Hydrogen peroxide module based on critical plane electrochemical reaction and hydrogen peroxide generator

Abstract

The utility model relates to the technical field of electrochemical generation devices, in particular to a hydrogen peroxide module based on critical surface electrochemical reaction and a hydrogen peroxide generator, which are characterized in that a cathode assembly is arranged, and one side of the cathode assembly is in contact with air to form a gas-solid critical surface, so that oxygen in the air can be utilized in cathode reaction; compared with a traditional process which is limited by dissolved oxygen in water, sufficient and continuous oxygen sources can be provided for the cathode reaction, and the other side of the cathode assembly is in contact with the electrolyte to form a solid-liquid critical surface, so that the reaction can be continuously carried out, and the reaction efficiency is improved. Therefore, the efficiency and equilibrium concentration of an electrochemical synthesis product are improved, and the problems that in an existing hydrogen peroxide preparation process, propulsion of a cathode reaction depends on consumption of dissolved oxygen, however, due to the fact that the content of the dissolved oxygen in water has an upper limit, the efficiency of the electrochemical synthesis product is difficult to improve in the reaction process, and the reaction time is shortened are effectively solved. And the equilibrium concentration of the product is also limited.

Description

Technical Field

[0001] This utility model relates to the field of electrochemical generating device technology, specifically a hydrogen peroxide module and hydrogen peroxide generator based on critical surface electrochemical reaction. Background Technology

[0002] Electrochemical devices, as an important type of energy conversion equipment, primarily function to convert between electrical energy and chemical energy. An electrochemical device includes an external power source, a cathode, an anode, and an electrolyte solution or molten electrolyte as the ion-conducting medium. Once the external power source is connected to the electrochemical device, current begins to flow inside. When the current flows through the electrolyte, it drives specific chemical reactions at the cathode and anode. In the cathode region, electrons carried by the current cause positive ions to accept electrons, resulting in a reduction reaction. In the anode region, the outflow of electrons causes substances to lose electrons, resulting in an oxidation reaction.

[0003] In the traditional hydrogen peroxide preparation process, the advancement of the cathode reaction depends on the consumption of dissolved oxygen. However, due to the upper limit of dissolved oxygen content in water, it is difficult to improve the efficiency of electrochemical synthesis of products during the reaction process, and the equilibrium concentration of the products is also limited.

[0004] This utility model was proposed in response to the shortcomings of the existing technology. Utility Model Content

[0005] In the existing hydrogen peroxide preparation process mentioned above, the advancement of the cathode reaction depends on the consumption of dissolved oxygen. However, due to the upper limit of dissolved oxygen content in water, the efficiency of electrochemical synthesis of products is difficult to improve during the reaction, and the equilibrium concentration of the products is also limited. The technical solution adopted by this utility model to solve this problem is as follows:

[0006] A hydrogen peroxide module based on critical surface electrochemical reaction includes a module housing. The module housing has a liquid cavity for containing electrolyte, a top opening communicating with the liquid cavity, a cathode assembly located on the side of the liquid cavity near the top opening, and an anode assembly located on the side of the liquid cavity away from the top opening. The side of the cathode assembly facing the top opening is in contact with air to form a gas-solid critical surface, and the side facing away from the top opening is in contact with the electrolyte to form a solid-liquid critical surface.

[0007] Furthermore, the cathode assembly includes a cathode sheet and a cathode support for mounting the cathode sheet, the anode assembly includes an anode sheet and an anode support for mounting the anode sheet and detachably connected to the cathode support, and the module housing includes a first housing and a second housing detachably connected to the first housing and the cathode support respectively.

[0008] Furthermore, the top opening is located on the second housing, the cathode support is provided with a cathode support opening communicating with the top opening, the cathode plate is connected to the top opening through the cathode support opening, the anode support is provided with an anode support opening, and the anode plate is connected to the liquid cavity through the anode support opening.

[0009] Furthermore, the cathode assembly is provided in multiple sets and arranged at intervals, and the anode assembly and the top opening are both arranged corresponding to the cathode assembly.

[0010] Furthermore, the second housing is provided with a cathode limit groove for fixing the cathode support. The cathode support includes an upper cathode support detachably connected to the second housing and a lower cathode support detachably connected to the upper cathode support. A cathode mounting cavity for mounting the cathode sheet is provided between the upper cathode support and the lower cathode support. The first housing is provided with an anode limit bracket for fixing the anode support. The anode support includes an upper anode support detachably connected to the lower cathode support and a lower anode support detachably connected to the upper anode support. An anode mounting cavity for mounting the anode sheet is provided between the upper anode support and the lower anode support.

[0011] Furthermore, the second housing is provided with a cathode electrode current collector and an anode electrode current collector. The upper cathode support is provided with a wire outlet hole. The cathode plate extends to one end to form a cathode terminal, and the anode plate extends to one end to form an anode terminal. A cathode wire outlet protrusion for accommodating the cathode terminal is provided between the upper cathode support and the lower cathode support. The cathode terminal is connected to the cathode electrode current collector through the wire outlet hole. An anode wire outlet protrusion for accommodating the anode terminal and offset from the cathode wire outlet protrusion is provided between the upper anode support and the lower anode support. The anode terminal is connected to the anode electrode current collector through the wire outlet hole.

[0012] Furthermore, the first housing is provided with an inlet for connecting the liquid cavity and an external water pump on one side, and a buffer baffle located on the side of the liquid cavity near the inlet.

[0013] Furthermore, the first housing is provided with a guide plate on the side away from the water inlet for connecting the liquid cavity and the outside. The guide plate is inclined from the liquid cavity to the outside. The horizontal position of the guide plate on the side near the liquid cavity is higher than the horizontal position of the bottom of the cathode plate and lower than the horizontal position of the surface of the cathode plate.

[0014] Furthermore, the cathode sheet has a thickness of 0.8-1.2 mm and is made of a conductive inert metal material, the anode sheet is made of a metal-coated substrate, and the bottom of the cathode sheet is provided with a hydrophobic and breathable catalytic layer.

[0015] This invention also provides a hydrogen peroxide generator, including the hydrogen peroxide module based on critical surface electrochemical reaction as described above.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention, by setting up a cathode assembly, forms a gas-solid critical surface with the side of the cathode assembly facing the top opening in contact with air. This allows the cathode reaction to utilize oxygen from the air, rather than solely relying on dissolved oxygen in the electrolyte. Compared to traditional processes that are limited by dissolved oxygen in water, this provides a sufficient and continuous oxygen source for the cathode reaction. Meanwhile, the side of the cathode assembly facing away from the top opening forms a solid-liquid critical surface with the electrolyte, allowing the reaction to proceed continuously. This improves the efficiency and equilibrium concentration of the electrochemically synthesized products, effectively solving the problem in existing hydrogen peroxide preparation processes where the cathode reaction depends on the consumption of dissolved oxygen. However, due to the upper limit of dissolved oxygen content in water, the efficiency of electrochemically synthesized products is difficult to improve, and the equilibrium concentration of the products is also limited.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is one of the structural schematic diagrams of the hydrogen peroxide module of this utility model;

[0020] Figure 2 This is the second schematic diagram of the hydrogen peroxide module of this utility model;

[0021] Figure 3 for Figure 2 Cross-sectional view and enlarged view along line AA;

[0022] Figure 4 This is an exploded view of the hydrogen peroxide module of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the second shell of this utility model;

[0024] Figure 6 This is a schematic diagram of the connection between the cathode assembly and the anode assembly of this utility model;

[0025] Figure 7 This is an exploded view showing the connection between the cathode assembly and the anode assembly of this utility model;

[0026] Figure 8 This is the third schematic diagram of the hydrogen peroxide module of this utility model, and a partially enlarged schematic diagram. Detailed Implementation

[0027] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] like Figures 1 to 8 The hydrogen peroxide module based on critical surface electrochemical reaction shown includes a module housing 1. The module housing 1 has a liquid inner cavity 2 for containing electrolyte, a top opening 3 communicating with the liquid inner cavity 2, a cathode assembly 4 located on the side of the liquid inner cavity 2 near the top opening 3, and an anode assembly 5 located on the side of the liquid inner cavity 2 away from the top opening 3. The side of the cathode assembly 4 facing the top opening 3 is in contact with air to form a gas-solid critical surface 401, and the side facing away from the top opening 3 is in contact with the electrolyte to form a solid-liquid critical surface 402.

[0029] This invention, by setting up a cathode assembly, forms a gas-solid critical surface with the side of the cathode assembly facing the top opening in contact with air. This allows the cathode reaction to utilize oxygen from the air, rather than solely relying on dissolved oxygen in the electrolyte. Compared to traditional processes that are limited by dissolved oxygen in water, this provides a sufficient and continuous oxygen source for the cathode reaction. Meanwhile, the side of the cathode assembly facing away from the top opening forms a solid-liquid critical surface with the electrolyte, allowing the reaction to proceed continuously. This improves the efficiency and equilibrium concentration of the electrochemically synthesized products, effectively solving the problem in existing hydrogen peroxide preparation processes where the cathode reaction depends on the consumption of dissolved oxygen. However, due to the upper limit of dissolved oxygen content in water, the efficiency of electrochemically synthesized products is difficult to improve, and the equilibrium concentration of the products is also limited.

[0030] Furthermore, the side of the cathode assembly 4 facing away from the top opening 3 contacts the electrolyte to form a solid-liquid critical surface 402, which is conducive to the electrochemical reaction. At the solid-liquid critical surface 402, oxygen can react more efficiently with ions in the electrolyte, thereby increasing the generation rate of hydrogen peroxide.

[0031] Furthermore, by forming a gas-solid critical surface 401 and a solid-liquid critical surface 402, the oxygen obtained from the air at the gas-solid critical surface 401 can be rapidly transferred to the solid-liquid critical surface 402 and then participate in the cathode reaction, which helps to increase the equilibrium concentration of the product and realize the continuous preparation of high-concentration hydrogen peroxide.

[0032] Optionally, in some embodiments, the cathode assembly 4 has a side opening on the side facing away from the top opening 3 that communicates with the liquid cavity 2, and the cathode assembly 4 communicates with the liquid cavity 2 through the side opening.

[0033] Optionally, in some embodiments, the bottom of the cathode assembly 4 is provided with a bottom opening that communicates with the liquid cavity 2, and the cathode assembly 4 communicates with the liquid cavity 2 through the bottom opening.

[0034] Optionally, in some embodiments, the cathode assembly 4 has a side opening on the side facing away from the top opening 3 and a bottom opening at the bottom. Both the side opening and the bottom opening communicate with the liquid cavity 2, and the cathode assembly 4 communicates with the liquid cavity 2 through both the side opening and the bottom opening.

[0035] Optionally, in some embodiments, adhesive may be applied to the side of the cathode assembly 4 facing away from the top opening 3 to prevent electrolyte leakage and the cathode assembly 4 surface from being immersed in electrolyte. The adhesive may be silicone adhesive or epoxy resin adhesive.

[0036] Furthermore, the module housing 1 is made of corrosion-resistant resin material, such as acrylonitrile-butadiene-styrene copolymer (ABS) or polypropylene (PP). The electrolyte used in the preparation of hydrogen peroxide usually has a certain degree of chemical corrosivity. Both ABS and PP have good chemical corrosion resistance and can resist the erosion of the electrolyte, ensuring that the module housing 1 will not be damaged due to contact with the electrolyte, which is beneficial to extending the service life of the module housing 1.

[0037] like Figures 1 to 8 The cathode assembly 4 shown includes a cathode plate 41 and a cathode support 42 for mounting the cathode plate 41. The anode assembly 5 includes an anode plate 51 and an anode support 52 for mounting the anode plate 51 and detachably connected to the cathode support 42. The module housing 1 includes a first housing 11 and a second housing 12 detachably connected to the first housing 11 and the cathode support 42, respectively.

[0038] Furthermore, the cathode assembly 4 is composed of cathode support 42 and cathode plate 41, the anode assembly 5 is composed of anode support 52 and anode plate 51, and the module housing 1 is composed of first housing 11 and second housing 12. The modular design allows each module to be assembled and debugged separately before being assembled as a whole, which simplifies the installation process and effectively improves the assembly efficiency.

[0039] Furthermore, if a component is damaged or aged, only the corresponding component needs to be replaced, rather than the entire module, which greatly reduces maintenance costs and improves resource utilization efficiency.

[0040] Furthermore, the detachable and modular structure allows users to easily upgrade and expand the module's components according to actual needs, thereby improving the performance and efficiency of the hydrogen peroxide module.

[0041] Optionally, the first housing 11 and the second housing 12 may be connected by threaded connection, snap-fit ​​connection, slot connection, or other connection methods.

[0042] like Figures 1 to 8 The top opening 3 shown is located on the second housing 12. The cathode support 42 is provided with a cathode support opening 420 communicating with the top opening 3. The cathode plate 41 communicates with the top opening 3 through the cathode support opening 420. The anode support 52 is provided with an anode support opening 520. The anode plate 51 communicates with the liquid inner cavity 2 through the anode support opening 520.

[0043] Furthermore, the connection between the top opening 3, the cathode support opening 420, and the cathode plate 41 forms a smooth gas passage, allowing air to directly contact the surface of the cathode plate 41. Oxygen in the air can continuously reach the surface of the cathode plate 41, providing a sufficient oxygen source for the cathode reaction. In the electrochemical synthesis of hydrogen peroxide, the cathode reaction is usually a process in which oxygen gains electrons and is reduced. A sufficient oxygen supply is a key factor in ensuring the efficient progress of the reaction.

[0044] Furthermore, the anode support opening 520 connects the anode plate 51 to the liquid cavity 2, providing the anode plate 51 with sufficient contact with the electrolyte. The anode reaction is usually an oxidation reaction that occurs in the electrolyte. The anode plate 51 can directly react with the ions in the electrolyte, ensuring the smooth progress of the anode reaction.

[0045] Optionally, in some embodiments, the side of the anode support 52 is also provided with a side opening communicating with the liquid cavity 2.

[0046] Optionally, in some embodiments, the bottom of the anode support 52 is also provided with a bottom opening communicating with the liquid cavity 2.

[0047] like Figures 1 to 8 The cathode assembly 4 shown is provided in multiple sets and arranged at intervals, and the anode assembly 5 and the top opening 3 are both arranged corresponding to the cathode assembly 4;

[0048] Furthermore, the arrangement of multiple cathode components 4 can directly increase the total area of ​​the cathode sheet 41, thereby expanding the area of ​​the electrode reaction. In the electrochemical synthesis of hydrogen peroxide, the cathode reaction is the key step in which oxygen gains electrons and is reduced. A larger reaction area allows more oxygen molecules to contact and react with the active sites on the surface of the cathode sheet 41 at the same time, thereby significantly improving the reaction rate and the generation efficiency of hydrogen peroxide.

[0049] Furthermore, the multiple sets of cathode plates 41 are in contact with the electrolyte, increasing the area and opportunities for ion exchange. During the reaction, the transport of ions between the electrode surface and the electrolyte is smoother, which helps to balance the charge distribution and enable the reaction to proceed more efficiently.

[0050] Specifically, the number of cathode components 4 is the same as the number of anode components 5 and top openings 3. Multiple sets of cathode components 4 and multiple sets of anode components 5 are evenly spaced in the liquid cavity 2 in a grid pattern. The multiple sets of cathode components 4 and anode components 5 cooperate with each other to make the reaction process more stable. When a certain set of electrodes experiences slight performance fluctuations or failures, the electrodes of other sets can still continue to work normally, ensuring the stable operation of the entire module and reducing the risk of system failure due to local faults.

[0051] like Figures 1 to 8 The second housing 12 shown is provided with a cathode limit groove 121 for fixing the cathode support 42. The cathode support 42 includes an upper cathode support 421 detachably connected to the second housing 12 and a lower cathode support 422 detachably connected to the upper cathode support 421. A cathode mounting cavity 423 for mounting the cathode plate 41 is provided between the upper cathode support 421 and the lower cathode support 422. The first housing 11 is provided with an anode limit bracket 111 for fixing the anode support 52. The anode support 52 includes an upper anode support 521 detachably connected to the lower cathode support 422 and a lower anode support 522 detachably connected to the upper anode support 521. An anode mounting cavity 523 for mounting the anode plate 51 is provided between the upper anode support 521 and the lower anode support 522.

[0052] Optionally, the upper cathode support 421 and the lower cathode support 422 can be connected by threaded connection, snap-fit ​​connection, slot connection, or other connection methods.

[0053] Optionally, the upper anode bracket 521 and the lower anode bracket 522 can be connected by threaded connection, snap-fit ​​connection, slot connection, or other connection methods.

[0054] Optionally, the upper anode support 521 and the lower cathode support 422 can be connected by threaded connection, snap-fit ​​connection, slot connection, or other connection methods.

[0055] Furthermore, when the module requires maintenance or repair, since the components are detachably connected, users can easily disassemble the cathode support 42 and the anode support 52 to inspect, clean, or replace the cathode plate 41 and the anode plate 51.

[0056] Furthermore, the cathode mounting cavity 423 and the anode mounting cavity 523 provide a relatively stable mounting environment for the cathode plate 41 and the anode plate 51, which can prevent the cathode plate 41 and the anode plate 51 from shifting or shaking during use, ensuring good contact between the cathode plate 41 and the anode plate 51 and the electrolyte, and improving the reaction efficiency. At the same time, the cathode mounting cavity 423 and the anode mounting cavity 523 can also play a certain protective role for the cathode plate 41 and the anode plate 51, reducing the damage to the cathode plate 41 and the anode plate 51 caused by external factors.

[0057] like Figures 1 to 8 The second housing 12 shown is provided with a cathode electrode current collector 122 and an anode electrode current collector 123. The upper cathode support 421 is provided with a wire outlet through hole 4211. The cathode plate 41 extends to one end to form a cathode terminal 411, and the anode plate 51 extends to one end to form an anode terminal 511. A cathode wire outlet protrusion 61 for accommodating the cathode terminal 411 is provided between the upper cathode support 421 and the lower cathode support 422. The cathode terminal 411 is connected to the cathode electrode current collector 122 through the wire outlet through hole 4211. An anode wire outlet protrusion 62 for accommodating the anode terminal 511 and offset from the cathode wire outlet protrusion 61 is provided between the upper anode support 521 and the lower anode support 522. The anode terminal 511 is connected to the anode electrode current collector 123 through the wire outlet through hole 4211.

[0058] Furthermore, the cathode terminal 411 and the anode terminal 511 are respectively connected to the corresponding current collector, which can reduce the contact resistance between the electrode and the external circuit. The low contact resistance helps to reduce the heat generation of electrical energy at the contact point, ensuring the stability and reliability of current transmission, thereby improving the performance and service life of the device.

[0059] Furthermore, by setting the cathode electrode current collector 122 and the anode electrode current collector 123, the wiring of the cathode plate 41 and the anode plate 51 is concentrated at a specific position on the second housing 12, making the connection of the external circuit more convenient and standardized. During assembly and maintenance, it is only necessary to connect the external circuit to the cathode electrode current collector 122 and the anode electrode current collector 123, without having to operate directly on the wiring terminals on the cathode plate 41 and the anode plate 51, thus reducing the difficulty of operation and the risk of errors.

[0060] Furthermore, the arrangement of the cathode lead-out protrusion 61 and the anode lead-out protrusion 62 cleverly utilizes the space between the upper cathode support 421 and the lower cathode support 422, and the upper anode support 521 and the lower anode support 522, to accommodate the wiring terminals inside these protrusions, avoiding the wiring terminals occupying too much external space and making the structure of the entire device more compact.

[0061] Furthermore, the staggered arrangement of the cathode lead-out protrusion 61 and the anode lead-out protrusion 62 effectively avoids mutual interference between the cathode terminal 411 and the anode terminal 511, which helps to ensure clear and neat wiring and reduces safety hazards such as short circuits caused by messy wiring.

[0062] like Figures 1 to 8 The first housing 11 shown is provided with an inlet 112 for connecting the liquid inner cavity 2 and the external water pump on one side, and a buffer baffle 113 located on the side of the liquid inner cavity 2 near the inlet 112;

[0063] Furthermore, the inlet 112 clearly defines the channel for the electrolyte to enter the liquid cavity 2, allowing the electrolyte to flow in regularly. In conjunction with the buffer baffle 113, it can guide the incoming electrolyte, making the electrolyte more evenly dispersed in the liquid cavity, avoiding direct impact of the electrolyte on the electrode plates, and ensuring that the entire reaction area receives a sufficient supply of electrolyte.

[0064] Furthermore, the buffer baffle 113 is located on the side of the liquid cavity 2 near the inlet 112. When the electrolyte flows in at high speed from the inlet 112, the buffer baffle 113 can effectively buffer the impact force of the water flow, avoiding damage or displacement of the electrode sheet due to excessive water flow impact force, and ensuring the stability and normal operation of the electrode sheet.

[0065] Optionally, in some embodiments, the buffer baffle 113 is an arc-shaped buffer baffle. The arc-shaped structure allows the water to flow smoothly along the arc-shaped surface, which reduces the energy loss and turbulence of the water flow while changing the direction of the water flow. The arc-shaped buffer baffle is also provided with outlets that communicate with the liquid cavity 2 on both sides near the inlet 112.

[0066] Optionally, in some embodiments, the buffer baffle 113 is a folded plate type buffer baffle. The baffle is in the shape of a folded line and is composed of multiple straight plate segments connected together. When the water flow impacts the folded plate type buffer baffle, the water flow will change direction multiple times at different angles of the folded plate, thereby consuming more kinetic energy and achieving a better buffering effect. The folded plate type buffer baffle is also provided with outlets that communicate with the liquid inner cavity 2 on both sides near the water inlet 112.

[0067] Optionally, in some embodiments, the buffer baffle 113 is a spiral flow-guiding buffer baffle, and the surface of the baffle is configured as a spiral flow-guiding groove. The water flows along the spiral path to the liquid inner cavity 2, thereby consuming more kinetic energy and achieving a better buffering effect.

[0068] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the buffer baffle 113 is a flat buffer baffle, including a first baffle arranged parallel to the inner wall of the first housing 11, a second baffle and a third baffle arranged symmetrically, the second baffle and the third baffle are both vertically connected to the first baffle, and the second baffle and the third baffle are both provided with an outlet communicating with the liquid inner cavity 2.

[0069] like Figures 1 to 8 The first housing 11 shown is provided with a guide plate 114 on the side away from the water inlet 112 for connecting the liquid inner cavity 2 and the outside. The guide plate 114 is inclined from the liquid inner cavity 2 to the outside. The horizontal position of the guide plate 114 on the side near the liquid inner cavity 2 is higher than the horizontal position of the bottom of the cathode plate 41 and lower than the horizontal position of the surface of the cathode plate 41.

[0070] Furthermore, the guide plate 114 is inclined from the inner liquid cavity 2 to the outside, providing a clear flow direction for the electrolyte. After the electrolyte completes its reaction with the electrode, it can flow smoothly from the inner liquid cavity 2 to the outside along the inclined angle of the guide plate 114, avoiding disordered flow or local accumulation of the electrolyte in the inner liquid cavity 2, and ensuring the smooth flow of the electrolyte in the entire reaction system.

[0071] Furthermore, the inclined guide plate 114, in conjunction with the inlet 112, can form a good circulation flow pattern in the liquid cavity 2. The fresh electrolyte flowing in from the inlet 112 pushes the electrolyte after the reaction to flow in the direction of the guide plate 114, and then discharges through the guide plate 114. This helps to maintain the uniformity of electrolyte concentration in the liquid cavity 2, so that the reactants can be continuously transported to the electrode surface for reaction, and the reaction products can be output in a timely manner.

[0072] Furthermore, the horizontal position of the guide plate 114 near the liquid cavity 2 is higher than the horizontal position of the bottom of the cathode plate 41 and lower than the horizontal position of the surface of the cathode plate 41. This ensures that the cathode plate 41 is always partially immersed in the electrolyte, and that the cathode plate 41 is in full contact with the electrolyte, which is conducive to electron transfer and chemical reaction, thereby improving the efficiency of the cathode reaction. At the same time, it avoids the situation where the cathode plate 41 is completely submerged in the electrolyte.

[0073] like Figures 1 to 8 The cathode sheet 41 shown has a thickness of 0.8-1.2 mm and is made of conductive inert metal material. The anode sheet 51 is made of metal-coated substrate. The bottom of the cathode sheet 41 is provided with a hydrophobic and breathable catalytic layer.

[0074] Furthermore, the thickness of the cathode plate 41 is set at 0.8-1.2mm, which ensures that the cathode plate 41 has sufficient mechanical strength, so that the cathode plate 41 is not easily deformed or damaged during the operation of the module. Under the influence of factors such as electrolyte flow and gas generation, the appropriate thickness of the cathode plate 41 can ensure the integrity of the cathode plate structure and maintain its normal working state.

[0075] Optionally, in some embodiments, the thickness of the cathode sheet 41 is 0.8 mm. The relatively thin cathode sheet 41 results in a relatively short electron conduction path, allowing electrons to conduct more quickly and smoothly within the cathode sheet 41. This reduces energy loss during conduction, improves the conductivity of the entire electrochemical system, and thus helps to increase the electron transfer rate in the hydrogen peroxide synthesis reaction, promoting the reaction. Secondly, since the conductive inert metal material used in the cathode sheet 41 is relatively expensive, the amount of material required for a thinner cathode sheet 41 is relatively small, thereby reducing material costs.

[0076] Optionally, in some embodiments, the thickness of the cathode sheet 41 is 1.2 mm. The relatively thick cathode sheet 41 has higher mechanical strength and rigidity, and can better resist external physical forces, such as the impact force generated by the flow of electrolyte and the pressure during the module assembly process. During the long-term operation of the module, it can maintain the integrity of its structure and is not easy to deform or be damaged, thereby ensuring the stability and reliability of the cathode sheet 41 and extending its service life.

[0077] Furthermore, a hydrophobic and permeable catalytic layer is provided at the bottom of the cathode sheet 41, which can significantly improve the rate and efficiency of the electrochemical reaction. Secondly, the hydrophobic and permeable catalytic layer can effectively transport gas through its hydrophobic and permeable properties, optimize the gas distribution on the cathode catalytic layer, ensure that the reaction gas can uniformly contact the active material in the cathode catalytic layer, and prevent the cathode catalytic layer from being submerged and failing by preventing electrolyte wetting.

[0078] Furthermore, the anode plate 51 employs a metal-coated substrate, which not only provides excellent electrical conductivity but also stable structural support. The metal-coated substrate exhibits high corrosion resistance and wear resistance, enabling it to maintain stable performance in harsh electrochemical environments. Specifically, the anode plate 51 uses a platinum-plated, iridium-tantalum-plated, or tin-antimony-plated titanium substrate.

[0079] Furthermore, the cathode plate 41 is made of a conductive inert metal material, which is not easily chemically changed during electrochemical reactions, thus maintaining long-term stability and durability. Specifically, the cathode plate 41 is made of materials such as aluminum, titanium, stainless steel, nickel, and platinum-titanium.

[0080] Furthermore, the hydrophobic and breathable catalyst layer is a nano-carbon-based catalyst, such as BN-doped mesoporous carbon, carbon nanotubes, carbon black, etc., which are highly selective two-electron catalysts.

[0081] like Figures 1 to 8 The hydrogen peroxide generator shown includes the hydrogen peroxide module based on the critical surface electrochemical reaction as described above;

[0082] Specifically, by setting up a hydrogen peroxide module based on the critical surface electrochemical reaction as described above in a hydrogen peroxide generator, high-concentration hydrogen peroxide can be directly generated without complex post-processing. At the same time, it is beneficial to improve reaction efficiency and achieve precise control of reaction conditions, which helps to reduce costs and effectively improve product quality.

[0083] The implementation method of Example 1 is as follows:

[0084] The hydrogen peroxide module based on critical surface electrochemical reaction includes a module housing 1. The module housing 1 has a liquid cavity 2 for containing electrolyte, a top opening 3 communicating with the liquid cavity 2, a cathode assembly 4 located on the side of the liquid cavity 2 near the top opening 3, and an anode assembly 5 located on the side of the liquid cavity 2 away from the top opening 3. The side of the cathode assembly 4 facing the top opening 3 is in contact with air to form a gas-solid critical surface 401, and the side away from the top opening 3 is in contact with the electrolyte to form a solid-liquid critical surface 402.

[0085] This invention, by setting up a cathode assembly, forms a gas-solid critical surface with the side of the cathode assembly facing the top opening in contact with air. This allows the cathode reaction to utilize oxygen from the air, rather than solely relying on dissolved oxygen in the electrolyte. Compared to traditional processes that are limited by dissolved oxygen in water, this provides a sufficient and continuous oxygen source for the cathode reaction. Meanwhile, the side of the cathode assembly facing away from the top opening forms a solid-liquid critical surface with the electrolyte, allowing the reaction to proceed continuously. This improves the efficiency and equilibrium concentration of the electrochemically synthesized products, effectively solving the problem in existing hydrogen peroxide preparation processes where the cathode reaction depends on the consumption of dissolved oxygen. However, due to the upper limit of dissolved oxygen content in water, the efficiency of electrochemically synthesized products is difficult to improve, and the equilibrium concentration of the products is also limited.

[0086] The implementation method of Example 2 is as follows:

[0087] Based on Embodiment 1, Embodiment 2 further includes the following implementation: the cathode assembly 4 includes a cathode plate 41 and a cathode support 42 for mounting the cathode plate 41; the anode assembly 5 includes an anode plate 51 and an anode support 52 for mounting the anode plate 51 and detachably connected to the cathode support 42; and the module housing 1 includes a first housing 11 and a second housing 12 detachably connected to the first housing 11 and the cathode support 42 respectively.

[0088] The implementation method of Example 3 is as follows:

[0089] Based on Example 2, Example 3 also has the following implementation: the top opening 3 is located on the second housing 12, the cathode support 42 is provided with a cathode support opening 420 communicating with the top opening 3, the cathode plate 41 is connected to the top opening 3 through the cathode support opening 420, the anode support 52 is provided with an anode support opening 520, and the anode plate 51 is connected to the liquid inner cavity 2 through the anode support opening 520.

[0090] The implementation method of Example 4 is as follows:

[0091] Based on Example 1, Example 4 also has the following implementation method: multiple sets of cathode components 4 are arranged at intervals, and the anode components 5 and the top opening 3 are both arranged corresponding to the cathode components 4.

[0092] The implementation method of Example 5 is as follows:

[0093] Based on Embodiment 3, Embodiment 5 further includes the following implementation: The second housing 12 is provided with a cathode limit groove 121 for fixing the cathode support 42. The cathode support 42 includes an upper cathode support 421 detachably connected to the second housing 12 and a lower cathode support 422 detachably connected to the upper cathode support 421. A cathode mounting cavity 423 for mounting the cathode plate 41 is provided between the upper cathode support 421 and the lower cathode support 422. The first housing 11 is provided with an anode limit support 111 for fixing the anode support 52. The anode support 52 includes an upper anode support 521 detachably connected to the lower cathode support 422 and a lower anode support 522 detachably connected to the upper anode support 521. An anode mounting cavity 523 for mounting the anode plate 51 is provided between the upper anode support 521 and the lower anode support 522.

[0094] The implementation method of Example 6 is as follows:

[0095] Based on Embodiment 5, Embodiment 6 further includes the following implementation: The second housing 12 is provided with a cathode electrode current collector 122 and an anode electrode current collector 123. The upper cathode support 421 is provided with a wire outlet hole 4211. The cathode plate 41 extends to one end to form a cathode terminal 411, and the anode plate 51 extends to one end to form an anode terminal 511. A cathode wire outlet protrusion 61 for accommodating the cathode terminal 411 is provided between the upper cathode support 421 and the lower cathode support 422. The cathode terminal 411 is connected to the cathode electrode current collector 122 through the wire outlet hole 4211. An anode wire outlet protrusion 62 for accommodating the anode terminal 511 and offset from the cathode wire outlet protrusion 61 is provided between the upper anode support 521 and the lower anode support 522. The anode terminal 511 is connected to the anode electrode current collector 123 through the wire outlet hole 4211.

[0096] The implementation method of Example 7 is as follows:

[0097] Based on Example 2, Example 7 further includes the following implementation: A water inlet 112 for connecting the liquid inner cavity 2 and the external water pump is provided on one side of the first housing 11, and a buffer baffle 113 is located on the side of the liquid inner cavity 2 near the water inlet 112. The buffer baffle 113 is a flat buffer baffle, including a first baffle arranged parallel to the inner wall of the first housing 11, a second baffle and a third baffle arranged symmetrically. The second baffle and the third baffle are both perpendicularly connected to the first baffle, and both the second baffle and the third baffle are provided with a water outlet for connecting the liquid inner cavity 2.

[0098] The implementation method of Example 8 is as follows:

[0099] Based on Embodiment 7, Embodiment 8 also has the following implementation method: A guide plate 114 for connecting the liquid inner cavity 2 and the outside is provided on the side of the first housing 11 away from the water inlet 112. The guide plate 114 is inclined from the liquid inner cavity 2 to the outside. The horizontal position of the guide plate 114 near the liquid inner cavity 2 is higher than the horizontal position of the bottom of the cathode plate 41 and lower than the horizontal position of the surface of the cathode plate 41.

[0100] The implementation method of Example 9 is as follows:

[0101] Based on Example 2, Example 9 also has the following implementation method: the cathode sheet 41 has a thickness of 0.8 mm and is made of conductive inert metal material, the anode sheet 51 is made of metal coated substrate, and a hydrophobic and breathable catalytic layer is provided at the bottom of the cathode sheet 41.

[0102] The cathode plate 41 has a thickness of 0.8 mm. The relatively thin cathode plate 41 results in a relatively short electron conduction path, allowing electrons to conduct more quickly and smoothly within the cathode plate 41. This reduces energy loss during conduction and improves the conductivity of the entire electrochemical system, which in turn helps to increase the electron transfer rate in the hydrogen peroxide synthesis reaction and promotes the reaction. Secondly, since the conductive inert metal material used in the cathode plate 41 is relatively expensive, the thinner cathode plate 41 requires a relatively smaller amount of material, thereby reducing material costs.

[0103] The implementation method of Example 10 is as follows:

[0104] Example 10, based on Example 1, also includes the following implementation: a hydrogen peroxide generator, comprising a hydrogen peroxide module based on critical surface electrochemical reaction as described above.

[0105] By installing the above-mentioned hydrogen peroxide module based on critical surface electrochemical reaction in the hydrogen peroxide generator, high-concentration hydrogen peroxide can be generated directly without complex post-processing. At the same time, it is beneficial to improve reaction efficiency and achieve precise control of reaction conditions, which helps to reduce costs and effectively improve product quality.

[0106] The implementation method of Example 11 is as follows:

[0107] The difference between Example 11 and Example 7 is that the buffer baffle 113 is an arc-shaped buffer baffle. The arc-shaped structure allows the water to flow smoothly along the arc-shaped surface. While changing the direction of the water flow, it reduces the energy loss of the water flow and the generation of turbulence. The arc-shaped buffer baffle is also provided with outlets that connect to the liquid cavity 2 on both sides near the inlet 112.

[0108] The implementation method of Example Twelve is as follows:

[0109] The difference between Example 12 and Example 7 is that the buffer baffle 113 is a folded plate type buffer baffle. The baffle is in the shape of a folded line and is composed of multiple straight plate segments connected together. When the water flow impacts the folded plate type buffer baffle, the water flow will change direction multiple times at different angles of the folded plate, thereby consuming more kinetic energy and achieving a better buffering effect. The folded plate type buffer baffle is also provided with outlets that connect to the liquid inner cavity 2 on both sides near the water inlet 112.

[0110] The implementation method of Example Thirteen is as follows:

[0111] The difference between Example 13 and Example 7 is that the buffer baffle 113 is a spiral flow guide type buffer baffle, and the surface of the baffle is set as a spiral flow guide groove. The water flows along the spiral path to the liquid inner cavity 2, thereby consuming more kinetic energy and achieving a better buffering effect.

[0112] The implementation method of Example Fourteen is as follows:

[0113] The difference between Example 14 and Example 9 is that the thickness of the cathode sheet 41 is 1.2mm. The relatively thick cathode sheet 41 has higher mechanical strength and rigidity, and can better resist external physical forces, such as the impact force generated by the flow of electrolyte and the pressure during the module assembly process. During the long-term operation of the module, it can maintain the integrity of its structure and is not easy to deform or be damaged, thereby ensuring the stability and reliability of the cathode sheet 41 and extending its service life.

[0114] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A hydrogen peroxide module based on an interfacial electrochemical reaction, comprising a module housing (1), characterized in that: The module housing (1) is provided with a liquid cavity (2) for containing electrolyte, a top opening (3) communicating with the liquid cavity (2), a cathode assembly (4) located on the side of the liquid cavity (2) near the top opening (3), and an anode assembly (5) located on the side of the liquid cavity (2) away from the top opening (3). The side of the cathode assembly (4) facing the top opening (3) is in contact with air to form a gas-solid critical surface (401), and the side facing away from the top opening (3) is in contact with the electrolyte to form a solid-liquid critical surface (402).

2. The critical surface area electrochemical reaction based hydrogen peroxide module of claim 1, wherein: The cathode assembly (4) includes a cathode plate (41) and a cathode support (42) for mounting the cathode plate (41). The anode assembly (5) includes an anode plate (51) and an anode support (52) for mounting the anode plate (51) and detachably connected to the cathode support (42). The module housing (1) includes a first housing (11) and a second housing (12) detachably connected to the first housing (11) and the cathode support (42) respectively.

3. The critical surface area based electrochemical reaction of hydrogen peroxide module according to claim 2, wherein: The top opening (3) is located on the second housing (12). The cathode support (42) is provided with a cathode support opening (420) that communicates with the top opening (3). The cathode plate (41) communicates with the top opening (3) through the cathode support opening (420). The anode support (52) is provided with an anode support opening (520). The anode plate (51) communicates with the liquid cavity (2) through the anode support opening (520).

4. The critical surface area electrochemical reaction based hydrogen peroxide module of claim 1, wherein: The cathode assembly (4) is provided in multiple sets and arranged at intervals, and the anode assembly (5) and the top opening (3) are both arranged corresponding to the cathode assembly (4).

5. The critical surface area based electrochemical reaction of hydrogen peroxide module according to claim 3, wherein: The second housing (12) is provided with a cathode limit groove (121) for fixing the cathode support (42). The cathode support (42) includes an upper cathode support (421) detachably connected to the second housing (12) and a lower cathode support (422) detachably connected to the upper cathode support (421). A cathode mounting cavity (423) for installing the cathode plate (41) is provided between the upper cathode support (421) and the lower cathode support (422). The first housing (11) is provided with an anode limit support (111) for fixing the anode support (52). The anode support (52) includes an upper anode support (521) detachably connected to the lower cathode support (422) and a lower anode support (522) detachably connected to the upper anode support (521). An anode mounting cavity (523) for installing the anode plate (51) is provided between the upper anode support (521) and the lower anode support (522).

6. The critical surface area based electrochemical reaction of hydrogen peroxide module according to claim 5, wherein: The second housing (12) is provided with a cathode electrode current collector (122) and an anode electrode current collector (123). The upper cathode support (421) is provided with a wire outlet hole (4211). The cathode plate (41) extends to one end to form a cathode terminal (411), and the anode plate (51) extends to one end to form an anode terminal (511). A cathode outlet is provided between the upper cathode support (421) and the lower cathode support (422) for accommodating the cathode terminal (411). The cathode terminal (411) is connected to the cathode electrode current collector (122) through the outlet hole (4211). An anode outlet protrusion (62) is provided between the upper anode support (521) and the lower anode support (522) for accommodating the anode terminal (511) and is offset from the cathode outlet protrusion (61). The anode terminal (511) is connected to the anode electrode current collector (123) through the outlet hole (4211).

7. The critical surface area based electrochemical reaction of hydrogen peroxide module according to claim 2, wherein: The first housing (11) has an inlet (112) for connecting the liquid cavity (2) and the external water pump on one side, and a buffer baffle (113) located on the side of the liquid cavity (2) near the inlet (112).

8. The critical surface area based electrochemical reaction of hydrogen peroxide module according to claim 7, wherein: The first housing (11) is provided with a guide plate (114) on the side away from the water inlet (112) for connecting the liquid inner cavity (2) and the outside. The guide plate (114) is inclined from the liquid inner cavity (2) to the outside. The horizontal position of the guide plate (114) near the liquid inner cavity (2) is higher than the horizontal position of the bottom of the cathode plate (41) and lower than the horizontal position of the surface of the cathode plate (41).

9. The critical surface area based electrochemical reaction of hydrogen peroxide module according to claim 2, wherein: The cathode sheet (41) has a thickness of 0.8-1.2 mm and is made of conductive inert metal material. The anode sheet (51) is made of metal-coated substrate. The bottom of the cathode sheet (41) is provided with a hydrophobic and breathable catalytic layer.

10. A hydrogen peroxide generating machine characterized by: Includes the hydrogen peroxide module based on critical surface electrochemical reaction as described in any one of claims 1-9.

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