CN218089827U - Seawater hydrogen production electrode and seawater hydrogen production electrolysis unit - Google Patents
Seawater hydrogen production electrode and seawater hydrogen production electrolysis unit Download PDFInfo
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Abstract
The application provides a sea water hydrogen manufacturing electrode and sea water hydrogen manufacturing electrolysis unit for sea water electrolysis hydrogen manufacturing, sea water hydrogen manufacturing electrode includes: an electrode base having a supporting property and conductivity; a metal catalyst layer compounded on one surface of the electrode substrate; a conductive polymer layer composited on the metal catalyst layer; a sulfonic acid group-rich protective layer compounded on the conductive polymer layer; the metal catalyst layer has the functions of catalyzing, electrolyzing and producing hydrogen and/or oxygen; a three-dimensional interface is formed among the metal catalyst layer, the conductive polymer layer and the sulfonic acid group-rich protective layer; the sulfonic acid group-rich protective layer has a proton conducting effect. The electrode can repel chloride ions in the process of preparing hydrogen from seawater, and prevents the chloride ions from directly contacting with metal of the electrode body, so that the corrosion of the chloride ions and the competitive oxidation reaction are avoided, the service life of the electrode is prolonged, and the hydrogen preparation catalysis performance is improved.
Description
Technical Field
The application relates to the technical field of hydrogen energy and seawater resource utilization, in particular to a seawater hydrogen production electrode and a seawater hydrogen production electrolysis unit.
Background
The reserves of seawater on the earth are very rich, and resources such as offshore wind energy, solar energy, wave energy and the like are rich, so that an attempt is made to generate electricity by utilizing offshore renewable energy sources and couple seawater electrolysis to produce hydrogen in the existing project. The principle of water electrolysis hydrogen production is that stable direct current is introduced into hydrogen production equipment, pure water generates hydrogen on the cathode side of an electrolysis small chamber under the action of the direct current, and oxygen is generated on the anode side of the electrolysis small chamber. Based on the characteristics of high response speed and adaptation to dynamic operation of a PEM (proton exchange membrane) water electrolysis hydrogen production system, the system can theoretically utilize seawater resources to absorb hydrogen production.
The proton exchange membrane electrolysis replaces a diaphragm and electrolyte in the traditional alkaline electrolytic cell with a perfluorinated sulfonic acid type proton exchange membrane, the proton exchange membrane is combined with an electrocatalyst to form a porous electrode, and the movement of hydrogen ions is realized by sulfonate ions on the membrane. However, the salt content of seawater is very high, and most of operated offshore hydrogen production projects need to be pretreated by reverse osmosis and other processes, so that the treatment difficulty is high, the cost is high, the quality of effluent is unstable, and the service life and the performance of electrolytic hydrogen production equipment are influenced. In addition, the chlorine ions in the seawater have a corrosion effect on the electrodes; the chloride ions form a competitive reaction of the water oxidation reaction in the electrochemical reaction process, so that the activity of hydrogen production by electrolysis is reduced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the application provides a seawater hydrogen production electrode and a seawater hydrogen production electrolysis unit, and the electrode can repel chloride ions in the seawater hydrogen production process, so that the direct contact between the chloride ions and the metal of the electrode body is prevented, the corrosion of the chloride ions and the competitive oxidation reaction are avoided, the service life of the electrode is prolonged, and the hydrogen production catalysis performance is improved.
The application provides a sea water hydrogen production electrode for sea water electrolysis hydrogen production, sea water hydrogen production electrode includes: an electrode base having a supporting property and conductivity; a metal catalyst layer compounded on one surface of the electrode substrate; a conductive polymer layer compounded on the metal catalyst layer; a sulfonic acid group-rich protective layer compounded on the conductive polymer layer;
the metal catalyst layer has the functions of producing hydrogen and/or oxygen by catalytic electrolysis; a three-dimensional interface is formed among the metal catalyst layer, the conductive polymer layer and the sulfonic acid group-rich protective layer; the sulfonic acid group-rich protective layer has a proton conducting effect.
Preferably, the electrode substrate is a metal-based substrate or a graphite-based substrate.
Preferably, the electrode substrate is a carbon steel plate, a carbon steel mesh, a stainless steel plate, a stainless steel mesh, a titanium plate, a titanium mesh, nickel foam, a graphite plate or a graphite mesh.
Preferably, the metal-based catalytic layer has a metal particle morphology.
Preferably, the conductive polymer layer is a metal heteroaromatic polymer compound film.
Preferably, the sulfonic acid group-rich protective layer is a Nafion protective layer, a sulfonated polyether ether ketone protective layer, a sulfonated polysulfone protective layer or a sulfonated polystyrene protective layer.
Preferably, the sulfonic acid group-rich protective layer has a thickness of 50 to 100 μm.
The application provides a seawater hydrogen production electrolysis unit, which comprises a cathode, a diaphragm and an anode, wherein the cathode and the anode are the seawater hydrogen production electrodes;
the membrane is located inside the cathode and the anode, and the metal-based catalytic layer in the cathode and the anode is opposed to the membrane.
Compared with the prior art, the application provides a seawater hydrogen production electrode which is suitable for producing hydrogen by taking seawater as a raw material. The electrode structure comprises an electrode substrate, a metal catalyst layer, a conductive polymer layer and a sulfonic acid group-rich protective layer, wherein the electrode substrate has support property and conductivity; the metal catalyst layer has the functions of catalyzing, electrolyzing and producing hydrogen and/or oxygen; the sulfonic acid group-rich protective layer has a proton conduction effect; and a conductive polymer layer is arranged between the sulfonic acid group-rich protective layer and the metal catalyst layer to form a three-dimensional interface. In the application, the sulfonic acid group-rich protective layer enables the surface of the electrode to have rich sulfonic acid groups, and the electrode has high stability in a high-chloride ion environment of seawater and can catalyze hydrogen production and oxygen production reactions at the same time. In the process of hydrogen production by seawater electrolysis, the sulfonic acid groups on the surface of the electrode can block chloride ions to play a role in protection, so that the generation of chloride ion corrosion and competitive oxidation reaction is avoided, the service life of the electrode is prolonged, and the hydrogen production catalysis performance is improved; the conductive polymer layer is introduced and a three-dimensional interface is formed, so that the contact between the protective layer and the catalyst layer can be improved, the conductivity is enhanced, and the low hydrogen production energy consumption is shown.
The electrolytic hydrogen production unit containing the electrode can be used for directly electrolyzing seawater, so that the limitation of fresh water resource shortage on electrolytic hydrogen production application is avoided, the electrolytic hydrogen production cost is reduced, and the application range of electrolytic hydrogen production is expanded. In addition, the electrode can adopt common metal and a sulfonic acid group-rich protective layer as raw materials, the cost is low, and the preparation method is simple and easy to implement.
Drawings
Fig. 1 is a schematic structural diagram of a seawater hydrogen production electrode provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of an electrolysis unit for producing hydrogen from seawater according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The application provides a sea water hydrogen manufacturing electrode for sea water electrolysis hydrogen manufacturing, sea water hydrogen manufacturing electrode includes:
an electrode base having a supporting property and conductivity;
a metal catalyst layer compounded on one surface of the electrode substrate;
a conductive polymer layer composited on the metal catalyst layer;
a sulfonic acid group-rich protective layer compounded on the conductive polymer layer;
the metal catalyst layer has the functions of catalyzing, electrolyzing and producing hydrogen and/or oxygen; a three-dimensional interface is formed among the metal catalyst layer, the conductive polymer layer and the sulfonic acid group-rich protective layer; the sulfonic acid group-rich protective layer has a proton conducting effect.
The electrode provided by the application is suitable for seawater electrolytic hydrogen production, can repel chloride ions in the reaction process, can prolong the service life of the electrode and catalyze hydrogen production, is low in cost, and is beneficial to popularization and application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a seawater hydrogen production electrode according to an embodiment of the present application; wherein, 1 is an electrode substrate, 2 is a metal catalyst layer, 3 is a conductive polymer layer, and 4 is a sulfonic acid group-rich protective layer.
The seawater hydrogen production electrode described in the embodiment of the present application includes: the electrode comprises an electrode substrate 1, a metal catalyst layer 2, a conductive polymer layer 3 and a sulfonic acid group-rich protective layer 4.
In the embodiment of the present application, the electrode substrate 1 is a supporting substrate with certain strength and conductivity, and it may also have a porous structure, mainly a common metal-based substrate or graphite-based substrate, including but not limited to carbon steel plate/mesh, stainless steel plate/mesh, titanium plate/mesh, graphite plate/mesh, nickel foam, etc., and the thickness of the substrate is typically 100-500 μm.
One surface of the electrode substrate 1 is compounded with a metal catalyst layer 2, and the metal catalyst layer has the functions of catalyzing and electrolyzing hydrogen and/or oxygen. The metal catalyst layer is composed of metal and alloy thereof, metal oxide and complex thereof having the function of catalyzing electrolysis to produce hydrogen and/or oxygen, preferably one or more transition metal elements selected from iron (Fe), cobalt (Co), nickel (Ni), molybdenum (Mo) and the like, such as a nickel-iron alloy catalyst layer.
The metal catalyst layer 2 is continuously distributed on the surface of the electrode substrate 1 and can be attached or generated in situThe catalytic film layer is formed in a way that the catalytic film layer and the electrode substrate 1 have a composite effect. In some embodiments of the present application, the content of the catalytic layer metal component supported on the surface of the electrode substrate is preferably 0.2 to 2.0mg/cm 2 More preferably 0.3 to 1.6mg/cm 2 . In addition, the metal catalyst layer in the embodiment of the application has the metal particle morphology, and the metal particles can be used as anchoring sites of the composite membrane, so that the combination of the membrane and the matrix is firmer.
The electrode in the embodiment of the application comprises a conductive polymer layer 3 and a sulfonic acid group-rich protective layer 4, which are sequentially compounded on a catalyst layer 2. The conductive polymer layer 3 is positioned between the metal catalyst layer 2 and the sulfonic acid group-rich protective layer 4 to form a three-dimensional interface, so that the contact between the protective layer and the catalyst layer is improved, the conductivity is enhanced, and the hydrogen production energy consumption is reduced during application. Preferably, the molecular conductance of the conductive molecule is 10 -4 G 0 The above.
In the embodiment of the present application, the conductive polymer layer 3 is mainly formed of a conductive polymer material on the surface of the metal catalyst layer, and may be continuously or discontinuously distributed. Preferably, the conductive polymer layer is a metal heteroaromatic polymer composite film, the component of the conductive polymer layer is a metal heteroaromatic polymer composite, the metal in the metal heteroaromatic polymer composite film has the function of catalyzing electrolysis to produce hydrogen and/or oxygen, and the metal heteroaromatic polymer composite film is preferably one or more of metals in a metal catalyst layer. Specifically, the conductive polymer layer is composed of nickel (II) -phthalocyanine, and a film layer is formed on the surface of the metal catalyst layer by spin coating or the like.
As shown in fig. 1, the electrode of the preferred embodiment of the present application has a metal-organic composite molecular layer 3 on the surface, and organic component molecules extend into the sulfonic acid group-rich protective layer; the metal component is combined with the surface of the electrode to form a conductive molecular structure (for example, in an M-O-M bonding mode, the first M is catalytic layer metal, and the second M is conductive molecular metal), so that the conductivity of the film is increased, the interface contact is increased, and the mass transfer resistance is reduced.
The sulfonic acid group-rich protective layer 4 has a proton conductive function and is continuously distributed on the surface of the conductive polymer layer 3, and the film layer is preferably formed by a drop casting method. In the embodiment of the present application, the sulfonic acid group-rich protective layer 4 is a polymer membrane rich in sulfonic acid groups, such as a Nafion membrane, a sulfonated polyether ether ketone membrane, a sulfonated polysulfone membrane, a sulfonated polystyrene membrane, and the like, and is preferably a sulfonated polyether ether ketone protective layer. In general, the degree of sulfonation of the sulfonic acid group-rich protective layer 4 may range from 50 to 85%, preferably from 70 to 75%; the tensile strength is more than 25 MPa. The thickness of the sulfonic acid group-rich protective layer is preferably 50 to 100 micrometers, such as 50 micrometers, 60 micrometers, 90 micrometers, 95 micrometers, and the like.
In the application, due to the existence of the sulfonic acid group-rich protective layer, the surface of the electrode has rich sulfonic acid groups, so that chloride ions can be repelled in the reaction process, and the direct contact between the chloride ions and the metal of the electrode body is prevented, thereby avoiding the corrosion of the chloride ions and the occurrence of competitive oxidation reaction, prolonging the service life of the electrode and improving the catalytic performance of hydrogen production. The electrode has high stability in a high-chloride ion environment of seawater, can catalyze hydrogen production and oxygen production reactions at the same time, and the presence of the conductive polymer layer is also beneficial to improving the hydrogen production activity of electrolyzed water. The electrode has low cost and simple and easy preparation method.
The embodiment of the application provides a preparation method of the seawater hydrogen production electrode, which comprises the following steps: providing an electrode substrate with supportability and conductivity;
forming a metal catalyst layer which is continuously distributed on one surface of the electrode substrate in a coating attachment or in-situ generation mode; the metal catalyst layer has the functions of catalyzing, electrolyzing and producing hydrogen and/or oxygen;
and sequentially compounding a conductive polymer layer and a sulfonic acid group-rich protective layer on the metal catalyst layer, wherein the sulfonic acid group-rich protective layer has a proton conduction effect, so that the seawater hydrogen production electrode with a three-dimensional interface is obtained.
The embodiment of the application firstly carries out pretreatment on an electrode substrate: preferably, the electrode matrix is washed by water and diluted hydrochloric acid for 2-3 times respectively, so that subsequent film layer compounding is facilitated. Then, the embodiment of the application sequentially performs metal catalyst layer synthesis, conductive polymer synthesis and sulfonic acid group-rich protective layer synthesis, so as to prepare the seawater hydrogen production electrode.
In the embodiment of the present application, the metal catalyst layer is formed on the surface of the pretreated electrode substrate in a manner of coating, attaching or in-situ forming. As described above, the electrode substrate, the metal catalyst layer component, and the like may be made of commercially available raw materials such as metal substances.
Specifically, taking a nickel-iron alloy catalyst layer as an example, the synthesis method is as follows:
in some embodiments, the attachment is used: mixing the nickel and iron salt mixed salt solution and the porous carbon carrier according to a certain proportion, adjusting the pH value of the solution, and reacting for 2-4 hours under full stirring. Washing the formed slurry with water and ethanol for 2-3 times in a centrifugal separation mode, re-dispersing the slurry in an ethanol water solution, and uniformly attaching the slurry to the surface of the carbon or graphite sheet-like electrode substrate in a spraying mode. Preferably, the molar ratio of nickel to iron in the nickel-iron mixed salt solution is 1:1-3; the mass ratio of the total mass of nickel and iron in the mixed salt solution to the porous carbon carrier is 1-1.5:2; the content of the metal of the catalyst layer loaded on the surface of the electrode substrate is 0.2-2.0mg/cm 2 。
In other embodiments, in situ generation (e.g., electrodeposition) is used: the pretreated electrode substrate is taken as a cathode, a platinum sheet is taken as an anode, a nickel-iron salt mixed salt solution is taken as electrolyte, an external power supply is connected for carrying out electrodeposition reaction, the potential constant in the electrodeposition process is adjusted to be 1.4V-1.6V by the external power supply, the system temperature is maintained at 20-40 ℃, and the total process deposition time can be 250-300 seconds. For example, the total mass concentration of nickel and iron metals in the electrolyte of the system can be 30-100g/L, the mass concentration ratio of nickel and iron is preferably 1:1-3, and the electrolyte can further comprise: h 3 BO 3 6-10g/L, 0.3-0.5g/L ascorbic acid and 0.5-1g/L sodium dodecyl sulfate.
In a preferred embodiment of the present application, the conductive polymer layer is formed on the surface of the metal catalyst layer by spin coating, and then the sulfonic acid group-rich protective layer is synthesized on the surface of the conductive polymer layer by drop casting. Further preferably, the sulfonic acid group-rich protective layer component is sulfonated polyether ether ketone; the conductive polymer layer is nickel (II) -phthalocyanine (NiPc).
The conductive polymer layer forming method specifically includes: repeatedly brushing and coating a Dimethylformamide (DMF) solution in which NiPc is dissolved on the surface of the electrode catalyst layer loaded with the catalyst layer, wherein the mass ratio of the solid is preferably 0.5-2%, and then drying in vacuum.
The sulfonic acid group-rich protective layer is continuously distributed on the surface of the conductive polymer layer in a drop casting forming mode; specifically, the spin coating method is as follows:
uniformly spin-coating DMF solution dissolved with sulfonated high molecular material (such as sulfonated polyether ether ketone, mass fraction of which can be 20-50%) on the surface of the electrode coated with the conductive high molecular layer, and then vacuum drying to form a sulfonic group-rich protective layer with the thickness of 50-100 microns, thus obtaining the electrode.
In addition, the embodiment of the application also provides the application of the seawater hydrogen production electrode composition electrolysis hydrogen production unit in seawater hydrogen production through electrolysis. The present application provides a hydrogen production electrolysis unit, which is used for performing electrolysis hydrogen production by using seawater as a raw material (also referred to as a seawater electrolysis hydrogen production unit structure), and includes a cathode, a diaphragm and an anode, wherein the cathode and the anode are the seawater hydrogen production electrodes described above, the diaphragm is located at the inner sides of the cathode and the anode, and metal catalyst layers in the cathode and the anode are opposite to the diaphragm.
In the embodiment of the application, the electrodes form an electrolytic hydrogen production unit in the order of cathode, diaphragm and anode; specifically, as shown in fig. 2, 1 is a cathode, 2 is a separator, and 3 is an anode.
The electrolytic hydrogen production unit structure comprises a cathode 1, a diaphragm 2 and an anode 3. The cathode 1 and the anode 3 are the seawater hydrogen production electrode. The membrane 2 is located inside the cathode 1 and the anode 3, and the metal catalyst layer in the cathode 1 and the anode 3 is opposite to the membrane 2.
The cathode and the anode have the same catalytic layer synthesis mode and protective layer formation mode, and the catalytic layer and the protective layer can be selected from the same or different specific selection modes for a certain electrolytic unit.
The membrane is usually Nafion membrane, and can be replaced by polysulfone, polyphenyl, etc., and can be obtained by market.
In the embodiment of the application, the cathode and the anode of the electrolytic hydrogen production unit are the seawater hydrogen production electrodes, so that the service life and the performance stability of the material can be improved in the process of directly producing hydrogen from seawater, and the cost of electrolytic hydrogen production is reduced. The electrolytic hydrogen production system containing the electrode can be used for directly electrolyzing seawater, so that the limitation of fresh water resource shortage on electrolytic hydrogen production application is avoided, the electrolytic hydrogen production cost is reduced, and the application range of electrolytic hydrogen production is expanded.
In order to better understand the technical content of the present application, specific examples are provided below, and the present application is further described in detail. In the examples of the present application, commercially available raw materials were used unless otherwise specified.
Example 1
The embodiment provides an electrode and an electrolytic hydrogen production unit structure which are suitable for hydrogen production by taking seawater as a raw material. The electrode structure comprises an electrode substrate, a metal catalyst layer, a conductive polymer layer and a sulfonic acid group-rich protective layer. The electrode substrate is a stainless steel mesh with the thickness of 500 microns; the metal catalyst layer is a nickel-iron alloy catalyst layer; the conductive polymer layer is a nickel (II) -phthalocyanine film layer; the sulfonic group-rich protective layer is a sulfonated polyether ether ketone protective layer.
The preparation method of the electrode comprises the following steps:
1. and (4) pretreating the electrode substrate. Washing the electrode matrix with water and diluted hydrochloric acid for 2-3 times.
2. And (5) synthesizing the catalyst layer. Mixing the nickel and iron salt mixed salt solution with the porous carbon carrier, adjusting the pH value of the solution, and reacting for 2 hours under full stirring. Wherein the molar ratio of nickel to iron in the nickel-iron mixed salt solution is 1:2; the mass ratio of the total mass of nickel and iron in the mixed salt solution to the porous carbon carrier is 1-1.5:2. washing the formed slurry with water and ethanol for 2-3 times in a centrifugal separation mode, re-dispersing in ethanol water solution, and uniformly attaching to the surface of an electrode substrate in a spraying mode, wherein the amount of the metal loaded on the catalyst layer on the surface of the electrode substrate is 1.5-1.6mg/cm 2 。
3. And (3) synthesizing a conductive polymer layer. A DMF solution (solid mass ratio: 1.0%) in which NiPc is dissolved is repeatedly brushed on the surface of the electrode catalyst layer on which the catalyst layer is loaded, and then vacuum drying is carried out (50 ℃ for 12 hours).
4. And synthesizing the sulfonic-group-rich protective layer. Uniformly dripping or spin-coating a DMF solution dissolved with sulfonated polyether ether ketone (mass fraction of 30%) on the surface of the electrode coated with the conductive polymer layer, and then drying in vacuum (50 ℃ for 12 hours); the protective layer was formed to a thickness of 50 microns.
The electrodes form an electrolytic hydrogen production unit in the order of cathode, diaphragm and anode. The electrolytic hydrogen production unit structure is shown in fig. 2 and comprises a cathode 1, a diaphragm 2 and an anode 3. The cathode 1 and the anode 3 are both the above-described electrodes. The membrane 2 is located inside the cathode 1 and the anode 3, and the catalytic layers of the cathode 1 and the anode 3 are opposite to the membrane 2.
The seawater hydrogen production electrode is marked as an electrode 1, and an electrode 2 without a conductive polymer layer and an electrode 3 without a conductive polymer layer and a protective layer are respectively prepared according to the method; comparing the performance of the method in the process of preparing hydrogen from seawater.
The results are as follows:
TABLE 1 Hydrogen production performance of seawater Hydrogen production electrode described in the examples of this application
| Cell voltage, V | 1000A/m 2 | 1000A/m 2 , |
| Electrode | ||
| 1 | 1.78 | 1.81 |
| |
1.85 | 1.88 |
| |
1.91 | 2.20 |
Therefore, the water electrolysis hydrogen production activity of the electrode is remarkably improved due to the protective layer; the presence of the conductive polymer layer also contributes to the improvement of hydrogen production activity by water electrolysis. In addition, due to the existence of the protective layer, the attenuation rate of the electrode in the seawater for long-term operation is remarkably reduced, and the voltage attenuation rate per hour is reduced from 0.6% to less than 00.1%.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A seawater hydrogen production electrode is used for seawater electrolysis hydrogen production and is characterized by comprising:
an electrode base having a supporting property and conductivity;
a metal catalyst layer compounded on one surface of the electrode substrate;
a conductive polymer layer composited on the metal catalyst layer;
a sulfonic acid group-rich protective layer compounded on the conductive polymer layer;
the metal catalyst layer has the functions of catalyzing, electrolyzing and producing hydrogen and/or oxygen; a three-dimensional interface is formed among the metal catalyst layer, the conductive polymer layer and the sulfonic acid group-rich protective layer; the sulfonic acid group-rich protective layer has a proton conducting effect.
2. The seawater hydrogen production electrode as claimed in claim 1, wherein the electrode substrate is a metal-based substrate or a graphite-based substrate.
3. The seawater hydrogen production electrode as claimed in claim 2, wherein the electrode substrate is a carbon steel plate, a carbon steel mesh, a stainless steel plate, a stainless steel mesh, a titanium plate, a titanium mesh, foamed nickel, a graphite plate or a graphite mesh.
4. The seawater hydrogen production electrode of claim 1, wherein the metal-based catalytic layer has a metal particle morphology.
5. The seawater hydrogen production electrode according to claim 1, wherein the conductive polymer layer is a metal heteroaromatic polymer compound film.
6. The seawater hydrogen production electrode as claimed in claim 1, wherein the sulfonic acid group-rich protective layer is a Nafion protective layer, a sulfonated polyether ether ketone protective layer, a sulfonated polysulfone protective layer or a sulfonated polystyrene protective layer.
7. The seawater hydrogen production electrode as claimed in claim 1, wherein the sulfonic acid group-rich protective layer has a thickness of 50-100 μm.
8. A seawater hydrogen production electrolysis unit comprises a cathode, a diaphragm and an anode, and is characterized in that the cathode and the anode are the seawater hydrogen production electrode of any one of claims 1 to 7;
the membrane is located inside the cathode and the anode, and the metal-based catalytic layer in the cathode and the anode is opposed to the membrane.
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| CN115821283A (en) * | 2022-08-29 | 2023-03-21 | 中国华能集团清洁能源技术研究院有限公司 | Seawater hydrogen production electrode and preparation method and application thereof |
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| CN115821283B (en) * | 2022-08-29 | 2023-09-05 | 中国华能集团清洁能源技术研究院有限公司 | Seawater hydrogen production electrode and preparation method and application thereof |
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