76results about How to "Improve electrocatalytic performance" patented technology

The invention discloses a composite additive for a vanadium electrolyte and a preparation method of the composite additive, and relates to the technical field of vanadium batteries. The composite additive is applied to the electrolyte of the vanadium battery, the electrolyte is a positive electrode electrolyte and a negative electrode electrolyte, the concentration of the vanadium electrolyte can be improved, precipitation and crystallization of vanadium ions can be inhibited, and meanwhile, the electrochemical activity of the vanadium battery can be improved. The composite additive comprises a mixture formed by a first component and a second component, the first component comprises at least one of a fluorine-containing compound, oxyacid and oxysalt, and the second component is a surfactant.

The invention discloses a preparation method of a high-entropy phosphide nanotube, which successfully prepares a nanotube phosphide with a high-entropy structure by adopting a hydrogen bond organic framework (HOF)-metal organic framework (MOF) template conversion method. In the preparation process of the material, a core-shell structure (HOF (MOF)) is firstly formed, the core gradually disappears through a diffusion mechanism, and finally, the material is converted into a hollow nanotube structure which is uniform and controllable in size. According to the hollow structure, the specific surface area is remarkably increased, more active sites are provided, the transmission path of reactant molecules is optimized, and the electro-catalytic performance is greatly improved. Besides, the overall tubular morphology of the material is uniform, the size is controllable, and compared with a traditional granular material, the specific surface area is remarkably increased, so that more reaction sites are exposed in the external environment, and the catalytic efficiency and the reaction rate of the material in an electro-catalytic reaction are greatly improved.

The invention discloses a preparation method of a copper-based catalyst capable of realizing industrial ampere-level current density, which comprises the following steps: (1) dissolving copper salt and an alkaline substance to form a mixed solution; (2) carrying out hydrothermal treatment on the mixed solution obtained in the step (1) to obtain a copper precursor; and (3) calcining the copper precursor prepared in the step (2) to obtain the copper-based catalyst. The invention also discloses the copper-based catalyst prepared by the preparation method and application of the copper-based catalyst in CO electro-reduction reaction. The preparation method provided by the invention is simple, convenient and efficient, and the prepared copper-based catalyst has high-activity CO electroreduction capacity when being applied to industrial ampere-level current density.

The invention belongs to the field of composite electrode preparation, and particularly relates to a high-current-carrying multiphase electrode with a vertical array type carbon nano catalyst layer and a controllable preparation method and application of the high-current-carrying multiphase electrode with the vertical array type carbon nano catalyst layer. The vertical array type carbon nano catalyst layers with different structural sizes (adjustable diameter and height) are synthesized by assisting a chemical vapor deposition method, and the multi-phase electrode with different functional layers is prepared on the carbon-based composite carrier through hot pressing. The high-current-carrying multi-phase electrode provided by the invention can realize the purpose of keeping high-electricity hydrogen peroxide production current efficiency under industrial-grade large current (300 mA / cm < 2 >). The composite electrode is mainly used for in-situ electrocatalytic production of hydrogen peroxide, and under the condition of industrial large current (300 mA / cm < 2 >), the concentration of hydrogen peroxide can reach 1-5 wt%, and the current efficiency can be maintained at 80-99%.

The invention discloses a catalyst for improving discharge performance of a metal fuel cell through phase change of a rare earth induced manganese-based material and a preparation method, tetravalent rare earth cerium is doped into the manganese-based material through a hydrothermal method, uniform combination of cerium and manganese dioxide is realized in the process, crystal phase transformation of manganese dioxide is successfully induced, and the discharge performance of the metal fuel cell is improved. Beta-phase MnO2 which is stable but poor in electro-catalytic performance is converted into alpha-phase MnO2 with higher activity and better conductivity. The phase change greatly improves the electrochemical activity of the material. The number of active sites is insufficient due to the compact crystal structure of the beta-phase MnO2, and the open structure of the alpha-phase MnO2 increases the surface area and the reaction active sites, so that the catalytic performance of the oxygen reduction reaction is optimized.

The invention provides a wastewater treatment method. The wastewater treatment method comprises the following steps: S1, acidifying wastewater, and mixing the acidified wastewater with activated carbon and persulfate for reaction to obtain acidified wastewater; and S2, inserting a cathode plate and an anode plate into the acidified wastewater, and then carrying out electrocatalytic reaction. According to the wastewater treatment method provided by the invention, organic pollutants in wastewater are degraded by coupling three-dimensional electrocatalytic oxidation with persulfate activation until the wastewater reaches the standard and is discharged.

The invention discloses a supported catalyst for acidic oxygen evolution reaction as well as a preparation method and application of the supported catalyst. The supported catalyst comprises a MnO2 nanofiber carrier and noble metal and / or noble metal oxide loaded on the surface of the carrier. The preparation method of the supported catalyst comprises the following steps: (1) dispersing a manganese source, ammonium persulfate and potassium sulfate in a first solvent, and carrying out a heating reaction to obtain MnO2 nanofibers; and (2) uniformly mixing the MnO2 nanofibers with a noble metal source dispersion liquid and molten salt, drying to obtain mixed powder, and calcining the mixed powder in an inert atmosphere to obtain the supported catalyst. The supported catalyst prepared by the method shows high catalytic activity under the condition of low noble metal loading capacity, the preparation cost of the catalyst is reduced, and the catalyst shows good durability under the specific morphology of the manganese dioxide carrier and the interaction between the manganese dioxide carrier and noble metal.

The invention discloses a high-performance MXene modified oxide electrolysis water electrode and application. A high-entropy oxide electrode loaded on a two-dimensional MXene material is prepared through a solvothermal method and annealing. Wherein the oxide contains five transition metals, namely Fe, Co, Ni, Cu and Mn, exists on the surface of the MXene material in the form of nanoparticles, and is connected through Van der Waals' force. The electrode shows good electrochemical activity and stability in alkaline and alkaline saline water media at the same time.

The invention provides a preparation method of a copper-doped nickel hydroxide self-supporting electroreduction nitrate catalyst. The preparation method comprises the following steps: ultrasonically washing foamed nickel with ethanol, diluted hydrochloric acid and ultrapure water respectively; and then transferring the treated foamed nickel to a polytetrafluoroethylene lining containing a hydrogen peroxide aqueous solution and copper salt, assembling a reaction kettle, finally putting the reaction kettle into a drying oven for reaction, cooling to room temperature, taking out the self-supporting catalyst, cleaning with water, and drying to obtain the copper-doped nickel hydroxide material. The preparation method of the catalyst is an innovative construction method of an electro-catalysis nitrate reduction catalyst, a brand-new catalysis strategy is provided for normal-temperature and normal-pressure electro-catalysis water body nitrate reduction synthesis of ammonia, meanwhile, the preparation process route of the catalyst is simple and easy to implement, high electro-catalysis performance is achieved, and the method is suitable for industrial production. Certain potential application prospects are realized.

The invention relates to the technical field of nano materials, in particular to a CoMo-BTNT anode, a preparation method and application thereof, and the preparation method comprises the following steps: preparing a Ti substrate; preparing a titanium dioxide nanotube array by using a Ti substrate; co-Mo oxide layer deposition liquid is deposited on the surface of TNA through a direct-current electrodeposition method, then annealing heat treatment is conducted, and CoMo-TNA is prepared; preparing a CoMo-BTNT anode by taking CoMo-TNA as a cathode and a Pt sheet as an anode; the invention also provides an application of the CoMo-BTNT anode in degradation of antibiotics in water. According to the invention, TNA is used as a base layer, an active CoMo oxide layer is deposited on the TNA base layer, the TNA base layer has good electrical conductivity and electro-catalytic performance, the electrical conductivity of the anode is improved, an effective electrically-assisted activated PMS degradation tetracycline system is constructed, and a new solution thought is provided for treatment of tetracycline wastewater.

The invention belongs to the technical field of electrochemical sensor functional materials. The invention particularly relates to a preparation method of a nitrogen-doped three-dimensional porous carbon-loaded petal-shaped molybdenum disulfide composite material, an obtained product and application. The nitrogen-doped three-dimensional porous carbon-loaded petal-shaped molybdenum disulfide composite material provided by the invention is a porous material and comprises the elements of C, N, S and Mo. The nitrogen-doped three-dimensional porous carbon has a multilevel porous three-dimensional network structure, Mo and S elements are loaded on the surface and inside the nitrogen-doped three-dimensional porous carbon, and the nitrogen-doped three-dimensional porous carbon mainly exists in the form of a MoS2 compound and is of a petal-shaped structure. Wherein strong metal-carrier interaction exists between the nitrogen-doped three-dimensional porous carbon and the MoS2. The nitrogen-doped three-dimensional porous carbon provided by the invention has a large specific surface area and excellent conductivity, so that the conductivity of the prepared composite material is improved, and the stacking problem of MoS2 is avoided. The generation of the petal-shaped MoS2 nanosheets is beneficial to shortening of a transfer route and promotion of rapid transmission and diffusion of electron ions. The strong metal-carrier interaction between the nitrogen-doped three-dimensional porous carbon and MoS2 can provide charge transfer, enhance the electro-catalytic performance, and facilitate electro-catalysis and distinguishing of electroactive biological micromolecules dopamine and uric acid.

The present invention discloses a Fe-N-C bifunctional catalyst and a preparation method and application thereof. The present invention adopts a synthesis strategy of calcination after a one-pot hydrothermal method, so that dianhydride and diamine are copolymerized with iron compounds while being connected and cyclized by hydrogen bonds, and the electrocatalytic performance and stability of the Fe-N-C oxygen reduction / oxygen evolution reaction bifunctional catalyst are improved by regulating hydrogen bonds. The bifunctional catalyst of the present invention shows excellent oxygen reduction / oxygen evolution reaction electrocatalytic performance under alkaline conditions, and has the advantages of simple preparation method, rich source of raw materials, easy industrial production, low cost, more uniform dispersion of iron elements, etc. Therefore, it has a wide range of application prospects in energy conversion devices such as fuel cells and metal-air batteries.

The electrochemical reaction device comprises a plurality of electrochemical reaction units which are sequentially connected in series; the electrochemical reaction unit comprises a vertical cylindrical first reaction part and a U-shaped cylindrical second reaction part; the upper end and the lower end of each electrochemical reaction unit are provided with connecting pieces connected with the screen plate, and the connecting pieces are used for fixing the outer electrode and the inner electrode and are hermetically connected with the first reaction part and the second reaction part; an automatic exhaust valve is arranged above the second reaction part connected in each electrochemical reaction unit; gas in the electrolysis system is discharged out of the reaction system; attachments on the surface of the electrode are easy to clean and convenient to disassemble; installation is simple and fast; catalytic layers for electro-catalytic reaction are prepared on the inner wall of the outer electrode and the outer wall of the inner electrode of each electrochemical reaction unit; and catalyst layer materials on the surfaces of the positive and negative electrodes can be timely repaired.

The invention discloses a high-performance stainless steel oxygen evolution electrode and its application. The electrode is prepared by the following steps: step 1: pre-treating the surface of the stainless steel to remove impurities on the surface; step 2: placing the stainless steel treated in step 1 in a chloride solution, using a constant current density method to use the stainless steel as an anode for anodic corrosion for 2 to 5 minutes, and then cleaning and drying the stainless steel to obtain an anodic corrosion stainless steel electrode; wherein the concentration of chloride in the chloride solution is 3 to 5 wt%, and the current density during anodic corrosion is 300 to 500 mA / cm 2 ; Step 3: placing the stainless steel electrode treated in step 2 in an alkaline solution, using the stainless steel as an anode for electrolysis, to obtain the stainless steel oxygen evolution electrode; wherein the concentration of the alkali in the alkaline solution is 1 to 2 mol / L, and the current density during electrolysis is 400 to 600 mA / cm 2 , the electrolysis time is 1 to 3 hours.

The invention relates to the technical field of electrocatalysis, in particular to an oxygen / sulfur heterostructure oxygen evolution electrocatalyst and a preparation method and application thereof. Based on an in-situ oxidation strategy, a CuFeO layer is generated on the surface of CuFeS, and the CuFeS-coated CuFeO high-performance oxygen evolution electrocatalyst with a heterostructure is obtained. By constructing a sulfide-oxide heterojunction, a built-in electric field can be formed at an interface to promote charge separation and transfer, so that the electrocatalytic activity is remarkably improved. And on the other hand, the CuFeO layer on the outer layer serves as an armor, and the problem of oxidation of the surface of CuFeS is solved. The electro-catalytic performance and the long-term stability are obviously improved.

The invention belongs to the technical field of electro-catalysis, and particularly discloses a Cu nanoparticle / acidified carbon nanotube catalyst and a preparation method and application thereof.According to the preparation method, acidified pretreated carbon nanotubes with good conductivity and high specific surface area are selected as a substrate, CuO nanoparticles are evenly loaded through a hydrothermal method, and the Cu nanoparticle / acidified carbon nanotube catalyst is obtained; and growing a zeolite imidazate framework material-8 (ZIF-8) on the surface of the CuO nanoparticle-loaded carbon nanotube in situ, and regulating the thickness of an ultrathin nitrogen-carbon layer on the surface and coordination of Cu-N by regulating the calcining temperature and time. According to the Cu nanoparticle / acidified carbon nanotube catalyst as well as the preparation method and the application thereof, the Cu nanoparticles are encapsulated in a confined manner, so that long-service-life electrically-driven CO2 is converted into a high-added-value C2 + product, catalytic active sites of the Cu nanoparticles are fully exposed, the charge transfer rate is increased, and the intrinsic activity of the Cu active sites is improved.

The present invention relates to an electrochemical sensor, a graphite foil electrode for monitoring carbendazim and a preparation method thereof, wherein the graphite foil electrode for monitoring carbendazim comprises: a graphite foil substrate and graphene nanosheets vertically and uprightly distributed on the surface of the graphite foil substrate, wherein the graphene nanosheets and the graphite foil substrate are seamlessly connected; the graphene nanosheets and the graphite foil substrate are prepared by electrochemical stripping of a piece of graphite foil; the oxygen content in the graphite foil electrode is 15%-25%; and the nitrogen content is 3%-10%. The beneficial effect is that the graphite foil electrode, as a self-supporting electrode, can be directly used as a working electrode of an electrochemical sensor. The cost of the raw material graphite foil is low, the preparation method of the graphite foil electrode is simple, the electrode has high reusability, and has good application prospects.

The invention discloses a NiSe2 / VN-C / C bifunctional electro-catalytic material and a preparation method and application thereof, the preparation method comprises the following steps: grinding a vanadium source and a nitrogen source in an agate mortar to uniformly mix the vanadium source and the nitrogen source, transferring the mixed powder into a porcelain boat, paving the porcelain boat in a tubular furnace, and keeping the temperature for 2 hours at 700-900 DEG C in an argon atmosphere to obtain black VN powder; taking a nickel source and selenium powder according to the molar ratio of the nickel source to the selenium source being 1: (1-2), taking VN according to the molar ratio of the nickel source to the vanadium source being 1: (0.8-2), adding the materials into an ethylene glycol solution, and uniformly stirring to obtain a mixed solution; transferring the mixed solution into a polytetrafluoroethylene lining of a high-pressure reaction kettle, putting a pretreated C / C composite material into the high-pressure reaction kettle, ensuring that the C / C composite material is immersed in the solution and is well sealed, finally putting the high-pressure reaction kettle into an electric forced air drying oven, carrying out solvothermal reaction, taking out and washing after the solvothermal reaction is finished, and sealing and airing at room temperature to obtain a NiSe2 / VN-C / C sample; the prepared NiSe2 / VN-C / C bifunctional electro-catalytic material is good in electro-catalytic performance, good in stability, simple in preparation method and controllable in morphology.

The present invention discloses a preparation method and application of a highly dispersed cobalt-modified nitrogen-sulfur co-doped hierarchical porous carbon composite material, belonging to the technical field of electrocatalytic materials. The preparation method comprises the following steps: sulfation-modifying chitosan to obtain positioned sulfonated chitosan; adding the positioned sulfonated chitosan to a Ca-containing 2+ and Co 2+ The method comprises the following steps: stirring the mixture evenly in a solution of 200 μm and 30 μm, aging the mixture to obtain a positioning chitosan sulfonate mixture; calcining the positioning chitosan sulfonate mixture under an inert atmosphere, and acid leaching the calcined product to obtain the highly dispersed cobalt-modified nitrogen-sulfur co-doped hierarchical porous carbon composite material. The highly dispersed cobalt-modified nitrogen-sulfur co-doped hierarchical porous carbon composite material provided by the present invention has a simple preparation process, good electrocatalytic activity and stability, and can be used as an electrocatalyst for secondary zinc-air batteries.

The present invention discloses a preparation and application of a CuS@NiCo‑LDHs hollow nano-octahedron heterojunction electrocatalyst. The preparation method comprises the following steps: using a Cu2O nano-octahedron as a hard template to undergo a precipitation conversion reaction with a soluble sulfide, growing a CuS shell layer on the surface of the Cu2O nano-octahedron, and obtaining a Cu2O@CuS nano-octahedron core-shell structure intermediate; etching the Cu2O@CuS nano-octahedron core-shell structure intermediate with an inorganic strong acid to remove the Cu2O core to obtain a CuS hollow nano-octahedron; heterogeneously growing a layer of NiCo‑LDHs nanosheets on the surface of the CuS hollow nano-octahedron to obtain the CuS@NiCo‑LDHs hollow nano-octahedron heterojunction electrocatalyst. The preparation method of the present invention is simple, the raw materials are abundant and easy to obtain, the time-consuming cycle is short, the product has high catalytic activity and good stability, and can be used for alkaline electrocatalytic oxygen evolution reaction.

The invention discloses the preparation and application of a modified graphite felt electrode loaded with copper-aluminum layered bimetallic oxide for use in a heterogeneous electro-Fenton system, and belongs to the technical field of electrochemical water treatment. The present invention uses heat-treated graphite felt as a matrix, disperses copper-aluminum bimetallic hydroxides on the surface of the heat-treated graphite felt by a hydrothermal method, and calcines at a high temperature under the condition of strong and continuous nitrogen gas flow, so as to obtain a modified graphite felt electrode with Cu2O and CuO as the main active components. Compared with the original graphite felt and the heat-treated graphite felt, when the modified graphite felt electrode loaded with copper-aluminum bimetallic oxide is used as the cathode material, the degradation efficiency of the heterogeneous electro-Fenton system for sulfamethoxazole wastewater is greatly improved, and the cathode has a low ion leaching rate, strong stability, and good application prospects.

The present invention provides a weakly conductive amino acid molecular imprinting polymer film electrochemical sensor and a preparation method thereof, and a ketamine detection method, belonging to the technical field of drug detection. The present invention uses amino acids as functional monomers and ketamine (KT) as template molecules to synthesize weakly conductive amino acids @KT-MIPs by electropolymerization. Due to the rich active sites and good electrochemical activity of amino acids, the polyamino acid film polymerized on the electrode surface exhibits excellent catalytic activity and biocompatibility. The polyamino acid film not only combines ketamine as a template molecule, but also improves the electrocatalytic performance of the ketamine detection electrode, and has specific recognition of ketamine, which can improve the accuracy of the detection results.

This invention belongs to the field of electrochemiluminescence materials technology, and discloses a gold-silver nanocluster, its preparation method, and its application in the electrochemiluminescence-electrochemical dual-mode detection of chloramphenicol. The preparation method involves adding a silver source solution to a gold source solution, then adding an alkaline thiol β-cyclodextrin solution to obtain a mixed solution. Sodium bicarbonate is added to adjust the pH to 8.2-8.4, followed by incubation to obtain a crude product of gold-silver nanoclusters. The crude product is then purified by centrifugation and dialyzed to obtain the gold-silver nanoclusters. Furthermore, this invention uses these gold-silver nanoclusters as an ECL luminescent material to construct a sensor and applies it to the quantitative detection of chloramphenicol. This sensor innovatively achieves synergistic detection of ECL and DPV dual signals, with mutually verifiable detection results, exhibiting high sensitivity, excellent selectivity, good stability, and excellent repeatability.

This invention discloses the application of an electrode material for reducing intracellular resistance genes in drug-resistant bacteria. A platinum-doped dendritic TiO2 nanowire structure based on a three-dimensional material is formed by growing a micron-sized TiO2 backbone array and platinum-doped nano-sized TiO2 branches on the surface of a porous electrode. The prepared dendritic nanowire three-dimensional electrode material has a larger specific surface area, providing more reactive sites and strong electric field sites. Platinum doping enhances the conductivity and electrocatalytic performance of the nanowires. Furthermore, by combining it with chloride salts / oxidants, the electroporation and electrocatalysis of the nanowire electrode surface are coupled. The strong electric field confined at the nanowire tip induces perforation of the drug-resistant bacterial cell structure, strengthening the contact and reaction between the oxidant and the resistance gene. The high electrocatalytic activity confined at the nanowire tip induces the generation of strong oxidizing free radicals, achieving the goal of destroying the drug-resistant bacterial cell structure and efficiently reducing intracellular resistance genes.

The invention discloses a hollow dahlia-shaped nickel-cobalt selenide composite electro-catalytic material and a synthesis method and application thereof.The hollow dahlia-shaped nickel-cobalt selenide composite electro-catalytic material is prepared by taking SiO2 spheres as a template and adopting a hydrothermal-solvothermal combination method, specifically, firstly, a nickel-silicon hydroxide precursor is prepared through a hydrothermal reaction method, and then the hollow dahlia-shaped nickel-cobalt selenide composite electro-catalytic material is prepared; the method is simple to operate, environment-friendly and energy-saving, the morphology and the structure are easy to control, then the NiSe / Co9Se8 hollow nanoflower composite material is prepared by adopting a solvothermal method, and the method can effectively inhibit oxidation and has the advantages of wide application range, easy control of the reaction process, low crystallization temperature and the like, so that the two methods are combined to accurately control crystal growth and a microstructure, and the method is suitable for large-scale production of the NiSe / Co9Se8 hollow nanoflower composite material. Therefore, the electrocatalyst with high activity, high stability and high specific surface area is prepared, and the electrocatalyst shows excellent HER and OER electro-catalysis performance under the alkaline condition.

This invention discloses a preparation process for titanium anodes used in electrolytic copper foil, relating to the field of anode plate manufacturing technology. In preparing the titanium anode for electrolytic copper foil, porous titanium is pretreated and then reacted sequentially with sodium hydroxide and chloroacetic acid to obtain nanowire titanium dioxide coated porous titanium; an iridium-tantalum pentoxide / titanium anode is prepared by mixing chloroiridium hexahydrate and tantalum ethoxide to form an iridium-tantalum pentoxide coating solution; polypyrrole is polymerized and coated onto graphene oxide to obtain polypyrrole-coated graphene oxide; a composite coating solution is prepared by reacting polypyrrole-coated graphene oxide, nickel chloride hexahydrate, and ferric chloride hexahydrate, followed by reduction with hydrazine hydrate; this composite coating solution is then coated onto the iridium-tantalum pentoxide / titanium anode to obtain the titanium anode for electrolytic copper foil. The titanium anode for electrolytic copper foil prepared by this invention exhibits excellent electrocatalytic performance and service life.

The invention discloses a nickel-copper diatomic catalyst and application thereof, the nickel element and the copper element in the nickel-copper diatomic catalyst are dispersed in a catalyst skeleton in an atomic scale, and the catalyst skeleton forms a metal organic framework with metal ions and organic ligands. The nickel-copper diatomic catalyst shows excellent catalytic performance in the application of preparing carbon monoxide through carbon dioxide electrocatalytic reduction, and has huge commercial application potential.

The preparation method of the carbon material catalytic electrode material provided by the present invention can form a core-shell structure in which the core is a metal-N-doped carbon core with a low surface work function and the shell is a MAX semiconducting phase, the core or small microsphere inside the core-shell structure has a low surface work function, forming a high catalytic carbon core, and can prevent the direct contact between the catalytic carbon core and the electrolyte, greatly reducing the shedding of metal-doped atoms and the occurrence of side reactions, the outer polymer large microsphere inherits the topological structure of the phenolic-phenolic amine-pyrrole polymer, can effectively regulate the carbonization reaction process of the conjugated skeleton, and the side chain carbon formed while the shell directly constructs a developed pore structure can further selectively adsorb and desorb the reactant, greatly improving the catalytic efficiency of the electrocatalytic material. Thereby, the catalytic electrode material finally prepared produces a large current density and a high Faraday efficiency at a low overpotential, and can ensure that the catalytic electrode material has high mechanical strength.

The application provides an electrocatalytic material and preparation and application thereof, and particularly relates to an electrocatalytic material which has an improvement effect on the oxygen evolution reaction in electrolysis of water, wherein the active component of the electrocatalytic material comprises NiO and La2O3, the molar ratio of Ni and La is (2-10):1; and the structure is a load type structure in which the spherical-like nanoparticles composed of NiO-La2O3 composite nanosheets are loaded on the surface of a foamed nickel, wherein the loading amount of the electrocatalytic material is 0.012-0.018 g / cm 2 , the electrocatalytic material has the characteristics of strong interaction between components and uniform wrapping on the foamed nickel skeleton, and belongs to the field of preparation of electrochemical catalytic materials. The application has the advantages that: the electrocatalytic material has a simple preparation process, mild conditions and low cost; the material can effectively reduce the overpotential of the oxygen evolution reaction; only 198 mV is needed to reach a current density of 10 mA cm ‑2 ; the charge transfer resistance is only 2.38 Omega; and the material can continuously and stably work for 200 hours in a strong alkali environment.

The invention discloses a cobalt-yttrium bimetal oxide / nitride electro-catalytic material, a preparation method thereof and application of the cobalt-yttrium bimetal oxide / nitride electro-catalytic material in hydrogen and oxygen production through water electrolysis. The preparation method comprises the following steps: 1, carrying out hydrophilic modification treatment on the carbon fiber cloth by using dielectric barrier discharge plasma; and 2, adding the carbon fiber cloth treated in the step 1 into a mixed solution containing cobalt nitrate (II), yttrium nitrate (III), ammonium fluoride and urea, and carrying out a hydrothermal reaction in a high-pressure reaction kettle to obtain the Y2O3 / YN-Co3O4 cobalt-yttrium bimetal oxide / nitride electro-catalytic material. In the Y2O3 / YN-Co3O4 cobalt yttrium bimetallic oxide / nitride electro-catalytic material, Y2O3 / YN-Co3O4 cobalt yttrium bimetallic oxide / nitride has a polyhedral micro-nano particle structure. The cobalt-yttrium bimetal oxide / nitride catalyst disclosed by the invention has excellent electrochemical stability and relatively low production cost, and the long-term use performance and stability of an electrode material are remarkably improved.