249 results about "Platinum Metal" patented technology

The invention discloses a preparation method of a bionic cornea stroma lens for refractive correction, which comprises the following steps: solution preparation: dissolving type I collagen in an acetic acid solution, adding a film aid, fully stirring, and centrifugally defoaming to obtain a type I collagen composite solution; the I-type collagen composite solution is poured into an assembling groove, the curvature radius of titanium metal is set to be 6.8-8.0 mm, the titanium metal serves as a working electrode material, platinum metal serves as a counter electrode material, current parameters are set according to the needed thickness of the lens blank, the density is 3.50-6.50 mA / cm < 2 >, and the thickness of the lens blank is set to be 3.50-6.50 mA / cm < 2 >; a high-transparency cornea embryo material which is uniform in curvature in all directions and similar to human cornea fiber structure arrangement is formed after electrochemical assembly and cross-linking curing, accurate cutting machining is carried out through excimer laser, a concave / convex matrix lens with the needed correction degree is obtained, the correction precision is high after cornea interlayer implantation, and the correction precision is high. And meanwhile, the compound has excellent performance in the aspects of in-vivo stability and biological safety.

The present invention discloses a platinum electroplating solution, a preparation method thereof and an application in semiconductors, which comprises the following raw materials: 0.5-10 g / L of platinum salt PEP, 15-35 g / L of ethylenediamine sulfate, 5.0-29 g / L of malonic acid, 5.0-40 g / L of ammonium acetate, the balance being ultrapure water and ammonia water; the pH value of the platinum electroplating solution is adjusted to 7.0 with ammonia water; the method for preparing the coating comprises the following steps: S1, degreasing and pickling the semiconductor device to be processed; S2, selecting corresponding electroplating conditions and configuring a corresponding anode and its anode mask; S3, performing electroplating; S4, automatically adding the platinum salt PEP solution in a linked manner; S5, adjusting the pH value of the platinum electroplating solution; S6, stopping electroplating after reaching the target coating thickness or the preset electroplating time. The platinum metal film formed by the present invention has excellent morphology, uniform distribution, high wear resistance and excellent compactness.

The invention provides a method for measuring a sample hole, and relates to the technical field of semiconductors, and the method comprises the steps: marking a first target surface of a to-be-measured sample, and determining the region range of a target hole of the to-be-measured sample located in the to-be-measured sample through the first target surface; coating the first target surface of the to-be-detected sample to form a glue protective layer; depositing metal on the glue protection layer to form a metal protection layer; the material of the glue protection layer comprises M-Bond 610, and the material of the metal protection layer comprises metal platinum; the thickness of the glue protection layer is 500 nm to 1 [mu] m, and the thickness of the metal protection layer is 300 nm to 600 nm; etching along the second target surface of the to-be-tested sample until the target hole is exposed; sampling the to-be-tested sample with the exposed target hole to obtain a sample piece with the target hole; detecting a target hole; after the first target surface of the to-be-detected sample is coated to form the glue protection layer, the method further comprises the following steps: performing vacuum pumping to remove gas in the target hole.

The present invention discloses a highly active cathode material catalyst for lithium-sulfur batteries and a preparation method thereof. The catalyst comprises a flaky nitrogen-doped carbon-based support and platinum metal nanoclusters uniformly embedded on the support surface. The platinum metal nanoclusters are 1-10 nm in size and have a mass ratio of 10-20% on the support. The catalyst is then processed through molten sulfur to serve as the cathode material for lithium-sulfur batteries. The catalyst is prepared by physical mixing a cyanamide compound and an organometallic molybdenum salt, or by adding a defective carbon material, and then directly carbonizing the material in an inert atmosphere in a tube furnace. The high-surface-weight-weight-weight-weight-weight-weight-sheet flaky nitrogen-doped carbon conductive material, with uniform distribution of platinum metal nanoclusters, physically adsorbs and chemically catalyzes polysulfides formed during the charge and discharge process on the positive electrode side of the lithium-sulfur battery, capturing the polysulfides and eliminating the "shuttle effect" during charge and discharge, ultimately improving the electrochemical performance of the electrode material. The initial discharge specific capacity can reach up to 1314.2 mAh / g, and after 100 cycles, the specific capacity decay is only 20%. This catalyst material has broad application prospects for lithium-sulfur batteries.

The invention discloses a film platinum resistor temperature sensor, which comprises an aluminum oxide insulating substrate, a titanium film, a platinum film resistor layer, a protective layer, a platinum metal lead and encapsulating slurry, the titanium thin film is deposited on the surface of the aluminum oxide insulating substrate, the platinum thin film resistance layer is deposited on the surface of the titanium thin film, the protection layer is deposited on the surface of the platinum thin film resistance layer, the platinum metal lead is welded on a bonding pad on the platinum thin film resistance layer, and the packaging slurry is coated on the protection layer and the platinum thin film resistance layer. According to the invention, the platinum film temperature sensor with high precision, good consistency, wide temperature measurement range and strong stability is obtained through arrangement and allocation of a multi-layer structure.

The invention discloses a tetrapyridine pyrene-based metal organic cage as well as a preparation method and application thereof, and belongs to the technical field of supramolecular chemistry. The metal organic cage is prepared from a tetrapyridine pyrene ligand, a tetradentate sodium carboxylate ligand and a cis-platinum metal ligand, and the metal organic cage is endowed with photocatalytic performance by introducing a photosensitive group into the ligands, so that the metal organic cage can effectively degrade perfluorooctanoic acid through a photo-induced electron transfer mechanism, thereby realizing an adsorption-degradation integrated function. The metal organic cages can release effective reactive oxygen species under the irradiation of a 365 nm ultraviolet lamp and can degrade the perfluorooctanoic acid, the defluorination rate can reach 80%, the perfluorooctanoic acid is degraded into a short-chain compound, and a photodegradation system is artificially prepared.

The invention discloses a membrane electrode with a nanowire conductive network, and a preparation method and application thereof, and belongs to the technical field of membrane electrodes and preparation thereof. The membrane electrode comprises a cathode catalyst layer, a proton exchange membrane layer, an iridium-based catalyst layer and a nanowire conductive grid layer which are arranged in sequence, the nanowire conductive grid layer is formed by metal nanowires, perfluorinated sulfonic acid resin and an organic polymer thickening agent; the metal nanowire is one or more of a platinum nanowire, a gold nanowire and a palladium nanowire. Due to the addition of the nanowire conductive grid layer, the thickness of the catalyst layer of the anode can be increased; the catalytic material for forming the grid is mainly slender metal platinum nanowires (gold and palladium nanowires), the electric contact between the anode catalytic layer and the PTL can be improved, the utilization rate of the catalyst is increased, the nanowires in the grid can be cross-linked to form a conductive network, the total amount of precious metal can be reduced, the cost is remarkably reduced, and the service life of the anode catalytic layer is prolonged. Meanwhile, excellent electrochemical performance is ensured.

The present invention discloses a hydroisomerization catalyst and a preparation method thereof, and a mixed C4 olefin hydroisomerization method, the hydroisomerization catalyst comprises a carrier and an active component loaded on the carrier, the carrier comprises a mixture of a carrier matrix and a modified metal, the modified metal is selected from at least one of VIB group metals, and the active component is selected from at least one of C4-C4 olefin and C4-C4 olefin. The active component comprises a metal M and / or an oxide thereof, and the metal M is selected from at least one of metal palladium, metal platinum, metal rhodium and metal ruthenium. The catalyst can catalyze the hydroisomerization conversion of butene-1 into butene-2, and has the advantages of high butene-1 conversion rate and high butene-2 selectivity.

The present invention provides a Pt / CMK-3 nanocomposite for a CO detection sensor, with metallic Pt as the carrier and CMK-3 as the additive loaded on the carrier. Among them, the mass ratio of the CMK-3 additive to the carrier Pt is 1-12:100. The preparation method is to first perform acidification pretreatment on CMK-3 to obtain the pretreated precursor CMK-3, and then load the precursor CMK-3 onto the noble metal Pt by a one-step hydrothermal method to obtain the Pt / CMK-3 nanocomposite. The Pt / CMK-3 nanocomposite of the present invention, as an electrode material for an electrochemical gas sensor, can improve the sensitivity to the target gas CO, shorten the response / recovery time, and can reduce the usage amount of platinum metal and lower the cost.

The application discloses a kind of catalyst and its preparation method and application.The catalyst includes nanostructured Mo2C carrier and PtO nanocluster loaded in the Mo2C carrier.The method includes the following steps: nanostructured Mo2C carrier is mixed with the solution of platinum metal compound, and the mixed solution is obtained;The mixed solution is stirred at 50-95 DEG C for 0.5h-5h, and continues to be inhaled reaction atmosphere;After reaction, after filtration, washing and drying, the catalyst is obtained.The application can accurately control the synthesis of PtO, and the large specific surface area and surface rich overhanging key of Mo2C nanostructure are used to provide sufficient anchoring site for PtO nanocluster, greatly improve the uniformity, dispersibility, stability of PtO nanocluster loaded on the surface of Mo2C material, show good electrocatalytic hydrogen evolution performance, greatly improve the effective loading rate of Pt and reduce the amount of Pt, reduce the cost of catalyst.

The application provides an alloying modification method of a platinum catalyst, relates to the field of electrochemical catalysis, and particularly relates to the following steps: mixing 5% of a platinum carbon catalyst and a phytic acid solution uniformly, performing freeze-drying treatment, performing one-time pyrolysis, sulfuric acid treatment, and ultra-pure water cleaning and suction filtration, and drying to obtain a powder; adding ferrous sulfate and 1,10-phenanthroline, performing second-time pyrolysis, sulfuric acid treatment, and ultra-pure water cleaning and suction filtration, and drying to obtain an alloying modification carbon-based catalyst. The method is alloyed by the metal platinum and a transition metal, effectively improves the activity and stability of the catalyst, reduces the use amount of the noble metal platinum, and effectively reduces the manufacturing cost of the catalyst; and the alloying modification carbon-based catalyst obtained by the method can be used for the preparation of a primary zinc-air battery, a rechargeable zinc-air battery and the like.

The application belongs to the technical field of luminescent materials, and particularly relates to a binuclear platinum complex and application thereof. The binuclear platinum complex has the structure shown in formula (1), and when used in an OLED, especially in a blue light emitting region, the binuclear platinum complex exhibits enhanced phosphorescence quantum yield, good luminescence stability, high luminescence efficiency, and is suitable for use as an emitter material in OLED application. The metal platinum complex of the application can obtain an organic electroluminescent device with deep blue phosphorescence and improved luminescence efficiency, and the luminescent device has good thermal stability. The binuclear platinum complex has the advantages of narrow emission spectrum, high stability and high efficiency by adjusting the structure of the ligand around the metal center and the structure of the substituent on the ligand to control the photophysical properties, and has wide application prospects in many fields such as OLED display and lighting.

The device comprises an electrolytic tank and a positive electrode tank, a tank opening of the electrolytic tank faces upwards, an inlet pipe and a discharge pipe are arranged on the left side edge and the right side edge of the electrolytic tank correspondingly, a cathode piece is arranged in the electrolytic tank, and a first communicating tank is formed in the front end in the electrolytic tank; a communicating tank II is arranged on one side, close to the electrolytic tank, of the positive electrode tank, an exchange membrane is arranged between the communicating tank I and the communicating tank II, an exhaust pipe is arranged at the top of the positive electrode tank, a platinum metal electrode is arranged in the positive electrode tank, and a receiving end is arranged at the top of the platinum metal electrode; according to the invention, the electrolytic tank, the positive electrode tank, the solar power supply unit and the gas supply unit are matched, so that CO2 can be efficiently captured from low-concentration CO2 gas (such as air), and the captured CO2 is subjected to a co-electrolysis reaction by utilizing electrolyte to generate carbon monoxide and hydrogen by utilizing an electrochemical reaction of solar power supply, so that the synergistic interaction of CO2 emission reduction and recycling is realized.

The application relates to the technical field of platinum catalysts, and particularly discloses an anti-yellowing platinum catalyst capable of prolonging the curing time and a preparation method thereof. The platinum catalyst comprises a platinum metal compound, an alkenyl-containing siloxane compound, an alkaline metal salt, an organic solvent and a catalyst carrier; wherein the mass ratio of the platinum metal compound, the alkenyl-containing siloxane compound, the alkaline metal salt and the organic solvent is 1:(8-20):(1.2-3):(6-20). The platinum catalyst has the advantages of being capable of prolonging the curing time and having the anti-yellowing performance, and has a wide application scenario.

This invention discloses a method for preparing a Pt / C catalyst by vacuum impregnation with an ionic liquid and its application. First, a carbon support is mixed with water and alcohol, ball-milled, and then mixed with nitric acid to obtain an acid-treated carbon support. Next, a precursor solution is prepared by mixing a platinum salt, an organic solvent, a surfactant, and water, and then an imidazole ionic liquid is added to it in portions to obtain a precursor solution containing the ionic liquid. This solution is mixed with the acid-treated carbon support and vacuum ball-milled to obtain a mixed slurry. This slurry is then vacuum freeze-dried to obtain a freeze-dried powder. Reduction and heat treatment are then performed to obtain the ionic liquid-doped Pt / C catalyst. The catalyst is then coated onto both sides of a proton exchange membrane to form a catalytic layer. Through this method, this invention not only effectively inhibits the aggregation, migration, and ripening of platinum particles during electrochemical processes, thereby significantly improving the catalyst's durability, but also enhances the catalyst's proton conductivity under low humidity conditions.

The invention relates to the technical field of catalyst recovery, and discloses a method for recovering platinum from a titanium-zirconium composite oxide platinum-loaded waste catalyst, which comprises the following steps: (1) roasting the platinum-loaded waste catalyst which takes TiO2-ZrO2 as a carrier, and crushing and grinding; (2) uniformly mixing the ground waste catalyst with disulfate, and carrying out roasting reaction to obtain a melt I; stirring and dissolving the melt I and an acid solution, and filtering to obtain filtrate and a filter cake I; (3) repeating the reaction in the step (2) on the filter cake I to obtain a filter cake II; (4) oxidizing and dissolving the filter cake II with hydrochloric acid and an oxidizing agent to obtain a platinum-containing solution; and (5) separating and purifying the platinum-containing solution to obtain metal platinum. According to the method, the carrier in the waste catalyst is decomposed by adopting the disulfate, and then the waste catalyst is oxidized and dissolved by adopting the hydrochloric acid and the oxidizing agent, so that the platinum recovery cost is reduced, the environmental pollution is reduced, the production efficiency is improved, and the cyclic utilization of resources is facilitated.

The present invention belongs to the technical field of bonded copper wires, and particularly relates to a palladium-plated bonded copper wire and its preparation process. Copper, platinum, cobalt, zirconium, magnesium, strontium, rare earth metal elements and silicon are mixed to form a copper-based bonded wire material. The functions of the metals platinum, cobalt and zirconium and the combined silicon help to improve the internal grain distribution structure of the copper wire, improve the mechanical properties such as the tensile strength of the copper wire, the balling degree and the oxidation resistance; the magnesium, strontium and rare earth metal elements used help to improve the bonding performance of the bonded copper wire. The primary and secondary palladium plating processes are adopted to make the bonded copper wire have excellent tensile properties, bonding properties and oxidation resistance.

The application provides a cracking catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: preparing seeds by controlling pH value and a two-stage crystallization process, taking a molecular sieve material as raw material, and preparing a mother liquor by dissolving aluminum and silicon treatment and mixing of the two by adjusting the proportion of each raw material, then through aging treatment and hydrothermal crystallization treatment, a 13X molecular sieve with a high silicon to aluminum ratio, a high specific surface area and a high pore volume and a multi-level pore structure is prepared; the 13X molecular sieve is immersed in a carbon precursor solution for carbon modification treatment, immersed in a platinum precursor solution for treatment, pre-baked in an inert gas atmosphere, and calcined in an air atmosphere, so that platinum is combined with the framework of the 13X molecular sieve in the form of highly dispersed platinum metal oxide and platinum metal, forming a platinum-containing 13X molecular sieve cracking catalyst with stable structure and high catalytic activity, and the problems of low stability of the cracking catalyst in the prior art and lack of resource utilization of molecular sieve waste in the preparation process are solved.

The invention discloses a preparation method of a PtAl coating. The preparation method of the PtAl coating comprises the following steps that platinum is electroplated on the surface of a base body, heat treatment is conducted under the vacuum condition, and a platinum metal layer is prepared; and gas phase aluminizing is conducted on the surface of the side, away from the base body, of the platinum metal layer, after gas phase aluminizing is finished, furnace cooling is conducted to 600-800 DEG C, the platinum metal layer is placed in the air environment to be cooled, and the PtAl coating is prepared. According to the provided preparation method of the PtAl coating, after gas-phase aluminizing is finished, furnace cooling is conducted to 600-800 DEG C, the PtAl coating is placed in an air environment to be cooled, pre-oxidation is conducted in the aluminizing process, a pre-oxidation film of alpha aluminum oxide is formed on the surface of the coating, and the service life of an oxidation film of a base body is prolonged.

The present invention belongs to the field of organic electroluminescence, and specifically relates to a tetradentate cyclometalated platinum (II) complex guest phosphorescent material based on a 2,3',5'-substituted 1,1'-biphenyl structure and the use thereof. In the present invention, by introducing alkyl or aryl to the positions 2, 3' and 5' of 1,1'-biphenyl to increase the steric hindrance, red shift or luminescence quenching caused by molecular aggregation can be avoided. Deuteration at the periphery of a cyclometalating ligand can improve the stability of the material, so that the phosphorescent material provided by the present invention has good chemical stability and thermal stability and can be easily used for manufacturing evaporation-type OLED devices. Organic electroluminescent devices manufactured by using the complex of the present invention as a light-emitting layer material have significant improvement in both current efficiency and service lifetime, thereby achieving great application prospects in the fields of OLED display and illumination.

The present invention relates to the field of organic electroluminescent material preparation technology, and particularly, to a fluorenocarbazole tetradentate platinum(II) complex, an organic light-emitting diode material, a device, and an apparatus. By means of introducing a fluorene ring system at the 3,4-position of carbazole and introducing a substituent at the ortho-position of the benzene ring at the upper left, a novel tetradentate platinum(II) complex-based blue phosphorescent material is obtained. The proportion of components of the localized state (3LE) is increased in the excited triplet state of the cyclic tetradentate platinum(II) complex, thereby achieving a low shoulder peak, improved emission color purity of material molecules, and enhanced stability of materials. The provided materials all have good chemical stability and thermal stability, thereby facilitating the preparation of evaporation-type OLED devices. The organic electroluminescent device manufactured using the above-described compound as the light-emitting layer has a significant improvement in both the blue light index (BI) and service life, and can also reduce the turn-on voltage.

This invention relates to a novel honeycomb activated carbon for adsorption-desorption catalytic combustion processes, belonging to the field of activated carbon technology. The novel honeycomb activated carbon comprises the following raw materials: a composite matrix, a composite activator, cobalt nitrate hexahydrate, zirconium oxynitrate hydrate, platinum nitrate, polyvinylpyrrolidone, and hexadecylamine. This invention uses beet pulp, enoki mushroom residue, and king oyster mushroom residue as the composite matrix to provide a large number of hydroxyl groups. Potassium bicarbonate and triammonium phosphate are used as the composite activator to dehydrate, condense, and interconnect the numerous hydroxyl groups on the composite matrix, effectively increasing the pore structure of the system and providing a large number of adsorption sites, facilitating the adsorption and mass transfer of VOCs. Simultaneously, the introduction of cobalt, zirconium, and platinum metal elements significantly improves the catalytic combustion performance of the system for VOCs. The addition of polyvinylpyrrolidone and hexadecylamine further enhances the catalytic combustion performance of the system.

The invention belongs to the technical field of preparation of organic electroluminescent materials, and particularly relates to a tetradentate ring metal platinum (II) complex, an electronic device and application of the tetradentate ring metal platinum (II) complex. The invention provides a tetradentate platinum (II) complex obtained by introducing 2, 6-diisopropyl phenyl to different positions of carbazole, and the complex has a structure as shown in a formula (I). The introduction of 2, 6-diisopropyl phenyl reduces the interaction between molecules, the group has good solubility, so that the platinum complex has good spin-coating performance, and the provided compound has good chemical stability, can improve and balance the transport of holes and electrons, enables the energy transmission between a subject and an object to be more efficient, and has a good application prospect. Specifically, the compound or the composition provided by the invention is used for improving the current efficiency and prolonging the service life of the organic light-emitting device, and has a great application prospect in the fields of OLED display and illumination.

The invention provides a precious metal platinum-doped nano zinc oxide photocatalyst, a preparation method and application, and relates to the technical field of catalyst synthesis. The method specifically comprises the following steps: pretreating a natural biological material with a hierarchical porous structure as a soft template, and freeze-drying to obtain a Zn < 2 + > supported biological template; placing the template in a mixed solvent, performing microwave hydrothermal synthesis to obtain a ZnO (at) biological template, and performing centrifugal washing; preparing a doping solution containing noble metal ions, dissolving the ZnO (at) biological template in the doping solution containing noble metal ions, and irradiating under ultraviolet light; calcining in an air atmosphere, and then immersing a product into a citric acid solution to obtain the catalyst. By combining a natural biological template with microwave-assisted hydrothermal and in-situ photochemical reduction technologies, uniform doping of ultralow noble metals (Pt, Pd, Au and the like) in a ZnO hierarchical porous structure is realized, and material morphology regulation and control and active site construction are synchronously completed.

The present invention discloses a low-load Pt / C catalyst derived from a covalent organic framework, a preparation method, and an application thereof, and belongs to the field of electrocatalysis. The present invention utilizes a covalent organic framework material coordinated with a platinum metal salt as a precursor, and synthesizes a low-load integrated Pt / C nanomaterial by a simple carbonization method in a mixed atmosphere of argon / ammonia. Compared with commercial Pt / C with a mass fraction of 20%, the Pt / C nanomaterial prepared by the present invention has an oxygen reduction performance far greater than that of commercial Pt / C, and a stability performance superior to that of commercial Pt / C. Due to its higher nitrogen content and porous characteristics, the catalyst of the present invention has better catalytic performance and stability than commercial Pt / C, and the obtained low-load Pt / C catalyst derived from a covalent organic framework exhibits excellent redox catalytic performance. The catalytic activity decays only after 10,000 cycles. The method of the present invention is simple to operate, highly controllable, and has a certain degree of universality.

The application discloses a composite catalyst for low-temperature catalysis of organic pollutants and a preparation method and application thereof. The catalyst is prepared by taking TiO2 as a carrier, a copper-manganese-cerium composite oxide and a loaded noble metal platinum as active components of the catalyst; the weight percentage of the copper-manganese-cerium composite oxide is 10%, the weight percentage of the TiO2 carrier is 80%-90%, and the weight percentage of the noble metal platinum is 0.1%-1%; in the copper-manganese-cerium composite oxide, the molar ratio of copper, manganese and cerium is 1:(3-4):(0.5-1). The material is synthesized by adjusting the proportion of tetrabutyl titanate, glacial acetic acid and ethanol through a sol-gel method to obtain TiO2 with an ordered mesoporous structure, and the loaded noble metal platinum and copper-manganese-cerium metal oxide enable the material to have excellent low-temperature catalytic performance, a significantly improved organic pollutant removal efficiency, a greatly reduced production cost, and good adaptability to large-scale production and industrial application prospects.

The present invention relates to the technical field of the preparation of circularly polarized luminescent materials, and particularly relates to a central chirality-induced helical chirality tetradentate cyclometalated platinum(II) complex, an electronic device and applications thereof. The central chirality-induced helical chirality tetradentate cyclometalated platinum(II) complex provided by the present invention has a general formula structure as shown in formula (I) or (I'), wherein (I) and (I') are enantiomers of each other: the helical chiral metal complex molecule can autonomously induce the entire tetradentate ligand to coordinate with metal ions in a manner with small steric hindrance through the central chiral fragment L<supgt;a< / supgt; in the tetradentate ligand, forming an optically pure helical chiral metal complex circularly polarized luminescent material. There is no need for chiral resolution, and it has high chemical stability, and has important applications in circularly polarized luminescence elements.

The present invention discloses a platinum-carbon catalyst, a preparation method thereof and an application thereof. The present invention also relates to a hydrogen fuel cell using the platinum-carbon catalyst. The platinum-carbon catalyst contains a carbonaceous carrier and metal platinum particles supported on the carbonaceous carrier. At least 80% of the metal platinum particles have a particle size in the range of 3-5 nm, and the initial voltage of the platinum-carbon catalyst for catalyzing CO electro-oxidation is lower than 0.8 V. According to the platinum-carbon catalyst of the present invention, the metal platinum particles have good dispersion on the carrier, the catalyst has highly uniform cluster platinum particles, and there is a strong interaction between the platinum particles and the carrier, thereby improving the activity and stability of the platinum-carbon catalyst.

The invention provides a platinum metal complex as well as a preparation method and application thereof in an organic electroluminescent device, the metal complex has a structure shown in a general formula I. An adamantane structural unit is introduced to the Pt metal complex to form a Pt ligand, so that the effects of preventing close packing and exciton dispersion among molecules are achieved; therefore, aggregation quenching of triplet excitons is reduced, and the efficiency and the service life of the organic electroluminescent device are improved.

The invention discloses a zinc-doped sub-nano platinum-based catalyst as well as a preparation method and application thereof, and belongs to the technical field of proton exchange membrane fuel cells. The preparation method comprises the following steps: adding a platinum precursor, a transition metal element precursor, a zinc precursor, a small-molecule reducing agent and a catalyst carrier into a container filled with a mixed solvent of benzyl alcohol and ethylene glycol; carrying out uniform ultrasonic treatment on the mixture in an ultrasonic instrument, and then carrying out heating reaction; washing and centrifuging, treating with an acid solution, washing and centrifuging again, and finally drying to obtain the catalyst. The catalyst is uniform in size and uniform in dispersion; the process is simple and efficient; various platinum-based catalysts can be synthesized by changing the molar ratio of platinum to transition metal and the doping amount of zinc; the catalyst shows excellent catalytic performance on a rotating disc electrode and a fuel cell membrane electrode. Zinc elements are doped into platinum metal gaps, the size of nano-particles is reduced through lattice expansion, the Pt electronic structure is optimized, and adsorption of intermediates in the ORR process is weakened.