319 results about "Cathode catalyst" patented technology

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 the technical field of proton exchange membrane fuel cell cathode catalysts, and discloses a nanoscale high-entropy intermetallic compound catalyst and a preparation method and application thereof. According to the nanoscale high-entropy intermetallic compound catalyst, a nitrogen-doped porous carbon material derived from zeolite imidazole skeleton-8 is taken as a carrier, and the metal elements of a high-entropy intermetallic compound comprise platinum, copper, cobalt, nickel and iron or platinum, ruthenium, copper, cobalt, nickel and iron. The preparation method of the catalyst comprises the following steps: step 1, preparing a zeolite imidazole framework 8; 2, preparing and purifying a nitrogen-doped porous carbon material carrier; step 3, loading a metal precursor; and 4, preparing the nano-scale high-entropy intermetallic compound catalyst. Nanoscale, high dispersity and structure ordering of the high-entropy intermetallic compound are achieved, the high-entropy intermetallic compound serves as a PEMFC cathode catalyst, the ORR quality activity and durability can be remarkably improved, and Pt loading capacity and cost are effectively reduced.

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 discloses a fuel cell cathode catalyst and a preparation method thereof, and belongs to the technical field of fuel cells. The preparation method of the fuel cell cathode catalyst comprises the following steps: adding a modified multi-walled carbon nanotube into a chloroplatinic acid aqueous solution with the mass concentration of 5g / L, carrying out ultrasonic treatment at 30-50 DEG C for 1-2 hours, and then carrying out freeze drying; and putting the dry powder into a horizontal tube furnace, introducing inert gas as protective gas, heating to 450-500 DEG C, preserving heat for 1 hour, cooling to room temperature along with the furnace, and taking out to obtain the fuel cell cathode catalyst. The modified multi-walled carbon nanotube is MWCNT / PEI / 5-formyl-2-thiopheneboronic acid, and the 5-formyl-2-thiopheneboronic acid is grafted after the PEI is grafted on the surface of the MWCNT, so that the dispersity of the MWCNT can be obviously improved, the agglomeration phenomenon of the MWCNT is reduced, the dispersion is more uniform, the loading capacity of platinum is high, the electrocatalytic activity of the catalyst is obviously enhanced, and the dosage of platinum is reduced.

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 provides a CoCe-SNC catalyst and a preparation method and application thereof, and belongs to the technical field of hydrogen fuel cell / metal air cell cathode catalysts. The preparation method comprises the following steps: mixing and grinding a metal organic framework ZIF-8 and KSCN, carrying out first pyrolysis, compounding the obtained nitrogen and sulfur-containing co-doped carbon with two metal complexes Co-PM and Ce-PM, and carrying out second pyrolysis to obtain the CoCe-SNC diatomic catalyst. According to the invention, the two-dimensional lamellar structure carbon material and the asymmetric coordination diatomic metal are compounded, so that the catalytic performance of the whole catalyst is improved, and meanwhile, the yield of hydrogen peroxide generated by side reaction is reduced. The catalyst is applied to a hydrogen fuel cell / metal air cell, and the defects that in the prior art, a noble metal catalyst is high in cost, and a non-noble metal catalyst is low in catalytic activity, high in hydrogen peroxide yield, poor in catalyst stability and the like are overcome.

The application discloses a platinum-based high-entropy intermetallic compound and a preparation method and application thereof as a hydrogen fuel cell cathode catalyst, and belongs to the field of fuel cells.The preparation method comprises the following steps: S01, adding platinum salt, at least five other metal salts and a nitrogen-rich organic compound into an organic solvent, uniformly mixing, and obtaining a metal precursor mixed solution; S02, adding a carbon carrier into the metal precursor mixed solution, fully mixing, drying, collecting, and obtaining a precursor; and S03, heat treating the dried precursor under a reducing atmosphere, and performing heat preservation treatment, so as to obtain the platinum-based high-entropy intermetallic compound.The preparation method is simple, low in cost and good in repeatability, the prepared catalyst has the advantages of uniform particle size and high oxygen reduction activity, and has a good development prospect in the field of hydrogen fuel cell catalyst applications.

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 belongs to the technical field of lithium-carbon dioxide batteries, and particularly relates to a lithium-carbon dioxide battery positive electrode catalyst, a preparation method and a lithium-carbon dioxide battery. Comprising the following steps: taking iron, cobalt, nickel and copper as templates, respectively grinding and mixing with 1, 2, 4, 5,-tetracyanobenzene, sintering under a vacuum condition, respectively coordinating the 1, 2, 4, 5,-tetracyanobenzene with metal ions to form polymer monomers, and polymerizing the polymer monomers to form iron polyphthalocyanine, thereby obtaining the lithium-carbon dioxide battery positive electrode catalyst. The iron polyphthalocyanine is adopted as the positive electrode catalyst of the lithium-carbon dioxide battery, so that the generation of lithium oxalate is realized, the discharge voltage is improved to be higher than a theoretical value 3.01 V, the charging voltage is reduced, and the energy efficiency of the battery is improved.

A surface-modified catalyst, a multilayer cathode and a system for the electrochemical reduction of carbon dioxide in an acidic medium releasing protons are described. More particularly, the surface-modified catalyst, the multilayer cathode and the system comprise least one heterocyclic organic molecule preventing protons from accessing an active site on a surface of the cathode catalyst material to decrease an hydrogen evolution reaction, as compared to the absence of said heterocyclic organic molecule. The use of the surface-modified catalyst, the multilayer cathode and the system for the production of multicarbon products as well as their processes of manufacturing are also described. Finally, also described are methods for electrochemical production of a multicarbon product using the multilayer cathode and the system.

The invention belongs to the technical field of fuel cell membrane electrode preparation, and particularly discloses a preparation method for improving fuel cell catalyst layer ionomer distribution, which comprises the following steps: placing a carbon nanotube in dilute nitric acid, carrying out uniform ultrasonic dispersion, then carrying out oil bath heating, carrying out continuous acidification treatment, then carrying out suction filtration, and drying to obtain a carbon nanotube catalyst layer; carbon nano tube powder subjected to acidizing treatment is obtained; mixing the acidized carbon nanotube powder with a Nafion solution in proportion, and removing a solvent through rotary evaporation to obtain a carbon nanotube-Nafion compound; mixing the carbon nanotube-Nafion compound with a commercial Pt / C catalyst, deionized water and ethanol in proportion, and performing ultrasonic treatment under an ice bath condition to obtain uniformly dispersed cathode catalyst slurry; and spraying the uniformly dispersed cathode catalyst slurry on the cathode side of the proton exchange membrane to obtain the catalyst layer for improving ionomer distribution.

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 invention discloses a mercaptan-coated proton exchange membrane fuel cell cathode catalyst slurry, a preparation method and a membrane electrode, and the method comprises the following steps: step 1, dispersing carbon black in a water-alcohol solution and a surfactant to obtain a carbon black solution; 2, respectively preparing a platinum precursor solution and a cobalt precursor solution; 3, mixing the carbon black solution, the platinum precursor solution and the cobalt precursor solution, removing the solvent, and performing thermal reduction in reducing gas to obtain a binary ordered alloy catalyst; the temperature of the thermal reduction ranges from 700 DEG C to 1000 DEG C, and the time ranges from 0.5 h to 2 h. Step 4, dissolving the mercaptan powder in a mixed solvent of deionized water and isopropanol according to a ratio of 1: 1 to prepare a 1wt% mercaptan-containing solution; then, cooling the solution to 5 DEG C until solid substances are completely dissolved; and step 5, fully mixing the catalyst with the prepared mercaptan solution. And step 6, removing excessive mercaptan, and centrifuging the solution at the rotating speed of 10000 revolutions per minute for 10 minutes. And drying the precipitate in a vacuum drying oven for 12 hours to obtain the catalyst. The mercaptan-coated binary alloy catalyst prepared by the method can avoid poisoning effect of sulfonate radicals on Pt, improves expression of catalyst activity, and is helpful for improving performance of a fuel cell.

The invention provides a quantitative detection method for the average pressure of hydrogen in a PEM electrolyzed water cathode catalyst layer, and relates to the technical field of hydrogen production by electrolyzed water. The quantitative detection method comprises the following steps: carrying out a hydrolysis reaction in a PEM electrolytic cell, and calculating a hydrogen permeation flux N1 and a corresponding back pressure P1 under an electrolysis working condition; in another PEM electrolytic cell with the same structure, hydrogen is introduced into the cathode side, back pressure is applied to a cathode opening, meanwhile, inert gas is introduced into the anode side, an anode product channel is continuously purged, and the hydrogen permeation flux N2 under the hydrogen introduction working condition is calculated; gradually adjusting the back pressure under the hydrogen feeding working condition, repeating the step of testing the permeation flux under the hydrogen feeding working condition to obtain the hydrogen permeation flux under different back pressures, and drawing an N2-P2 curve; and determining a corresponding hydrogen back pressure value P2 when N1 is equal to N2, and calculating according to a formula deltaP = P2-P1 to obtain the average hydrogen pressure deltaP.

The application discloses a preparation method of Fe single-atom and Cu cluster co-doped nitrogen-carbon material and application of the material in full-pH oxygen reduction electrocatalysis. The ZIF-8 with a three-dimensional and rich pore structure is used as a framework, and Fe@ZIF-8 is prepared by using a solvothermal method. Then, copper acetylacetonate is used as a copper source, and the copper acetylacetonate molecules dispersed in the gas phase are adsorbed on the surface of the ZIF-8 by using the rich pore structure of the ZIF-8 and the low sublimation temperature of the metal acetylacetonate salt. Finally, pyrolysis is carried out under nitrogen or inert atmosphere, so as to form the Fe single-atom and Cu cluster co-doped nitrogen-carbon material. The material is subjected to electrochemical test under acidic, neutral and alkaline conditions, and the material exhibits high oxygen reduction electrocatalysis performance in the full-pH range and has good stability. The material has good performance as a cathode catalyst in a fuel cell, an alkaline / neutral zinc-air battery, and has high application value.

The application provides a Sn-doped Fe-N-C catalyst, a preparation method and application thereof. The catalyst comprises a carrier and Sn atoms and Fe atoms supported on the carrier, and the carrier is an N-doped carbon material. The application dopes the p-block metal Sn with stronger electronegativity into the Fe-N-C catalyst, forms an electron-withdrawing environment around the FeN4 site, reduces the electronegativity of the FeN4 site, and weakens the adsorption strength of the FeN4 site on the oxygen reduction intermediate. Meanwhile, the metal Sn is weaker in reactivity with hydrogen peroxide produced by the reaction of oxygen via a two-electron process than Fe, reduces the concentration of free radicals produced by the reaction, improves the stability of the carrier and active sites, and can effectively prevent the shedding of Fe. The application uses the catalyst as a cathode catalyst of a proton exchange membrane fuel cell, is low in cost, and can simultaneously meet the requirements of high catalytic activity and good stability.

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.

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.

This application discloses a cathode catalyst for aluminum-air batteries and its preparation method. The cathode catalyst comprises a carbon support and at least one platinum-containing multi-element alloy nanowire supported on the carbon support. The platinum-containing multi-element alloy nanowire contains Pt and at least two other transition metal elements, and the aspect ratio of the platinum-containing multi-element alloy nanowire is at least 10. The cathode catalyst of this application exhibits long-term durability under harsh electrochemical environments, higher catalytic activity of the active components, and is less prone to migration and aggregation, thereby solving the technical problems of high cost and poor stability of traditional Pt / C catalysts for aluminum-air batteries.

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.

The invention relates to the field of solid oxide fuel cells, and discloses a solid oxide fuel cell cathode modification method and a cell prepared by the same, and the method comprises the following steps: S1, obtaining a to-be-processed solid oxide fuel cell with a porous cathode skeleton; s2, preparing an impregnation liquid containing a lanthanide perovskite material precursor; s3, uniformly spraying the impregnation liquid to the surface of the porous cathode framework by adopting ultrasonic spraying equipment; s4, the sprayed solid oxide fuel cell is placed in a vacuum pump to be subjected to vacuumizing pretreatment; s5, first-stage heat treatment; s6, repeating the steps S3 to S5 until the mass loading capacity of the catalyst reaches a set value range; and S7, second-stage heat treatment is carried out, and in-situ formation of the cathode catalyst layer is completed. The method can realize uniform loading of the nano-catalyst, significantly improves the medium and low temperature performance of the battery, and is suitable for large-scale production.

This invention discloses a high-throughput electrocatalytic preparation apparatus for arsine and its usage method. The apparatus includes an anode electrolytic cell and cathode electrolytic cells on its left and right sides, respectively. Both the anode and cathode electrolytic cells are filled with acidic electrolyte and separated by a proton exchange membrane. The anode catalyst electrode in the anode electrolytic cell is connected to the positive terminal of a DC power supply; the cathode catalyst electrode in the cathode electrolytic cell is connected to the negative terminal of a DC power supply. An isolation valve and a cathode sludge receiving box are located at the lower end of the cathode electrolytic cell. This invention's equipment generates oxygen at the anode and arsine at the cathode through electrolysis. The principle is based on the reduction of elemental arsenic, which combines with hydrogen permeating through the proton exchange membrane to form arsine. This equipment has a simple structure and low cost. The design of dual cathode electrodes and their matching isolation valve and cathode sludge receiving box improves the efficiency of arsine production while reducing its cost, demonstrating significant application potential.

This invention discloses a method for preparing a cathode catalyst and positive electrode sheet for a neutral zinc-air battery, relating to the field of zinc-air batteries. The catalyst material is M-N-C (M being a transition metal). Nitrogen is dissociated by discharge in a nitrogen atmosphere using a plasma ball mill. Metal particles detach from the metal spheres composed of M under high-speed impact and are directly loaded onto a highly dispersed carbon substrate through electric field adsorption. The resulting mixture is then subjected to high-temperature heat treatment in a tube furnace under inert gas protection to obtain the target M-N-C catalyst material. When used as the cathode catalyst layer of a neutral zinc-air battery, the M-N-C catalyst material provided by this invention can effectively improve the reaction efficiency of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), reduce the overpotential of the zinc-air battery, improve the cycle stability of the neutral zinc-air battery, and increase its cycle life.

The application discloses a molybdenum monatomic anchored gamma-Fe2O3 photoelectric cathode catalyst, a preparation method of an electrode thereof and application of the catalyst to photoelectrocatalytic degradation of pollutants in water bodies. The molybdenum monatomic anchored gamma-Fe2O3 photoelectric cathode catalyst comprises a gamma-Fe2O3 carrier and molybdenum atoms anchored on the surface of the gamma-Fe2O3 carrier in the form of monatomic atoms, wherein the molybdenum atoms are anchored by replacing part of iron sites in the gamma-Fe2O3 crystal lattice. The preparation method comprises the following steps: mixing and impregnating a molybdenum precursor solution with gamma-Fe2O3, and evaporating dry; and performing twice calcination on the obtained solid to obtain the molybdenum monatomic anchored gamma-Fe2O3 photoelectric cathode catalyst; in the twice calcination, the first time calcination is performed at 250-350 DEG C in an oxygen-containing atmosphere, and the second time calcination is performed at 450-550 DEG C in an inert atmosphere.

The invention relates to the technical field of solid oxide electrolytic cells, and discloses an electrochemical reactor, application thereof, a method for preparing ethylene / carbon monoxide through methane / carbon dioxide electrochemical reforming and a catalyst. Wherein the electrochemical reactor comprises an anode, a cathode and an electrolyte layer arranged between the anode and the cathode, the anode comprises an anode carrier and an anode catalyst attached to the anode carrier, and the cathode comprises a cathode carrier and a cathode catalyst attached to the cathode carrier; the main components of the anode carrier and the cathode carrier are yttria-stabilized zirconium oxide, and the micro-channel structure is characterized in that the anode carrier and the cathode carrier are respectively provided with a micro-channel structure. The electrochemical reactor has the effects of improving Faraday efficiency, methane conversion rate and C2 and ethylene selectivity and reducing over-oxidation products CO and CO2 generated by an anode in a method for preparing ethylene / carbon monoxide through methane / carbon dioxide electrochemical reforming.

The invention relates to a fuel cell membrane electrode, a fuel cell system with the membrane electrode and electric equipment. The fuel cell membrane electrode includes a proton exchange membrane, and a cathode catalyst layer disposed on a cathode side of the proton exchange membrane. The fuel cell membrane electrode further comprises a cathode gas diffusion layer arranged on the outer side of the cathode catalyst layer, and the outer side surface of the cathode gas diffusion layer is provided with a first area in contact with the bipolar plate and a second area not in contact with the bipolar plate. Further, the fuel cell membrane electrode further includes a hydrophobic layer disposed outside the cathode gas diffusion layer, in which the hydrophobic layer has hydrophobic properties, and covers at least a portion of the second region. In this way, moisture in the membrane electrode can be retained, the performance of the fuel cell is improved, the service life of the fuel cell is prolonged, and cost can be saved.

A method for producing methane with excellent methane selectivity is provided. [Solution] A method for producing methane using a carbon dioxide electrolysis cell including a carbon dioxide reduction electrode and an electrolyte, wherein the carbon dioxide reduction electrode has, in that order, a cathode gas diffusion layer and a cathode catalyst layer that has been treated to be water repellent, and the method includes step A of supplying carbon dioxide from the cathode gas diffusion layer side and water from the electrolyte side to the cathode catalyst layer of the carbon dioxide reduction electrode in a temperature environment exceeding 0°C and not exceeding 50°C, and applying electricity.