416 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 invention discloses a method and a device for preparing CLT acid through pipeline type continuous catalytic hydrogenation reduction. According to the method, catalytic hydrogenation reduction reaction is carried out in the device. According to the method, equipment such as a five-stage static tubular mixer, a gas-liquid separation tank and a reduction liquid temporary storage tank is adopted, so that efficient hydrogenation reduction of the CLT acid nitride is realized. In the reaction process, hydrogen is proportionally introduced by stages through a grading mixer, the hydrogen pressure is controlled to be 0.8-1.0 MPa, and the reaction temperature is controlled to be 70-80 DEG C. The used platinum-carbon catalyst is not recycled and recycled after being filtered and recycled, so that the loss of precious metal platinum is effectively reduced. Through the method, the reduction efficiency of CLT acid is remarkably improved, the generation amount of byproducts and dechlorination products is low, and the nitro conversion rate reaches 99.90% or above. The method has the advantages of small equipment volume, short reaction time, high reaction stability and selectivity, and low catalyst cost.

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 belongs to the technical field of chemical catalysts, and particularly discloses a low-temperature ethylene oxidation catalyst for enhancing oxygen vacancies and a preparation method and application thereof, and the preparation method comprises the following steps: S1, adding platinum particles into a solvent according to a certain proportion, dispersing and dissolving to obtain a platinum metal precursor solution; s2, dipping a titanium dioxide carrier into the platinum metal precursor solution obtained in S1 according to a certain proportion, uniformly stirring, and then drying and roasting to obtain a platinum-loaded titanium dioxide carrier; and S3, generating oxygen vacancies on the surface of the titanium dioxide carrier obtained in S2 through an oxygen vacancy pretreatment method to obtain the Pt / TiO catalyst. According to the low-temperature ethylene oxidation catalyst for enhancing the oxygen vacancy as well as the preparation method and the application, a Pt / TiO catalyst for efficiently and stably oxidizing ethylene is realized by introducing an oxygen vacancy mechanism, and the problems of insufficient activity, high humidity sensitivity and poor long-term stability of the existing low-temperature ethylene oxidation catalyst are solved.

Disclosed is a method for preparing one-dimensional platinum diselenide nanobelts, which can simultaneously achieve large-scale, high-quality preparation and self-oriented preparation. The method comprises: (1) preparing a one-dimensional platinum diselenide nanobelt on a SiO 2 (1) spin-coating polymethyl methacrylate (PMMA) on a Si substrate and using electron beam exposure to produce a nanobelt pattern; (2) using a developer to dissolve the PMMA in the exposed part and removing the residual developer with a fixer; (3) using electron beam evaporation to deposit a layer of metal platinum on the substrate, using anhydrous acetone to dissolve the PMMA, and stripping off the metal platinum in the non-nanobelt area to obtain a metal platinum nanobelt; (4) placing the metal platinum nanobelt in the middle position of a tubular furnace, placing a selenium source at an upstream position, and heating the selenium source to 220-300°C; (5) sealing the cavity of the tubular furnace and evacuating it, using nitrogen with a flow rate of 40-70sccm as the carrier gas, heating the cavity to 420-500°C for one hour, and then naturally cooling to room temperature to obtain a platinum diselenide nanobelt.

The invention provides platinum-rhodium alloy powder for a nitrogen-oxygen sensor electrode, a preparation method of the platinum-rhodium alloy powder and slurry for the nitrogen-oxygen sensor electrode, and the preparation method of the platinum-rhodium alloy powder for the nitrogen-oxygen sensor electrode comprises the following steps: performing chemical co-reduction on a platinum metal precursor and a rhodium metal precursor to obtain composite powder, the particle size range of the composite powder is 50-100 nm; and carrying out molten salt heat treatment on the composite powder to obtain the submicron platinum-rhodium alloy powder for the nitrogen-oxygen sensor electrode. According to the platinum-rhodium alloy powder prepared through the method, the three-phase interface uniformity of a metal catalytic functional phase and a zirconium oxide ion electrolyte substrate in electrode slurry is improved, the catalytic capacity of an electrode is improved, meanwhile, the particle size of platinum-rhodium alloy particles is properly increased, and therefore the prepared electrode slurry has better flowability, and the service life of the electrode slurry is prolonged. The problem of easy wire breakage in the subsequent sintering process is reduced, and the yield and aging life of the sensor are improved.

The invention provides an alloying modification method of a platinum catalyst, and relates to the field of electrochemical catalysis, and the alloying modification method specifically comprises the following steps: uniformly mixing a 5% platinum-carbon catalyst and a phytic acid solution, carrying out freeze-drying treatment, carrying out primary pyrolysis, sulfuric acid treatment, ultrapure water cleaning and suction filtration, and drying to obtain powder, adding ferrous sulfate and 1, 10-phenanthroline, and uniformly stirring to obtain the platinum-carbon alloy. And carrying out secondary pyrolysis, sulfuric acid treatment, ultrapure water cleaning, suction filtration and drying to obtain the alloying modified carbon-based catalyst. According to the method, the metal platinum and the transition metal are alloyed, so that the activity and the stability of the catalyst are effectively improved, the usage amount of the noble metal platinum is reduced, and the manufacturing cost of the catalyst is effectively reduced; the alloying modified carbon-based catalyst obtained by the method can be used for preparing primary zinc-air batteries, rechargeable zinc-air batteries and other batteries.

Aspects of the present disclosure generally relate to processes for forming carbon-supported platinum nanocrystals. In an aspect is provided a process for forming a carbon-supported platinum catalyst that includes forming a mixture comprising a platinum metal source, a carbon source, an acid, and a solvent. The process further includes heating the mixture at a temperature that is from about 80° C. to about 250° C. to form a carbon-supported platinum nanocatalyst, the carbon-supported platinum nanocatalyst comprising platinum nanoparticles chemically bonded to a carbon support.

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 invention discloses a platinum chemical plating solution and a preparation method and application thereof in semiconductors, the platinum chemical plating solution comprises the following raw materials: 0.5-10.0 g / L of platinum salt PEP, 2.1-10.0 g / L of ethylenediamine sulfate, 1.2-8.9 g / L of malonic acid, 5-50 g / L of ammonium acetate, 1.2-9.2 g / L of thiourea dioxide, and the balance of ultrapure water and ammonia water; and the pH value of the solution is adjusted to 7.0 by ammonia water. The platinum chemical plating solution disclosed by the invention is suitable for nano precision manufacturing and processing on the surface of an electronic element product of a semiconductor device, and a formed platinum metal film has excellent uniform distribution, compactness and high wear resistance; a semiconductor electronic component product with excellent plugging performance, corrosion resistance, high-precision conductivity and high-quality electronic signal transmission performance is obtained.

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 method for enriching and recovering platinum group metal in a waste catalyst by using carbonylation alloy, which comprises the following steps: uniformly mixing nickel-copper-containing carbonylation alloy as a trapping agent with a waste catalyst (automobile exhaust ternary, medical catalyst and the like), a slag former, a fluxing agent and a reducing agent according to a ratio, and melting at high temperature; nickel-copper-based alloy rich in precious metal can be obtained after slag sulfonium separation, and then the purposes of separation of precious metal and base metal and re-enrichment of the precious metal are achieved through acid dissolution. A traditional iron matte trapping and lead matte trapping method is abandoned, a slag matte trapping method is adopted, the slag type is stable, the content of precious metal in slag is low, the enrichment and recovery rate of the precious metal is high, precious metal alloy enrichment is easy to treat, and the cost is low; the method is free of heavy metal pollution, wide in application field and suitable for industrial production.

The invention belongs to the field of organic electroluminescence, and particularly relates to a fused-ring carbazole tetradentate metal platinum (II) complex, an electronic device and application of the fused-ring carbazole tetradentate metal platinum (II) complex. According to the invention, interaction among molecules is reduced through introduction of diphenyl, and a ring-fused carbazole system is introduced to different positions of carbazole, so that the component proportion of a localized state (LE) in an excited triplet state of the cyclotetradentate platinum (II) complex is increased, the cyclotetradentate platinum (II) complex has low acromion, and the molecular luminescence color purity of the material is improved. The material provided by the invention has good chemical stability and thermal stability, and is easy to prepare an evaporation type OLED device. After being combined with a fluorescent doping material, the material can balance hole and electron transmission, so that energy transmission between a subject and an object is more efficient. The current efficiency and the service life of the organic electroluminescent device manufactured by using the compound as a luminescent layer are obviously improved, and the lighting voltage is obviously reduced. Especially, the photochromic purity of the device can be improved by jointly applying the compound and a phosphorescent sensitized boron-containing compound.

The invention belongs to the technical field of chemical catalysts, and particularly discloses a high-humidity-tolerance Pt / SSZ-13 molecular sieve catalyst and a preparation method and application thereof.The preparation method comprises the following steps that S1, a platinum metal precursor solution is prepared, specifically, platinum particles are added into a solvent according to a certain proportion, and the platinum metal precursor solution is obtained through dispersion and dissolution; s2, dipping and loading: dipping an SSZ-13 molecular sieve carrier into the platinum metal precursor solution obtained in S1 by adopting a dipping method, and uniformly stirring; s3, drying: drying at the temperature of 60-120 DEG C for 3-12 hours; s4, roasting: roasting for 1-10 hours at the temperature of 600-800 DEG C in an air atmosphere; and S5, reduction: reducing at 100-300 DEG C in a hydrogen atmosphere for 1-3 hours to obtain the Pt / SSZ-13 molecular sieve catalyst. According to the high-humidity-tolerance Pt / SSZ-13 molecular sieve catalyst as well as the preparation method and the application thereof, the Pt / SSZ-13 catalyst is obtained by utilizing a small-hole molecular sieve carrier and optimizing Pt loading and a preparation process, the high-humidity-tolerance and stability are realized, and the problem that an existing catalyst is insufficient in activity under the conditions of room temperature and high humidity is solved.

The invention discloses a bimetallic / molecular sieve composite catalyst and a preparation method thereof. The bimetallic / molecular sieve composite catalyst is characterized in that the loading content of a first metal platinum accounts for 1 wt% of the solid content of a molecular sieve, and the loading content of a second metal accounts for 0-1 wt% of the solid content of the molecular sieve. The preparation method of the bimetallic / molecular sieve composite catalyst comprises the following steps: firstly, co-dipping chloroplatinic acid, metal salt and a molecular sieve, and then drying and calcining a co-dipping solution to obtain the bimetallic / molecular sieve composite catalyst, wherein platinum is used as a first metal, the loading content of platinum is fixed to be 1 wt% of the solid content of the molecular sieve, the metal in the metal salt is used as a second metal, the loading content of the second metal is adjusted, and the bimetallic / molecular sieve composite catalyst with different loading contents of the second metal is obtained. According to the invention, the catalytic performance, the utilization rate and the water-resistant stability of Pt in catalytic oxidation of toluene are improved.

The invention provides a core-shell type catalyst carrier which comprises a spherical support body and an active component loading layer wrapping the outer surface of the spherical support body, the surface roughness Ra value of the catalyst carrier is 900 nm to 1900 nm, and / or the surface roughness Rz value of the catalyst carrier is 5000 nm to 10000 nm. The invention also provides a preparation method and application of the core-shell type catalyst. In the core-shell type catalyst, the active component loading layer on the outer surface is not easy to peel off from the support body, and the catalyst prepared by using the carrier has the advantages that the loading layer containing the platinum metal is not easy to wear and peel off, so that the loss of the platinum metal active component is reduced.

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 present invention relates to the field of organic electroluminescence, and in particular to a fused-ring carbazole tetradentate metal platinum (II) complex and a use thereof, and an electronic device. According to the present invention, the interaction between molecules is reduced by means of the introduction of diphenyl, and a fused-ring carbazole system is introduced at different positions of carbazole to improve the component proportion of a localized state (LE) in an excited triplet state of a cyclic tetradentate platinum (II) complex, so that the cyclic tetradentate platinum (II) complex has a low shoulder peak to improve the purity of luminescence of material molecules. Materials involved in the present invention all have good chemical stability and thermal stability, and are easy to prepare evaporated OLED devices. The combination with a fluorescent doping material can balance transport of holes and electrons, and energy transfer between a subject and an object is more efficient. An organic electroluminescent device manufactured by using the compound of the present invention as a luminous layer has markedly improved current efficiency, markedly prolonged service life, and a markedly reduced turn-on voltage. In particular, the joint use with phosphorescent-sensitized boron-containing compounds can improve the purity of luminescence of devices.

The invention belongs to the technical field of deoxidation and hydrogenation catalysis, and provides a low-tungsten-loaded platinum-tungsten bimetallic catalyst prepared based on a solid-phase grinding method and a preparation method and application of the low-tungsten-loaded platinum-tungsten bimetallic catalyst. The preparation method of the catalyst comprises the following steps: loading metal platinum on a silicon dioxide carrier by adopting an impregnation method, and drying to obtain a catalyst precursor; mixing and grinding the catalyst precursor and solid tungsten salt to obtain mixed powder, and drying to obtain catalyst raw powder; and finally, roasting the catalyst raw powder at high temperature in an air atmosphere to prepare the required platinum-tungsten bimetallic catalyst. And in the prepared catalyst, the mass ratio of the active metal platinum is 1.0%-5.0%, and the mass ratio of the metal tungsten is 0.4%-4.0%. When the platinum-tungsten bimetallic catalyst prepared by the method is used in a reaction for preparing 1, 3-propylene glycol through glycerol hydrogenolysis, the yield of 1, 3-propylene glycol is ensured while the tungsten loading capacity is remarkably reduced; and the preparation process is simple, convenient to operate and beneficial to industrial production.

Discloses a hydrometallurgical process and system for the recovery of precious metals; specifically palladium, rhodium, and platinum metals, at high purity and with limited waste and environmental fouling.

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 invention relates to the technical field of semiconductor integrated circuit metal detection, in particular to a wafer surface platinum metal ion recovery method. The wafer surface platinum metal ion recovery method comprises the following steps: titrating a first volume of hydrofluoric acid solution to the center of a wafer to be detected; titrating a second volume of a mixed acid solution to the center of the wafer to be detected, so that the mixed acid solution and the hydrofluoric acid solution are mixed to form a platinum metal recovery solution; the mixed acid solution comprises concentrated hydrochloric acid and concentrated nitric acid; enabling the platinum metal recovery liquid to scan the surface of the to-be-detected wafer, and dissolving platinum metal ions in the surface of the to-be-detected wafer; and diluting and recovering the platinum metal recovery liquid. According to the wafer surface platinum metal ion recovery method, the problems that the concentration of aqua regia in recovered platinum metal ions is gradually increased and aqua regia with relatively high concentration and volume is easy to cause alarm of a detection device due to multiple aqua regia recovery operations in related technologies can be solved.

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 invention relates to the field of catalysts, in particular to a catalyst, a preparation method and application thereof and a cyclohexane compound dehydrogenation method. The catalyst comprises a carrier, metal Pt and alkaline metal, the particle size of the metal Pt in the catalyst is 1.2-2.5 nm, and the total acid content of the catalyst is 150-350 [mu] mol NH3 / g. The particle size of the metal platinum in the catalyst is 1.2-2.5 nanometers, and the total acid content of the catalyst is 150-350 [mu] mol NH3 / g, so that the catalyst has excellent stability and catalytic hydrogenation activity.

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 invention discloses a ZSM-48 molecular sieve with low relative crystallinity, a preparation method and application thereof, and a method for improving the performance of the ZSM-48 molecular sieve by adjusting hydrothermal synthesis time. In the synthesis stage of the ZSM-48 molecular sieve, under the condition that the composition of the synthesis liquid is not changed, the hydrothermal synthesis time is shortened, the acid sites of the molecular sieve are moderately reduced, the distribution of the acid sites of the molecular sieve is changed, and the incompletely crystallized molecular sieve is prepared. Furthermore, the ZSM-48 molecular sieve with low relative crystallinity is used as a carrier, the ZSM-48 molecular sieve loaded with noble metal platinum is used for a hydroisomerization reaction of long-chain n-alkanes, due to a proper amount of acid sites and proper distribution of the acid sites, an isoparaffin product can be prepared with high selectivity, generation of cracking products is inhibited, and the yield of the isoparaffin product is improved. And the proportion of a single-branched chain product is obviously improved.

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 invention belongs to the technical field of organic luminescent materials and semiconductors, and provides a spirofluorene metal platinum complex containing N heteroatoms and an electroluminescent device thereof, and the spirofluorene metal platinum complex containing N heteroatoms has a structure as shown in a formula (1): # imgabs0 #. According to the electroluminescent device, the spirofluorene metal platinum complex containing N heteroatoms is used as a guest luminescent material in a luminescent layer, so that blue light can be emitted, the luminous efficiency is improved, and the service life is prolonged.

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.