1328 results about "Iridium" patented technology

The invention relates to an iridium dioxide catalyst and a preparation method and application thereof, the iridium dioxide catalyst is a material with a three-dimensional porous structure, and the three-dimensional porous structure comprises mesopores and macropores; the characteristic peak of rutile type iridium dioxide exists in the XRD spectrogram of the iridium dioxide catalyst. When the catalyst disclosed by the invention is used as an anode catalyst in water electrolysis hydrogen production, the loading capacity of the catalyst can be effectively reduced, the dispersity is improved, and meanwhile, the catalyst has better mass transfer effect and conductivity, higher catalytic activity and excellent stability.

An iridium-based catalyst, wherein iridium in the catalyst is in the form of crystalline iridium dioxide. Relative to the catalyst as a whole, the content of the iridium element by mass fraction is greater than 70%, and the apparent mass-to-volume ratio of the catalyst is not higher than 0.55 g / cm3. The catalyst has a large specific surface area, a high porosity, and a low apparent mass-to-volume ratio, and therefore has excellent mass transfer performance and apparent catalytic activity. A three-dimensional porous structure of the catalyst can improve the utilization rate of the iridium element, so that the loading capacity of iridium in a membrane electrode is reduced, and the catalyst has excellent stability. The provided preparation method is simple, convenient, and highly economical.

The invention belongs to the technical field of electrochemical treatment of wastewater, and relates to a Schwertmannite as well as a synthesis method and application thereof. The method aims at solving the technical problems that in the prior art, a method for preparing the Schwertmannite is low in yield, and when the Schwertmannite is prepared from acid mine wastewater, the cost is high, the yield is low, and the TFe precipitation rate is low. According to the synthesis method of the Schwertmannite, a titanium ruthenium iridium electrode serves as an anode, a platinum sheet serves as a cathode, the Schwertmannite is subjected to electrochemical synthesis in acid waste water, the pH value of the acid waste water is constant in the synthesis process, the acid waste water contains TFe and # imgabs0 # TFe is Fe < 2 + > and / or Fe < 3 + >, and the pH value of the acid waste water is 2.5-3.5, according to the scheme, the TFe precipitation rate is high, and the yield of the synthesized Schwertmannite is high. The invention further provides application of the Schwertmannite synthesis method, the synthesis method is applied to treatment of acid mine wastewater, lime is added for neutralization, the addition amount of the lime is 0.09 g / 150 mL to 0.11 g / 150 mL, the usage amount of the lime is reduced, and generation of waste residues is reduced.

The invention discloses a nonlinear Hall terahertz rectifying device which comprises a substrate, an oxide layer, an absorption layer and an electrode from bottom to top. The substrate is made of intrinsic high-resistance silicon, the oxide layer is made of silicon dioxide, the absorption layer is a Weel semimetal film, and the electrode is a four-end metal electrode. The Weel semimetal thin film is a niobium iridium tellurium (NbIrTe4) thin film. A cross-shaped structure is etched on the niobium-iridium-tellurium thin film, and a four-end metal electrode is manufactured through electron beam exposure, electron beam evaporation and a stripping technology. According to the invention, a simple cross-shaped geometric structure on Weel semimetal is utilized to couple an oscillating terahertz light field radiated along the longitudinal direction, and the generation of a direct current electric signal at the transverse end is realized through a nonlinear Hall effect induced by the Bell curvature, and the process does not involve the help of any external field. According to the invention, the broadband terahertz response of 0.02-0.82 THz is realized, the power consumption is low, and integration is facilitated.

The invention discloses a preparation method and application of a novel protonated layered iridium oxide H-IrO2 nanosheet, the iridium oxide nanosheet has a typical layered structure, a large number of protons are accommodated between layers of the layered structure, and the surface of the layered structure has the characteristics of rich metal iridium vacancy defects and local disorder. The preparation method comprises the following steps: 1) performing alkaline hydrolysis on iridium metal salt to obtain an amorphous iridium oxide precursor; 2) performing Joule heating treatment to obtain a layered iridium oxide nanosheet structure, and 3) performing acid proton exchange to obtain the protonated layered iridium oxide nanosheet. The novel layered structure shows high activity and excellent stability in catalysis of an acidic electrolyzed water anode oxygen evolution reaction, and due to the unique structure and excellent performance of the novel layered structure, the novel layered structure is expected to replace an existing commercial catalyst and plays a key role in a large-scale water electrolysis process.

The invention discloses a component gradient iridium tantalum coating anode and a preparation method thereof, the component gradient iridium tantalum coating anode comprises a titanium-based bottom layer, a middle layer and a surface active layer structure with component gradient, and the middle layer and the active layer are both prepared through a thermal decomposition method. And the intermediate layer is prepared on the titanium substrate and is composed of TiO2 / Ta2O5 mixed oxide. The surface active layer is prepared on the outer side of the middle layer and comprises a plurality of layers of IrO2 / Ta2O5 oxide coatings with different iridium-tantalum proportions. Compared with a traditional uniform coating anode, the prepared component gradient iridium tantalum coating anode can relieve the stress concentration phenomenon and reduce coating cracking, the service life of the anode is remarkably prolonged, and the catalytic activity of the anode is remarkably improved; the modified carbon nano tube is added into the active layer precursor solution, so that the conductivity change caused by component gradient is improved, and the cell voltage of the component gradient iridium tantalum coating anode is effectively reduced; and moreover, the iridium content is lower, and the preparation cost of the electrode is reduced.

The invention provides a multi-component platinum-bismuth-based intermetallic ordered nanosheet as well as a preparation method and application thereof, and relates to the technical field of multi-metal alloy catalysts. The multi-component platinum-bismuth-based intermetallic ordered nanosheet provided by the invention comprises a platinum element, a bismuth element and auxiliary metal elements, the auxiliary elements comprise 1-4 of an iridium element, a ruthenium element, an osmium element, a rhodium element, a tin element and a lead element, and the multi-component platinum-bismuth-based intermetallic ordered nanosheet has an intermetallic ordered structure and a two-dimensional nanosheet morphology. The multi-component platinum-bismuth-based intermetallic ordered nanosheet provided by the invention is stable in structure, is applied to a fuel cell as a catalyst, and has excellent electro-catalytic performance, including formic acid oxidation electro-catalytic performance and alcohol oxidation electro-catalytic performance. The invention provides the preparation method of the multi-component platinum-bismuth-based intermetallic ordered nanosheet, the preparation condition is mild, the operation is simple, and the problems of catalyst agglomeration and the like caused by conversion from high-temperature calcination to an ordered phase are effectively avoided.

The present invention provides a catalyst-layer-equipped electrolyte membrane and an application of the same, said catalyst-layer-equipped electrolyte membrane comprising: an anode catalyst layer containing an ionomer and an anode catalyst component that is composed of iridium-containing manganese dioxide, the molar ratio of iridium to manganese in the anode catalyst component being 0.011-0.182, and the logarithm log(amount of ionomer / amount of anode catalyst component) of the ratio of the amount of the ionomer to the amount of the anode catalyst component being −1.40 to −0.46; a proton exchange membrane; and a cathode catalyst layer.

The invention relates to an ultra-high-purity silver target material and a preparation method thereof, and belongs to the field of target materials, and the ultra-high-purity silver target material comprises the following raw materials in percentage by weight: 99.99% of high-purity silver, 0.05%-0.15% of palladium, 0.025%-0.075% of iridium, 0.1%-0.3% of neodymium and 0.1%-0.3% of praseodymium. According to the ultra-high-purity silver target material and the preparation method thereof, 5N-grade high-purity silver is adopted as a base material, trace palladium, iridium, neodymium, praseodymium and other elements are accurately added, the purity of the target material is remarkably improved and exceeds the purity range in the prior art, the hardness, strength and abrasion resistance of the target material are optimized through the innovative material design, and the service life of the target material is prolonged. The compact uniformity of the material is effectively improved and the internal stress is eliminated through grain refinement and multi-stage heat treatment, in addition, the isotropy of the target material is enhanced through the multi-directional forging process, the consistency of the performance in different directions is ensured, the mechanical performance of the target material is remarkably improved through the improvements, the target material can better adapt to the application environment with the high wear resistance requirement, and the service life of the target material is prolonged. And meanwhile, the conductivity, the reflectivity and the uniformity of a thin film prepared by using the target material are improved.

The invention discloses a low-cost hydrogen embrittlement-resistant titanium bipolar plate for an electrolytic bath and a preparation method of the low-cost hydrogen embrittlement-resistant titanium bipolar plate. The low-cost hydrogen embrittlement-resistant titanium bipolar plate comprises a surface-modified titanium base material, an in-situ hydrogen-resistant layer formed on the surface of the titanium base material, and a noble metal conductive layer prepared on the surface of the in-situ hydrogen-resistant layer, the surface roughness Ra value of the titanium base material subjected to surface modification is 2-3.5 microns; the in-situ hydrogen-resistant layer is a titanium oxide layer or an oxygen inclusion layer which is generated on the surface of the titanium substrate in situ in an air atmosphere or an oxygen-enriched atmosphere, and the thickness of the in-situ hydrogen-resistant layer is 50-200nm; the precious metal conducting layer is made of at least one of platinum, gold, iridium and palladium, and the thickness of the precious metal conducting layer is 20-150 nm. Through simple surface modification and in-situ generation of the hydrogen-resistant layer, the method has the advantages of high process maturity, low process complexity, low material cost and great cost advantage.

The invention discloses a molybdenum-doped iridium-based multicomponent alloy core-shell structure PEM water electrolysis catalyst and a preparation method thereof, relates to the technical field of electrocatalysts, and forms an electrocatalyst material which takes precious metal iridium as a shell and transition metal cobalt and iridium as a core and is doped with transition metal molybdenum in the core shell. As the transition metal molybdenum has good corrosion resistance, the structure can improve the stability of the catalyst, and the transition metal is low in price, so that the cost of the catalyst can be reduced, and the activity among multi-metal catalysts is improved; meanwhile, the performance of the catalyst can be further improved by removing redundant metal on the surface and in the catalyst. The catalyst prepared by the method is high in OER activity, good in stability, low in cost and easy to industrialize, overcomes the defects of existing PEM water electrolysis hydrogen production, and has important value in the field of electrochemical application and practical engineering.

The invention relates to an electrolyzed water catalyst and a preparation method and application thereof, the electrolyzed water catalyst is a three-dimensional porous material of elemental iridium and / or iridium oxide, the specific surface area of the electrolyzed water catalyst is greater than or equal to 65 m < 2 > / g, the porosity is greater than or equal to 40%, and the electrolyzed water catalyst has a mesoporous and macroporous structure. The electrolyzed water catalyst disclosed by the invention has a large specific surface area, high porosity and a three-dimensional porous structure of mesopores and macropores, so that the electrolyzed water catalyst has better mass transfer performance and apparent catalytic activity. The three-dimensional porous structure of the catalyst can improve the utilization rate of the iridium element, so that the loading amount of iridium in a membrane electrode is reduced, and the catalyst has excellent stability. The preparation method provided by the invention is simple and convenient, and has relatively high economical efficiency.

The invention discloses a lubricating oil preparation method, which comprises: contacting a raw material containing waste rubber with a catalyst in a closed container in a hydrogen atmosphere, and carrying out a catalytic cracking reaction to obtain a lubricating oil-containing product, the catalyst comprises a carrier, an acidic component and an active component loaded on the surface of the carrier, the active component is selected from at least one of a ruthenium elementary substance, a rhodium elementary substance, a platinum elementary substance, a palladium elementary substance, an iridium elementary substance and a nickel elementary substance; the acidic component is selected from at least one of silicotungstic acid, ammonium metatungstate, phosphotungstic acid and tungstic acid. The invention discloses a new path for preparing the lubricating oil by utilizing the waste rubber through a carbon = carbon hydrogenation and carbon-carbon bond breakage strategy under a relatively mild condition. According to the path, new application of waste rubber catalytic conversion is developed through C = C hydrogenation and C-C bond fracture strategies, and a new method for synthesizing lubricating oil with important application value is provided.

The invention provides a combined crucible and an oxide crystal growth method.The combined crucible is used for oxide crystal growth and comprises a first ceramic crucible, a second ceramic crucible, a third ceramic crucible and a fourth ceramic crucible, the graphite layer is arranged in the first ceramic crucible; the second ceramic crucible comprises a second containing space with the top open and the bottom closed, and the second ceramic crucible is arranged in the graphite layer. The combined crucible is designed by adopting an iridium-free scheme, so that the cost of the crucible can be greatly reduced.

The present disclosure includes mixed metal catalysts, including electrocatalysts, which can be applied to reduce the need for Ir, while exhibiting desirable performance. Mixed metal electrocatalyst materials on the invention catalysts comprising Ir, Ru and Pd, catalysts comprising Ru and Pd, and catalysts comprising Ir and Pd.

The invention belongs to the technical field of electro-catalysis, and particularly relates to an iridium cluster-loaded gallium oxide material as well as a preparation method and application thereof. The gallium oxide material loaded with the iridium cluster comprises flaky gallium oxide and the iridium cluster loaded on the surface of the gallium oxide, wherein the mass percentage content of iridium in the gallium oxide material loaded with the iridium cluster is less than or equal to 50%. The mass percentage of noble metal Ir in the material is less than or equal to 50%, so that the cost can be reduced; in the electrocatalytic oxygen evolution reaction, after voltage is applied, the gallium oxide material (Ir (at) Ga2O3) loaded with the iridium cluster can generate an in-situ reconstructed Ga-O-Ir interface through bias-induced Ga leaching, the Ga-O-Ir interface remarkably reduces the energy barrier of the oxygen evolution reaction, the reaction activity is greatly improved, and the electrochemical performance (overpotential and cycling stability) is remarkably improved.

An iridium-based catalyst. Relative to the total mass of the catalyst, the mass percentage content of an iridium element is 70% or higher. The apparent density of the catalyst is not higher than 0.55 g / cm3. The catalyst has a large specific surface area, high porosity and low apparent density, and therefore has excellent mass transfer performance and apparent catalytic activity. A three-dimensional porous structure of the catalyst can improve the utilization rate of the iridium element, thereby reducing the loading of iridium in a membrane electrode, and the catalyst has excellent stability. A preparation method provided is simple and convenient, and has relatively high economic efficiency.

Disclosed herein is a catalyst including a multicomponent alloy including a seed and al least four elements. The seed includes at least one platinum group metal, wherein the platinum group metal includes platinum, ruthenium, iridium, palladium, or rhodium. Methods of preparing the catalyst are also provided herein.

The invention relates to a method for manufacturing a bipolar plate (2), comprising the following steps: - Provision of two steel half-sheets (3, 4), wherein at least one of the two half-sheets (3, 4) has an embossed structure (5), - Construction of a three-dimensional metal structure (7) from at least one powder (12) of a metal different from the steel of the half-sheets (3, 4), wherein the metal is selected from the group comprising titanium, titanium alloys, nickel, nickel alloys, chromium, chromium alloys, ferrochrome alloys, copper, copper alloys, silver, silver alloys, or gold, platinum, iridium, rhodium, ruthenium and their alloys, on a first half-sheet (3) of the two half-sheets (3, 4) by means of a laser (10) with green laser light and consequently a wavelength in the range of 495 nm to 550 nm, and - Forming a material-bonded connection of the 3D metal structure (7) with a second half-sheet (4) of the two half-sheets (3, 4) using the same laser (10), wherein the half-sheets (3, 4) are joined to form a bipolar plate (2). The invention further relates to a bipolar plate (2) for an electrochemical cell (20).

The invention discloses a nano-alloy catalyst for anion exchange membrane electrolyzed water and a preparation method of a membrane electrode of the nano-alloy catalyst, when any one of manganese salt, cerium salt, chromium salt, cobalt salt, lanthanum salt, ruthenium salt and iridium salt is not added, NiFe binary alloy powder is obtained, the content of Ni is 90%-100%, and the content of Fe is 0%-10%; when any one of manganese salt, cerium salt, chromium salt, cobalt salt, lanthanum salt, ruthenium salt and iridium salt is added, NiFe ternary alloy powder is obtained, the content of Ni is 76%-96%, the content of Fe is 4%, and the content of the third element is 0%-20%. The nano-alloy catalyst material for anion exchange membrane water electrolysis prepared according to the invention is good in corrosion resistance and high in stability, the total water splitting efficiency is further improved, the synthesis method is simple, the used metal salt is low in cost, the metal salt can be uniformly loaded on a substrate carrier through spraying, and industrial application of total water splitting under high current density is easy to realize.

The invention discloses iridium series mixed metal oxide titanium anode plate welding equipment, and relates to the technical field of welding equipment, the iridium series mixed metal oxide titanium anode plate welding equipment comprises a welding rack, a welding mechanism and an anode plate clamp, and the welding rack comprises adjustable supporting legs. The equipment stability is ensured through the adjustable supporting feet and the workbench structure, the anode plate clamp is matched with the first servo motor and the second servo motor on the portal frame to drive the threaded rod and the adjusting sliding block structure, the welding mechanism can be accurately positioned on the X / Y axis, flexible adjustment of a three-dimensional space welding path is achieved in combination with Z-axis downward pressing control of the telescopic cylinder, and the welding efficiency is improved. The integration of the process database and the touch display screen simplifies the parameter calling process, the microcontroller feeds back welding data in real time through the visual monitoring assembly, the consistency of the welding quality is effectively guaranteed, the protection assembly reduces the harm of intense light radiation to operators, and then the automation efficiency and safety are improved. And the titanium anode plate welding efficiency and the finished product qualification rate are remarkably improved.

The invention relates to an iridium-based catalyst, a preparation method thereof and application of the iridium-based catalyst in proton exchange membrane water electrolysis hydrogen production, the iridium-based catalyst is a material with a three-dimensional porous structure, and the iridium-based catalyst contains more than 80% by mass of iridium element; a characteristic peak of elemental iridium exists in an XRD spectrogram of the iridium-based catalyst. Compared with an existing iridium black catalyst, when the iridium-based catalyst disclosed by the invention is used for producing hydrogen by electrolyzing water, the usage amount of the catalyst can be reduced, and meanwhile, the iridium-based catalyst has better mass transfer effect and conductivity, higher catalytic activity and excellent stability.

The invention discloses an anode composite catalyst layer and slurry thereof, a preparation method and a membrane electrode, the anode composite catalyst layer is located between a proton exchange membrane and a gas diffusion layer of the membrane electrode, the anode composite catalyst layer comprises an iridium catalyst layer, the iridium catalyst layer has a first surface and a second surface which are opposite, the first surface faces the proton exchange membrane, and the second surface faces the gas diffusion layer. The second surface faces the gas diffusion layer, and the iridium catalyst layer comprises a first ionomer and an iridium catalyst dispersed in the first ionomer; the platinum conducting layer is provided with a third surface and a fourth surface which are opposite to each other, the third surface is in contact with the second surface of the iridium catalyst layer, the fourth surface faces the gas diffusion layer, and the platinum conducting layer comprises a second ionomer and platinum nano-particles which are dispersed in the second ionomer and have the particle size ranging from 10 nm to 500 nm. According to the anode composite catalyst layer, the membrane electrode has relatively low contact resistance and excellent stability.

The invention discloses a Ti / IrO2-SnO2-SbO2 gradient active coating anode with low cost and high stability and a preparation process of the Ti / IrO2-SnO2-SbO2 gradient active coating anode. The gradient active coating is characterized in that the gradient active coating is composed of 3-5 layers, the total thickness is 5-15 microns, the thickness of each layer is 1-5 microns, the molar percentage content of iridium in a bottom layer is 0-5%, the sum of the molar percentage content of tin and antimony is 95-100%, the molar percentage content of iridium in a surface layer is 10-20%, the sum of the molar percentage content of tin and antimony is 80-90%, and the thickness of each layer is 1-5 microns. The molar percentage content of iridium from the bottom layer to the surface layer is sequentially increased from 2% to 10%, the molar percentage content of tin and antimony is sequentially reduced from 2% to 10%, and the total iridium loading amount in the gradient active coating is 0.05-0.2 mg / cm < 2 >. The preparation method comprises the three steps of titanium substrate pretreatment, precursor salt alcohol solution preparation and gradient active coating preparation. By adopting a gradient coating mode, the thermal stress between the coating and the titanium substrate in the preparation process is remarkably reduced, the consumption of noble metal is reduced, the oxygen evolution activity of the anode is improved, and the service life of the anode is prolonged. The method is simple to operate and low in cost, and has remarkable industrialization advantages.

The invention discloses a sulfide solid electrolyte, a preparation method thereof and an all-solid-state battery. The sulfide solid electrolyte comprises Li, P, S, halogen and a soft acid element, and further comprises a sulfydryl group; the soft acid element comprises at least one of titanium, erbium, bismuth, tin, cadmium, iridium, osmium, indium or antimony. The sulfide solid electrolyte provided by the invention has high ionic conductivity, low sensitivity to water and good air stability.

The invention discloses a high-precision point iridium welding device and process, and relates to the technical field of pen point welding. The device comprises a conveying assembly capable of moving along an annular path, a welding assembly arranged below the conveying path and positioning tools arranged corresponding to conveying blocks. The conveying assembly comprises a plurality of conveying blocks, and the positioning tool is used for inserting a to-be-welded pen point base material; the welding assembly comprises a hopper, a feeding pipe coaxially connected with the hopper in a sliding mode, an electrode ring fixed to the top end of the feeding pipe and an inverted-cone-frustum-shaped iridium particle groove formed in the top end. The hopper can be filled with iridium particles to be welded, the feeding pipe can ascend and descend in the vertical direction, and the iridium particle groove can bear one iridium particle. Through cooperation of the conveying block and the positioning tool, quick assembly and feeding of the pen point base material are facilitated, the feeding difficulty is reduced, and manual feeding is more labor-saving.

The invention belongs to the technical field of organic electroluminescent materials, and provides an iridium-containing heterocyclic phosphorescent doping material and an organic electroluminescent device.The doping material has a compound general formula shown in the formula I. Quinoline and a naphthalene ring are connected through silane or germane, and a silicon or germanium six-membered heterocyclic structure is formed. And reacting with iridium metal and a diketone monomer to obtain the iridium metal heterocyclic phosphorescent organic light-emitting material. The heteroatom silicon or germanium in the material can adjust molecular orbital HOMO and LUMO energy levels, and the polarity effect of heteroatoms promotes electron migration, reduces interface potential barriers and electron injection barriers, reduces carrier injection loss and improves carrier mobility, so that driving voltage is reduced, and the external quantum efficiency of a device is improved. In addition, the silicon or germanium heterocyclic ring has better rigidity, so that the overall stability of the structure is enhanced, and the rigid structure can prolong the service life of the device.

The invention belongs to the technical field of oxygen evolution reaction catalysts, and discloses a high-entropy alloy nano iridium-based catalyst as well as a preparation method and application thereof. The catalyst comprises more than one of a core-shell icosahedron nanocrystal or a high-entropy alloy nanocage; preparation of the core-shell icosahedron nanocrystals: in a protective atmosphere, uniformly mixing hexadecyl trimethyl ammonium chloride, oleylamine, glucose, carbon nanotubes and transition metal salt to obtain a mixture, and heating the mixture to obtain the core-shell icosahedron nanocrystals; the preparation method of the high-entropy alloy nanocage comprises the following steps: dispersing core-shell icosahedron nanocrystals into water containing polyvinylpyrrolidone to obtain a solution A; dissolving ferric chloride, potassium bromide and concentrated hydrochloric acid in water to obtain a solution B; and the solution A is added into the solution B, ultrasonic treatment and uniform mixing are conducted, heating and stirring are conducted, and the high-entropy alloy nanocage is obtained. The catalyst provided by the invention has high catalytic activity, ultrahigh mass activity and excellent stability. The catalyst provided by the invention is used in an oxygen evolution reaction.

Sensors containing one or more metal oxides as the sensor material are used for detecting pathogen-derived VOCs, e.g., VOCs emitting from infectious wounds. The metal oxides may contain one or more metal elements selected from aluminum, antimony, bismuth, boron, cerium, chromium, cobalt, copper, gold, indium, iridium, iron, lanthanum, lead, manganese, molybdenum, nickel, niobium, osmium, palladium, platinum, rhodium, ruthenium, selenium, silicon, silver, tantalum, tellurium, terbium, tin, titanium, tungsten, vanadium, ytterbium, yttrium, zinc, and zirconium. A sensor device may have one or more sensors, which detects and records a variety of VOCs that are indicative of existence of pathogens, and the pathogens are associated with dieses and / or infections.

The invention discloses a titanium-based-iridium tantalum oxidation coating anode and a preparation method and application thereof, and belongs to the technical field of anode preparation, and the preparation process of the titanium-based-iridium tantalum oxidation coating anode comprises the steps that a titanium substrate is brushed with a solution containing a tantalum source A, then sintering is conducted, brushing-sintering is repeated, and a tantalum-coated titanium substrate is obtained; the tantalum-coated titanium substrate is brushed with the iridium-tantalum oxidation coating liquid, then sintering is carried out, and brushing-sintering is repeated, so that the tantalum-coated titanium substrate is obtained; the iridium-tantalum oxidation coating liquid contains a tantalum source B, an iridium source and a zirconium source; in the iridium tantalum oxidation coating liquid, the mass ratio of tantalum to iridium is (6-7): (4-5), according to the preparation method provided by the invention, through two times of brushing, the tantalum content in the titanium-based-iridium tantalum oxidation coating anode is more than 5% greater than the iridium content, and when the titanium-based-iridium tantalum oxidation coating anode is used for an alkaline citric acid electroplating system, the decomposition of a complexing agent can be effectively inhibited, the components of the electroplating liquid are maintained to be stable, so that the quality of a plating layer is ensured, and the service life of the plating layer is prolonged. The maintenance cost of the plating solution is reduced and the service life is prolonged.