234 results about "Anode catalyst" patented technology

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 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 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.

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.

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.

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 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.

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.

The utility model relates to the technical field of electro-catalysis ammonia production, in particular to an electrolysis device for ammonia production by alkaline electrolysis of nitrate, which comprises a plurality of electrolysis units and end plates positioned at two ends, the plurality of electrolysis units are overlapped between the two groups of end plates, an anode plate is arranged between the left end plate and the electrolysis unit, and a cathode plate is arranged between the right end plate and the electrolysis unit. A cathode plate is arranged between the right side end plate and the electrolysis unit, and electrode terminals are fixedly arranged on the upper sides of the anode plate and the cathode plate; the electrolysis unit is composed of two sets of bipolar electrode plates, two sets of partition plates and electrolysis cavity grooves, the two sets of partition plates are arranged between the two sets of bipolar electrode plates, the electrolysis cavity grooves are formed in the two sets of partition plates, a diaphragm is arranged between the two sets of partition plates, an anode catalyst layer is arranged on the left side of the diaphragm, and a cathode catalyst layer is arranged on the right side of the diaphragm. According to the utility model, the copper / oxygen double-defect Cu2O-coated Cu heterojunction catalytic electrode is adopted, so that the catalytic activity and selectivity are improved, the energy consumption and the cost are reduced, and a new technical path is provided for green low-carbon ammonia synthesis.

The application belongs to the technical field of new energy materials and electrochemical catalysis, and provides an oxygen vacancy-rich nitrogen-doped nickel phosphide / cerium oxide composite catalyst, a preparation method and application thereof. A foam nickel is used as a working electrode, a platinum sheet is used as a counter electrode, and a Hg / HgO electrode is used as a reference electrode. In an electrolyte solution containing a nickel salt and a cerium salt, electrodeposition is performed to obtain a precursor. The precursor includes the foam nickel and cerium and nickel deposited on the foam nickel. The precursor is soaked in a tannic acid solution to obtain an impregnated precursor. Ammonium hypophosphite is placed upstream, and the impregnated precursor placed downstream is subjected to phosphorus nitride doping treatment to obtain the oxygen vacancy-rich nitrogen-doped nickel phosphide / cerium oxide composite catalyst. The obtained oxygen vacancy-rich nitrogen-doped nickel phosphide / cerium oxide composite catalyst exhibits excellent electrocatalytic performance for methanol oxidation reaction (MOR) and can be used as a high-efficiency anode catalyst for a direct methanol fuel cell (DMFC).

The invention belongs to the technical field of fuel cells, and particularly relates to a PEM fuel cell membrane electrode and a preparation method thereof. The preparation method of the PEM fuel cell membrane electrode provided by the invention comprises the following steps: preparing composite hydrophilic resin and composite hydrophobic resin, preparing cathode first catalyst layer slurry by adopting the composite hydrophilic resin, and controlling the spraying rate to obtain a cathode first catalyst layer of which the content of the composite hydrophilic resin is gradually changed; preparing cathode second catalyst layer slurry by adopting composite hydrophobic resin, controlling the spraying rate to obtain a cathode second catalyst layer with gradually changed composite hydrophobic resin content, and performing transfer printing and hot pressing on the cathode first catalyst layer, the cathode second catalyst layer, the anode catalyst layer and a proton membrane to obtain a membrane electrode, wherein the content of the composite hydrophilic resin in the first catalyst layer of the cathode is uniformly reduced from top to bottom along the gravity direction, and the content of the composite hydrophobic resin in the second catalyst layer of the cathode is uniformly increased from top to bottom along the gravity direction.

The invention provides a preparation method and application of a novel rare earth doped ferronickel-based alkaline electrolytic water anode catalyst, a substrate of the electrolytic water catalyst is foam iron, and the electrolytic water catalyst does not contain noble metal elements. The electrolyzed water catalyst not only avoids the use of noble metal, but also reduces the use of foamed nickel (the market price of nickel is much higher than that of iron), and has a great advantage in cost.

The invention provides a gas diffusion electrode device for electrochemical lithium-mediated ammonia synthesis and an electrochemical ammonia synthesis method, and belongs to the technical field of electrochemical ammonia synthesis. The gas diffusion electrode device comprises a nitrogen runner, a sealing gasket, a working electrode, a catholyte chamber, a diaphragm, an anolyte chamber, an anode catalyst, a hydrogen runner and an electrolyte, the electrolyte comprises a lithium salt, an organic solvent, a proton shuttling agent and an interface additive. According to the invention, high nitrogen transmission is realized by adopting a circulating type gas diffusion electrode device, and a three-phase interface chemical environment of gas, electrolyte and the gas diffusion electrode is regulated and controlled by an interface additive, so that the ammonia production rate and the Faraday efficiency are remarkably improved, and continuous and efficient nitrogen reduction reaction is realized at normal temperature and normal pressure.

The invention belongs to the technical field of hydrogen fuel cells, and particularly relates to an anode catalyst layer applied to a fuel cell and a preparation method and application of the anode catalyst layer. The anode catalyst layer for the fuel cell comprises a water electrolysis layer and a hydroxide layer which are overlapped, and the hydroxide layer is in contact with a proton exchange membrane of the fuel cell; the water electrolysis layer comprises a water electrolysis catalyst, carbon powder and first perfluorinated sulfonic acid resin; the hydroxide layer comprises a hydroxide reaction catalyst and second perfluorinated sulfonic acid resin; the ion exchange equivalent EW1 of the first perfluorinated sulfonic acid resin is less than or equal to the ion exchange equivalent EW2 of the second perfluorinated sulfonic acid resin. The anode catalyst layer for the fuel cell has the beneficial effects that through the gradient design of the hydrophilic and hydrophobic properties of the water electrolysis layer and the hydroxide layer, the antipole resistance of the anode catalyst layer is remarkably improved, the performance attenuation degree after antipole is reduced, and the service life of the fuel cell is prolonged.

The invention relates to an electrochemical selective oxidation method of butanone, which is carried out in an electrolysis system and specifically comprises the following steps: (1) an anode chamber of the electrolysis system comprises an anode electrolyte and an anode electrode, and the surface of the anode electrode comprises an anode catalyst; and (2) mixed gas of O2 and butanone is introduced into a cathode chamber of the electrolysis system, two-electron redox reaction is carried out on the surface of a cathode catalyst of a cathode electrode to reduce O2 into H2O2, the generated H2O2 and butanone react on the interface of the cathode catalyst, a target organic compound is selectively generated, and the cathode catalyst comprises a carbon-based material. The invention aims to solve the three core problems of poor selectivity, serious pollution and low safety in the traditional butanone oxidation process, and compared with the traditional strong oxidation process, the method adopts an electrochemical synthesis path, takes electrons as a cleaning reagent, realizes high-precision selective control on the butanone oxidation path, can directionally generate a high-value product, and has the advantages of high product yield and high product quality. And the problems of complex product and difficult separation in the traditional process are fundamentally avoided.

The invention discloses a low-energy-consumption solid fuel cell type oxygen sensor and a preparation method thereof. The low-energy-consumption solid fuel cell type oxygen sensor comprises a membrane electrode component, and the membrane electrode component comprises a first conductive substrate, an anode catalyst layer, a solid electrolyte layer, a cathode catalyst layer and a second conductive substrate which are sequentially stacked. The solid electrolyte layer is used for separating the anode catalyst layer and the cathode catalyst layer and conducting protons, a preparation material of the anode catalyst layer and a preparation material of the cathode catalyst layer respectively comprise carrier materials loaded with catalytic metal particles, and the anode catalyst layer is used for carrying out oxidation reaction; and the cathode catalyst layer is used for oxygen to generate electrochemical reduction reaction. The low-energy-consumption solid-state fuel cell type oxygen sensor is free of an external power supply, all-solid-state, long in service life and high in stability.

The invention discloses a phosphorus-doped composite photo-anode catalyst for regulating and controlling a Co3O4 / Fe2O3 electronic structure as well as a preparation method and application of the phosphorus-doped composite photo-anode catalyst, and belongs to the technical field of hydrogen production by photoelectrochemical decomposition of water. The preparation method comprises the following steps that a Fe2O3 photo-anode is immersed in a ZIF-67 precursor solution, ZIF-67 is deposited in situ, and then a Co3O4 / Fe2O3 p-n heterojunction is obtained through calcination; and finally, carrying out annealing treatment by taking sodium hypophosphite as a phosphorus source in an inert atmosphere to realize phosphorus doping of Co3O4. According to the invention, the Co3O4 / Fe2O3 p-n heterojunction photoanode derived from ZIF-67 is prepared, and the electronic structure of Co3O4 is further modulated through P doping. Wherein an embedded electric field generated by the Co3O4 / Fe2O3 p-n heterojunction effectively promotes the rapid transfer of interface charges; p doping further adjusts the electronic structure of Co3O4, so that the energy barrier of the oxygen evolution reaction (OER) rate determination step is reduced, and the OER kinetics is accelerated; the synergistic effect of p-n heterojunction and electronic structure modulation significantly improves the water oxidation activity of Fe2O3.

Described herein are gas diffusion anodes, electrolytic systems comprising such anodes, as well as methods of using such systems. A gas diffusion anode comprises a current collector, an anode porous base, an anode catalyst layer, and an anode-liquid interfacing layer. During the operation, the anode gas chamber receives hydrogen gas, which flows through the current collector into the anode porous base. The anode porous base provides uniform distribution of the hydrogen gas as well as uniform current density. The anode catalyst layer converts the hydrogen gas into protons and returns electrons, through the anode porous base, to the current collector. Protons are transported by the anode-liquid interfacing layer to an anolyte. This layer also blocks the anolyte from contacting the anode catalyst layer. The anode porous base, anode catalyst layer, and anode-liquid interfacing layer help to prevent the migration of the anolyte into an anode gas chamber.

The invention provides a preparation method of a titanium dioxide carrier based on ionic liquid regulation and control and a PEM electrolyzed water anode catalyst, and belongs to the technical field of PEM electrolyzed water hydrogen production. Titanium dioxide with a specific morphology is prepared by adopting a hydrothermal method under the assistance of the ionic liquid, the conductivity of the titanium dioxide is improved, under the condition that the dosage of precious metal is low, the supported precious metal iridium catalyst is superior to a commercial iridium black catalyst in the aspect of PEM electrolyzed water anode reaction activity, and excellent durability is shown; and the energy conversion efficiency is obviously improved. The method is simple and convenient to operate, and has huge market requirements and application prospects in the fields of electro-catalysis technology, petrochemical engineering and the like.

The application discloses a kind of one-step two-stage hot-pressing transfer printing preparation membrane electrode method.It includes the following steps:S1, cathode catalyst slurry is coated to first transfer substrate to form cathode catalytic layer, and anode catalyst slurry is coated to second transfer substrate to form anode catalytic layer;S2, first paving layer, second transfer substrate formed with anode catalytic layer, proton exchange membrane, first transfer substrate formed with cathode catalytic layer and second paving layer are sequentially stacked and paved on hot press, first hot-pressing treatment, second hot-pressing treatment are sequentially executed, and the cathode catalytic layer and anode catalytic layer are arranged close to the proton exchange membrane;Wherein, the processing pressure of the first hot-pressing treatment is less than the processing pressure of second hot-pressing treatment, and the processing time of the first hot-pressing treatment is greater than or equal to the processing time of second hot-pressing treatment.The method of the application can improve the transfer printing rate of catalytic layer, while retaining the initial pore structure of catalytic layer to the greatest extent, and improve the peak power density of membrane electrode.

The application relates to the electrolysis field and discloses a catalyst-coated membrane assembly manufacturing method and an electrolysis module, wherein the catalyst-coated membrane assembly manufacturing method comprises the following steps: activating the surface of a proton exchange membrane, so that the surface of the proton exchange membrane is formed with first active groups; modifying catalyst slurry, so that the catalyst slurry is formed with second active groups, the second active groups are complementary to the first active groups; transferring the modified catalyst slurry from a transfer film to the two sides of the activated proton exchange membrane, and forming an anode catalyst layer and a cathode catalyst layer on the two sides of the proton exchange membrane respectively. The application realizes the close combination of catalyst active sites and mass transfer channels, greatly reduces the interface impedance, enables higher current density under the same working voltage, significantly improves the utilization rate of the catalyst, greatly improves the hydrogen production rate of the formed electrolysis module, and shortens the waiting time required for reaching the target hydrogen concentration in the civil hydrogen production scene.

This invention relates to the field of fuel cell technology, specifically a method for preparing a membrane electrode including an anode catalyst layer that induces water distribution. The method includes the following steps: a water-isopropanol mixture is mixed as a solvent, and a hydrophobically treated platinum-based catalyst and ion exchange resin are added and pre-dispersed to obtain an intermediate slurry; a hydrophilic carbon fiber (CF)-supported anti-reverse electrode agent, IrO2 / CF, is added to the pre-ground slurry for secondary dispersion to obtain a final slurry; the final slurry is coated onto a PTFE substrate and dried to obtain an anode catalyst layer; a commercial catalyst and ion exchange resin are mixed in a water-alcohol solvent, dispersed to obtain a cathode slurry, coated onto a PTFE substrate, and dried to obtain a cathode catalyst layer; the catalyst layer is transferred to both sides of a proton exchange membrane to obtain a membrane electrode. This invention can drive liquid water away from the platinum active region and distribute it in a large-pore hydrophilic region with excellent mass transfer conditions formed by IrO2 / CF, providing liquid water not only for anti-reverse electrode but also preventing damage to the Pt / C electrochemical active region from low-temperature freezing.

The present embodiment is a fuel cell including at least a membrane electrode assembly including an electrolyte membrane, an anode catalyst layer disposed on one surface of the electrolyte membrane, and a cathode catalyst layer disposed on the other surface of the electrolyte membrane, wherein the cathode catalyst layer includes at least an electrochemical oxygen reduction electrode catalyst including a catalyst metal having oxygen reduction activity and a modifier that modifies the catalyst metal, wherein the modifier is at least one selected from a nitrogen-containing cyclic organic compound and a polymer thereof, and includes a decomposition inhibitor that suppresses decomposition of the modifier in at least one selected from an electrolyte membrane, an anode catalyst layer, and a cathode catalyst layer.

The invention relates to the technical field of new energy materials, in particular to a trimetal iridium-based anode catalyst and a preparation method and application thereof. The preparation method comprises the following steps: dissolving iridium salt, lead salt and ruthenium salt in a hydrochloric acid solution, adding a carbon carrier, and carrying out pretreatment to obtain precursor powder; the precursor powder is alloyed in a reducing atmosphere, and carbon-supported uniformly-distributed trimetal nanocrystalline powder is obtained; and annealing and oxidizing the trimetal nanocrystalline powder in an oxidizing atmosphere to obtain a trimetal iridium-based oxide in which iridium, lead and ruthenium are uniformly distributed, namely the trimetal iridium-based anode catalyst. According to the preparation method, the iridium salt, the lead salt and the ruthenium salt are dissolved with the hydrochloric acid solution and added into the carbon carrier, then alloying and annealing oxidation are performed to prepare the uniformly-distributed three-metal iridium-based oxide, the preparation process is simple, production can be effectively expanded, and low-iridium-load and stable high-current-density operation can be achieved.

The invention provides anode dehydrogenation catalyst slurry, a preparation method of the anode dehydrogenation catalyst slurry, a membrane electrode and a water electrolysis hydrogen production device. The anode dehydrogenation catalyst slurry comprises an anode catalyst, a dehydrogenation catalyst, electrolyte resin, alcohol and water, wherein the absolute value of the zeta potential value of the anode dehydrogenation catalyst slurry is greater than or equal to 60mV. The anode dehydrogenation catalyst slurry contains the dehydrogenation catalyst, the anode dehydrogenation catalyst slurry is used for preparing the anode catalyst layer of the membrane electrode of the water electrolysis hydrogen production device, the anode side dehydrogenation purpose can be achieved, the purity of anode side oxygen is improved, the amount of the anode side oxygen diffused to the cathode side can be reduced, and the purity of cathode side hydrogen is improved. Furthermore, by controlling the zeta potential value of the anode dehydrogenation catalyst slurry, the stability and uniformity of the slurry can be ensured, so that the action effects of the dehydrogenation catalyst and the anode catalyst are further improved, and the comprehensive performance of the membrane electrode prepared from the dehydrogenation catalyst and the anode catalyst is obviously improved.