148 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 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.

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 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.

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.

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 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 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.

The present disclosure provides a novel positive electrode active material for a chloride ion battery, a method for manufacturing the same, a positive electrode mixture for a chloride ion battery comprising such a positive electrode active material, and a chloride ion battery comprising such a positive electrode mixture. The positive electrode active material for a chloride ion battery according to the present disclosure is strontium ruthenium oxide having a layered perovskite structure. A method for producing a positive electrode active material for a chloride ion battery according to the present disclosure comprises the steps of: (a) preparing a raw material mixture by mixing strontium carbonate and ruthenium oxide; (b) granulating the raw material mixture to form granules; and (c) firing the particles. The positive electrode mixture for a chloride ion battery according to the present disclosure contains the positive electrode active material for a chloride ion battery according to the present disclosure. The chloride ion battery of the present disclosure has a positive electrode active material layer, and the positive electrode active material layer contains the positive electrode mixture for the chloride ion battery of the present disclosure.

This invention relates to the field of energy storage device technology and provides a method for preparing a high-specific-capacitance hydrated ruthenium oxide cathode material, comprising the following steps: annealing RuO2·xH2O; preparing a slurry by mixing RuO2·xH2O powder with a binder and a conductive agent, stirring, coating it onto carbon paper, and vacuum drying; using a three-electrode system, with the dried carbon paper loaded with RuO2·xH2O powder as the working electrode, performing an activation process, wherein the activation method is one of constant current intermittent titration activation, cyclic voltammetry activation, and constant current charge-discharge activation. This invention also provides a high-specific-capacitance hydrated ruthenium oxide cathode material and its application. This invention lowers the annealing temperature, reducing some of the crystal water in the hydrated ruthenium oxide to a suitable level; then, by using electrochemical constant current intermittent titration cycles to reduce the crystallinity of the hydrated ruthenium oxide, electron transport and ion transport reach the most coordinated state, thereby improving the specific capacitance of the cathode material.

The present invention relates to a thick-film resistor comprising ruthenium oxide and glass, the ruthenium oxide having a rutile-type crystal structure, and having Lc / La of 0.6885 or more and a crystallite diameter of 10 nm to 80 nm (inclusive) when the lattice constant of the a-axis as measured by X-ray diffraction is La and the lattice constant of the c-axis as measured by X-ray diffraction is Lc.

The application relates to the technical field of new materials, in particular to a preparation method of a tungsten-doped ruthenium oxide nanoparticle electrocatalyst derived from a polyacid. 10 [alpha-SiW9O 34 ] (referred to as SiW9) is compounded with ruthenium chloride (RuCl3) through a "sugar bubble method" to obtain foamed glucose balls; after high-temperature heat treatment, tungsten-doped ruthenium oxide nanoparticles are obtained as an acidic electrolytic water oxygen evolution catalyst, and then the structure composition and electrocatalytic acidic oxygen evolution reaction (OER) performance of the catalyst are systematically studied. In the application, the polyacid precursor with a definite structure can effectively inhibit the agglomeration of ruthenium oxide during high-temperature treatment, so that more catalytic active sites are exposed; moreover, the W doping derived from the polyacid can not only effectively regulate the electronic structure of Ru sites but also inhibit the excessive oxidation of the Ru sites, so that the electrocatalytic OER activity and stability of the RuO2 are improved.

The invention discloses a nitrogen-doped ruthenium oxide loaded graphene electrocatalyst and a preparation method and application thereof, and belongs to the technical field of electrocatalysts.The preparation method comprises the steps that a nitrogen source, a ruthenium source and graphene are added into water, stirred and freeze-dried, and a precursor is obtained; and heating the precursor to 450-700 DEG C in an air atmosphere, and annealing to obtain the nitrogen-doped ruthenium oxide loaded graphene electrocatalyst. Ruthenium oxide particles are loaded on the surface of graphene, nitrogen is introduced at the same time, nano-sheet-loaded evenly-distributed small nano-particles are obtained, the specific surface area is large, more active sites are exposed, the atomic structure is further adjusted and optimized through introduction of the nitrogen, excessive oxidation of ruthenium oxide at an anode is inhibited, and the electrochemical performance of the anode is improved. Therefore, the electrocatalytic oxygen evolution performance and stability of ruthenium oxide are greatly improved.

The invention discloses a preparation method and application of a high-dispersion ruthenium-based catalyst. According to the disclosed scheme, a ruthenium precursor solution and carrier mixture system is treated by adopting a microwave hydrothermal method; the ruthenium oxide is gradually separated out from the precursor solution under the microwave hydrothermal condition and is uniformly loaded on the carrier; and finally, centrifuging, washing, drying and roasting to obtain the high-dispersion ruthenium-based catalyst. The catalyst is applied to hydrogen chloride catalytic oxidation reaction and shows good catalytic activity and stability. By organically combining a microwave field and a hydrothermal field, controllable synthesis of the ruthenium-based catalyst with high dispersion, small particle size and narrow distribution is realized. Meanwhile, the molecular vibration of the polar solution is accelerated under the microwave condition, the solution-carrier interface structure is obviously influenced, certain defects can be easily generated on the surface of the carrier, the directional anchoring of the ruthenium component is promoted in combination with the hydrothermal environment, and finally the stability of the ruthenium-based catalyst is easily improved.

The invention belongs to the technical field of electro-catalysis, and particularly relates to a Ti net substrate loaded manganese ruthenium oxide composite electrode material and a preparation method and application thereof.The preparation method mainly comprises the steps that a pretreated Ti net substrate is placed in an electrolyte containing manganese salt, acetate and sulfate, electro-deposition is conducted on the Ti net substrate, and the Ti net substrate loaded manganese ruthenium oxide composite electrode material is obtained; then putting into a muffle furnace for annealing to obtain Ti / MnOx; and then, soaking and drying in a ruthenium salt solution for multiple times, and annealing in a muffle furnace to obtain Ti / MnOx-RuOy. The preparation method has the advantages of simple and convenient process, mild reaction conditions and low cost, and the prepared composite electrode material has excellent acidic OER performance and stability when being used as a water electrolysis anode.

An example thin-film transistor includes a source including a body of ruthenium metal, a drain, a body of semiconductor channel material extending between the source and the drain, and a source-channel interface positioned between the source and the body of semiconductor channel material. The source-channel interface is in contact with the body of ruthenium metal of the source and the body of semiconductor channel material. The source-channel interface is formed of ruthenium oxide and has a root mean square roughness of less than or equal to 0.3 nm. Such a source-channel interface may be made using reactive sputtering or ozone oxidation.

The present invention relates to a process for the production of butanol from ethanol, the process comprising the following steps: (i) reaction of aqueous ethanol to acetaldehyde in the presence of a ruthenium oxide catalyst, (ii) reaction of the acetaldehyde formed to crotonaldehyde, (iii) reaction of the crotonaldehyde formed to butanol. In each of steps (i), (ii) and (iii) an aqueous phase is present.

The utility model discloses a vibration durability high-energy hybrid tantalum capacitor, which comprises a shell, a seat support, a tantalum core, an insulation structure and a cover plate, the seat support, the tantalum core, the insulation structure and the cover plate are sequentially arranged in the shell from bottom to top, the tantalum core is arranged in the seat support, a lead is arranged on the tantalum core, and the cover plate is respectively connected with the shell and the insulation structure. The lead is provided with a pipe sleeve and sequentially penetrates through the insulation structure and the cover plate to extend out of the shell. The first cathode piece is physically isolated from the bottom of the tantalum shell through the seat support, the cathode ruthenium dioxide plating layer is prevented from being damaged in the vibration process, meanwhile, due to the fact that the seat support is designed to be closed, the tantalum core is fixed, and meanwhile insulation between the tantalum core and the tantalum shell is achieved. The fluororubber insulation ring is adopted to replace a traditional insulation upper gasket and a PTFE insulation ring, the number of internal parts is reduced, the stress area of the insulation ring is increased, 70% compression amount is adopted for fluororubber materials, and the buffer space of longitudinal fixed stress is increased.

The invention provides a catalyst and a synthesis method of diethyltoluenediamine 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.