CN117758287A - Electrochemical device for preparing nitrogen and oxygen by solid polymer membrane electrolysis - Google Patents
Electrochemical device for preparing nitrogen and oxygen by solid polymer membrane electrolysis Download PDFInfo
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- CN117758287A CN117758287A CN202311808421.2A CN202311808421A CN117758287A CN 117758287 A CN117758287 A CN 117758287A CN 202311808421 A CN202311808421 A CN 202311808421A CN 117758287 A CN117758287 A CN 117758287A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 40
- 239000001301 oxygen Substances 0.000 title claims abstract description 40
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 40
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 32
- 239000007787 solid Substances 0.000 title claims abstract description 27
- 229920005597 polymer membrane Polymers 0.000 title claims abstract description 23
- 239000012528 membrane Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000003197 catalytic effect Effects 0.000 claims description 13
- 238000009792 diffusion process Methods 0.000 claims description 13
- 239000003054 catalyst Substances 0.000 claims description 10
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 239000003011 anion exchange membrane Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical compound OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 229920006254 polymer film Polymers 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229920001973 fluoroelastomer Polymers 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- HTXDPTMKBJXEOW-UHFFFAOYSA-N iridium(IV) oxide Inorganic materials O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910000510 noble metal Inorganic materials 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 3
- 238000010345 tape casting Methods 0.000 claims description 3
- 238000010023 transfer printing Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000004945 silicone rubber Substances 0.000 claims description 2
- 150000001450 anions Chemical class 0.000 claims 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000446 fuel Substances 0.000 abstract description 6
- 239000001257 hydrogen Substances 0.000 abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 6
- 238000009776 industrial production Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 abstract description 2
- 239000003792 electrolyte Substances 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000011244 liquid electrolyte Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 hydroxyl ions Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012982 microporous membrane Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention provides an electrochemical device for separating nitrogen and oxygen in air based on solid polymer membrane electrolysis, which sequentially comprises the following components: front end plate, conductive plate, anode plate, membrane electrode, cathode plate, conductive plate, back end plate, and insulating gasket for sealing and screw and nut for assembling. The constant voltage in the electrolysis process is controlled below 1.5V, so that the cathode hydrogen can be prevented from being separated out; pure water is introduced into the anode, oxygen is resolved by water and electricity, air is introduced into the cathode, and the oxygen in the cathode is absorbed to obtain nitrogen. If hydrogen is introduced into the anode and air or oxygen is introduced into the cathode, the cathode can be made to be the anode, and the anode can be made to be the cathode to operate as a fuel cell. The device can work at room temperature, is safe and environment-friendly, has high electrolysis efficiency and high gas purity, and is simple to operate. The invention has simple structure and low raw material cost, and can be assembled into a small gas generator or a fuel cell, and also can be assembled into a large nitrogen and oxygen preparation device or a power generation pile for industrial production.
Description
Technical Field
The invention relates to electrochemical electrolysis equipment, in particular to an electrochemical device for preparing nitrogen and oxygen by adopting a solid polymer membrane electrolysis device of a constant potential electrolysis method.
Background
The preparation method of nitrogen mainly comprises molecular sieve air separation nitrogen preparation, cryogenic air separation nitrogen preparation and membrane air separation nitrogen preparation, and the structures of the equipment are generally complex or expensive. The electrolysis method for preparing nitrogen and oxygen is also a feasible method, for example, patent CN1103439A is used for reforming an alkaline electrolytic cell, a microporous membrane is used as a separator of an electrode, the electrolyte is a strong alkaline electrolyte, air is introduced into a cathode, the voltage is controlled to be less than 1.5V, and oxygen and nitrogen are respectively obtained from an anode and the cathode. However, the device needs to use high-concentration potassium hydroxide solution as electrolyte, and the strong alkali solution is in direct contact with gas, so that potential influence on gas quality is brought about, and the possibility of output along with a gas path is provided; in addition, the corrosion resistance requirement on the electrolytic cell is very high, the danger of strong alkali leakage is easy to occur, and the problems of pollution, low efficiency and the like exist.
The ion exchange membrane-based electrolyzer may replace the liquid electrolyte with a polymer electrolyte. Thus, they do not require the circulation of a liquid electrolyte. In addition, solid electrolytes can achieve compact system designs with durable structural properties that can achieve higher operating pressures. High pressure of electrolytic cellOperation has the advantage of delivering pressurized hydrogen to the end user. Proton Exchange Membrane (PEM) water electrolysers may be in the range 1-3A cm -2 Is a pure water electrolysis-based technology developed by general-purpose companies in the united states at the age of 70 of the 20 th century. The cell consists of electrolytic chambers, each cell containing two electrodes and a sheet of proton exchange membrane. After pure water is injected into the electrolytic tank and a certain voltage is applied, hydrogen and oxygen can be produced. The proton exchange membrane has the advantages of good mechanical strength and chemical stability, high proton conductivity, good gas separation property and the like as electrolyte, can lead the proton exchange membrane electrolytic tank to work under higher current without reducing the electrolytic efficiency, and the purity of the generated gas can reach 99.999 percent, thus being considered as the water electrolysis technology with the most development prospect. In addition, the alkaline anion exchange membrane electrolyzer uses an alkaline Anion Exchange Membrane (AEM) for alkaline electrolysis, which can provide the comprehensive advantages of PEM and liquid electrolyte circulation alkaline electrolysis, and comprises (1) the AEM electrolyzer uses a non-platinum catalyst, and (2) pure water or low-concentration alkaline solution can be used as electrolyte instead of concentrated alkaline electrolyte, so that corrosion of the tank body by the electrolyte is avoided, and the method is a water electrolysis technology with high safety.
The invention provides an electrochemical generator which has mild working conditions and simple structure, can prepare pure nitrogen and pure oxygen and can be used in the discharge process of a fuel cell simultaneously, and combines an electrochemical electrolysis nitrogen making device of an alkaline electrolytic cell, an oxygen making device and a solid polymer membrane electrolysis technology. The device has simple structure and low raw material cost, not only can be assembled into a small-sized gas generator or a fuel cell, but also can be assembled into a large-sized nitrogen and oxygen preparation device or a power generation pile for industrial production.
Disclosure of Invention
The invention aims to provide an electrochemical electrolysis device, which adopts a solid polymer membrane electrolysis device adopting a constant potential electrolysis method to prepare nitrogen and oxygen and can be used as a fuel cell. The device comprises the following components in sequence: front end plate, conductive plate, anode plate, membrane electrode, cathode plate, conductive plate, back end plate, and insulating gasket for sealing and screw and nut for assembling. The constant voltage in the electrolysis process is controlled below 1.5V, so that the cathode hydrogen can be prevented from being separated out; pure water is introduced into the anode, oxygen is resolved by water and electricity, air is introduced into the cathode, and the oxygen in the cathode is absorbed to obtain nitrogen. If hydrogen is introduced into the anode and air or oxygen is introduced into the cathode, the cathode can be made to be the anode, and the anode can be made to be the cathode to operate as a fuel cell. Has the advantages of strong safety, simple operation, good performance and the like.
In order to achieve the above object, the technical scheme of the present invention is as follows:
the electrochemical nitrogen and oxygen generating apparatus of claim 1, modified by a solid polymer membrane electrolyzer, comprising in order: front end plate, conductive plate, anode plate, membrane electrode, cathode plate, conductive plate, back end plate, and insulating gasket for sealing and screw and nut for assembling.
The anode plate is provided with a water inlet and a water-oxygen outlet; the negative plate is provided with an air inlet and a nitrogen outlet; the middle of the device is a membrane electrode which consists of a solid polymer membrane, a cathode-anode catalytic layer and a cathode-anode gas diffusion layer and is used for transmitting water vapor and protons generated by water electrolysis; the conducting plate is used for connecting the conducting wires to apply external voltage; the front end plate is provided with a water inlet, a water-oxygen outlet and the rear end plate is provided with an air inlet and a nitrogen outlet; in addition, the end plate is provided with a fastening screw hole, and screw holes are arranged at corresponding positions of the anode plate and the cathode plate, so that the assembly and the fixation of each plate, the sealing gasket and the membrane electrode can be realized.
An anode flow field is arranged on one surface of the anode plate, a cathode flow field is arranged on one surface of the cathode plate, and the anode plate and the cathode plate can be assembled into a bipolar plate through sealing so as to be used for connecting a plurality of electrolytic cells in series; the shape of the polar plate can be, but is not limited to, round or square commonly used for water electrolysis; the material of the polar plate is titanium plate subjected to surface treatment or stainless steel plate plated with tantalum.
The membrane electrode sequentially comprises an anode diffusion layer, an anode catalytic layer, a solid polymer membrane, a cathode catalytic layer and a cathode diffusion layer; the diffusion layer is made of titanium grid/net/felt, carbon paper, stainless steel grid plate and other materials; the catalytic layer is prepared on the solid polymer film by adopting a heating spraying transfer printing method or direct spraying or knife coating; the catalyst adopts Ir, irO2, ruO2 unitary catalyst or IrO2/SnO2, irO2/Sb-SnO2, irO2/TiO2 and other supported or nickel-based, iron-based and molybdenum-based non-noble metal catalysts and the like.
The solid polymer membrane uses a perfluorosulfonic acid membrane or a reinforced perfluorosulfonic acid membrane or an anion exchange membrane.
The insulating gasket is made of fluororubber or silicone rubber, is integrally formed by stamping through a cutting die, and is provided with sealing gasket buffer grooves on the anode plate, the cathode plate and the end plate for giving the sealing gasket a telescopic space after being compressed.
Compared with the prior art, the invention can obtain the following technical effects:
aiming at the problems of gas quality and safety of an alkaline electrolysis nitrogen and oxygen production electrochemical device, the invention adopts solid polymer membrane electrolysis to carry out electrochemical nitrogen and oxygen production. The device can work at room temperature, is safe and environment-friendly, has high electrolysis efficiency, high gas purity, simple operation, simple structure and low raw material price, and can be assembled into a small gas generator or a large nitrogen and oxygen preparation device for industrial production.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic view of an electrochemical device for the electrolytic production of nitrogen and oxygen from the solid polymer membrane in accordance with one embodiment of the present invention, wherein the device is composed of a single pair of electrolytic cells.
FIG. 2 is a schematic view of an electrochemical device membrane electrode for producing nitrogen and oxygen by electrolysis of the solid polymer membrane according to one embodiment of the present invention;
FIG. 3 is a schematic view of an electrochemical apparatus for the electrolytic production of nitrogen and oxygen from the solid polymer membrane according to one embodiment of the present invention, wherein the apparatus is composed of a plurality of pairs of electrolytic cells;
wherein, 1 front end plate, 2 conductive plate, 3 anode plate, 4 membrane electrode, 5 cathode plate, 6 conductive plate, 7 back end plate, 8 solid polymer film, 9 anode catalytic layer, 10 cathode catalytic layer, 11 anode diffusion layer, 12 cathode diffusion layer.
Detailed Description
In order to more clearly illustrate the general inventive concept, a detailed description is given below by way of example with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, the descriptions of the terms "implementation," "embodiment," "one embodiment," "example," or "particular example" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in figure 1, the solid polymer membrane electrochemical nitrogen and oxygen generating device formed by a single pair of electrolytic tanks sequentially comprises a front end plate 1, a conductive plate 2, an anode plate 3, a membrane electrode 4, a cathode plate 5, a conductive plate 6 and a rear end 7 from front to back.
The shapes of the end plate, the conductive plate, the membrane electrode 4 and the polar plate can be, but not limited to, round or square commonly used for water electrolysis, each unit part adopts fluororubber or silicon rubber to realize integral sealing, and finally the device is locked and fixed by a metal screw. The material of the polar plate is titanium plate subjected to surface treatment or stainless steel plate plated with tantalum.
An anode flow field is arranged on one surface of the anode plate 3, a cathode flow field is arranged on one surface of the cathode plate 5, and the anode plate 3 and the cathode plate 5 can be assembled into a bipolar plate through sealing so as to be used for connecting a plurality of electrolytic cells in series. In addition, the anode plate 3 is provided with a water inlet and a water-oxygen outlet; the cathode plate 5 is provided with an air inlet and a nitrogen outlet. The conductive plate is used for connecting wires to apply external voltage. The front end plate 1 is provided with a water inlet, a water oxygen outlet, and the rear end plate 7 is provided with an air inlet and a nitrogen outlet.
The middle of the device is a membrane electrode 4, and as shown in fig. 2, the membrane electrode 4 is sequentially composed of an anode diffusion layer 11, an anode catalytic layer 9, a solid polymer membrane 8, a cathode catalytic layer 10 and a cathode diffusion layer 12; the diffusion layer is made of titanium grid/net/felt, carbon paper, stainless steel grid plate and other materials; the catalytic layer is prepared on the solid polymer film 8 by adopting a heating spraying transfer printing method or direct spraying or knife coating; the catalyst adopts Ir, irO2, ruO2 unitary catalyst or IrO2/SnO2, irO2/Sb-SnO2, irO2/TiO2 and other supported or nickel-based, iron-based and molybdenum-based non-noble metal catalysts and the like; the solid polymer membrane 8 uses a perfluorosulfonic acid membrane or an enhanced perfluorosulfonic acid membrane or an anion exchange membrane for transporting water vapor and protons or hydroxyl ions generated by electrolysis.
As shown in fig. 3, the solid polymer membrane electrochemical nitrogen and oxygen generator composed of a plurality of pairs of electrolytic cells is formed by connecting a membrane electrode 4 and bipolar plates in series, and two ends are a conductive plate and an end plate.
The invention can be realized by adopting or referring to the prior art at the places which are not described in the invention.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.
The foregoing is merely exemplary of the present invention and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are to be included in the scope of the claims of the present invention.
Claims (6)
1. An electrochemical device for preparing nitrogen and oxygen by solid polymer membrane electrolysis is characterized in that,
the electrochemical nitrogen and oxygen generating device is obtained by modifying a solid polymer membrane electrolysis device, and the structure of the electrochemical nitrogen and oxygen generating device sequentially comprises: front end plate, conductive plate, anode plate, membrane electrode, cathode plate, conductive plate, back end plate, and insulating gasket for sealing and screw and nut for assembling.
2. An electrochemical nitrogen and oxygen generating apparatus according to claim 1, characterized in that,
the anode plate is provided with a water inlet and a water-oxygen outlet; the negative plate is provided with an air inlet and a nitrogen outlet; the middle of the device is a membrane electrode which consists of a solid polymer membrane, a cathode-anode catalytic layer and a cathode-anode gas diffusion layer and is used for transmitting protons or anions generated by water vapor and water electrolysis; the conducting plate is used for connecting the conducting wires to apply external voltage; the front end plate is provided with a water inlet, a water-oxygen outlet and the rear end plate is provided with an air inlet and a nitrogen outlet; in addition, the end plate is provided with a fastening screw hole, and screw holes are arranged at corresponding positions of the anode plate and the cathode plate, so that the assembly and the fixation of each plate, the sealing gasket and the membrane electrode can be realized.
3. An electrochemical nitrogen and oxygen generating apparatus according to claim 1, characterized in that,
an anode flow field is arranged on one surface of the anode plate, a cathode flow field is arranged on one surface of the cathode plate, and the anode plate and the cathode plate can be assembled into a bipolar plate through sealing so as to be used for connecting a plurality of electrolytic cells in series; the shape of the polar plate can be, but is not limited to, round or square commonly used for water electrolysis; the material of the polar plate is titanium plate subjected to surface treatment or stainless steel plate plated with tantalum.
4. An electrochemical nitrogen and oxygen generating apparatus according to claim 1, characterized in that,
the membrane electrode sequentially comprises an anode diffusion layer, an anode catalytic layer, a solid polymer membrane, a cathode catalytic layer and a cathode diffusion layer; the diffusion layer is made of titanium grid/net/felt, carbon paper, stainless steel grid plate and other materials; the catalytic layer is prepared on the solid polymer film by adopting a heating spraying transfer printing method or direct spraying or knife coating; the catalyst adopts Ir, irO2, ruO2 unitary catalyst or IrO2/SnO2, irO2/Sb-SnO2, irO2/TiO2 and other supported or nickel-based, iron-based and molybdenum-based non-noble metal catalysts and the like.
5. An electrochemical nitrogen and oxygen generating apparatus according to claim 1, characterized in that,
the solid polymer membrane uses a perfluorosulfonic acid membrane or an enhanced perfluorosulfonic acid membrane or an anion exchange membrane.
6. An electrochemical nitrogen and oxygen generating apparatus according to claim 1, characterized in that,
the insulating gasket is made of fluororubber or silicone rubber, is integrally formed by stamping through a cutting die, and is provided with sealing gasket buffer grooves on the anode plate, the cathode plate and the end plate for giving the sealing gasket a telescopic space after being compressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311808421.2A CN117758287A (en) | 2023-12-26 | 2023-12-26 | Electrochemical device for preparing nitrogen and oxygen by solid polymer membrane electrolysis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311808421.2A CN117758287A (en) | 2023-12-26 | 2023-12-26 | Electrochemical device for preparing nitrogen and oxygen by solid polymer membrane electrolysis |
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| Publication Number | Publication Date |
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| CN117758287A true CN117758287A (en) | 2024-03-26 |
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| CN202311808421.2A Pending CN117758287A (en) | 2023-12-26 | 2023-12-26 | Electrochemical device for preparing nitrogen and oxygen by solid polymer membrane electrolysis |
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| CN (1) | CN117758287A (en) |
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