18 results about "Iridium chloride" patented technology

The application discloses a loadable IrRu alloy nanosheet catalyst and a preparation method thereof. The IrRu alloy nanosheet has a nanometer and / or sub-nanometer size thickness. The preparation method is simple in process and good in universality. According to the requirements of the application type of the catalyst, a targeted carrier can be selected. Metal precursors of hydrate iridium chloride and trichloro-ruthenium, a reducing agent and a carrier are fully mixed in an organic solvent. Under the reaction condition of heating and stirring, the IrRu alloy nanosheet can be controlled to grow on the surface of the carrier. The catalyst shows excellent electrocatalytic oxygen evolution reaction (OER) performance in an acidic and alkaline electrolyte, respectively.

The invention relates to the technical field of catalysts, in particular to an iridium-containing Lewis base catalyst and a preparation method and application thereof.The preparation method comprises the following steps that iridium chloride is dissolved in oxygen-free water, a ligand compound is added into a system, the temperature is increased to 75-79 DEG C, a reducing agent is dropwise added into the system while stirring is conducted till no sediment is generated, washing is conducted with oxygen-free water after filtering, and the iridium-containing Lewis base catalyst is obtained; the structure of the ligand compound is as shown in the formula I: # imgabs0 #. The catalyst disclosed by the invention is simple in synthesis method, relatively good in catalytic efficiency, and capable of reducing the synthesis temperature and time.

The present invention discloses a low-temperature denitration catalyst and a preparation method thereof. The catalyst comprises the following raw materials by weight: 60-70 parts of nano titanium dioxide, 0.5-2.5 parts of zirconium oxide, 0.5-3 parts of modified graphene, 0.02-0.1 parts of chloroiridic acid, 5-8 parts of ammonium heptamolybdate, 0.5-2.5 parts of ammonium metavanadate, 2-10 parts of cerium nitrate, 3-8 parts of polypropylene fiber, 1-4 parts of ultrafine activated carbon, 2-6 parts of aluminum sol, 1.5-5 parts of polyethylene oxide, and 1.2-3.5 parts of aminocellulose. The denitration catalyst prepared by the present invention has the characteristics of large specific surface area, high porosity, high low-temperature catalytic activity, strong anti-poisoning ability, high strength, etc., and is particularly suitable for use in the low temperature range of 100-180°C, and has broad application prospects.

This invention discloses a three-armed cadmium sulfide nanorod photocatalyst, comprising: three-armed cadmium sulfide nanorods, molybdenum disulfide, and iridium disulfide; wherein each of the three tips of the three-armed cadmium sulfide nanorods is loaded with molybdenum disulfide and iridium disulfide. This photocatalyst is obtained by mixing the three-armed cadmium sulfide nanorods with iridium chloride and sodium molybdate in a solvent, followed by a hydrothermal reaction. This invention achieves efficient separation of photogenerated electron-hole pairs and improves photocatalytic performance by successfully loading molybdenum disulfide and iridium disulfide nanoflower-like co-catalysts onto the tips of the three-armed cadmium sulfide nanorods.

The embodiment of the invention relates to a method for recovering iridium from deliquescent iridium chloride, and belongs to the technical field of precious metal recovery. The method for recovering iridium from deliquescent iridium chloride provided by the embodiment of the invention comprises the following steps: dispersing deliquescent iridium chloride in a cosurfactant to obtain an iridium chloride solution; the method comprises the following steps: firstly, adding a pH regulator to regulate the pH value of an iridium chloride solution; then adding strong base to generate iridate, and heating in an oil bath until the strong base is completely dissolved to obtain a mixture solution; and putting the mixture solution into a reaction kettle for hydrothermal reaction to obtain a product, washing the product with an organic solvent for multiple times, drying the product, and calcining the product in an inert atmosphere to obtain pure-phase metal elementary substance iridium. The method provided by the embodiment of the invention is wide in applicability, has the advantages of being high in platinum group metal recovery rate, simple, convenient, feasible, safe, low in production cost, green, energy-saving, environment-friendly and the like, and has remarkable economic benefits and wide market popularization value.

The invention provides a preparation method of an inert anode for CO2 high-temperature molten salt electrolysis, which comprises the following steps: a precursor, a stabilizer and a gelling agent are added into an alcohol solvent and stirred until complete dissolution to obtain composite coating slurry, the precursor comprises nickel chloride (NiCl2), ferric chloride (FeCl3), iridium chloride (IrCl4) and ruthenium chloride (RuCl4), the molar mass of Ni: Fe in the precursor is 0.4-0.6, the molar mass of Ru: Ir is 0.5-4, the molar mass of (Ni + Fe): (Ru + Ir) is 0.01-0.1, and the molar mass of Ru: Ir is 0.01-0.1. And uniformly coating the composite coating slurry on the surface of a titanium substrate, drying, carrying out thermal oxidation, repeating the steps of coating, drying and thermal oxidation for 10-15 times, and calcining to obtain the composite coating inert anode. The cost is effectively reduced, the corrosion resistance and the electrocatalytic activity of the anode and the bonding strength of the coating and the substrate are remarkably improved, the inert anode current efficiency reaches 85% or above, the CO2 stable electrolysis time can reach 150 h or above, and the corrosion rate is lower than 1.01 * 10 <-5 > g.cm <-1 >. H <-1 >.

The present application relates to electrolytic hydrogen production from various water sources and simultaneous metal recovery from wastewater, and discloses a sulfur-doped carbon-coated ultra-low iridium loading particle catalyst, wherein the iridium particles are uniformly sized and uniformly dispersed in sulfur-doped carbon nanosheets. The present application also provides a preparation method for the sulfur-doped carbon-coated ultra-low iridium loading particle catalyst, comprising the following steps: step 1, placing 12-18 mg of iridium chloride trihydrate, 0.8-1.2 g of L-methionine and 0.15-0.25 g of sulfur in a ball mill jar, collecting and drying after ball milling for 2 h, and then calcining under an inert atmosphere; step 2, immersing the above powder in CS2 liquid, stirring for 2 h, freeze-drying, and then calcining under an inert atmosphere. The sulfur-doped carbon-coated ultra-low iridium loading particle catalyst prepared by the present application has uniform particle size, all less than 3 nm, and is uniformly dispersed in sulfur-doped carbon nanosheets. Meanwhile, the iridium loading is only 9.81%, and the utilization rate of iridium elements is higher.

Provided is a method for preparing iridium oxide, comprising the steps of: preparing iridium chloride; mixing iridium chloride, a solvent and a pore control agent to prepare a dispersion; mixing the dispersion with an ion exchanging agent and performing ion exchange; removing the solvent from the dispersion to prepare a powder; and heat-treating the powder.

The invention relates to an ionic iridium (III) complex based on (+ 3, + 2, + 1)-[Ir (NCN / NNN) (CN) (R)] < + / 2 + > configuration and a preparation method and application thereof, and the preparation method comprises the following steps: 1, reacting a tridentate ligand NCN / NNN with iridium chloride trihydrate in a specific solvent to obtain a first intermediate; 2, reacting the obtained first intermediate with a bidentate ligand HCN to obtain a second intermediate; and step 3, substituting the second intermediate with a monodentate cyanide ligand R to obtain a target product. The complex is efficient in synthesis method, has good photophysical properties, and has low cytotoxicity and high phototoxicity index for lung cancer cells, colon cancer cells and liver cancer cells, which shows that the complex has good application prospects in the field of metal anti-cancer drugs.

The invention relates to the field of advanced non-ferrous metal material high-heat-insulation coating protection, in particular to a method for preparing a metal-ceramic composite coating through electrophoretic deposition. Firstly, the heat-resistant steel part for the thermal generator set is subjected to oil removal and cleaning pretreatment, and surface oil stains and oxidation impurities are removed; then nickel-based electroplating liquid containing iridium chloride and antimony chloride is prepared, the pretreated heat-resistant steel part is subjected to electro-deposition, and a nickel-iridium-antimony composite metal bonding layer is formed on the surface of the heat-resistant steel part; then preparing a ceramic suspension which takes gamma-butyrolactone as a solvent and contains YSZ and nano ruthenium dioxide powder, and putting the part with the metal bonding layer into the suspension for electrophoretic deposition to form a ceramic coating precursor; then, the part is placed in a high-temperature furnace protected by inert gas to be sintered, and interface fusion and coating densification of the metal bonding layer and the ceramic layer are achieved; and finally, the metal-ceramic composite coating is naturally cooled to the room temperature in the protective atmosphere, and the obtained metal-ceramic composite coating has the high interface bonding force and the excellent heat insulation performance.

The invention provides a titanium electrode group for wastewater treatment, which comprises a plurality of titanium electrode units, an insulating layer is arranged between every two adjacent titanium electrode units, each titanium electrode unit comprises a substrate and a surface coating, and the surface coating is provided with a microporous nano structure; the matrix comprises titanium and doped metal, the doped metal accounts for 10-30% by weight, the balance is titanium, and the doped metal comprises at least one of chromium, nickel, manganese, ruthenium, rhodium, palladium, tantalum, iridium, platinum and gold; and the surface coating comprises at least one of ruthenium chloride, iridium chloride, tantalum chloride, platinum chloride, palladium chloride and tungsten chloride. Through the arrangement, the wastewater treatment effect and treatment efficiency are effectively improved.

The invention belongs to the technical field of noble metal catalyst preparation, and discloses a large-scale continuous preparation method and system of an iridium acetate catalyst solution, and the large-scale continuous preparation method comprises the following steps: 1) dissolving iridium chloride, chloroiridic acid or soluble chloroiridate in water to obtain a solution; 2) adding an alkaline precipitator into the solution obtained in the step 1) under heating and stirring conditions, and performing solid-liquid separation to obtain iridium-containing slurry; 3) washing the iridium-containing slurry with water and carrying out solid-liquid separation; and 4) dissolving the washed iridium-containing slurry in an acetic acid aqueous solution to obtain an iridium acetate catalyst solution. According to the method and the system, the working efficiency can be greatly improved, the iridium acetate catalyst solution with stable yield and product quality can be obtained by taking iridium chloride, chloroiridic acid or soluble chloroiridate as raw materials through a continuous preparation process, and the method and the system have the advantages of simplicity in operation, high yield, less waste liquid, safety, environment friendliness and the like.

The invention relates to the field of electrochemical water treatment technology and environmental functional materials, and discloses a method for preparing a high-activity ruthenium iridium titanium membrane electrode through a PVA-assisted thermal decomposition-high-temperature roasting method, which comprises the following steps: firstly, obtaining uniform titanium particles through ball milling and screening, and mixing the uniform titanium particles with a binder polyvinylidene fluoride and an organic solvent N, N-dimethylformamide; mixing N, N-dimethylacetamide in proportion, extruding to form a tubular porous titanium tube matrix, and drying; dissolving polyvinyl alcohol powder in ultrapure water to form a stock solution, and mixing and stirring the stock solution with ruthenium chloride and iridium chloride solutions in a molar ratio of 1: 1 according to a specific proportion to prepare a uniform and stable active coating solution; and finally, by taking a titanium tube as a substrate, etching the titanium tube with an oxalic acid solution, brushing an active coating, and carrying out high-temperature roasting in a nitrogen atmosphere through a segmented heating procedure to form the high-activity ruthenium iridium titanium membrane electrode. The physical stability and the structural integrity of the electrode are enhanced, and the current efficiency and the electrochemical oxidation efficiency are improved.

The application discloses application of iridium-chlorine bridge dimer, and recovery of iron phosphate in waste lithium iron phosphate powder. The iridium-chlorine bridge dimer is used to generate singlet oxygen under light irradiation, to form a metal complex with an organic ligand, and to selectively strengthen oxidation of lithium iron phosphate material, so that the lithium iron phosphate material is converted into insoluble iron phosphate precipitate, and the purpose of efficient separation of components and recovery of products is achieved. The recovery rate of the iron phosphate in the waste lithium iron phosphate powder is higher than 96% by using the iridium-chlorine bridge dimer, and the purity of the recovered iron phosphate in the waste lithium iron phosphate powder is higher than 98%.

The present invention discloses a ruthenium-iridium alloy material, its preparation method, and application. The ruthenium-iridium alloy material is prepared by the following method: iridium chloride and ruthenium chloride are added as metal sources to a mixed solution of N-methylpyrrolidone and formic acid, and the mixture is thoroughly stirred; then the temperature is raised to synthesize a ruthenium-iridium alloy composed of ultrasmall nanoparticles through a solvothermal method. This method uses iridium chloride and ruthenium chloride as metal sources, N-methylpyrrolidone as a solvent, and solvothermal method under the reducing action of formic acid to synthesize a ruthenium-iridium alloy having a "fingerprint-like" structure. Due to its unique morphology and optimized electronic structure, the alloy material has excellent catalytic activity and excellent stability in the acidic electrocatalytic oxygen evolution reaction, and can be used as an anode catalyst for proton exchange membrane water electrolysis to produce hydrogen.

The invention belongs to the technical field of non-ferrous metallurgy, and discloses a preparation method of a chloroiridic acid solution, which comprises the following steps: mixing iridium powder and a hydrochloric acid solution under stirring, heating, adding chloroauric acid and simultaneously introducing chlorine, and continuously stirring to obtain a mixed solution; stopping introducing chlorine gas, continuously carrying out heat-preservation stirring, and filtering to obtain filter residues and filtrate; cooling the filtrate, adding sodium sulfite, stirring, cooling to room temperature, and filtering to obtain insoluble slag and a chloroiridic acid solution; chloroauric acid and chlorine are added into a hydrochloric acid solution containing iridium powder at the same time, in the presence of the chlorine, the chloroauric acid reacts with the iridium powder to generate iridium chloride, Au < 3 + > is reduced into Au < + >, Au < + > is oxidized into Au < 3 + > under the acidic condition through the oxidability of the chlorine, the chloroauric acid achieves the effect of a catalyst, and dissolution of the iridium powder is accelerated; in addition, the invention also discloses a chloroiridic acid solution which is prepared by the preparation method of the chloroiridic acid solution.

The application discloses a preparation method of PtRhPdIrAu / C noble metal high-entropy alloy nanoparticles, and specifically comprises the following steps: mixing a platinum precursor, rhodium chloride hydrate, palladium chloride, iridium chloride hydrate and chloroauric acid to form a noble metal precursor, and then dissolving the noble metal precursor in triethylene glycol to form a precursor solution; dissolving a protective agent in triethylene glycol, adding the precursor solution drop by drop after heating and stirring, and then cooling to room temperature to obtain a high-entropy alloy nanoparticle sol; dissolving a carrier material in ethanol, carrying out constant-temperature ultrasonic treatment and crushing treatment, adding the high-entropy alloy nanoparticle sol and then carrying out crushing treatment again, and then sequentially carrying out stirring, washing and drying to obtain a product. The application further discloses the PtRhPdIrAu / C noble metal high-entropy alloy nanoparticles. The high-entropy alloy nanoparticles synthesized by the method have high intrinsic catalytic activity, can accelerate the kinetics of an ethanol oxidation reaction, and the nanoscale high-entropy alloy has a large surface area and high stability.

The present invention provides a titanium electrode group for wastewater treatment, which comprises a plurality of titanium electrode units. An insulating layer is provided between two adjacent titanium electrode units. Each titanium electrode unit includes a substrate and a surface coating layer, and the surface coating layer is provided with a microporous nanostructure. The substrate includes titanium and a doped metal. Among them, calculated by weight percentage, the doped metal accounts for 10-30%, and the balance is titanium. The doped metal includes at least one of chromium, nickel, manganese, ruthenium, rhodium, palladium, tantalum, iridium, platinum, and gold. The surface coating layer includes at least one of ruthenium chloride, iridium chloride, tantalum chloride, platinum chloride, palladium chloride, and tungsten chloride. With such a setting, the wastewater treatment effect and treatment efficiency are effectively improved.