195 results about "Ruthenium oxide" patented technology

The invention belongs to the technical field of electrocatalyst material preparation, and discloses a long-range disordered localized CoOOH ultrathin nanosheet electrocatalyst as well as a preparation method and application thereof, fluorine-doped cobalt selenide nanobelts prepared by a low-temperature annealing method are used as a base material, and the CoOOH ultrathin nanosheet electrocatalyst is prepared by in-situ reconstruction under an alkaline electrolyzed water anode oxygen evolution reaction condition. In the preparation process of the CoOOH ultrathin nanosheet provided by the invention, lattice cobalt is stabilized in the water electrolysis anode reconstruction process through fluorine ions with strong bonding action with cobalt ions, so that the long-range disordered structure of amorphous CoOOH generated after reconstruction is limited by localization, and the alkaline water electrolysis anode reaction performance is improved. The catalyst has activity and durability obviously superior to those of a commercial ruthenium oxide catalyst in industrial application of anion exchange membrane water electrolysis hydrogen production.

The invention belongs to the field of conductive paste preparation, and particularly discloses conductive paste containing ruthenium oxide and a preparation method of the conductive paste. The conductive paste is prepared from the following components in percentage by mass: 40 percent to 50 percent of ruthenium oxide, 3.8 percent to 5 percent of carbon nano tubes, 5 percent to 10 percent of PbO-B2O3-SiO2, 3 percent to 8 percent of ethyl cellulose, 21 percent to 28 percent of terpilenol, 9 percent to 12 percent of butyl carbitol, 0.7 percent to 1 percent of ammonium polyacrylate and 1 percent to 2 percent of dibutyl phthalate. According to the preparation method, ruthenium oxide is activated in vacuum, a mixed solvent is combined after dispersion, and a ball milling and ultrasonic dispersion synergistic process is adopted, so that the slurry is uniformly dispersed and has excellent stability. According to the invention, a ruthenium oxide-carbon nanotube-frit ternary synergistic system is constructed, and terpilenol and butyl carbitol in a specific mass ratio are taken as a mixed solvent, so that the problems of insufficient conductivity and easy agglomeration of traditional paste are effectively solved, and the method can be widely applied to manufacturing of high-precision electronic devices.

The invention provides a preparation method of a catalyst, the catalyst and a diethyltoluenediamine synthesis method based on the catalyst, and belongs to the technical field of chemical synthesis. After the surface of phosphoric acid modified zeolite is coated with aluminum oxide, a layer of quantum dot intercalation metal layered oxide is coated, the surface is modified by polydopamine, citric acid is coupled, cerium oxide and ruthenium oxide are loaded, and the catalyst is prepared. The prepared catalyst can well improve the conversion rate of toluenediamine, inhibit side reactions, improve the anti-coking capability, reduce the generation of carbon deposits, prevent the agglomeration of catalyst particles, prolong the service life, improve the mechanical strength and thermal stability, reduce the activation energy in the synthesis process of diethyltoluenediamine, make the reaction conditions milder, make the yield higher, and reduce the production cost. And the method can be repeatedly used and has a wide application prospect.

The invention relates to the technical field of electrocatalysts, and discloses a heterojunction catalyst composed of cobalt-copper co-doped ruthenium dioxide and metal ruthenium as well as a preparation method and application of the heterojunction catalyst. The preparation method comprises the following steps: carrying out hydrothermal reaction on cobalt salt and trimesic acid in a mixed solvent to prepare a cobalt metal organic framework precursor; a cobalt-copper bimetal organic framework is obtained through ion exchange of a copper salt solution; preparing a ruthenium-cobalt-copper ternary metal organic framework by adopting secondary ion exchange of a ruthenium salt solution; and carrying out air calcination treatment to obtain the cobalt-copper co-doped ruthenium dioxide and metal ruthenium heterojunction catalyst. According to the method, cobalt and copper atoms are uniformly doped in ruthenium dioxide crystal lattices through a step-by-step ion exchange strategy, and metal ruthenium nano-particles are grown on the surface in situ to form a heterogeneous interface. The obtained catalyst shows excellent performance in an acidic electrolyzed water anode oxygen evolution reaction, the overpotential is only 199 mV under the current density of 10 mA. Cm, and the stability can be maintained for 40 hours.

The invention relates to a noble metal catalyst derived from a metal organic framework, in particular to a ZIF-8-derived ruthenium elementary substance-ruthenium oxide-loaded catalyst as well as a preparation method and application thereof, and belongs to the technical field of advanced nonferrous metal materials, in particular to the field of noble metal nano catalytic materials. According to the invention, the zinc-based metal organic framework compound ZIF-8 is used as a precursor, the ruthenium-loaded elemental ruthenium-ruthenium oxide catalyst is controllably synthesized, and the catalytic activity and stability of the ruthenium oxide catalyst are effectively improved, so that the ruthenium oxide catalyst can be used as a high-activity and good-stability PEM electrolyzed water cathode / anode catalyst.

The invention discloses a preparation method and application of a rare earth element doped ruthenium oxide catalyst, and the preparation method comprises the following steps: (1) dissolving a rare earth metal salt, a ruthenium metal salt, dopamine hydrochloride and a Tris-HCl buffer agent in water to obtain a mixed solution, and carrying out in-situ polymerization reaction, solid-liquid separation and drying to obtain a powder precursor; and (2) carrying out high-temperature calcination on the powder precursor obtained in the step (1) to obtain the rare earth doped ruthenium oxide catalyst. Rare earth metal salt and ruthenium salt precursors are dispersed on an in-situ constructed porous carbon substrate, and the rare earth element doped ruthenium oxide nanosheet is generated by oxidation under a high-temperature condition through a self-sacrifice template method. The method has the characteristics of high efficiency and no pollution. The rare earth element doped ruthenium oxide disclosed by the invention is used as a catalyst for the anodic reaction of the acidic electrolyzed water, and shows excellent catalytic activity and wide application prospect.

A manganese-doped ruthenium dioxide nanofiber material, a preparation method thereof, and an application thereof in alkaline electrocatalytic hydrogen evolution and oxygen evolution at industrial-level current intensity belong to the technical field of controllable preparation of doped metal oxide nanomaterials. In the present invention, a manganese-doped ruthenium dioxide nanofiber material is prepared by two steps of electrospinning technology and calcination in an air atmosphere. The material exists in a uniform fiber morphology as a whole, and the surface is rough. This method is simple and efficient and can be applied to large-scale industrialization. The manganese-doped ruthenium dioxide nanofiber material prepared in the present invention, as a bifunctional electrocatalyst for electrocatalytic water splitting, exhibits excellent hydrogen evolution and oxygen evolution catalytic activities and stability at industrial-level current density, realizes the efficient and stable preparation of clean and green hydrogen energy, solves the disadvantages of low catalyst activity and poor stability in current industry, and provides an efficient solution to the increasingly serious environmental problems, having high practical application and economic value.

The invention provides an iridium-ruthenium oxide composite catalyst, a preparation method thereof and a proton exchange membrane water electrolysis device, and relates to the field of hydrogen production through water electrolysis. The preparation method of the iridium-ruthenium oxide composite catalyst comprises the following steps: mixing sodium nitrate, ruthenium chloride and water to prepare a mixed solution, and then drying and grinding to obtain a mixture; placing the mixture on the surface of nickel foil, carrying out first heating by using Joule heating equipment, and then cooling to obtain ruthenium oxide; mixing ruthenium oxide, hexadecyl trimethyl ammonium bromide and ethylene glycol, and performing ultrasonic dispersion to obtain a ruthenium oxide solution; and mixing the ruthenium oxide solution, H2IrCl6 and potassium hydroxide, adjusting the pH value of the system to be alkaline, then carrying out second heating until reflux and constant-temperature reaction, carrying out solid-liquid separation on the reaction product, and washing to obtain the iridium-ruthenium oxide composite catalyst. The iridium-ruthenium oxide composite catalyst provided by the invention has high activity, high stability and high water electrolysis efficiency.

The invention belongs to the technical field of water electrolysis hydrogen production catalysis, and particularly relates to a ruthenium molybdenum oxide nanorod electrocatalyst, a preparation method and application. In the electrocatalyst, the molar ratio of Mo to Ru is 1: 1-1: 9, and Mo atoms enter ruthenium oxide crystal lattices in the form of replacing Ru atoms; the method comprises the following steps: adding ammonium-containing molybdenum salt and NaNO3 crystals into a ruthenium salt solution, drying, grinding, calcining in air, cooling, and washing with deionized water to remove the NaNO3 crystals to obtain the electrocatalyst. According to the preparation method of the electrocatalyst, the problems of poor stability, high cost, complicated preparation and the like in the preparation process of an anode end catalyst in a proton exchange membrane water electrolysis hydrogen production technology are solved, the prepared electrocatalyst presents an ultra-small nanorod morphology, and a large number of edge and corner sites are generated for an oxygen production reaction; the Ru-O coordination structure of the electrocatalyst is in an unsaturated state, the Ru-O covalent interaction is significantly weakened, the introduction of Mo with low electronegativity inhibits the excessive oxidation of the electrocatalyst, and the oxygen production stability is high.

The invention relates to the technical field of thick-film resistors, and discloses a high-sheet-resistance resistor paste, a preparation method thereof and a thick-film circuit. The resistance paste comprises 6%-24% of a composite conductive phase, 33%-57% of an inorganic binding phase, 2%-6% of a modifier and 22%-38% of an organic carrier. The conductive phase comprises nano-scale / submicron-scale ruthenium dioxide powder and submicron-scale flake silver powder, and the conductivity and the stability are cooperatively guaranteed. According to the preparation method, a secondary dispersing and grinding process is adopted, and a finished product is obtained through coarse grinding, vacuumizing fine grinding and 800-mesh filtering. The thick film circuit adopts an N-group parallel architecture, so that the use amount of conductive phases can be greatly reduced. The problem that traditional slurry is poor in stability under high sheet resistance is solved, TCR is smaller than or equal to 100 ppm / DEG C, resistance precision is within + / -5%, temperature and humidity stability is excellent, cost is low, and the slurry is suitable for high-precision heating scenes such as a new energy automobile heating system.

The invention relates to a cerium-tungsten co-doped ruthenium oxide catalyst capable of balancing lattice oxygen consumption and filling as well as a preparation method and application of the cerium-tungsten co-doped ruthenium oxide catalyst. According to the preparation method, LOM reaction is activated under a W-RuO2 stable framework by simultaneously utilizing a bridging effect of an AEM-OER catalyst and a promoting effect of CeOx on lattice oxygen vacancy filling, so that consumption and filling of lattice oxygen are balanced, dual optimization of stability and high activity of RuO2 in OER can be realized, and the preparation method is suitable for industrial production. The method effectively overcomes the defects that the technology for improving the stability of RuO2 by purely using W doping is at the cost of sacrificing activity and the technology for activating the lattice oxygen of RuO2 by purely using Ce doping is at the cost of sacrificing stability, and realizes dynamic balance of lattice oxygen consumption and supplement, so that the OER reaction of the LOM mechanism is stably operated, and the stability of the RuO2 is improved. The traditional technical bottleneck that activity and stability cannot be considered at the same time is broken through.

A method includes forming a semiconductor region, forming a gate spacer over the semiconductor region, forming a source / drain region aside of the semiconductor region, wherein the source / drain region is of p-type, and forming a gate dielectric over the semiconductor region. The gate dielectric is formed in a space between opposing portions of the gate spacer. A ruthenium oxide layer is formed over the gate dielectric, and acts as a part of a work-function layer of a gate electrode. The method further includes incorporating silicon into the ruthenium oxide layer.

The application discloses a Ru-RE2O3 catalyst and a preparation method and application thereof, and the Ru-RE2O3 catalyst comprises a rare earth metal oxide RE2O3 shell and Ru inside. The catalyst is prepared from a carbon sphere carrier, a ruthenium salt and a rare earth metal salt through first calcination and second calcination. The first calcination is used for converting the ruthenium salt and the rare earth metal salt into corresponding oxides, and the second calcination is carried out under a reducing protective gas atmosphere, and the ruthenium oxide is selectively reduced, so that the Ru-RE2O3 catalyst with a core-shell structure is finally obtained. Compared with existing catalysts, the catalyst of the application forms a heterojunction between ruthenium and rare earth oxides and is uniformly loaded on the surface of the carbon sphere, the utilization rate of active sites is high, and the catalyst exhibits excellent water electrolysis catalytic activity, good mass transfer efficiency and stable cycle performance.

The invention relates to a method for electrochemically hydrogenating isophorone in a divided cell using H2O as a hydrogen source and in the presence of H2SO4 in anolyte and catholyte, wherein a pure-material electrode made of a material selected from graphite, nickel, and steel is used as the cathode and an electrode selected from solid-body and supported electrodes having an active material selected from platinum, graphite, boron-doped diamond, ruthenium oxide, platinum oxide, and / or iridium oxide is used as the anode.

The invention discloses an air electrode with an integrated structure as well as a preparation method and application thereof, and belongs to the technical field of zinc-air batteries. The preparation method comprises the following steps: dissolving polyvinyl alcohol in distilled water to prepare a polyvinyl alcohol aqueous solution; sequentially adding potassium hydroxide and zinc acetate into the polyvinyl alcohol aqueous solution, stirring and dissolving to prepare a gel electrolyte solution; freezing and unfreezing the gel electrolyte solution, and repeating for a plurality of times to prepare a PVA gel electrolyte; adding a carbon nanotube into a polyvinyl alcohol aqueous solution to prepare a carbon nanotube-PVA precursor solution, sucking the carbon nanotube-PVA precursor solution, dropwise adding the carbon nanotube-PVA precursor solution onto the PVA gel electrolyte, freezing and then unfreezing, and repeating for a plurality of times to prepare an integrated air electrode carrier; platinum carbon and ruthenium oxide are wetted with absolute ethyl alcohol, then polytetrafluoroethylene emulsion is added, grinding is performed to form a film, and a transparent film-shaped catalyst is prepared; and coating the transparent film-shaped catalyst on the upper surface of the integrated air electrode carrier to prepare the air electrode with an integrated structure. The technical problems of cathode overflow, catalyst loss and poor interface compatibility existing in an air electrode of an existing zinc-air battery can be solved.

An active cathode material for a chloride-ion battery according to the present invention is a strontium ruthenium oxide with a layered perovskite structure. A process for producing an active cathode material according to the present invention comprises (a) preparing a raw material mixture by mixing strontium carbonate and ruthenium oxide, (b) pelletizing the raw material mixture into pellets, and (c) firing the pellets. A cathode composite material for a chloride-ion battery according to the present invention comprises the active cathode material according to the present invention. The chloride-ion battery according to the present invention comprises a layer of active cathode material, and the layer of active cathode material contains the cathode composite material according to the present invention.

This invention relates to the field of biomass degradation technology, specifically to a ruthenium-based catalyst Ru@RuO2 supported by zirconium phosphate, its preparation method, and its application in catalyzing the hydrogenolysis of lignin. This invention is based on the in-situ reduction of elemental ruthenium to needle-like ruthenium oxide supported by amorphous zirconium phosphate, constructing a RuO2 / zirconium phosphate composite nanomaterial. This material can efficiently catalyze the hydrogenolysis of alkali-degraded lignin and model compounds such as α-O-4 and 4-O-5. Furthermore, the ruthenium nanoparticles generated from the in-situ reduction on ruthenium oxide exhibit high stability and can be reused multiple times.

The present invention discloses a neutral zinc-air fiber battery and a preparation method thereof, belonging to the technical field of batteries. Aiming at the problem in the prior art that due to too large bending stiffness, bending causes poor charge and discharge effects, the present invention provides a neutral zinc-air fiber battery and a preparation method thereof, which are assembled in a coaxial structure by a carbon nanotube / zinc powder composite fiber negative electrode, a double-layer gel electrolyte, and a platinum / ruthenium oxide modified carbon nanotube film positive electrode. The method steps are as follows: preparing a carbon nanotube / zinc powder composite fiber; preparing an organic gel electrolyte; preparing a hydrogel electrolyte precursor, and in-situ gelating the hydrogel electrolyte precursor on the composite fiber after curing with the organic gel electrolyte to obtain a fiber negative electrode wrapped with a double-layer gel; winding the platinum / ruthenium oxide nanoparticle modified carbon nanotube film positive electrode around the fiber negative electrode wrapped with the double-layer gel. It has a small bending stiffness and has a good charge and discharge curve for different degrees of bending.

The application relates to a ruthenium oxide oxygen evolution catalyst with a surface presenting a conical protruding structure and a preparation method and application thereof. The preparation method of the ruthenium oxide oxygen evolution catalyst with the surface presenting the conical protruding structure comprises the following steps: (1) mixing a RuCl3 solution and a urea solution and performing normal-pressure heating, performing suction filtration, washing, and drying to obtain a ruthenium precursor; (2) performing programmed temperature calcination on the ruthenium precursor, and obtaining the ruthenium oxide oxygen evolution catalyst with the surface presenting the conical protruding structure after cooling.

This invention discloses a method for preparing ruthenium oxide nanoparticles. The method includes: Step 1, using ruthenium acetate as a raw material, a certain amount is added to acetic acid to prepare a ruthenium acetate solution, and excess concentrated ammonia is added to the ruthenium acetate solution. The mixture is stirred to react and obtain a ruthenium hydroxide suspension. Step 2, the ruthenium hydroxide suspension is uniformly passed into a high-temperature centrifugal drying device. The ruthenium hydroxide suspension is dried and decomposed in the drying chamber to obtain ruthenium oxide nanoparticles. This invention uses acetic acid as a solvent, which allows for complete dissolution of ruthenium acetate, increases the ruthenium content in the solution, and increases the final ruthenium oxide yield. Simultaneously, the addition of excess concentrated ammonia ensures that all ruthenium ions in the solution can form suspended ruthenium hydroxide particles. Furthermore, centrifugal drying prevents the agglomeration of ruthenium hydroxide during its conversion to ruthenium oxide, while also improving the yield and quantity of ruthenium oxide, ultimately obtaining ruthenium oxide nanoparticles. The ruthenium oxide nanoparticles prepared by this invention have advantages such as high purity and small particle size, making them suitable for the preparation of various resistive components and industrial catalysis. At the same time, the preparation process has the advantages of simplicity, high yield, and ease of industrial production.

This invention discloses a method for preparing an electrically pulsed perovskite oxygen evolution reaction (OER) catalyst. The method involves overlapping electrodes on both sides of an SRIO thin film prepared from strontium nitrate, ruthenium oxide, and iridium oxide. Under an argon atmosphere, the SRIO thin film is subjected to a 2-second electrical pulse treatment via an external voltage source, with an electric field strength of 40 V / cm. This invention utilizes ruthenium oxide and iridium oxide powders as ruthenium and iridium sources, making it easier to obtain high-purity SRIO@E catalysts. This provides significant guidance for the synthesis of noble metal-based perovskite materials. Through a simple and easy-to-implement electrical pulse treatment strategy, this invention can remove some oxygen atoms from the catalyst, increasing the number of unpaired electrons available for the catalytic reaction and improving reaction activity. Furthermore, this electrical pulse treatment strategy is simple and controllable, has universal applicability, and is expected to meet the needs of industrial production.

The invention discloses a preparation method of a high-reliability high-voltage non-solid tantalum capacitor. The preparation method specifically comprises the following steps: step 1, preparing an electrolyte A and an electrolyte B; step 2, assembling and welding a tantalum shell, a tantalum cover, a tantalum core, a polytetrafluoroethylene diaphragm, a gasket, a diaphragm and a ruthenium oxide sheet, and injecting an electrolyte A to fill the residual space in the whole tantalum block; 3, opening aging is carried out on the capacitor at normal temperature, aging gas is pumped out, the electrolyte A is supplemented to fill the capacitor again, then the capacitor is transferred to a drying oven, opening aging is carried out at high temperature, and aging gas is pumped out; 4, putting the capacitor into a drying oven, discharging free electrolyte in the capacitor through heating, taking out the capacitor, naturally cooling to room temperature, injecting electrolyte B, and welding a liquid injection port; and step 5, carrying out high and low temperature performance test on the welded capacitor, and screening to obtain the high-reliability high-voltage non-solid tantalum capacitor. The tantalum capacitor prepared by the invention has the characteristics of high-voltage resistance, high-temperature resistance and low impedance.

A cathode active material for a chloride-ion battery according to the present disclosure is a strontium ruthenium oxide having a layered perovskite structure. A method for producing a cathode active material according to the present disclosure includes (a) preparing a raw material mixture by mixing strontium carbonate and ruthenium oxide, (b) pelletizing the raw material mixture into pellets, and (c) firing the pellets. A cathode composite material for a chloride-ion battery according to the present disclosure includes the cathode active material according to the present disclosure. The chloride-ion battery according to the present disclosure includes a cathode active material layer, and also the cathode active material layer contains the cathode composite material according to the present disclosure.

The invention belongs to the technical field of electro-catalytic materials, and particularly relates to a preparation method of a selenium-doped ruthenium oxide catalyst with oxygen vacancy spatial distribution regulated and controlled by urea and application of the selenium-doped ruthenium oxide catalyst in a proton exchange membrane water electrolysis device. Ruthenium trichloride, selenium powder and urea are mixed and ground, the mixture is heated to 500 DEG C in air, heat preservation is carried out for 3 hours, and calcination is carried out. The activity of the obtained Ur-Se-RuOx of which the oxygen vacancy is far away from the selenium doping atom in an acidic OER is obviously superior to that of Se-RuOx, the voltage is only 1.62 V under 1A cm <-2 > in a PEMWE test, and the Ur-Se-RuOx can stably run for more than 1000 hours under 200 mA cm <-2 >. According to the invention, controllable adjustment of oxygen vacancy space distribution in the element-doped metal oxide is realized for the first time, the problem of insufficient stability of traditional element-doped RuO2 is solved, and the method has the advantages of cheap raw materials, simple process and easy industrialization.

The application discloses a preparation method of a ruthenium oxide doped molybdenum oxide / nickel hydroxide full-pH electrolytic water catalyst, and belongs to the technical field of catalyst material preparation. The preparation method of the ruthenium oxide doped molybdenum oxide / nickel hydroxide comprises the following steps: firstly, mixing a molybdenum salt with a sodium dodecyl benzene sulfonate aqueous solution, and then placing the mixture into a foamed nickel base; subsequently, performing a hydrothermal reaction, and then performing a calcination treatment in a reducing atmosphere; finally, immersing the calcination product into a RuCl3 solution to obtain a self-supported heterojunction catalyst RuOx-MoO3 / Ni(OH)2. Through the composite structure design of the transition metal molybdenum / nickel base material and the noble metal ruthenium oxide cluster, the technical bottleneck of low activity and poor stability of the traditional ruthenium-based catalyst is effectively solved. The obtained catalyst exhibits excellent hydrogen evolution reaction (HER) activity and long-term stability in a wide pH range.

The present invention relates to an electrode for electrolysis having a coating layer containing a ruthenium oxide, a platinum group oxide, and a manganese oxide. The electrode for electrolysis of the present invention is characterized by exhibiting excellent durability and an improved overvoltage since a tin oxide contained in a coating layer interacts with a ruthenium oxide and a platinum group oxide which are contained together to improve electrical conductivity.

Embodiments of the disclosure are directed to methods of removing metal oxide from a substrate surface by exposing the substrate surface to a hydrogen (H2) plasma and pulses of RF. In some embodiments, the substrate surface has at least one feature thereon, the at least one feature defining a trench having a top surface, a bottom surface, and two opposed sidewalls. The hydrogen (H2) plasma and pulses of RF remove substantially all of the metal oxide, e.g., tungsten oxide (WOx), molybdenum oxide (MoOx), or ruthenium oxide (RuOx), from the substrate surface, without damaging the dielectric and / or critical dimension (CD) / profile of the structure. A metal fill can then be selectively deposited in the trench.

The invention relates to the technical field of new energy materials, and discloses a supercapacitor electrode material which comprises the following components in parts by mass: 35-45 parts of a carbon material; 8-12 parts of a metal oxide; 15-25 parts of a conductive polymer; 2-6 parts of a binder; 13-22 parts of a conductive additive; 0.2 to 0.6 part of a surfactant; 0.05 to 0.1 part of a dopant; the preparation method comprises the following steps: pretreating the materials, mixing and stirring under set conditions to obtain mixed slurry, coating the surface of an electrode substrate with the mixed slurry, and carrying out curing treatment to obtain a final electrode. The graphene sheets and the molybdenum disulfide cooperatively work in the material-filler to form a heterojunction structure, so that the conductivity and the ion transmission performance of the electrode material are improved, and the performance of the electrode material is improved. And the specific capacitance, the energy density, the power density and the cycling stability of the supercapacitor electrode material are effectively improved.

The invention discloses an electrolyzed water catalyst and a preparation method and application thereof, and the electrolyzed water catalyst comprises iridium oxide (IrOx) and / or ruthenium oxide (RuOx), xlt; 2, the catalyst has a stable lattice structure and a nano-scale particle size; the preparation method comprises the following steps: introducing fuel gas and an oxidizing agent into a flame burner, and igniting for combustion; and controlling the volume flow ratio of the fuel gas to the oxidant, forming a reducing atmosphere in the combustion chamber, introducing an iridium-containing or ruthenium-containing compound solution into the combustion chamber in a spraying manner, carrying out a combustion reaction to generate iridium oxide (IrOx) or ruthenium oxide (RuOx), and collecting a product after the combustion reaction to obtain the electrolyzed water catalyst. Through the mode, the electrolyzed water catalyst disclosed by the invention realizes high activity and excellent stability, and the preparation process is simple in process, good in repeatability, efficient, green and environment-friendly, and high in product quality; the electrolytic water membrane electrode using the catalyst provided by the invention realizes perfect combination of high-efficiency hydrogen production and ultra-long service life.

The application discloses a kind of doped diamond-ruthenium oxide composite coating electrode preparation method and its application, including substrate and electrode working layer being arranged on the surface of substrate, the electrode working layer is double-layer film structure, from below to above, in order to doped diamond film layer and ruthenium oxide film layer, doped diamond particles are added in the ruthenium oxide film layer.This kind of composite coating electrode combines the advantages of oxide coating electrode and doped diamond electrode, while having heterojunction effect, with good conductivity, corrosion resistance and mechanical strength, can be used for electrocatalytic wastewater degradation, chemical battery positive light weight grid, electrochemical synthesis, electric signal detection, tail gas treatment and other related electrochemical fields.