CN110791773A - Method and device for producing hydrogen by electrolyzing water - Google Patents
Method and device for producing hydrogen by electrolyzing water Download PDFInfo
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- CN110791773A CN110791773A CN201810871242.6A CN201810871242A CN110791773A CN 110791773 A CN110791773 A CN 110791773A CN 201810871242 A CN201810871242 A CN 201810871242A CN 110791773 A CN110791773 A CN 110791773A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/70—Assemblies comprising two or more cells
- C25B9/73—Assemblies comprising two or more cells of the filter-press type
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
- C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
- C25B9/23—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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Abstract
The invention relates to the field of hydrogen production by water electrolysis, and discloses a method and a device for hydrogen production by water electrolysis, wherein the method comprises the following steps: under the action of direct current, the cathode side is subjected to reduction reaction to prepare hydrogen, the anode side is subjected to oxidation reaction to generate oxygen, and the electrolyte on the cathode side and the electrolyte on the anode side have pH difference; the cathode side and the anode side are separated by an electrode assembly which is an ion exchange membrane coated with an anode catalyst and a cathode catalyst on the surfaces of both sides respectively. The ion exchange membrane can selectively permeate anions or cations, and the existence of the pH difference between the electrolyte on the cathode side and the electrolyte on the anode side can accelerate the ion conduction rate, thereby improving the electrolysis efficiency and reducing the energy consumption.
Description
Technical Field
The invention relates to the field of hydrogen production by water electrolysis, in particular to a method and a device for producing hydrogen by water electrolysis.
Background
In recent years, the problems of global warming, environmental pollution, underground resource reduction and the like become increasingly serious, and renewable energy sources at home and abroad are greatly developed. However, renewable energy sources are not geographically uniform, and the output power thereof varies greatly, so that there is a limit in delivering electric power generated from natural energy sources to a general electric power system, and further, there is a large variation in the amount of generated electric power due to differences in weather and seasons. Therefore, the hydrogen production by electrolyzing water becomes a new energy storage and peak regulation means. With the development of hydrogen energy, the hydrogen production by water electrolysis is also a convenient hydrogen source supply mode.
At present, the hydrogen production by water electrolysis mainly comprises three technologies, namely alkaline water electrolysis hydrogen production, Proton Exchange Membrane (PEM) water electrolysis hydrogen production and solid oxide water electrolysis hydrogen production. The solid oxide electrolysis technology has limited selection, sealing and operation control of electrolytic materials due to overhigh working temperature, and cannot be applied and popularized all the time. The alkaline water electrolysis hydrogen production and the PEM water electrolysis hydrogen production are relatively mature technologies, and the scale of the PEM water electrolysis hydrogen production gradually develops to the MW scale. However, the cost of hydrogen production by water electrolysis is still high at present, and how to further improve the electrolysis efficiency and reduce the electric energy consumption of hydrogen per unit mass/volume becomes an urgent problem to be solved.
CN104364425A discloses a bipolar alkaline hydrolysis unit and an electrolytic bath, which take KOH solution as electrolyte solution, are the traditional alkaline water electrolysis hydrogen production technology and have the problems of pollution, low efficiency and the like.
CN105483747A discloses a method and a device for improving electrolysis efficiency by using a bipolar membrane composed of an acidic solution in a cathode chamber, an alkaline solution in an anode chamber and a cation exchange membrane and an anion exchange membrane in the middle. However, bipolar membranes are currently used mainly in electrodialysers, the main characteristic being the conversion of water-soluble (or other solvent) salts into solutions of the corresponding acids and bases, without redox reactions taking place. The bipolar membrane has high price and short service life, and has no precedent for large-scale industrial application in China. Moreover, the bipolar membrane has high resistance, the selectivity needs to be further improved, and acid-base neutralization reaction is easy to occur in acid-base environment at present.
The SPE water electrolysis hydrogen production technology is totally called as the solid polymer electrolyte water electrolysis hydrogen production technology. The SPE membrane electrode is a metal + SPE composite membrane electrode structure formed by directly attaching an electrocatalyst to a membrane, and an ionic membrane solid electrolyte is used for replacing a liquid electrolyte, so that the SPE membrane electrode has the advantages of easy separation of products, capability of inhibiting side reactions and the like, and is currently applied to hydrogen production industries of various countries in the world. In the process of electrolyzing pure water by the SPE water electrolysis hydrogen production technology, due to the separation of the proton exchange membrane, a large amount of H is generated in the anode in the electrooxidation process+So that the pH of the anode is reduced, and the cathode consumes H due to a large amount of hydrogen+Causing the cathode pH to rise, bringing about a concentration potential. To overcome the concentration potential and maintain amperage, SPE cell tanks must be pressurized, thereby resulting in increased energy consumption.
At present, the water electrolysis hydrogen production technology which has high electrolysis efficiency, high purity of produced hydrogen, low power consumption and easy industrial application needs to be provided, and the cost of water electrolysis hydrogen production is reduced.
Disclosure of Invention
The invention aims to solve the problem of energy consumption increase caused by concentration potential in the existing SPE water electrolysis hydrogen production technology, and provides a method and a device for producing hydrogen by electrolyzing water by utilizing the pH difference of electrolyte on a cathode side and an anode side. The method can improve the ion conduction rate, further improve the electrolysis efficiency and reduce the energy consumption, and the device is simple and convenient for industrial application.
In order to achieve the above object, a first aspect of the present invention provides a method for producing hydrogen by electrolyzing water, the method comprising:
under the action of direct current, the cathode side is subjected to reduction reaction to prepare hydrogen, the anode side is subjected to oxidation reaction to generate oxygen, and the electrolyte on the cathode side and the electrolyte on the anode side have a pH difference of 0.1-14;
wherein the cathode side and the anode side are separated by an electrode assembly, and the electrode assembly is an ion exchange membrane with two side surfaces coated with an anode catalyst and a cathode catalyst respectively.
In a second aspect, the present invention provides an apparatus for producing hydrogen by electrolyzing water, comprising:
the electrolytic cell is provided with a temperature adjusting and controlling system;
and two or more electrode assemblies disposed in the electrolytic cell, the electrode assemblies being ion exchange membranes having both side surfaces coated with an anode catalyst and a cathode catalyst, respectively, the electrode assemblies being sequentially assembled in the order of anode catalyst corresponding to the anode chambers and cathode catalyst corresponding to the cathode chambers, such that the anode chambers and the cathode chambers are alternately arranged in the electrolytic cell and adjacent anode chambers and cathode chambers are separated by the electrode assemblies.
Through the technical scheme, the electrolytic efficiency can be improved, and the energy consumption can be reduced.
Drawings
Fig. 1 is a schematic structural view of an apparatus for producing hydrogen by electrolyzing water according to an embodiment of the present invention.
Description of the reference numerals
1-an electrolytic cell; 2-an electrode assembly; 3-ion exchange membrane; 4-an anode catalyst; 5-a cathode catalyst; 6-bipolar plate; 7-an anode chamber; and 8-cathode chamber.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
In a first aspect, the present invention provides a method for producing hydrogen by electrolyzing water, which is characterized in that the method comprises:
under the action of direct current, the cathode side is subjected to reduction reaction to prepare hydrogen, the anode side is subjected to oxidation reaction to generate oxygen, and the electrolyte on the cathode side and the electrolyte on the anode side have a pH difference of 0.1-14;
wherein the cathode side and the anode side are separated by an electrode assembly, and the electrode assembly is an ion exchange membrane with two side surfaces coated with an anode catalyst and a cathode catalyst respectively.
According to the present invention, the electrolytes on the cathode side and the anode side may be acid solutions or alkali solutions with different concentrations, as long as the pH of the electrolyte on the cathode side is lower than that on the anode side. Preferably, the absolute value of the difference between the pH of the electrolyte on the cathode side and the pH of the electrolyte on the anode side is 4 to 14. In the present invention, the pH difference can be maintained by real-time monitoring and adjustment, which is not described herein again.
One preferred embodiment of the present invention is: the electrolyte on the cathode side is water, and the electrolyte on the anode side is alkaline solution.
More preferably, the alkaline solution is substituted with OH-The calculated concentration is 10-40 wt%.
More preferably, the solute in the alkaline solution is at least one of an alkali metal hydroxide, an alkali metal carbonate, and an alkali metal bicarbonate, and more preferably at least one of potassium hydroxide, sodium hydroxide, lithium hydroxide, potassium carbonate, sodium carbonate, lithium carbonate, potassium bicarbonate, sodium bicarbonate, and lithium bicarbonate.
Another preferred embodiment of the present invention is: the electrolyte on the cathode side is an acidic solution, and the electrolyte on the anode side is water.
More preferably, the acidic solution is in the form of H+The calculated concentration is 5-40 wt%.
More preferably, the solute in the acidic solution is an inorganic strong acid and/or a heteropolyacid (such as a phosphotungstic heteropolyacid, a silicotungstic heteropolyacid, a phosphomolybdic heteropolyacid, and the like), and further preferably at least one of hydrochloric acid, sulfuric acid, and phosphoric acid.
According to the invention, the electrolyte on the cathode side generates hydrogen under the action of the cathode catalyst and the electrolyte on the anode side generates oxygen under the action of the anode catalyst under the condition of introducing direct current. The hydrogen and the cathode side electrolyte are discharged from the cathode side and collected, and then are subjected to gas-liquid separation, and the hydrogen is compressed into a bottle/a tank for storage after being separated; and after the oxygen and the electrolyte on the anode side are discharged and converged from the anode side, gas-liquid separation is carried out, and the oxygen can be emptied or compressed into a bottle/tank for storage after the oxygen is separated.
Preferably, the separated catholyte is recycled to the cathode side and replenished with the amount of water consumed to maintain the catholyte concentration within the desired concentration range; the separated anode side electrolyte is recirculated to the anode side, and the amount of consumed water is replenished to maintain the anode side electrolyte concentration within the desired concentration range.
In the present invention, the temperature of the electrolyte in the cathode side and the anode side is not particularly required, and preferably, the temperature of the electrolyte in the cathode side is 50 to 90 ℃. Preferably, the temperature of the electrolyte at the anode side is 50 to 90 ℃.
In the present invention, the voltage of the direct current may be conventionally selected, and preferably, the voltage of the direct current is 1 to 3.5V.
The electrode assembly is a commonly used metal + SPE composite membrane electrode structure in the SPE water electrolysis hydrogen production technology, and the nanoscale anode catalyst and the nanoscale cathode catalyst are respectively attached to two sides of the ion exchange membrane in a hot-pressing or spraying mode. The ion exchange membrane may be an anion exchange membrane or a cation exchange membrane. The anion exchange membrane is preferably an amino; the cation exchange membrane is preferably of the sulfonic, phosphoric, carboxylic acid group type. More preferably, the coating thickness of the anode catalyst and the cathode catalyst is each independently 15 to 25mg/cm2. As mentioned above, the coating may be performed by a hot pressing method or a spraying method, which is commonly used in the art.
According to the invention, the anode catalyst and the cathode catalyst are metal catalysts commonly used in water electrolysis technology. Preferably, the cathode catalyst is at least one of Pt, Pd, Ru, Au, Ni, Co, Mo, Mn, Zn metals and their oxides, hydroxides, carbides, phosphides, nitrides or sulfides. Preferably, the anode catalyst is at least one of Pt, Pd, Ru, Ir, Ni, Co, Cu, W, Mo, Mn, Zn, Fe, Se metals and their oxides, hydroxides, carbides, phosphides, nitrides or sulfides.
Preferably, when the electrolyte on the cathode side is water and the electrolyte on the anode side is an alkaline solution, the anode catalyst can be a non-noble metal (such as Ni or NiFe layered oxide), so that the device cost can be further reduced.
The method for producing hydrogen by electrolyzing water according to the present invention can be performed in an electrolysis apparatus, and therefore, as shown in fig. 1, a second aspect of the present invention provides an apparatus for producing hydrogen by electrolyzing water, comprising:
the electrolytic cell 1 is provided with a temperature adjusting and controlling system;
and two or more electrode assemblies 2 disposed in the electrolytic cell 1, the electrode assemblies 2 being ion exchange membranes 3 coated with anode catalysts 4 and cathode catalysts 5 on both side surfaces thereof, respectively. In order to enable the electrode assembly 2 to be used more effectively for a longer period of time, it is preferable that bipolar plates 6 be disposed outside the anode catalyst 4 and the cathode catalyst 5. The electrode assembly is assembled in the order of anode catalyst 4 corresponding to anode chamber 7 and cathode catalyst 5 corresponding to cathode chamber 8 such that anode chambers 7 alternate with cathode chambers 8 in cell 1 and adjacent anode chambers 7 are separated from cathode chambers 8 by electrode assembly 2 (as shown in fig. 1).
The principle of hydrogen production by water electrolysis is as follows:
anode side: 2H2O→4H++4e-+O2；
Cathode side: 4H++4e-→2H2。
Alternatively, the first and second electrodes may be,
cathode side: 4H2O+4e-→4OH-+2H2；
Anode side: 4OH-→O2+2H2O+4e-。
During electrolysis, electrons are transferred from the anode to the cathode through an external circuit, and H in the electrolyte+Selectively permeate through the cation exchange membrane or OH-in the electrolyte selectively permeate through the anion exchange membrane, and the pH difference exists at the two sides of the electrode assembly, so that the conduction rate of ions can be accelerated, the electrolysis efficiency is improved, and the reduction of the pH value is realizedLow energy consumption.
The present invention will be described in detail below by way of examples, and the ion exchange membranes and the respective raw materials used in the following examples are commercially available unless otherwise specified. The anode catalyst and the cathode catalyst were coated by a catalyst coating membrane method (CCM) with a thickness of 20mg/cm2(ii) a The energy consumption is calculated by voltage × current/hydrogen production (kWh/Nm)3)。
The following examples are all carried out in an apparatus for the electrolysis of water to produce hydrogen, the apparatus comprising:
the electrolytic cell is provided with a temperature adjusting and controlling system;
and three electrode assemblies disposed in the electrolytic cell, the electrode assemblies being ion exchange membranes having both side surfaces coated with an anode catalyst and a cathode catalyst, respectively, the electrode assemblies being sequentially assembled in the order of anode catalyst corresponding to the anode chambers and cathode catalyst corresponding to the cathode chambers, such that the anode chambers and the cathode chambers are alternately arranged in the electrolytic cell and adjacent anode chambers and cathode chambers are separated by the electrode assemblies.
Example 1
The electrolyte on the cathode side is water at 80 ℃, the electrolyte on the anode side is a 30 wt% KOH solution at 80 ℃, the absolute value of the difference between the pH values of the electrolyte on the cathode side and the electrolyte on the anode side is 8, an ion exchange membrane adopts a Nafion117 membrane (purchased from DuPont, the same below), the cathode catalyst and the anode catalyst are both Pt, and 2.2V direct current voltage is applied to generate H under the action of the cathode catalyst of the electrolyte on the cathode side2The electrolyte on the anode side generates O under the action of the anode catalyst2The energy consumption is 4.0kWh/Nm3。
Example 2
Cathode side electrolyte was 20 wt% H at 80 deg.C2SO4The solution, the electrolyte at the anode side is water with the temperature of 80 ℃, the absolute value of the difference between the pH values of the electrolyte at the cathode side and the electrolyte at the anode side is 5, the ion exchange membrane adopts a Nafion117 membrane, the cathode catalyst and the anode catalyst are both Pt, and 2.2V direct current voltage is applied to ensure that the electrolyte at the cathode side generates H under the action of the cathode catalyst2The electrolyte on the anode side generates O under the action of the anode catalyst2The energy consumption is 3.9kWh/Nm3。
Example 3
The electrolyte at the cathode side is 50 ℃ of water, the electrolyte at the anode side is 50 ℃ of 30 wt% KOH solution, the absolute value of the pH difference between the electrolyte at the cathode side and the electrolyte at the anode side is 7.8, and an ion exchange membrane is adopted
X37-50 anion exchange membrane (available from Dioxide Materials, Inc.), cathode catalyst and anode catalyst are both Ni, and 2.2V DC voltage is applied to make cathode side electrolyte generate H under action of cathode catalyst2The electrolyte on the anode side generates O under the action of the anode catalyst2The energy consumption is 4.9kWh/Nm3。
Example 4
The electrolyte at the cathode side is water at the temperature of 80 ℃, the electrolyte at the anode side is a 30 wt% KOH solution at the temperature of 80 ℃, the absolute value of the difference between the pH values of the electrolyte at the cathode side and the electrolyte at the anode side is 8, an ion exchange membrane adopts a Nafion117 membrane, a cathode catalyst is Pt, an anode catalyst is NiFe-LDH, and 2.2V direct current voltage is applied to ensure that the electrolyte at the cathode side generates H under the action of the cathode catalyst2The electrolyte on the anode side generates O under the action of the anode catalyst2The energy consumption is 3.8kWh/Nm3。
Example 5
Cathode side electrolyte was 20 wt% H at 80 deg.C2SO4The solution is a 30 wt% KOH solution with the temperature of 80 ℃ on the anode side, the absolute value of the difference between the pH values of the electrolyte on the cathode side and the electrolyte on the anode side is 13, a Nafion117 membrane is adopted as an ion exchange membrane, Pt is used as a cathode catalyst and an anode catalyst, and 2.2V direct current voltage is applied to ensure that the electrolyte on the cathode side generates H under the action of the cathode catalyst2The electrolyte on the anode side generates O under the action of the anode catalyst2The energy consumption is 3.0kWh/Nm3。
Comparative example 1
Water was electrolyzed according to the method of example 1 except that the electrolyte on the cathode side was water at 80 ℃ and the electrolyte on the anode side was water at 80 ℃The absolute value of the difference between the pH values of the cathode side electrolyte and the anode side electrolyte was 0, and the energy consumption was 5.2kWh/Nm3。
Comparative example 2
Water was electrolyzed according to the method of example 1 except that the catholyte was a 30% by weight KOH solution at 80 ℃ and the anolyte was a 30% by weight KOH solution at 80 ℃, the absolute value of the difference between the pH of the catholyte and the pH of the anolyte was 0, and the energy consumption was 5.1kWh/Nm3。
It can be seen from the above examples and comparative examples that the energy consumption when there is a pH difference between the cathode-side electrolyte and the anode-side electrolyte is lower than that when there is no pH difference between the cathode-side electrolyte and the anode-side electrolyte, indicating that the electrolysis efficiency can be improved and the electrolysis energy consumption can be reduced by using the present invention.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (11)
1. A method for producing hydrogen by electrolyzing water, the method comprising:
under the action of direct current, the cathode side is subjected to reduction reaction to prepare hydrogen, the anode side is subjected to oxidation reaction to generate oxygen, and the electrolyte on the cathode side and the electrolyte on the anode side have a pH difference of 0.1-14;
wherein the cathode side and the anode side are separated by an electrode assembly, and the electrode assembly is an ion exchange membrane with two side surfaces coated with an anode catalyst and a cathode catalyst respectively.
2. The method according to claim 1, wherein the absolute value of the difference between the pH of the electrolyte on the cathode side and the pH of the electrolyte on the anode side is 4-14.
3. The method according to claim 1 or 2, wherein the electrolyte on the cathode side is water and the electrolyte on the anode side is an alkaline solution; or the electrolyte on the cathode side is an acidic solution, and the electrolyte on the anode side is water.
4. The method of claim 3, wherein the alkaline solution is in OH-The concentration is 10-40 wt%, and the acid solution is H+The calculated concentration is 5-40 wt%.
5. The method according to claim 3, wherein the solute in the alkaline solution is at least one of an alkali metal hydroxide, an alkali metal carbonate and an alkali metal bicarbonate, preferably at least one of potassium hydroxide, sodium hydroxide, lithium hydroxide, potassium carbonate, sodium carbonate, lithium carbonate, potassium bicarbonate, sodium bicarbonate and lithium bicarbonate;
and/or the solute in the acidic solution is an inorganic strong acid and/or a heteropolyacid, preferably at least one of hydrochloric acid, sulfuric acid and phosphoric acid.
6. The method according to claim 1, wherein the electrolyte and hydrogen gas on the cathode side are discharged and collected from the cathode side, and then subjected to gas-liquid separation, and the separated electrolyte is recycled to the cathode side and supplemented with the consumed water amount; and after the electrolyte and the oxygen on the anode side are discharged from the anode side, gas-liquid separation is carried out, and the separated electrolyte is recycled to the anode side and is supplemented with the consumed water amount.
7. The method of claim 1, wherein the temperature of the electrolyte on the cathode side is 50-90 ℃ and the temperature of the electrolyte on the anode side is 50-90 ℃.
8. The method of claim 1, wherein the voltage of the direct current is 1-3.5V.
9. The method of claim 1, wherein the cathode catalyst is at least one of Pt, Pd, Ru, Au, Ni, Co, Mo, Mn, Zn metals and their oxides, hydroxides, carbides, phosphides, nitrides or sulfides; the anode catalyst is at least one of Pt, Pd, Ru, Ir, Ni, Co, Cu, W, Mo, Mn, Zn, Fe and Se metal and oxide, hydroxide, carbide, phosphide, nitride or sulfide thereof.
10. The method of claim 1, 4 or 5, the electrolyte on the cathode side being water, the electrolyte on the anode side being a basic solution, and the anode catalyst being a non-noble metal.
11. An apparatus for producing hydrogen by electrolyzing water, the apparatus comprising:
the electrolytic cell is provided with a temperature adjusting and controlling system;
and two or more electrode assemblies disposed in the electrolytic cell, the electrode assemblies being ion exchange membranes having both side surfaces coated with an anode catalyst and a cathode catalyst, respectively, the electrode assemblies being sequentially assembled in the order of anode catalyst corresponding to the anode chambers and cathode catalyst corresponding to the cathode chambers, such that the anode chambers and the cathode chambers are alternately arranged in the electrolytic cell and adjacent anode chambers and cathode chambers are separated by the electrode assemblies.
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| CN113460964A (en) * | 2021-07-02 | 2021-10-01 | 西北工业大学 | Method for obtaining high-purity hydrogen by deeply removing oxygen in hydrogen through electro-catalysis at normal temperature and normal pressure |
| CN114557415A (en) * | 2021-11-08 | 2022-05-31 | 北京化工大学 | Oxygen consumption/oxygen generation device with water absorption film, oxygen migration device and application thereof, and oxygen migration method |
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| CN113460964A (en) * | 2021-07-02 | 2021-10-01 | 西北工业大学 | Method for obtaining high-purity hydrogen by deeply removing oxygen in hydrogen through electro-catalysis at normal temperature and normal pressure |
| CN113460964B (en) * | 2021-07-02 | 2023-07-07 | 西北工业大学 | Method for obtaining high-purity hydrogen by deep removal of oxygen in hydrogen through electrocatalytic action at normal temperature and normal pressure |
| WO2023056292A3 (en) * | 2021-09-28 | 2023-05-11 | Verdagy, Inc. | Systems and methods to make hydrogen gas with a steady-state ph differential |
| CN114557415A (en) * | 2021-11-08 | 2022-05-31 | 北京化工大学 | Oxygen consumption/oxygen generation device with water absorption film, oxygen migration device and application thereof, and oxygen migration method |
| CN114557415B (en) * | 2021-11-08 | 2024-04-26 | 北京化工大学 | Oxygen consumption/generation device with water absorption film, oxygen migration device, application of oxygen consumption/generation device and oxygen migration method |
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