spontaneously obtaining impurity-free moisture through the self-capturing container; The catalytic electrolysis module disposed within the self-capturing container divides the self-capturing container into an anodic electrolysis chamber and a cathodic electrolysis chamber through the catalytic electrolysis module, and forms a self-driven electrolyte at least within the cathodic electrolysis chamber; the self-driven electrolyte is first electrolyzed within the cathodic electrolysis chamber to prepare hydrogen and OH - , and OH - enters the anodic chamber through the catalytic electrolysis module and is electrolyzed to prepare oxygen; The self-capturing container includes: A porous insulating mesh tank, with a cavity provided inside the porous insulating mesh tank, and the catalytic electrolysis module is disposed inside the cavity; A solution mass transfer layer coated outside the porous insulating mesh tank for blocking impurities in seawater through the solution mass transfer layer; The catalytic electrolysis module includes: An ion transfer layer for transferring OH between the anode electrolysis chamber and the cathode electrolysis chamber - ions and blocking the mixing of O2 generated on the anode side and H2 generated on the cathode side; An anode catalytic electrode and a cathode catalytic electrode symmetrically arranged on both sides of the ion transfer layer. An anode plate and a cathode plate are respectively attached to the sides of the anode catalytic electrode and the cathode catalytic electrode, and the anode electrolysis chamber and the cathode electrolysis chamber are respectively formed between the anode plate and the cathode plate and the self-capturing container; Wherein, the ion transfer layer, the anode catalytic electrode, the cathode catalytic electrode, the anode plate, and the cathode plate are all embedded in the inner cavity of the self-capturing container.

2. In-situ direct electrolysis hydrogen production device without seawater desalination, characterized in that, The hydrogen production device includes: A self-capturing container for spontaneously obtaining impurity-free moisture through the self-capturing container; The catalytic electrolysis module disposed within the self-capture container divides the self-capture container into an anode electrolysis chamber and a cathode electrolysis chamber through the catalytic electrolysis module, and at least forms a self-driven electrolyte within the cathode electrolysis chamber; the self-driven electrolyte is first electrolyzed in the cathode electrolysis chamber to prepare hydrogen and OH - , and OH - enters the anode chamber through the catalytic electrolysis module and is electrolyzed to prepare oxygen; The self-capturing container includes: A solution mass transfer layer, with a cavity provided inside the solution mass transfer layer, and the catalytic electrolysis module is disposed inside the cavity; An anode plate and a cathode plate respectively closely attached to both sides of the catalytic electrolysis module. An anode porous insulating mesh tank is closely attached between the anode plate and the cavity, and a cathode porous insulating mesh tank is closely attached between the cathode plate and the cavity; Wherein, the anode electrolysis chamber and the cathode electrolysis chamber are respectively provided on the anode plate and the cathode plate; The catalytic electrolysis module includes: An ion transfer layer for transferring OH - ions between the anode electrolysis chamber and the cathode electrolysis chamber; An anode catalytic electrode and a cathode catalytic electrode symmetrically arranged on both sides of the ion transfer layer. An anode plate is closely attached to the anode catalytic electrode, and a cathode plate is closely attached to the cathode catalytic electrode.

3. The seawater in-situ direct electrolysis hydrogen production device according to claim 1 or 2, characterized in that, The solution mass transfer layer adopts any one of TPU membranes, PDMS membranes, and PTFE membranes with a pore size of 0.1 - 100um; Or the solution mass transfer layer is made of graphene, PVDF particles, and PTFE particles prepared by spraying, screen printing, or electrostatic adsorption.

4. The seawater in-situ direct electrolysis hydrogen production device according to claim 1 or 2, characterized in that, It further includes a power supply module, and the power supply module is electrically connected to the anode plate and the cathode plate respectively and supplies power to the anode plate and the cathode plate respectively.

5. In-situ direct electrolysis hydrogen production system without seawater desalination, characterized in that, The hydrogen production system includes at least one seawater non-desalination in-situ direct electrolysis hydrogen production device as described in any one of claims 1 - 2 and 4. The hydrogen production system further includes: At least one oxygen collection unit and at least one hydrogen collection unit, and each of the oxygen collection unit and the hydrogen collection unit is communicated with the anode electrolysis chamber and the cathode electrolysis chamber respectively.

6. The in-situ direct electrolysis hydrogen production system for seawater without desalination according to claim 5, wherein The oxygen collection unit includes: an oxygen scrubber communicated with the anode electrolysis chamber, the oxygen scrubber is connected with an oxygen dryer, and the oxygen dryer is connected with an oxygen collection bottle; The hydrogen collection unit includes: a hydrogen scrubber communicated with the cathode electrolysis chamber, the hydrogen scrubber is connected with a hydrogen dryer, and the hydrogen dryer is connected with a hydrogen collection bottle.

7. Method for directly electrolyzing seawater in-situ without desalination to produce hydrogen, characterized in that, The hydrogen production method adopts a seawater non-desalination in-situ direct electrolysis hydrogen production device as described in any one of claims 1 - 2 and 4. The specific method includes: Blocking seawater and impurity ions outside through the solution mass transfer layer to achieve selective passage of water vapor, and self-driven electrolyte induces the phase change and liquefaction of water vapor under the action of interfacial vapor pressure or osmotic pressure difference to obtain impurity-free ion water; Hydrogen and OH are prepared by the hydrogen evolution reaction of water in the self-driven electrolyte on the cathode side of hydrogen production electrolysis - , and OH - is transferred by ions to the anode side of hydrogen production electrolysis and oxygen is prepared by the oxygen evolution reaction on the anode side; Among them, during the hydrogen production electrolysis process, as the water in the self-driven electrolyte is continuously electrolyzed and consumed, it induces the regeneration of the self-driven electrolyte, forming a self-circulating excitation-driven hydrogen production without additional energy consumption.

Images