Device for electrochemically generating hydrogen peroxide

Abstract

The invention provides a device for electrochemically producing hydrogen peroxide. The device comprises an electrochemical hydrogen peroxide production anode; electrochemically preparing a hydrogen peroxide cathode; the electrolyte layer is arranged between the electrochemical hydrogen peroxide preparation anode and the electrochemical hydrogen peroxide preparation cathode, and the electrolyte layer is tightly attached to the electrochemical hydrogen peroxide preparation anode and the electrochemical hydrogen peroxide preparation cathode; and a refrigeration device. According to the device for electrochemically generating hydrogen peroxide, the water absorption material base material is modified, the electrolyte is loaded to prepare the electrolyte layer, and the electrolyte layer is placed between the electrolytic cathode and the electrolytic anode of the hydrogen peroxide generating device, so that water can be absorbed and stored, and a circuit between the cathode electrode and the anode electrode is conducted; water is electrolyzed to generate hydrogen peroxide, and the hydrogen peroxide is released into air to play a role in sterilization and disinfection. The structure that the electrolyte layer, the anode electrode and the cathode electrode are tightly attached enables the internal resistance between the anode electrode and the cathode electrode to be reduced, and the production efficiency of hydrogen peroxide is higher.

Description

Technical Field

[0001] The present invention relates to the field of electrochemical technology, and particularly to a device for electrochemically generating hydrogen peroxide. Background Art

[0002] As an efficient, harmless and residue-free oxidant, hydrogen peroxide solution is widely used in the sterilization and disinfection of water bodies and the treatment of organic pollutants. In existing industries, the production of hydrogen peroxide requires large-scale, energy-intensive and cumbersome preparation processes, and the transportation and storage facilities have additional equipment costs and potential safety hazards.

[0003] In the prior art, in order to eliminate the costs and risks of storing and transporting hydrogen peroxide, an on-site production device for hydrogen peroxide has been proposed. Usually, an anode electrode and a cathode electrode are arranged in a reaction tank, and the electrolyte in the reaction tank is electrolyzed by energizing the anode electrode and the cathode electrode, thereby generating hydrogen peroxide. However, the above method requires manual addition of the electrolyte, which is cumbersome to operate and inconvenient to use. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the hydrogen peroxide production device in the prior art requires manual addition of the electrolyte, so as to provide a device for electrochemically generating hydrogen peroxide and a production method of hydrogen peroxide.

[0005] To solve the above technical problem, the present invention provides a device for electrochemically generating hydrogen peroxide, including:

[0006] An anode for electrochemically producing hydrogen peroxide;

[0007] A cathode for electrochemically producing hydrogen peroxide;

[0008] An electrolyte layer, which is arranged between the anode for electrochemically producing hydrogen peroxide and the cathode for electrochemically producing hydrogen peroxide, and the electrolyte layer is in close contact with the anode for electrochemically producing hydrogen peroxide and the cathode for electrochemically producing hydrogen peroxide; the electrolyte layer includes a water-absorbing material substrate, and the water-absorbing material substrate is loaded with an electrolyte;

[0009] A refrigeration device for condensing the water in the air and aggregating it on the electrolyte layer.

[0010] Optionally, the anode for electrochemically producing hydrogen peroxide and the cathode for electrochemically producing hydrogen peroxide are connected to a first power source for power supply.

[0011] Optionally, the water-absorbing material substrate includes at least one of cotton cloth and fiber paper.

[0012] Optionally, the electrolyte includes at least one of sulfuric acid, sodium hydroxide, calcium carbonate, and sodium sulfate.

[0013] Optionally, during the operation of the device for electrochemically generating hydrogen peroxide, after water accumulates in the electrolyte layer, the electrolyte concentration in the electrolyte layer is 0.01 to 0.1 mol / L.

[0014] The specific concentration of the electrolyte depends on the concentration of hydrogen peroxide planned to be prepared and the type of the electrolyte.

[0015] Optionally, the thickness of the electrolyte layer is 0.5 to 5 mm.

[0016] The thickness of the electrolyte layer depends on the specifications of the hydrogen peroxide production device and the concentration of hydrogen peroxide planned to be prepared. Generally speaking, the higher the concentration of hydrogen peroxide to be prepared, the greater the mass fraction of the electrolyte, and the thicker the electrolyte layer.

[0017] Optionally, the electrolyte layer is made by the following method:

[0018] Immerse the water-absorbing material substrate in a solution containing the electrolyte to load the electrolyte on the water-absorbing material substrate, and then dry the water-absorbing material substrate to obtain the electrolyte layer.

[0019] Optionally, the refrigeration device is a thermoelectric cooler;

[0020] Optionally, the refrigeration device is connected to a second power source for power supply.

[0021] The thermoelectric cooler is installed on the side of the anode for electrochemically producing hydrogen peroxide away from the electrolyte layer.

[0022] Optionally, it further includes a fan, and the fan is used to send out the hydrogen peroxide generated on the cathode for electrochemically producing hydrogen peroxide.

[0023] Optionally, the anode for electrochemically producing hydrogen peroxide is an electrode made of an alloy of one or more of platinum, palladium, ruthenium, rhodium, iridium, osmium, and gold, a boron-doped diamond thin film, or a glassy carbon electrode.

[0024] Optionally, the cathode for electrochemically producing hydrogen peroxide is made of a porous electrode material;

[0025] Optionally, the cathode for electrochemically producing hydrogen peroxide is at least one of a nickel foam plate, a porous graphite plate, a sintered titanium plate, an activated carbon felt, and a carbon paper.

[0026] The technical solution of the present invention has the following advantages:

[0027] 1. The device for electrochemically generating hydrogen peroxide provided by the present invention modifies the water-absorbing material substrate, loads an electrolyte to prepare an electrolyte layer, places it between the cathode and anode of the hydrogen peroxide generating device, can inhale and store moisture, enables the circuit between the cathode electrode and the anode electrode to conduct, electrolyzes the moisture to generate hydrogen peroxide, and releases it into the air to play a role in sterilization and disinfection. The structure in which the electrolyte layer, the anode electrode, and the cathode electrode are closely attached reduces the internal resistance between the anode electrode and the cathode electrode, and only a small amount of liquid is required to generate a large electrolysis current, making the hydrogen peroxide generation efficiency higher. The device for electrochemically generating hydrogen peroxide provided by the present invention cools between the anode electrode and the cathode electrode through a refrigeration device, reduces the temperature between the anode electrode and the cathode electrode, and can directly adsorb moisture from the air to produce hydrogen peroxide, solving the problem that the existing hydrogen peroxide production device requires manual addition of electrolyte.

[0028] 2. The device for electrochemically generating hydrogen peroxide provided by the present invention can prepare the electrolyte layer by loading electrolytes with corresponding concentrations according to the target current of the hydrogen peroxide generating device, without obvious crystallization precipitation, and the electrolyte will not be lost after adding water.

[0029] 3. The cathode electrode of the device for electrochemically generating hydrogen peroxide provided by the present invention uses a porous conductive material, which can not only meet the conductive requirements of the cathode electrode, but also enable the liquid condensed on the cathode electrode to penetrate downward to the water-absorbing material, providing raw materials for electrolytic generation of hydrogen peroxide, and the generated hydrogen peroxide can diffuse into the air through the porous cathode electrode. By blowing air on the side of the cathode electrode far from the anode electrode through a fan, the electrolytically generated hydrogen peroxide is carried into the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic diagram of the device for electrochemically generating hydrogen peroxide provided in Embodiment 1 of the present invention.

[0032] Description of the reference numerals:

[0033] 1. Anode electrode; 2. Cathode electrode; 3. Electrolyte layer; 4. Semiconductor refrigeration chip; 5. Fan; 6. First power supply; 7. Second power supply. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. 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 protection scope of the present invention.

[0035] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" 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 mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. 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.

[0037] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] This embodiment provides an electrochemical hydrogen peroxide generation device capable of directly producing hydrogen peroxide from the air for producing hydrogen peroxide for sterilization and disinfection.

[0039] As Figure 1 shown, a specific implementation manner of an electrochemical hydrogen peroxide generation device provided by this embodiment includes: a cathode electrode 2, an anode electrode 1, and an electrolyte layer 3; the electrolyte layer 3 is disposed between the anode electrode 1 and the cathode electrode 2, and the electrolyte layer 3 is in close contact with the anode electrode 1 and the cathode electrode 2. The cathode electrode 2 and the anode electrode 1 are powered by a first power source 6.

[0040] The electrolyte layer includes a water-absorbing material substrate loaded with an electrolyte; a refrigeration device for condensing water in the air and aggregating it on the electrolyte layer. The water-absorbing material substrate includes at least one of cotton cloth and fiber paper. The electrolyte contains at least one of sulfuric acid, sodium hydroxide, calcium carbonate, and sodium sulfate.

[0041] During the operation of the device for electrochemically generating hydrogen peroxide, after water accumulates in the electrolyte layer, the electrolyte concentration in the electrolyte layer is 0.01 - 0.1 mol / L. The specific concentration of the electrolyte depends on the concentration of hydrogen peroxide planned to be prepared and the type of electrolyte.

[0042] The thickness of the electrolyte layer is 0.5 - 5 mm. The thickness of the electrolyte layer depends on the specifications of the hydrogen peroxide production device and the concentration of hydrogen peroxide planned to be prepared. Generally speaking, the higher the concentration of hydrogen peroxide to be prepared, the greater the mass fraction of the electrolyte, and the thicker the electrolyte layer.

[0043] The electrolyte layer is made by the following method: impregnating the water-absorbing material substrate in a solution containing an electrolyte to load the electrolyte on the water-absorbing material substrate, and drying the water-absorbing material substrate to obtain the electrolyte layer.

[0044] The electrolyte layer can be prepared by loading an electrolyte with a corresponding concentration according to the target current of the hydrogen peroxide production device. The concentration of the loaded electrolyte determines the maximum current during the electrolysis of the hydrogen peroxide production device. There is no obvious crystallization precipitation in the electrolyte layer, and the electrolyte will not be lost after adding water. For example: when the target current of the hydrogen peroxide production device is 1 A, using cotton cloth as the substrate, loading a 0.05 mol / L sodium sulfate solution, and after curing, placing it between the electrolytic cathode and the electrolytic anode of the hydrogen peroxide production device. When there is no condensed water, the current is zero. As the condensed water continuously increases, the current continuously rises, and the maximum current can reach 1 A.

[0045] In the device for electrochemically generating hydrogen peroxide provided in this embodiment, it further includes: a refrigeration device that cools towards the space between the anode electrode 1 and the cathode electrode 2 to lower the temperature between the anode electrode 1 and the cathode electrode 2 so that moisture in the air condenses. By cooling towards the space between the anode electrode 1 and the cathode electrode 2 through the refrigeration device, the temperature between the anode electrode 1 and the cathode electrode 2 is lowered to condense liquid, providing raw materials for the electrolysis to generate hydrogen peroxide.

[0046] In this embodiment, the refrigeration device is a thermoelectric cooler 4. After the thermoelectric cooler 4 is powered on, the temperature of its cold end decreases. The cold end of the thermoelectric cooler 4 is abutted against the side of the anode electrode 1 away from the cathode electrode 2. Through the heat conduction between the thermoelectric cooler 4 and the anode electrode 1, the temperature of the anode electrode 1 decreases. Through the heat transfer characteristics of the anode electrode 1, the cold quantity can be transferred towards the cathode electrode 2, so that the temperatures of the cathode electrode 2 and the electrolyte layer 3 decrease, condensing moisture and providing raw materials for the electrolytic production of hydrogen peroxide. Specifically, the thermoelectric cooler 4 is electrically connected to a second power source 7. Additionally, as an alternative embodiment, the thermoelectric cooler 4 can also be replaced with a heat exchanger with a refrigeration medium, or other refrigeration methods capable of exchanging heat with the anode electrode 1.

[0047] During use, the electrolyte layer 3 inhales and stores the liquid, enabling the circuit between the cathode electrode 2 and the anode electrode 1 to conduct electricity, electrolyzing water to produce hydrogen peroxide, and releasing it into the air to play a sterilization and disinfection role. The closely adhered structure of the electrolyte layer 3, the anode electrode 1, and the cathode electrode 2 reduces the internal resistance between the anode electrode 1 and the cathode electrode 2, and only a small amount of liquid is required to generate a large electrolytic current, making the hydrogen peroxide production efficiency higher. The device for electrochemically producing hydrogen peroxide provided in this embodiment can directly adsorb moisture from the air to produce hydrogen peroxide, which is more efficient than electrolyzing humid air in the gas phase, and solves the problem in the prior art that the hydrogen peroxide production device requires manual addition of electrolyte.

[0048] As Figure 1 shown, in the device for electrochemically producing hydrogen peroxide provided in this embodiment, the anode electrode 1 is made of a heat-conducting and electrically conductive material. The anode electrode 1 made of a heat-conducting and electrically conductive material can conduct temperature. Specifically, the anode electrode 1 can be made of an alloy of one or more of platinum, palladium, ruthenium, rhodium, iridium, osmium, and gold, or the anode electrode 1 can be made of a boron-doped diamond film, or the anode electrode 1 can be made of a glassy carbon electrode, which can meet the requirements of the anode electrode 1 for electrical conductivity and heat conduction, and can prevent the condensed liquid from leaking from the anode electrode 1.

[0049] As Figure 1 shown, in the device for electrochemically producing hydrogen peroxide provided in this embodiment, the cathode electrode 2 is made of a porous conductive material. The cathode electrode 2 made of a porous conductive material can meet the electrical conductivity requirements of the cathode electrode 2 while also allowing the liquid condensed on the cathode electrode 2 to penetrate downward to the water-absorbing material, providing raw materials for the electrolytic production of hydrogen peroxide, and the generated hydrogen peroxide can diffuse into the air through the porous cathode electrode 2. Specifically, the cathode electrode 2 is a nickel foam plate, a porous graphite plate, a sintered titanium plate, an activated carbon felt, or a carbon paper.

[0050] As Figure 1 shown, in the device for electrochemically generating hydrogen peroxide provided in this embodiment, a fan 5 is disposed on the side of the cathode electrode 2 away from the anode electrode 1. By blowing air on the side of the cathode electrode 2 away from the anode electrode 1 through the fan 5, the electrolytically generated hydrogen peroxide is carried into the air. Additionally, as an alternative embodiment, the fan 5 may also be disposed at other positions where air can blow through the side of the cathode electrode 2 away from the anode electrode 1.

[0051] As Figure 1 shown, in the device for electrochemically generating hydrogen peroxide provided in this embodiment, the cathode electrode 2 and the anode electrode 1 are plate-shaped materials disposed horizontally. The use of horizontally disposed plate-shaped materials for the cathode electrode 2 and the anode electrode 1 is conducive to storing liquid in the electrolyte layer 3 and can prevent liquid leakage. Additionally, as an alternative embodiment, the cathode electrode 2 may also be in other structures such as a grid shape or a mesh shape.

[0052] As Figure 1 shown, in the device for electrochemically generating hydrogen peroxide provided in this embodiment, the electrolyte layer 3 is made of a porous water-retaining material and has a plate-shaped structure. Using a porous water-retaining material to make the electrolyte layer 3 is conducive to adsorbing and storing liquid. The electrolyte layer 3 being set as a plate-shaped structure can closely fit with the anode electrode 1 and the cathode electrode 2, which is conducive to reducing the internal resistance between the anode electrode 1 and the cathode electrode 2. It can also enable the cold generated at the cold end of the semiconductor refrigeration sheet 4 to be conducted through temperature to lower the temperatures of the anode electrode 1, the electrolyte layer 3, and the cathode electrode 2. Specifically, the electrolyte layer 3 is made of water-absorbable materials such as fiber paper and cotton cloth, which are insulating before water absorption and conductive after water absorption; an appropriate amount of electrolyte can be added to the electrolyte layer 3, which is conducive to reducing resistance and improving the conductivity of the electrolyte layer 3. Only a small amount of liquid is required to generate a large electrolytic current, making the hydrogen peroxide production efficiency higher.

[0053] The first power supply 6 and the second power supply 7 are turned on, and the semiconductor refrigeration sheet 4 operates. The cold end of the semiconductor cools the electrolytic anode 1, the porous water-absorbing material 3, and the electrolytic cathode 2 through temperature conduction, condensing the moisture in the air. The moisture seeps down from the electrolytic cathode 2, and the porous water-absorbing material 3 conducts the electrolytic circuit after absorbing water, starting to electrolyze water to generate hydrogen peroxide to form hydrogen peroxide solution. The hydrogen peroxide solution is led to the upper surface through the electrolytic cathode 2, and the hydrogen peroxide is carried into the air by blowing air through the fan 5.

[0054] The close-fitting structure enables the cold end of the semiconductor to reduce the temperatures of the electrolytic anode 1, the porous water-absorbing material 3, and the electrolytic cathode 2 through heat conduction. The surface temperature of the electrolytic cathode 2 is maintained above zero degrees Celsius and will not frost. Therefore, there is no need to disconnect the condensation for defrosting, and the moisture in the air can be continuously condensed to electrolyze and produce hydrogen peroxide.

[0055] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. An apparatus for electrochemically generating hydrogen peroxide, characterized in that, it comprises: an anode for electrochemically producing hydrogen peroxide; a cathode for electrochemically producing hydrogen peroxide; an electrolyte layer, which is arranged between the anode for electrochemically producing hydrogen peroxide and the cathode for electrochemically producing hydrogen peroxide, and the electrolyte layer is in close contact with the anode for electrochemically producing hydrogen peroxide and the cathode for electrochemically producing hydrogen peroxide; the electrolyte layer comprises a water-absorbing material substrate, and the water-absorbing material substrate is loaded with an electrolyte; a refrigeration device for condensing water in the air and aggregating it on the electrolyte layer.

2. The apparatus for electrochemically generating hydrogen peroxide according to claim 1, characterized in that, the water-absorbing material substrate comprises at least one of cotton cloth and fiber paper.

3. The apparatus for electrochemically generating hydrogen peroxide according to claim 1, characterized in that, the electrolyte comprises at least one of sulfuric acid, sodium hydroxide, calcium carbonate, and sodium sulfate.

4. The apparatus for electrochemically generating hydrogen peroxide according to claim 1, characterized in that, during the working process of the apparatus for electrochemically generating hydrogen peroxide, after water aggregates on the electrolyte layer, the concentration of the electrolyte in the electrolyte layer is 0.01 - 0.1 mol / L.

5. The apparatus for electrochemically generating hydrogen peroxide according to claim 1, characterized in that, the thickness of the electrolyte layer is 0.5 - 5 mm.

6. The apparatus for electrochemically generating hydrogen peroxide according to claim 1, characterized in that, the electrolyte layer is made by the following method: immersing the water-absorbing material substrate in a solution containing an electrolyte to load the electrolyte on the water-absorbing material substrate, and then drying the water-absorbing material substrate to obtain the electrolyte layer.

7. The apparatus for electrochemically generating hydrogen peroxide according to claim 1, characterized in that, the refrigeration device is a thermoelectric cooler; the thermoelectric cooler is installed on one side of the anode for electrochemically producing hydrogen peroxide away from the electrolyte layer.

8. The apparatus for electrochemically generating hydrogen peroxide according to claim 1, characterized in that, it comprises a fan for sending out the hydrogen peroxide generated on the cathode for electrochemically producing hydrogen peroxide.

9. The apparatus for electrochemically generating hydrogen peroxide according to claim 1, characterized in that, the anode for electrochemically producing hydrogen peroxide is an electrode made of an alloy of one or more of platinum, palladium, ruthenium, rhodium, iridium, osmium, and gold, a boron-doped diamond thin film, or a glassy carbon electrode.

10. The apparatus for electrochemically generating hydrogen peroxide according to claim 1, characterized in that, the cathode for electrochemically producing hydrogen peroxide is made of a porous electrode material; preferably, the cathode for electrochemically producing hydrogen peroxide is at least one of a nickel foam plate, a porous graphite plate, a sintered titanium plate, an activated carbon felt, and a carbon paper.

Images