211 results about "Ruthenium dioxide" patented technology

The present invention generally provides an apparatus and method for selectively forming a metallized feature, such as an electrical interconnect feature, on a electrically insulating surface of a substrate. The present invention also provides a method of forming a mechanically robust, adherent, oxidation resistant conductive layer selectively over either a defined pattern or as a conformal blanket film. Embodiments of the invention also generally provide a new chemistry, process, and apparatus to provide discrete or blanket electrochemically or electrolessly platable ruthenium or ruthenium dioxide containing adhesion and initiation layers. In general, aspects of the present invention can be used for flat panel display processing, semiconductor processing, solar cell device processing, or any other substrate processing, being particularly well suited for the application of stable adherent coating on glass as well as flexible plastic substrates. This invention may be especially useful for the formation of electrical interconnects on the surface of flat panel display or solar cell type substrates where the line sizes are generally larger than semiconductor devices or where the formed feature are not generally as dense.

Apparatus and method for generating ruthenium tetraoxide in situ for use in vapor deposition, e.g., atomic layer deposition (ALD), of ruthenium-containing films on microelectronic device substrates. The ruthenium tetraoxide can be generated on demand by reaction of ruthenium or ruthenium dioxide with an oxic gas such as oxygen or ozone. In one implementation, ruthenium tetraoxide thus generated is utilized with a strontium organometallic precursor for atomic layer deposition of strontium ruthenate films of extremely high smoothness and purity.

The invention relates to a supported bimetallic catalyst for the catalytic oxidation of VOCs and a preparation method and application thereof. The supported bimetallic catalyst takes titanium dioxide as a carrier, a first active component as ruthenium dioxide, a second active component as any one of magnesium oxide, cobalt oxide, copper oxide or cerium oxide and is capable of accelerating the catalytic oxidation efficiency on the VOCs through the concerted catalysis effect between the two active components. Compared with a commercial supported palladium-platinum catalyst, the supported bimetallic catalyst disclosed by the invention is lower in cost and higher in universality, achieves the complete oxidation temperature of multiple VOCs between 170 DEG C and 250 DEG C, is superior to the commercial supported palladium-platinum catalyst in integral property and very high in final reaction product CO2 selectivity and has preferable application prospect.

An electrically conducting composite is made by providing an aerogel structure of nonconducting material, exposing the aerogel structure to a mixture of RuO4 and a nonpolar solvent in an inert atmosphere, wherein the mixture is held initially at a first temperature that is below the temperature at which RuO4 decomposes into RuO2 in the nonpolar solvent and in the presence of the aerogel, and allowing the mixture to warm to a second temperature that is above the temperature at which RuO4 decomposes to RuO2 in the nonpolar solvent and in the presence of the aerogel, wherein the rate of warming is controlled so that as the mixture warms and the RuO4 begins to decompose into RuO2, the newly formed RuO2 is deposited throughout the aerogel structure as a three-dimensionally networked conductive deposit.

The invention discloses ruthenium dioxide-based composite nano-material and a preparation method thereof. The preparation method includes that dispersing carbon matrix in water, adding ruthenium source and oxidized metal source, regulating the pH value of the solution, after stirring to adsorb, performing oil bath reaction, centrifuging, washing, and roasting in an inert atmosphere to obtain the composite nano-material. The preparation method is easy to operate, high in yield, low in cost and environmental friendly, and the prepared ruthenium dioxide / metal nano-particle / carbon composite nano-material is featured with small active ingredient size, large specific surface area and uniform dispersion. The ruthenium dioxide is hydrous ruthenium dioxide which belongs to good reversible charging / discharging active substances, and the metal nano-particle is easy to adsorb protons and transmit electrons to improve the electro-chemical performance of the ruthenium dioxide / metal nano-particle / carbon composite nano-material. The ruthenium dioxide / metal nano-particle / carbon composite nano-material can be used as super-capacitor electrode material and has excellent electro-chemical performance.

Disclosed are a double-electrode-layer capacitor electrode material and a manufacturing method thereof. The double-electrode-layer capacitor electrode material is a high-energy tantalum hybrid capacitor cathode piece which is a composite cathode piece with a matrix of tantalum-based ruthenium dioxide (RuO2); the composite cathode piece comprises a basic tantalum piece, and a multi-metal oxide layer formed by blending ruthenium oxide, tantalum oxide and other metal oxides is covered on a surface of the tantalum piece; the multi-metal oxide layer is formed by blending the ruthenium oxide, the tantalum oxide and more than one of activated carbons, copper oxide, potassium oxide and manganese oxide, and subjected to chemical dipping processing to be formed.

The invention discloses a high-performance thick-film resistor paste composition. The composition comprises 12-44 parts of conductive powder, 20-60 parts of lead borosilicate glass powder, 0.5-5 partsof inorganic additive and 35-45 parts of organic carrier based on 100 parts in total; the conductive powder is one or a mixture of two of ruthenium dioxide or lead ruthenate subjected to surface-treatment by using a phosphate ester organic treating agent. The conductive powder comprises the components: 40-100% of ruthenium dioxide and 20-100% of lead ruthenate. According to the high-performance thick-film resistor paste composition disclosed by the invention, the materials of ruthenium dioxide with extremely low resistivity and lead ruthenate with high resistivity are adopted as main conductive powder, the resistor paste is guaranteed to have excellent resistance value stability, excellent voltage resistance and power resistance characteristics at different resistance values; and the resistor has good compactness after being sintered.

The invention discloses a titanium mesh anode for an electrodeposited nickel, which consists of a titanium coated copper conducting bar, a titanium plate support welded below the titanium coated copper conducting bar, and two titanium meshes welded onto the two sides of the titanium plate support, wherein the surfaces of both the titanium meshes are covered with metallic oxide coatings; the metallic oxide coating consists of platinum group metallic oxide and valve metallic oxide; the molar ratio of the platinum group metal and the valve metal is 1 to 2:1 to 3; 10 to 50g platinum group metal is contained in the titanium mesh per square meter; the platinum group metallic oxide is iridium oxide and / or ruthenium dioxide; and the valve metallic oxide is or several of titanium dioxide, tantalum pentoxide and zirconium dioxide. The invention also provides a preparing method for the titanium mesh anode. Compared with the conventional lead-base alloy anode, the titanium mesh anode has light weight, low oxygen evolution potential and long service life, can prevent the titanium meshes from being dissolved, and can improve the quality of the cathode products.

The invention discloses a ruthenium-palladium-cobalt coating electrode containing a tin-antimony intermediate layer. The surface of the main body of a titanium plate is coated with 3-7 layers of tin-antimony oxide coating as the intermediate layer of the target electrode; the surface of the intermediate layer is coated with There are 15-24 layers of ruthenium palladium cobalt oxide coating as the surface layer of the target electrode. Compared with the traditional ruthenium dioxide coated titanium electrode (RuO2 / Ti), the coated titanium electrode of the present invention has higher oxygen evolution potential and lower Excellent chlorine evolution potential and longer service life can effectively improve the current efficiency and electrode service life of the electrocatalytic oxidation reaction system.

The invention discloses a thick-film resistor paste simultaneously applicable to an aluminum oxide ceramic substrate and an isolation dielectric layer. The resistor paste is composed of conductive powder, a glass binding phase, an additive and an organic carrier, wherein the conductive powder is at least one selected from silver powder, palladium powder, ruthenium dioxide and lead ruthenate; and the glass binding phase is lead borosilicate glass composite magnesium aluminate spinel. According to the invention, the silver powder, the palladium powder, the ruthenium dioxide and the lead ruthenate are adopted as conductive phases, so it is guaranteed that the resistor paste has good resistance and temperature coefficients under different resistance values; and the resistor paste is used on the aluminum oxide ceramic substrate and the isolation dielectric layer by adopting a magnesium aluminate spinel-lead borosilicate glass powder composite material; and the prepared luminum oxide ceramic substrate and the prepared isolation dielectric layer both have the characteristics of good resistance consistency and small temperature coefficient, and meet the use requirements of various thick-film circuit products.

The invention discloses a titanium-base tubular ruthenium dioxide coating membrane electrode and a preparation method thereof. According to the preparation method, a titanium filter pipe is utilized to replace a primary titanium plate to be taken as a matrix, and as numerous holes with the bore diameters of several microns are formed in the surface of the titanium filter pipe, compared with the normal titanium plate, the specific surface area is increased; and a firmly-bonded, uniformly-dispersed, surface-compacted and crack-free ruthenium dioxide thin layer is formed at the surface of the titanium filter pipe by utilizing a thermal oxidation method, and an oxide film can be firmly bonded with the titanium filter pipe after being subjected to the thermal oxidation. The electrode prepared by utilizing the preparation method has the advantages of firm coating structure, good electro-catalytic property and the like; the chlorine evolution potential of the ruthenium dioxide electrode is low, so that the chlorine is beneficially separated out; meanwhile, the operation of the preparation process is easy to control, the cost is low, the device requirements are relatively low, and the prepared electrode has double functions of electrochemical oxidation and membrane separation. Due to a diffusion action, the electrochemical oxidation efficiency can be improved, and meanwhile, the membrane pollution can be reduced due to the electrochemical oxidation, so that pollutants which are difficult to be biologically degraded can be more effectively processed.

A separative extended gate field effect transistor based vitamin C sensor includes: a substrate; a patterned conductive layer on the substrate, including a first electrode region array, at least two first contact regions, a second electrode region and a second contact region; a graphite-based paste layer on the first electrode region array; a ruthenium dioxide sensing layer on the graphite-based paste layer and electrically connected to the first contact region; a vitamin C enzyme layer on the ruthenium dioxide sensing layer; and a reference electrode on the second electrode region electrically connected to the second contact region.

The invention provides a method for preparing a ruthenium dioxide combination electrode for energy storage. The method is characterized by comprising the following steps of: a) mixing ruthenium dioxide materials with different content, a binder, a thickening agent, carbon and deionized water in shear mixing equipment to prepare a plurality of kinds of slurry with different ruthenium dioxide content and different viscosity; b) coating the slurry with the lowest ruthenium dioxide content on a current collector, drying and forming; and c) coating multi-layer slurry by using the method in the step b). The ruthenium dioxide combination electrode is tightly combined with the current collector, has the characteristics of high capacity and long service life and can be widely applied to the field of energy storage for national defense and civil use.

The invention discloses resistance paste for a high-performance thick-film resistor, the resistance paste comprises the following components in percentage by mass: 20%-45% of conductive powder, 25%-40% of calcium borosilicate glass powder, 1%-3% of nano yttrium aluminum garnet powder, 0.5%-10% of an inorganic additive and 25%-35% of an organic carrier, wherein the conductive powder is a composite material generated by ruthenium dioxide and porous silicon carbide. The preparation method comprises the following steps: mixing ruthenium dioxide with the specific surface area of 75-95m < 2 > / g and porous silicon carbide with the particle size of 1-2[mu]m, granulating, carrying out isostatic pressing for 4-6h under the pressure of 100-150MPa, carrying out vacuum heat treatment for 1-2h at the temperature of 400-500 DEG C, crushing, and carrying out ball milling to obtain powder with the particle size of 1-2[mu]m. The resistance paste has the advantages of being free of lead, environmentally friendly, high in resistance precision, high in power resistance, good in electrostatic discharge, good in constant-temperature placement stability and the like.

The invention discloses an advanced treatment device for nitrogen-containing heterocyclic ring compound chemical tail water. The advanced treatment device sequentially consists of an electrochemical oxidation device, a biological aeration filter device and an electrodialysis device, wherein an electrochemical oxidation reactor consists of a microporous tube type membrane electrode of a titanium substrate ruthenium dioxide coating serving as an anode and a matching perforated stainless steel cathode. The invention also discloses an advanced treatment combination technology for the nitrogen-containing heterocyclic ring compound chemical tail water. According to the advanced treatment combination technology, electrochemical oxidation is combined with the membrane separation technology to form an electromembrane coupling technology; and the biological aeration filter is used for degrading organic matters and performing electrodialysis desalination, optimized linking of the treatment technologies at the sections is realized, thus the wastewater treatment technology has the best effect, the organic content COD of the final yielding water is less than or equal to 50mg / L, and the electric conductivity is lower than or equal to 10muS / cm. By adopting the device disclosed by the invention, advanced treatment of most nitrogen-containing heterocyclic ring chemical tail water can be realized; the technology has the advantages of fast reaction, stable operation, no pollution, wide application range and low cost; and the treated wastewater can reach the recycling standard.

The invention discloses a visible light catalyzed cross-coupling hydrogen desorption method. The method takes an organic dye as the photo-sensitizer, adopts platinum sol, palladium sol, hydrated ruthenium dioxide, hydrated ruthenium trioxide, ruthenium sulphate, ruthenium nitrate, or hydrated ruthenium dioxide nano particles loaded on water-soluble graphene as the catalyst, utilizes visible lights to irradiate a solution of tertiary amine and nucleophilic reagent in an atmosphere of inert gas without any oxidant, and only obtains cross-couple products and hydrogen gas. The method has the advantages of high reaction efficiency, atom economy, and environment-friendliness, and develops a novel reaction type.

The invention discloses a preparation method of hydrous ruthenium dioxide for a resistance slurry. The method comprises the following steps: weighing a certain amount of a ruthenium source, adding a certain amount of hydrochloric acid to hydrolyze the ruthenium source into a ruthenium hydrochloride solution, adding the obtained ruthenium hydrochloride solution into a prepared sodium hydroxide solution in a dropwise manner until a black flocculent precipitate appears, adding hydrochloric acid to hydrolyze and neutralize, standing, carrying out pumping filtration, washing, and drying to prepare ultrafine hydrous ruthenium dioxide. The hydrous ruthenium dioxide prepared through the method has the advantages of high purity, uniform particle size, realization of the particle size control through adjusting technological conditions, and good dispersibility; and the method has the advantages of mild synthesis conditions, safety, reliability, simple process, simple operation, short cycle, high efficiency, low device requirements, and easy industrial large-scale production of ultrafine hydrous ruthenium dioxide powder.

The invention discloses a preparation method for a ruthenium-oxide-based electrode material. The preparation method comprises the following steps of dissolving 2-5 g of hydration ruthenium trichloride and 1-3 g of carbon material into 100-200 ml of alcohol-water solution, and evenly mixing the mixture to obtain mixed solution; adding 10-150 ml of NH4HCO3 solution with the concentration of 1.0-2.0 mol / L into the mixed solution, and adjusting a PH value into 7-9 to obtain Ru(OH)4; after aging is conducted and foreign ions are removed in a centrifugal mode, conducting dehydration processing to obtain a composite electrode material of amorphous ruthenium dioxide and the carbon material; adding a conductive agent of carbon nano-tubes or KS6 conductive graphite counting for 10-20% of the total weight into the prepared composite electrode material, and fully mixing and grinding the mixture to obtain the ruthenium-oxide-based electrode material. Precursors adopted in the preparation method for the ruthenium-oxide-based electrode material are the hydration ruthenium trichloride, the carbon material and ammonium bicarbonate, mixing is more even, the carbon nano-tubes or KS6 conductive graphite is selected to serve as the conductive agent, the composite electrode material has the advantages of being high in specific capacity, low in equivalent series resistance, long in service life, low in cost and the like.

The invention discloses a preparation method of a ruthenium dioxide composite electrode material. The method comprises steps that: ethanol solution is added to a ruthenium source solution, mixing is carried out, a cationic surfactant is added and is taken as a protective agent, uniform mixing is carried out, the mixed solution is sealed in an autoclave, after heating and reaction, the resultant after centrifugation and washing is mixed with toluene, carbon matrixes are utilized for absorption, after centrifugation and washing, and the ruthenium dioxide / carbon composite nano-material is acquired after high temperature roasting. The method has advantages of simple technology, high yield, low cost and no pollution, the prepared ruthenium dioxide / carbon composite nano-material has properties of fine dimensions of active components, huge specific surface area and uniform mixing. The prepared ruthenium dioxide / carbon composite nano-material is an excellent reversible charging / discharging active substance, has the super specific surface area, can realize rapid charging / discharging, has excellent electrochemistry performance and has wide application prospects.

The invention provides a high-dispersion supported ruthenium dioxide catalyst and a preparing method thereof. The preparing method comprises the steps that a precious metal polymeric precursor solution and a soluble salt solution composing the +2 and +3 valence metal ions of hydrotalcite are mixed, nucleating and growing are carried out in an alkali solution environment provided by a precipitating agent, and the RuO2 / MAl-LDH catalyst is obtained through crystallization, washing, drying and further retreatment. According to the catalyst, the precious metal Ru serves as the active ingredient and is supported on the surface of hydrotalcite MAl-LDH as a supporter, and the supported RuO2 catalyst uniform in dispersion and size is formed; the supporting amount of the active ingredient Ru is within the range of 0.5-10%, formed RuO2 nanometer particles are highly dispersed on the surface of the supporter, the particle size of the RuO2 nanometer particles ranges from 1 nm to 5 nm, and the RuO2 nanometer particles are spherical or semispherical. The transformation frequency TOF of the catalyst is remarkably higher than that of a Ru-based catalyst reported in documents in alcohol selective oxidation reactions.

The invention discloses a preparation method of a porous ruthenium dioxide and manganese dioxide combined electrode. The preparation method of the porous ruthenium dioxide and manganese dioxide combined electrode comprises the following steps of mixing potassium permanganate, thick sulfuric acid and deionized water, obtaining mixed solution after evenly stirring, immersing substrate and obtaining a substrate-loaded precursor comprising manganic after hydrothermal reaction of 60 to 110 DEG C water; roasting the substrate-loaded precursor comprising manganic under 200 to 500 DEG C under argon atmosphere and obtaining manganese dioxide which is loaded on the substrate after cooling; mixing ruthenium chloride and water to obtain ruthenium salt solution, immersing the manganese dioxide which is loaded on the substrate to the ruthenium salt solution and performing aftertreatment to obtain the porous ruthenium dioxide and manganese dioxide combined electrode. According to the porous ruthenium dioxide and manganese dioxide combined electrode, the porous manganese dioxide directly grows on the substrate, nano ruthenium dioxide particles are loaded on the porous manganese dioxide, and a porous structure is maintained after loading of the ruthenium dioxide.

The invention discloses a preparation method of an active carbon-supported ruthenium-based ammonia synthesis catalyst, and belongs to a preparation method of a novel ammonia synthesis catalyst for synthesizing ammonia by hydrogen and nitrogen in ammonia synthesis industry in the fertilizer field. The preparation method is characterized in that nitro diammino ruthenium dioxide (RO2(NH3)2(NO3)2) is used as a metal ruthenium precursor; nitrates of alkali metal and alkaline earth metal are used as auxiliary agents ; active carbon is used as a carrier; and the active carbon-supported ruthenium-based ammonia synthesis catalyst is realized by an impregnation method. The active carbon-supported ruthenium-based catalyst prepared by the method of the invention does not contain chloride ions, does not need procedures of reduction or precipitation, has uniform distribution of active components and the auxiliary agents on the catalyst, and has no ruthenium loss in the preparation process. The method of the invention is simple and rapid in operation, and the prepared catalyst is stable in performance, high in activity, and suitable for industrial production.

The invention discloses a preparation method of silver-doped modified ruthenium dioxide thick-film resistance slurry. The method specifically comprises the following steps of: 1, using RuO2 powder, CuO powder and Ag powder to prepare a conductive phase; 2, using SiO2, Al2O3, CaO, BaO, B2O3, PbO and Bi2O3 to prepare a modified aluminosilicate glass phase; 3, using terpilenol, cellulose, butyl carbitol and castor oil to prepare an organic phase; and 4, uniformly mixing the conductive phase obtained in the step 1, the modified aluminosilicate glass phase obtained in the step 2 and the organic phase in the the step 3 to obtain the silver-doped modified ruthenium dioxide thick-film resistance slurry. According to the invention, the problem that a contradiction exists between low resistance and high TCR of the present thick-film resistance slurry is solved, the preparation method has no specific demands on the production process and device, and the popularization and the industrial production are facilitated.

The invention discloses resistance paste for a high-stability thick-film resistor. The resistance paste comprises the following components in percentage by mass: 15-40% of conductive powder, 25-45% of modified glass powder, 1-5% of an inorganic additive and 25-35% of an organic carrier. According to the invention, noble metal powder in the conductive powder is one or more selected from silver, palladium, silver-palladium alloy powder and ruthenium dioxide; and the modified glass powder is powder with a particle size of 0.5-2 [mu]m and is prepared by mixing polycrystalline diamond powder with a particle size of 1-5 [mu], which is prepared from carbon black or graphite through a directional blasting method, with glass powder, conducting granulating and then performing treatment via a hot isostatic pressing process. The resistance paste is used for the thick-film resistor and has the advantages of high voltage resistance, large current resistance and good resistance stability.

The invention discloses nanometer rare earth thick-film electronic paste and a preparing method thereof. The nanometer rare earth thick-film electronic paste comprises an inorganic bonding phase, an organic solvent carrier, ruthenium dioxide, lanthanum oxide or yttrium oxide and high-purity nanometer silver powder. The inorganic bonding phase comprises bismuth trioxide, silica and aluminum oxide. The organic solvent carrier comprises an ethyl cellulose mixed solution, a thickening agent, a thixotropic agent and an antifoaming agent. The ethyl cellulose mixed solution comprises an organic solvent and ethyl cellulose. By means of the above material ratio, the nanometer rare earth thick-film electronic paste is low in sintering temperature, short in sintering time, low in resistance per square, good in adhesive force, good in electric conduction heating effect and good in weldability. The preparing method of the nanometer rare earth thick-film electronic paste includes the following technological steps that firstly, the inorganic bonding phase is prepared; secondly, the ethyl cellulose mixed solution is prepared; thirdly, the organic solvent carrier is prepared; and fourthly, the nanometer rare earth thick-film electronic paste is prepared. By means of the preparing method, the nanometer rare earth thick-film electronic paste can be effectively prepared.

The invention discloses a method for preparing linear positive temperature coefficient (PTC) thermistor slurry. The method comprises the following steps: 1. mixing copper hydroxide, ruthenium dioxide according to a certain mol ratio, performing ball milling, drying, crushing, sieving, sintering, crushing, and performing ball milling to obtain functional ceramic phase particles for later use; 2. mixing silica, alumina, boron trioxide, barium oxide and titanium dioxide according to a certain mass ratio, performing ball milling, drying, crushing, sintering, quenching, performing ball milling to obtain glass powder for later use; 3. mixing the resultants from the former two steps with copper oxide in a certain ratio and adding a certain amount of an organic carrier to roll into slurry. According to the invention, not only the linear PTC thick film slurry for screen printing can be developed, but also the slurry with high temperature coefficient of resistance (TCR) and high square resistance is obtained, wherein the TCR is more than 4000ppm / DEG C and the square resistance is more than 100 omega per square.

The invention discloses a preparation method of a nitrogen-doped carbon nanotube-ruthenium dioxide composite material. The preparation method comprises the following steps: 1) mixing a nitrogen-dopedcarbon nanotube solution with a ruthenium-source solution to obtain a mixed solution, adding an alkali solution into the mixed solution, and uniformly carrying out mixing to obtain a precursor solution with a pH value of 10-12; 2) carrying out aging on the precursor solution at a temperature of 50-90 DEG C for 3-5 hours, and then carrying out centrifuging and washing to obtain a precipitate; and 3) carrying out a hydrothermal reaction or calcination on the precipitate to obtain the nitrogen-doped carbon nanotube-ruthenium dioxide composite material. The nitrogen-doped carbon nanotube-rutheniumdioxide composite material obtained by the preparation method has excellent OER catalytic performance and electrical conductivity. The invention also discloses an application of the composite material obtained by the preparation method in a catalytic oxygen evolution reaction.

The invention discloses a composite electrode super capacitor, which comprises a diaphragm and electrolytes, wherein the electrolytes are positioned on two sides of the diaphragm; composite electrodes are arranged outside the electrolytes and consist of collectors, graphene layers and ruthenium dioxide layers; the graphene layers cover internal surfaces of the collectors; the ruthenium dioxide layers cover the internal surfaces of the graphene layers; the internal surfaces of the ruthenium dioxide layers are contacted with the electrolytes; and sealing adhesives are arranged at both ends of the diaphragm, the electrolytes and the composite electrodes. The structure that the composite electrodes consist of the collectors, the graphene layers and the ruthenium dioxide layers has the characteristics of large specific surface area of graphene and large specific capacity of ruthenium dioxide and has the advantages of a mixture of the graphene and the ruthenium dioxide. Amorphous ruthenium dioxide hydrate is obtained by coating wet gel on the surface of the graphene, the use of noble metal ruthenium can be effectively controlled, the using amount of the ruthenium is reduced, and production cost is saved.

A preparation method of a ruthenium dioxide nanometer cluster / carbon composite material comprises the following steps: preparing a ruthenium precursor solution and simultaneously preparing a fresh reducing agent; adding aqueous solution of the prepared fresh reducing agent to the ruthenium precursor solution drop by drop, stopping the adding when a pH value is within the range from 4.0 to 5.2, then continuing stirring to obtain ruthenium nanometer clusters dispersed in the water; adding a carbon-based material or a dispersion liquid thereof in the water to the dispersion liquid of the ruthenium nanometer clusters, so as to obtain a ruthenium nanometer cluster / carbon composite material; and calcining the obtained ruthenium nanometer cluster / carbon composite material at a high temperature to obtain the ruthenium dioxide nanometer cluster / carbon composite material. The preparation method of the present invention is simple in process, high in yield, low in cost, and free from pollution; in addition, the prepared ruthenium dioxide nanometer cluster / carbon composite material is fine in dimension of active components, huge in specific surface area, and uniform in dispersion, thus wide application prospect can be achieved in the fields of energy storage, catalysis and so on.

The invention belongs to the technical field of electrocatalytic electrode preparation, and particularly relates to a three-dimensional ordered porous ruthenium dioxide membrane electrode and a preparation method thereof. The membrane electrode comprises a porous titanium matrix and a three-dimensional ordered ruthenium dioxide active surface layer, wherein the three-dimensional ordered rutheniumdioxide active surface layer has a communicated structure formed by three-dimensional ordered spherical piling, and a porous channel for liquid flowing is formed among the piled spheres. According tothe ruthenium dioxide membrane electrode, emulsion containing polystyrene microspheres is dripped to the surface of a titanium plate, hydrate ruthenium dioxide grows in gaps in a template by an electrodeposition method, and the template is removed through high-temperature sintering and is dehydrated to obtain the three-dimensional ordered porous ruthenium dioxide membrane electrode. The electrodecan overcome the defect that a traditional ruthenium dioxide electrode has a compact structure, the utilization rate of ruthenium dioxide is not high and ruthenium dioxide cannot applied to a filter type electrochemical oxidation system, the contact area, mass transfer efficiency and filtration flux can be greatly improved, and meanwhile, the preparation cost and operation energy consumption can be reduced.