424 results about "Anode catalyst" patented technology

The invention relates to an iridium dioxide catalyst and a preparation method and application thereof, the iridium dioxide catalyst is a material with a three-dimensional porous structure, and the three-dimensional porous structure comprises mesopores and macropores; the characteristic peak of rutile type iridium dioxide exists in the XRD spectrogram of the iridium dioxide catalyst. When the catalyst disclosed by the invention is used as an anode catalyst in water electrolysis hydrogen production, the loading capacity of the catalyst can be effectively reduced, the dispersity is improved, and meanwhile, the catalyst has better mass transfer effect and conductivity, higher catalytic activity and excellent stability.

The invention relates to an anion exchange membrane based on isopropyl piperidone and biphenyl and a preparation method of a membrane electrode, the preparation method comprises the following steps: respectively dissolving an aromatic monomer and IPD in a first solvent, and mixing to obtain a mixed solution, the aromatic monomer being BP or TP; dropwise adding an acidic initiator into the mixed solution for reaction at the reaction temperature of-5 DEG C to 0 DEG C to obtain a nitrogen heterocyclic ring polymer intermediate; adding a quaternization reagent into the nitrogen-containing heterocyclic ring polymer intermediate to realize quaternization modification of nitrogen atoms to obtain a quaternization ionomer; and forming a film to obtain the AEM film. The preparation method of the membrane electrode comprises the following steps: respectively forming a cathode catalyst layer and an anode catalyst layer on two opposite sides of an AEM membrane through ultrasonic spraying to obtain the MEA. The AEM membrane and the MEA obtained according to the invention have the characteristics of excellent stability and high water electrolysis performance, can significantly improve the efficiency and durability of AEMWE, and are suitable for the fields of hydrogen production by water electrolysis and the like.

The invention relates to a membrane electrode with high oxygen permeability and a preparation method thereof, the membrane electrode comprises a proton exchange membrane, an anode catalyst layer and a cathode catalyst layer, the anode catalyst layer and the cathode catalyst layer are arranged on two sides of the proton exchange membrane, and anode catalyst slurry comprises an anode catalyst, an ionomer and a dispersing solvent in a mass ratio of 1: (1-10): (10-1000); the cathode catalyst slurry comprises a cathode catalyst, an ionomer, an ionic liquid and a dispersing solvent in a mass ratio of 1: (1-10): (1-10): (10-1000). Compared with the prior art, in order to solve the problem that oxygen mass transfer of a porous carbon carrier in a fuel cell catalyst layer is difficult, the method that ionic liquid and ionomer are mixed in advance, then slurry is prepared, and the slurry is sprayed to prepare the membrane electrode is adopted, so that a compact structure formed by an ionomer membrane on the surface of a catalyst is weakened, and the distribution uniformity of the ionomer membrane is improved; the local oxygen mass transfer resistance is obviously reduced, and the performance of the fuel cell under high current density is improved.

The invention relates to the technical field of new energy materials, and discloses a gradient porous three-dimensional interpenetrating network direct ammonia fuel cell membrane electrode. The gradient porous three-dimensional interpenetrating network direct ammonia fuel cell membrane electrode comprises an exchange membrane, an anode catalyst layer, a cathode catalyst layer and a gas diffusion layer, wherein the anode catalyst layer and the cathode catalyst layer have gradient pore size distribution from the exchange membrane side to the gas diffusion layer side; wherein the interiors of the anode catalyst layer and the cathode catalyst layer are provided with three-dimensional interpenetrating network structures. According to the invention, the utilization rate of the catalyst is improved by 30-50%, the mass transfer resistance is reduced by 40-60%, the interface contact is improved, the controllability of the preparation process is improved, the structural stability is enhanced, the power density of the direct ammonia fuel cell reaches 250-300mW / cm < 2 >, the performance retention rate after 5000 cycles can reach 85% or more, and the method has remarkable technical advantages and application prospects.

The invention relates to a membrane electrode and application thereof in deuterium-enriched water, and belongs to the field of clean energy development and utilization. The membrane electrode comprises a proton exchange membrane, an anode catalyst and a cathode catalyst, the anode catalyst is an iridium / iridium oxide catalyst with a three-dimensional porous network structure, and the cathode catalyst is a platinum-ruthenium alloy catalyst. The preparation method comprises the following steps: coating one side of the N117 proton exchange membrane with the anode catalyst, coating the other side of the N117 proton exchange membrane with the cathode catalyst, and then performing hot pressing to prepare the membrane electrode. The method comprises the following steps: assembling a membrane electrode into an electrolytic cell, and electrolyzing water by using the electrolytic cell to realize deuterium enrichment. The membrane electrode and the electrolytic cell are reasonable in design, the preparation process is simple and controllable, and the obtained product is high in efficiency and long in service life when used for enriching deuterium and facilitates industrial application.

The invention discloses a conductive layer coated ruthenium-doped beta-manganese dioxide catalyst and a preparation method and application thereof.The preparation method comprises the following steps that a manganese source, ruthenium trichloride trihydrate, an oxidizing agent and water are mixed, an obtained precursor solution is subjected to microwave synthesis, and the conductive layer coated ruthenium-doped beta-manganese dioxide catalyst is obtained. The obtained ruthenium-doped beta-manganese dioxide composite material, hydrochloric acid A and aniline are added into water, then hydrochloric acid B and ammonium persulfate are added, the obtained polyaniline-coated ruthenium-doped beta-manganese dioxide composite material is subjected to calcination treatment, and the conductive layer-coated ruthenium-doped beta-manganese dioxide catalyst is obtained. The conductive layer coated ruthenium-doped beta-manganese dioxide catalyst prepared by the invention has excellent catalytic activity and catalytic stability, and solves the problem of insufficient stability caused by high catalytic potential and catalyst dissolution in the test process of the anode catalyst of the proton exchange membrane electrolytic cell.

The application discloses an anode catalyst layer and a preparation method thereof and a membrane electrode, relates to the technical field of proton exchange membrane water electrolysis, and the anode catalyst layer is a single-layer structure and is prepared from an anode catalyst slurry after drying, the anode catalyst slurry comprises the following components in parts by weight: 0.05-10 parts of a polymer compound; 0.5-10 parts of an iridium catalyst; 0.5-12 parts of a perfluorosulfonic acid resin; and 5-120 parts of a solvent; wherein the polymer compound is used to form a reinforcing structure in the anode catalyst layer, the polymer compound comprises at least one of sodium hydroxymethyl cellulose, polyvinylidene fluoride, polyacrylic acid, polyimide or butadiene styrene rubber, and the mass of the polymer compound is 20-100% of the mass of the anode catalyst. By introducing the polymer compound, the mechanical performance and electrochemical performance of the membrane electrode can be improved.

The invention discloses an anion exchange membrane electrode and a preparation method and application thereof, and belongs to the technical field of new energy material and catalytic electrode preparation, the method comprises the following steps: S1, preparing an anode catalyst slurry comprising a hydrophobic covalent organic framework material, an anode catalyst, an anion exchange ionomer and a solvent; s2, preparing a cathode catalyst slurry of which the components comprise a cathode catalyst, an anion exchange ionomer and a solvent; and S3, respectively spraying or coating the anode catalyst slurry and the cathode catalyst slurry on two side surfaces of an anion exchange membrane or a gas diffusion layer, and carrying out heat treatment to obtain the anion exchange membrane electrode. The method provided by the invention can solve the problems of large gas-liquid-ion three-phase mass transfer resistance, easy shielding of active catalytic sites by ionomers and unbalanced water management in the membrane electrode assembly in the existing AEMWE device.

The invention discloses an alkaline electrode based on a nickel-based intermetallic compound as well as a preparation method and application of the alkaline electrode. The alkaline electrode comprises a composite diaphragm, a cathode and an anode, the surface of the composite diaphragm is zirconium oxide; the cathode is formed by mixing an MNi5 metal catalyst and ZrO2 in a gradient manner and then spraying the mixture on one side of the composite diaphragm, and M is Hf or Zr; and the anode is formed by mixing Ni-Fe oxide and ZrO2 in a gradient manner and then spraying the mixture on the other side of the composite diaphragm. The cathode of the alkaline electrode adopts an MNi5 metal catalyst, the cathode and anode catalysts are mixed with ZrO2 in a gradient manner and then sprayed on the two sides of the composite diaphragm to construct an integrated'electrode-diaphragm 'complex, and the catalytic activity and the electrolytic efficiency of the electrode are improved through improvement of a cathode catalytic material and an electrode structure.

The invention discloses a flux-based preparation method of metal organic gel, which is characterized in that a series of metal organic gel materials are prepared by controlling proportion and temperature by taking ferric salt and any other mixed metal salts and organic ligands as raw materials, and the metal organic gel materials are directly used as an anode catalyst of a methanol fuel cell. The synthesis method is simple, the reproducibility is good, batch production can be achieved, and the prepared metal organic gel has the excellent methanol fuel cell anodic oxidation performance.

The application discloses a PEM water electrolysis hydrogen production membrane electrode and a preparation method thereof, and relates to the technical field of water electrolysis hydrogen production. The PEM water electrolysis hydrogen production membrane electrode comprises a proton exchange membrane and cathode and anode catalyst layers located on both sides of the proton exchange membrane, wherein the cathode catalyst layer and the anode catalyst layer both comprise a catalyst, a perfluorosulfonic acid ionomer, a solvent and a perfluorosulfonic acid ionomer dispersion promoter; and the perfluorosulfonic acid ionomer dispersion promoter is at least one of dimethyl sulfoxide, tetrahydrofuran and N-methyl pyrrolidone. The PEM hydrogen production membrane electrode catalyst layer prepared by the application has the dispersion promoter of the ionomer added, the dispersion degree of the ionomer in the catalyst layer is increased, a good catalyst / ionomer microporous structure catalyst layer is constructed, the transmission resistance of the gas and water is reduced, and the performance of the membrane electrode is improved. The preparation method adopted by the application does not need special treatment process and equipment, is simple and fast in operation, and is easy to realize batch production.

The application discloses a preparation method of a molybdenum-nickel hydroxyl oxide catalyst and application thereof, and the preparation method comprises the following steps: firstly, a precursor MoNi LDH material is obtained through a hydrothermal reaction; and then, the MoNi LDH material is electrochemically oxidized to obtain the molybdenum-nickel hydroxyl oxide material; and the electrochemical oxidation time is 10-60 minutes. The molybdenum-nickel hydroxyl oxide material has excellent urea catalytic activity and stability. When the molybdenum-nickel hydroxyl oxide material is applied as an anode catalyst, urea removal and hydrogen peroxide preparation can be realized, the problem of activity reduction caused by the lack of OH- in a traditional electrocatalytic process is solved, the urea removal rate in water can reach 100%, 28 g / L of hydrogen peroxide is obtained at the same time, the Faraday efficiency of H2O2 generation is maintained at 80%-90%, the device can maintain stable urea removal and H2O2 generation performance in a long running time, the activity of the generated H2O2 is high, and the H2O2 can be used for Fenton treatment of sulfamethoxazole pollutants in water, and the removal rate of sulfamethoxazole is more than 90%.

The invention discloses a method for preparing a carbon-coated cobalt-cerium composite material by using rapid Joule heat, and belongs to the technical field of catalytic materials and hydrogen production by electrolyzing water. The method comprises the following steps: dissolving a cobalt source and a cerium source in a solvent to obtain a mixed metal salt precursor solution, and then uniformly dipping or dropwise adding the mixed metal salt precursor solution onto a cellulose-based porous carbon source precursor to obtain a supported precursor; and finally, placing the load type precursor at two ends of an electrode of a Joule thermal reaction device, and under a vacuum condition, applying instantaneous current to carry out Joule thermal shock treatment so as to prepare the CoCe-C composite material. The preparation process is extremely simple, the energy consumption is extremely low, expensive precious metal and complex equipment are not needed, the obtained CoCe-C material serves as an anode catalyst to be applied to a hydrazine oxidation auxiliary water electrolysis system, the excellent catalytic activity and stability are shown, the voltage of an electrolytic bath can be remarkably reduced, low-energy-consumption, efficient and safe hydrogen production is achieved, and the method is suitable for industrial production. Wide industrial application prospects are realized.

The invention relates to the technical field of hydrogen production by electrolyzing water, and provides a preparation method of anode catalyst slurry of PEM electrolyzed water, slurry and a catalytic layer.The preparation method comprises the steps that S1, an anode catalyst, a first ionomer and a first solvent are mixed and dispersed, and first catalyst slurry is obtained; s2, mixing and dispersing a dehydrogenation catalyst, a second ionomer and a second solvent to obtain second catalyst slurry; the dehydrogenation catalyst is a carbon-supported noble metal catalyst; and S3, mixing the first catalyst slurry and the second catalyst slurry, and carrying out homogenization treatment to obtain the anode catalyst slurry. The method has the advantages that the effects of improving uniformity, improving mass transfer and reducing hydrogen in oxygen are achieved at the same time through the cooperative arrangement of the adding of the hydrogen elimination additive, the slurry preparation process steps and the like, and the performance and the safety of the membrane electrode are improved.

The invention discloses a modified cobaltosic oxide catalyst and a preparation method and application thereof.The catalyst comprises a carrier foamed nickel, tungsten and chlorine co-doped cobaltosic oxide nanosheets W and Cl-Co3O4, the tungsten and chlorine co-doped cobaltosic oxide nanosheets W and the Cl-Co3O4 are loaded on the carrier, cobalt chloride and tungsten salt serve as precursors of the catalyst, and the tungsten and chlorine co-doped cobaltosic oxide nanosheets W and the Cl-Co3O4 are loaded on the carrier. The preparation method comprises the following steps: firstly, carrying out a hydrothermal reaction to obtain a nickel foam loaded tungsten-doped basic cobalt chloride nanosheet W-Co2 (OH) 3Cl2, and then carrying out in-situ conversion on the Co2 (OH) 3Cl2 into a nickel foam loaded tungsten and chlorine co-doped cobaltosic oxide nanosheet W, Cl-Co3O4 through calcination. According to the invention, chlorine and tungsten are introduced into cobaltosic oxide, so that the activity and stability of electrocatalytic oxygen evolution are improved, and the cobaltosic oxide is used as an anode catalyst for electrocatalytic seawater decomposition and has excellent activity and stability of electrocatalytic oxygen evolution.

The invention provides a preparation method of a tin-doped iridium dioxide anode catalyst, and belongs to the field of hydrogen production through water electrolysis. The preparation method comprises the following steps: dissolving an iridium trichloride raw material and a tin source in water, adding sodium hydroxide to adjust the pH value of the solution, fully stirring, transferring the stirred solution to a reaction kettle, heating to 120-160 DEG C, introducing oxygen to carry out pressurized oxidation, carrying out centrifugal filtration and washing on an oxidation product obtained after the reaction by using a sulfuric acid solution, deionized water and ethanol in sequence, and drying to obtain the iridium trichloride tin oxide. And obtaining an anode catalyst product. The tin-doped iridium dioxide catalyst is prepared in an aqueous solution system, the process is simple, the product performance is stable, the process is clean and free of pollution, and compared with a commercial catalyst, the overpotential of the obtained doped catalyst is reduced by 30 mV or above under the current density of 10 mA / cm < 2 >.

The invention belongs to the technical field of catalyst preparation and methanol fuel cells, and particularly relates to a Pt-based composite catalyst, a membrane electrode and a preparation method and application of the Pt-based composite catalyst and the membrane electrode. The preparation method of the Pt-based composite catalyst comprises the following steps: carrying out a hydrothermal reaction on graphene oxide, nickel salt and a nitrogen source under an alkaline condition, sequentially carrying out dipping treatment and reduction treatment on the obtained Ni (OH) 2 / NC material and a platinum source in water, mixing the obtained Pt / Ni (OH) 2 / NC material with polypyrrole and water, and carrying out ultrasonic treatment to obtain the Pt-based composite catalyst. And dispersing the obtained Pt / Ni (OH) 2-PPy / NC catalyst in a first mixed solution obtained by heating polyvinyl alcohol, glycerol, ethylene glycol, trehalose and water, and carrying out circulating freezing-unfreezing treatment to obtain the Pt-based composite catalyst. When the Pt-based composite catalyst provided by the invention is used as an anode catalyst of a membrane electrode, the low-temperature performance of a methanol fuel cell can be remarkably improved.

The invention relates to the field of novel energy conversion, and provides a construction method of an electrochemical device simulating artificial photosynthesis. Comprising the following steps: treating foamed nickel through a FeCl3 solution under the conditions of different concentrations and soaking durations, preparing an iron / nickel-based anode catalyst to separate out oxygen, and selecting foamed copper as a cathode catalyst to reduce carbon dioxide; the solar cell panel is used for converting light energy into electric energy to drive electro-catalytic reaction. According to the construction method of the electrochemical device simulating artificial photosynthesis, the solar panel is used for supplying power, and CO2 reduction reaction is catalyzed while water is electrolyzed. The equipment simulates artificial photosynthesis to realize conversion of water and CO2 into clean energy and low-carbon chemicals. By adopting a mode of combining solar power supply with electro-catalysis, the problems of low efficiency and poor stability of traditional photocatalysis are solved, and the cost of an existing electrochemical catalysis oxygen evolution reaction catalyst is reduced.

The invention relates to the field of fuel cell anode catalysts, in particular to a preparation method of a Pd / h-BNNSs / rGO composite catalyst for a direct ethanol fuel cell, which comprises the following steps: taking reduced graphene oxide (rGO) as a substrate and compounding 5-20% by mass of hexagonal boron nitride nanosheets (h-BNNSs) to form a composite carrier; palladium (Pd) nanoparticles accounting for 16 + / -0.5 wt% of the total mass of the catalyst are loaded on the catalyst; the preparation method mainly comprises the following steps: preparing graphene oxide (GO) by an improved Hummer method, carrying out ultrasonic dispersion on GO and h-BNNSs, carrying out hydrothermal reaction at 180 DEG C for 6 hours, carrying out freeze drying to prepare a composite carrier, and loading Pd by a NaBH4 reduction method. The catalyst shows excellent performance on ethanol electrooxidation in an alkaline medium, has an electrochemical active area up to 202.31 m < 2 > / g, peak current density (5.9 times of commercial Pd / C) of 5549.0 mA / mg, excellent stability that activity attenuation is only 50% after 300 cycles, and remarkably improved CO poisoning resistance (the Jf / Jb ratio reaches 1.35), and shows strong industrial application potential.

This invention relates to the field of functional materials technology, and discloses a ruthenium-based catalyst for the acidic oxygen evolution reaction (OER), its preparation method, and its application. The preparation method includes dissolving 100-200 parts by mass of RuCl3·H2O and 1-40 parts by mass of VCl3 in 20-60 parts by volume of anhydrous methanol, stirring to obtain a mixed solution; slowly adding hydrazine hydrate dropwise to the mixed solution, continuing stirring, centrifuging and filtering; washing alternately with anhydrous methanol and ultrapure water, freeze-drying, and heat-treating at 300-500℃ for 1-4 hours to obtain a V-doped RuO2 catalyst. The prepared V-RuO2 catalyst exhibits excellent initial activity and long-term durability under acidic conditions, providing a new solution for developing high-performance anode catalysts suitable for proton exchange membrane water electrolyzers.

The application relates to a high-conductivity and high-activity Ir@TiO2 anode catalyst, a preparation method and application thereof in a proton exchange membrane electrolytic cell, and belongs to the technical field of inorganic functional catalyst materials. The iridium source and the titanium source are mixed at room temperature, a reducing agent magnesium diboride is added, the mass ratio of the magnesium diboride and the iridium source is 2:1, the mass ratio of the titanium source and the iridium source is 1-100:1; then the mixture is placed in a high-temperature and high-pressure reaction kettle, and is reacted at 80-200 DEG C for 10 min-4 h, and the high-conductivity, high-activity and easily enlarged Ir@TiO2 anode catalyst is obtained after being reduced to room temperature. The obtained Ir@TiO2 anode catalyst is dispersed in a mixed solution of water and ethanol with a volume ratio of 1:1, is prepared into slurry, is prepared into a membrane electrode through a coating means, and is assembled in a PEM electrolytic cell, and when the iridium load is 0.5 mg / cm 2 , the high activity and stability are still maintained.

The present invention discloses a catalytic layer for a fuel cell and a preparation method thereof. The catalytic layer comprises an anode catalyst and a cathode catalyst. The anode catalytic layer comprises: a Pt-C catalyst, a high-dielectric small-molecule alcohol, sulfonated lignin-doped conductive polymer nanoparticles, a hydrophilic adhesive, an ionomer solution, and deionized water; the cathode catalytic layer comprises a catalyst, an ionomer solution, a high-dielectric small-molecule alcohol, polytetrafluoroethylene, and deionized water. The present invention can solve the technical problems of poor water management effect and poor conductivity of the water management materials used in current fuel cell catalytic layers. The preparation method is simple and convenient, greatly reducing the difficulty of preparation and the difficulty of operation for operators.

The embodiment of the invention discloses an anode gas diffusion layer and a preparation method thereof, an anode electrode and an electrolytic bath, the anode gas diffusion layer comprises a substrate, one side surface of the substrate comprises a hydrophilic region with hydrophilicity and a hydrophobic region with hydrophobicity, the hydrophilic region is arranged in the middle of the surface, and the hydrophobic region is arranged in the middle of the surface. And the hydrophobic region is arranged around the hydrophilic region. The periphery of the substrate has hydrophobicity, so that the hydrophobic area becomes a high-speed channel of oxygen, oxygen can be preferably guided out, retention and blockage of bubbles in a pore channel of the anode gas diffusion layer are reduced, and therefore the oxygen content in hydrogen and the electrolysis voltage are reduced; the middle part of the substrate has hydrophilicity, so that water can be transmitted through the anode gas diffusion layer, uniform distribution of the electrolyte can be promoted, bubble retention can be reduced, and the electrolyte can be continuously and uniformly supplied to the anode catalyst layer.

The invention discloses a composite anti-antipole anode catalyst layer based on a Pt catalyst loaded by carbon fiber as a carrier and a preparation method of the composite anti-antipole anode catalyst layer, and belongs to the field of new energy fuel cells. The composite anti-reverse anode catalyst layer comprises a carbon fiber loaded Pt catalyst and an OER catalyst; in the carbon fiber supported Pt catalyst, the diameter of the carbon fiber is 10 to 1000 nm. The carbon carrier adopted by the invention is carbon fiber, and the conductivity and mass transfer capacity of the carbon carrier are superior to those of a metal oxide carrier material. The carbon fiber treatment and Pt catalyst preparation processes are simple, no organic ligand is needed, the cost is low, and large-scale production is easy. According to the technical scheme adopted by the invention, the particle size of the OER catalyst is kept between 1 nm and 10 nm, and the utilization rate of the OER catalyst can be formed and improved when the OER catalyst and the carbon fiber supported Pt catalyst form a composite catalyst layer, so that the overall anti-reverse pole performance of the catalyst layer is improved.

A membrane electrode assembly for a fuel cell includes, in this order, a cathode catalyst layer, a solid polymer electrolyte membrane, and an anode catalyst layer. The cathode catalyst layer contains at least a catalyst and a highly oxygen-permeable ionomer. At least one selected from the group consisting of the cathode catalyst layer, the solid polymer electrolyte membrane, and the anode catalyst layer contains a nitrogen-containing multidentate ligand coordinatable to an iron ion.

Catalyst-coated ion-conducting membrane comprising an anode catalyst layer, a cathode catalyst layer and an ion-conducting membrane layer arranged between the anode catalyst layer and the cathode catalyst layer, wherein: the anode catalyst layer comprises an anode electrocatalyst and an ion-conducting polymer, wherein the anode electrocatalyst comprises particles of a platinum group metal or a platinum group metal alloy, and the anode electrocatalyst is present in the anode catalyst layer with a load of less than 0.20 mg of the platinum group metal per cm² of the anode catalyst layer;and the cathode catalyst layer comprises an ion-conducting polymer and a cathode electrocatalyst comprising platinum-containing particles and a carbon-based support, wherein the carbon-based support comprises individual primary particles or an aggregate of primary particles, the primary particles comprising pores, with some of the platinum-containing particles located within the pores and some of the platinum-containing particles located on an outer surface of the carbon-based support; wherein the platinum-containing particles on the outer surface of the carbon-based support have a mean average particle size of ≤3.0 nm; and wherein less than 50% of the surface area of ​​the platinum-containing particles is in contact with the ion-conducting polymer of the cathode catalyst layer.

The invention discloses a PEM water electrolysis membrane electrode assembly and a preparation method, and relates to the technical field of proton exchange membrane water electrolysis hydrogen production. The assembly comprises a cathode catalyst layer, an anode catalyst layer, a cathode gas diffusion layer, an anode gas diffusion layer, a frame film and an adhesive layer, and the adhesive layer contains UV curing adhesive and pressure-sensitive adhesive which are located between the edge of the catalyst layer and the gas diffusion layer and between the edge of the catalyst layer and the frame film and on the outer side of the frame film respectively. According to the preparation method, a continuous process is adopted, the catalyst layer is formed through intermittent coating, the gas diffusion layer and the frame film are positioned and attached by spraying the UV curing adhesive, the pressure-sensitive adhesive is sprayed after UV curing, and the negative electrode is prepared through repeated operation of turning over. Swelling of the proton exchange membrane can be inhibited, dislocation of a gas diffusion layer is avoided, the attaching sealing performance of the frame membrane is improved, the flatness and uniformity of the assembly are improved, the hydrogen leakage risk is reduced, and the method is suitable for efficient green hydrogen preparation.

Provided is a catalyst layer in which power generation performance is improved even in a high output power region (high current density region). A cathode catalyst layer (5) and an anode catalyst layer (6) for a membrane-electrode assembly of a solid polymer fuel cell, the cathode catalyst layer (5) and the anode catalyst layer (6) containing catalyst particles (1), an electrically conductive carrier (2), a polymer electrolyte (3), and a fibrous substance (4), the fibrous substance (4) containing at least one of an electron conductor and a proton conductor, the specific surface area of the fibrous substance (4) being in a range of 40 m 2 / g or more and 80 m 2 / g or less.

The invention provides a visual coplanar electrode electrolytic tank device and system, and relates to the technical field of electrolytic tanks, and the device comprises a first clamp, a transparent sealing assembly, a connecting assembly, an electrode assembly, a supporting piece and a second clamp which are stacked in sequence. The side, close to the first clamp, of the supporting piece is provided with a groove used for containing the electrode assembly and the electrolyte. The electrode assembly comprises a diaphragm, a cathode catalyst layer and an anode catalyst layer. The cathode catalyst layer and the anode catalyst layer are coplanar and arranged on the side, close to the first clamp, of the diaphragm at intervals. The cathode catalyst layer comprises a cathode active region and a cathode conductive region which are connected with each other, and the anode catalyst layer comprises an anode active region and an anode conductive region which are connected with each other. And the connecting assembly is used for connecting the cathode conductive region and the anode conductive region with an external circuit. The first clamp is provided with an observation window, and the observation window directly faces the cathode active area and the anode active area through the transparent sealing assembly. And the internal operation mechanism of the electrolytic tank is comprehensively and reliably studied through the observation window.

The utility model relates to a fuel cell membrane electrode with high stability and high catalytic performance, which comprises a proton exchange membrane, and gas diffusion layers are arranged on two sides of the proton exchange membrane. A cathode catalyst layer is arranged between one side of the proton exchange membrane and one gas diffusion layer, an anode catalyst layer is arranged between the other side of the proton exchange membrane and the other gas diffusion layer, the cathode catalyst layer comprises n pomegranate-structured cathode layers, the anode catalyst layer comprises n pomegranate-structured anode layers, and the number n of layers is greater than or equal to 3. Compared with the prior art at the cost of sacrificing the stability, the catalytic performance is improved on the basis of considering the stability and the process influence.