33 results about "Platinum Metal" patented technology

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.

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.

The present invention provides a metal platinum (II) and palladium (II) complex, an organic light-emitting device and a display or lighting apparatus, wherein a structure of the metal platinum (II) and palladium (II) complex is as shown in the following formula (I). A cyclometalated platinum (II) and palladium (II) complex based on a tetradentate ligand according to the present invention contains molecules having relatively strong rigidity, can effectively inhibit non-radiative transition generated by molecular vibration, and has relatively high quantum efficiency and luminous intensity. Meanwhile, a tetradentate phosphorescent metal complex of the present invention is a novel parent nucleus structure, which may be developed into a series of efficient phosphorescent metal platinum complexes. The present invention has excellent application prospects in the fields of OLED display and lighting and the like, especially in the field of light-emitting layer materials.

The present invention relates to a catalyst. The catalyst comprises a nitrogen-doped carbon-based carrier loaded with platinum metal particles existing in the form of a zero-valent element, wherein the doping nitrogen comprises more than 40% to 80% of nitrogen atoms simultaneously connected to three carbon atoms via chemical bonds, and 0% to 1% of nitrogen atoms connected to oxygen atoms via chemical bonds; and on the basis of the total weight of the catalyst, the catalyst comprises 0.1 wt.% to 2 wt.% of the doping nitrogen, and 0.1 wt.% to 1.5 wt.% of the platinum metal particles. The present invention further relates to a preparation method for the catalyst and the use of the catalyst in a dehydrogenation reaction. The catalyst of the present invention has a good dehydrogenation activity and a low hydrogenolysis activity.

This invention relates to the field of fine chemical technology, and discloses an alloy catalyst, its preparation method, and its application. The preparation method of the alloy catalyst of this invention includes: S1, dispersing a copper source, a platinum source, and an anchoring agent in a solvent, and then adding a reducing agent; S2, dispersing the pretreated support in the solution obtained in step S1 for loading; S3, drying the loaded support obtained in step S2 to obtain the alloy catalyst; the anchoring agent is used to anchor copper and platinum onto the support. The alloy catalyst of this invention uses a copper source, a platinum source, and an anchoring agent as raw materials. The anchoring agent loads copper and platinum metal particles onto the support, effectively preventing the detachment and loss of copper and platinum metals. The alloy catalyst is used to catalyze the synthesis of the antioxidant 6PPD, effectively inhibiting the ketone-to-alcohol side reaction and improving catalytic efficiency.

The present invention belongs to the technical field of the preparation of organic electroluminescent materials, and specifically relates to a tetradentate cyclometalated platinum (II) complex based on a 4-carbazolyl carbene structure, an electronic device and apparatus, and the use thereof. In the present invention, the steric hindrance of material molecules can be increased by introducing a 4-carbazolyl group having large steric hindrance at a carbene site, such that molecular aggregation can be avoided, and intermolecular interaction and luminescence quenching can be inhibited, which are beneficial for improving the luminescence efficiency and the color purity. The present invention has significant application prospects in the fields of OLED display and illumination.

This invention belongs to the field of organic electroluminescent material preparation technology, specifically relating to an organic light-emitting diode material, device, and apparatus of a fluorene-carbazole tetradentate platinum(II) complex. This invention obtains a tetradentate platinum(II) complex phosphorescent material by introducing a fluorene ring system at the 5,6-position of carbazole. This enhances the localization of the excited triplet state (…) of the tetradentate platinum(II) complex. 3 The proportion of LE (electroluminescent) components in the material results in a low shoulder peak, improving the purity of the luminescent color and enhancing its stability. The materials provided in this invention exhibit excellent chemical and thermal stability, facilitating the fabrication of vapor-deposited OLED devices. Organic electroluminescent devices fabricated using the complexes of this invention as the luminescent layer show significant improvements in current efficiency and lifetime, while also reducing the turn-on voltage.

The application aims to provide a method for preparing 1,2-pentanediol by hydrogenolysis of furfuryl alcohol, which selectively produces 1,2-pentanediol by hydrogenation of furfuryl alcohol under the action of ceria-supported bimetallic catalyst; the carrier of the ceria-supported bimetallic catalyst is ceria cubic block, the active metals are platinum and copper, and the mass fraction of the active metal platinum in the carrier is 0.01%-1.0%. The method can be used in batch kettle, fixed bed and other reactors, realizes high selectivity of furfuryl alcohol in the hydrogenolysis of 1,2-pentanediol, and effectively solves the problems of high preparation cost of noble metal catalyst, high reaction pressure of copper-based catalyst, and high requirements for equipment and operation in the process of preparing 1,2-pentanediol by hydrogenolysis of furfuryl alcohol.

This invention discloses a method for preparing a carbon-supported platinum catalyst for fuel cells and the platinum catalyst itself. The method includes: dissolving a water-soluble platinum precursor and a weakly reducing complexing agent in a solvent; allowing the mixture to stand at room temperature under static conditions of continuous inert gas circulation and no mechanical stirring to form a homogeneous platinum precursor; adding a reducing agent and allowing it to stand at room temperature for reduction to obtain a platinum metal colloid; then adding a carbon support slurry and stirring for loading; finally, obtaining the carbon-supported platinum catalyst through solid-liquid separation, washing, and drying. This invention eliminates the autocatalytic oxidation of platinum nuclei and local concentration gradients through the synergistic effect of inert gas protection and static conditions, achieving homogeneous nucleation and uniform growth of platinum particles at room temperature. Simultaneously, the "form platinum particles first, then load" process route ensures that the platinum particles are not interfered with by the carbon support during formation, effectively solving the technical problems existing in the prior art.

The application discloses a preparation method of a high electrochemical activity nanodiamond / graphite composite film electrode. First, a nanodiamond / graphite composite film electrode is prepared through hot wire chemical vapor deposition, then, atomic layer deposition equipment is used to deposit platinum metal atoms on the surface of the composite film electrode, then, the composite film electrode is placed in an H2SO4 solution and connected to an electrochemical workstation to perform cyclic voltammetry treatment, and finally, the target electrode is obtained. The method can significantly improve the electrochemical activity area of the nanodiamond / graphite composite film electrode, provides a new idea and scheme for the design and preparation of a novel nanodiamond-based composite film electrode, and has great application prospects in the fields of electrocatalysis and electric energy storage.

This invention provides a catalyst composition and a method for removing nitrogen oxides. The catalyst composition includes a carrier, a first active ingredient, and a second active ingredient. The first active ingredient is coated on the surface of the carrier, wherein the first active ingredient includes a first catalyst, which is manganese oxide. The second active ingredient includes a second catalyst and a third catalyst, and is coated on the surface of the first active ingredient and the surface of the carrier where the first active ingredient is not coated. The second catalyst contains platinum metal, palladium metal, or a combination thereof, and the third catalyst contains potassium oxide, sodium oxide, or a combination thereof. The molar ratio of the first catalyst to the second catalyst is from 1:0.001 to 1:0.2, and the molar ratio of the first catalyst to the third catalyst is from 1:0.1 to 1:10.

The application provides a rare earth metal platinum-based catalyst and a preparation method and application thereof, and belongs to the technical field of catalyst materials.The catalyst is prepared by using pretreated coconut shell activated carbon as a carrier, platinum as an active component and rare earth metal chloride as an additive through an impregnation method; in the catalyst, Pt is highly dispersed on the surface of the carrier and in the pores in the form of metal elementary substance nanoparticles with an average particle size of 1-3 nm; and the rare earth metal effectively inhibits the sintering and carbon deposition of Pt particles through electronic regulation and geometric isolation, thereby significantly improving the catalytic activity and long-term operation stability of the catalyst in the ethyne hydrochlorination reaction.The preparation method of the catalyst is simple in process and good in repeatability, and the prepared catalyst exhibits excellent catalytic performance at a low Pt loading, and has industrial application potential.

The application discloses a kind of anti-sulfur water Pt-based bimetallic CO oxidation catalyst and preparation method thereof, belong to environmental catalytic material technical field.The catalyst prepared by the application uses titanium dioxide as carrier, and adopts impregnation method to load noble metal platinum and adjuvant molybdenum to form bimetallic active component.The catalyst utilizes the regulation effect of Mo species to Pt electronic structure and the competitive adsorption mechanism of sulfur species, effectively solves the problem that traditional single platinum-based catalyst is easily poisoned and inactivated under sulfur-containing and water-containing conditions.Experiments show that the catalyst can still maintain very high CO conversion rate for a long time under harsh working conditions containing high concentration of sulfur dioxide and water vapor, and has excellent anti-sulfur regeneration performance.The catalyst preparation process is simple, and the stability is good, which is suitable for efficient elimination of carbon monoxide in industrial waste gas and motor vehicle exhaust.

This application relates to a semiconductor device and a method for manufacturing the same, comprising: providing a substrate; forming a sacrificial layer on the substrate covering non-silicide regions and exposing silicide regions; forming a metal material layer on the substrate within the silicide regions, the metal material layer extending and covering the sacrificial layer, and the metal element of the metal material layer including at least platinum metal; subjecting the metal material layer to rapid thermal processing to form a metal silicide layer; performing a first wet etching process using an SPM solution to remove at least a portion of the metal material layer covering the sacrificial layer; performing a second wet etching process using a phosphoric acid solution to remove a portion of the sacrificial layer, thereby increasing the contact area between the sacrificial layer and the remaining metal material layer; and performing a third wet etching process using a mixed solution of an APM solution and an anionic surfactant to remove the remaining metal material layer. This application improves the efficiency and effectiveness of wet etching processes in removing metal material layers and reduces the risk of residual metal material layers within the semiconductor device.

The present invention relates to the technical field of organic electroluminescence preparation, and specifically to a tetradentate cyclometalated platinum(II) complex based on 1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthalene or a derivative structure thereof, and a use thereof. By means of the introduction of 1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthalene and the derivative structure thereof to increase steric hindrance, the present invention can avoid red shift or luminescence quenching caused by molecular aggregation. Deuteration at the periphery of a cyclometalated ligand can improve the stability of a material, enabling a phosphorescent material of the present invention to exhibit good chemical and thermal stability, and facilitating the fabrication of an evaporated OLED device. An organic electroluminescent device fabricated by using the complex of the present invention as a light-emitting layer material shows significant improvement in both current efficiency and service life, and has great application prospects in the fields of OLED display and illumination.

This invention belongs to the field of organic electroluminescent material preparation technology, specifically relating to a tetradentate cyclic platinum(II) complex based on a phenyl 3,5-position substituted aromatic amine donor structure, electronic devices, apparatuses, and their applications. This invention increases steric hindrance by introducing aromatic amine substituents at the 3,5 positions of 1,1' biphenyl, thus avoiding redshift or luminescence quenching caused by molecular aggregation. The phenyl 3,5-position substituted aromatic amine serves as a hole-type host material, connecting the host and guest materials through chemical bonds, resulting in uniform molecular dispersion and preventing aggregation-induced concentration quenching and efficiency reduction. Organic electroluminescent devices fabricated using the compound of this invention as the luminescent layer show significant improvements in quantum efficiency and color purity, demonstrating great application potential in OLED displays and lighting.

A catalytic composition, including a carrier, a first active component, and a second active component. The first active component is covered on a surface of the carrier. The first active component includes a first catalyst, and the first catalyst is a manganese oxide. The second active component includes a second catalyst and a third catalyst, and is covered on a surface of the first active component and the surface of the carrier that is uncovered with the first active component. The second catalyst includes a platinum metal, a palladium metal, or a combination thereof. The third catalyst includes a potassium oxide, a sodium oxide, or a combination thereof. A molar ratio of the first catalyst to the second catalyst is from 1:0.001 to 1:0.2, and a molar ratio of the first catalyst to the third catalyst is from 1:0.1 to 1:10.

The application belongs to the technical field of organic electroluminescent material preparation, and particularly relates to a tetradentate ring metal platinum (II) complex based on a 4-carbazolyl carbene structure, an electronic device, a device and application thereof. The application can increase the steric hindrance of a material molecule by introducing a large steric hindrance 4-carbazolyl at a carbene site, can avoid molecular aggregation, inhibit the interaction between molecules and luminescence quenching, thereby facilitating the improvement of luminescent efficiency and color purity, and has great application prospect in the field of OLED display and lighting.

The present invention relates to the technical field of preparation of organic electroluminescent materials, and particularly, to a fluorenocarbazole tetradentate platinum(II) complex-based organic light-emitting diode material, device, and apparatus. In the present invention, a tetradentate platinum(II) complex-based phosphorescent material is obtained by introducing a fluorene ring system at the 5,6-position of carbazole, so as to increase the proportion of components of the localized state (3LE) 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 materials provided by the present invention all have good chemical stability and thermal stability, thereby facilitating the preparation of evaporation-type OLED devices. The organic electroluminescent device manufactured by using the complex of the present invention as a light-emitting layer has a significant improvement in both the current efficiency and service life, and can also reduce the turn-on voltage.

The application discloses a porous carbon loaded platinum metal nanomaterial and a preparation method and application thereof, and relates to the technical field of new energy materials.The method comprises the following steps: high-temperature annealing porous carbon is immersed in a mixed solution of a platinum salt and a transition metal salt, metal ions are adsorbed in carbon pores through ultrasonic treatment, and a metal salt / porous carbon composite is obtained by evaporating the solvent; carbon thermal reduction is carried out in a temperature range in which platinum and the transition metal are immiscible, platinum ions are reduced to zero-valence platinum atoms and nucleate and grow, transition metal ions are reduced to oxides, and carbon monoxide produced by reduction is constrained and guided to grow into two-dimensional sheet oxides in anisotropy; sheet interfaces inhibit the isotropic growth of Pt, so that Pt forms two-dimensional sheet nanomaterials; and the oxides are removed through acid washing, so that the porous carbon loaded Pt nanomaterial is obtained.The catalytic material is used as a cathode oxygen reduction catalyst of a proton exchange membrane fuel cell, and has super-high electrochemical area and catalytic activity and excellent durability under acidic conditions.

The application discloses a method for separating platinum metal from waste platinum catalyst, and relates to the technical field of resource utilization, and comprises the following steps: crushing and calcining the waste platinum catalyst to obtain waste platinum powder; adding the waste platinum powder into a mixed leaching agent according to a preset solid-liquid ratio, adjusting the leaching temperature in an ultrasonic-pulse electric field environment, filtering, and obtaining a leaching liquid, wherein the mixed leaching agent comprises hydrochloric acid, sodium sulfite and citric acid; adding a modified MOF material into the leaching liquid, adjusting the pH value, adsorbing platinum ions, filtering, and obtaining filter residue; adding the filter residue into a desorption liquid for resolution, suction filtering, adding hydrazine hydrate into the filtrate for reduction, solid-liquid separation, and obtaining sponge platinum, wherein the desorption liquid comprises thiourea and hydrochloric acid; washing the sponge platinum with dilute nitric acid, vacuum drying, and obtaining platinum powder; and the method can solve the technical problems of large equipment loss, high wastewater treatment cost or the inability to realize carrier recycling in the prior art by adopting a strong acid reagent or an alkali fusion method.

The application discloses a kind of polybenzodifuranone and its constant potential polymerization preparation method, belong to organic conductive polymer material preparation technical field, benzodifuranone (BFDO) and supporting electrolyte are dissolved in polar aprotic solvent, and electrolyte is obtained by mixing uniformly;With platinum metal electrode as working electrode and counter electrode, with saturated calomel electrode as reference electrode, three electrodes are connected with direct current power supply and are placed in the electrolyte, in air atmosphere, electrochemical polymerization reaction is carried out using constant potential method;After reaction, the reaction liquid is extracted and filtered, dried, to obtain polybenzodifuranone (PBFDO).The application uses constant potential electrochemical polymerization method, n-type conductive polymer polybenzodifuranone can be synthesized in air atmosphere in one step, without catalyst, high-temperature anaerobic environment and complex post-processing, the product conductivity is 1.157-18.28 S / cm.Process simplification, low cost, process controllable, can realize green scale preparation and industrialization application.

This invention discloses a methanol fuel cell catalyst and its preparation method. The catalyst's structural unit uses nitrogen-doped iron-based carbon nanotubes loaded with iron and cobalt single atoms as a conductive network, with platinum uniformly loaded onto this network. The preparation method includes the following steps: S1, preparing nitrogen-doped iron-based carbon nanotubes; S2, loading iron-cobalt hydroxide nanosheets via hydrothermal reaction to obtain iron-cobalt hydroxide@nitrogen-doped iron-based carbon nanotubes; S3, reducing the iron-cobalt hydroxide@nitrogen-doped iron-based carbon nanotubes in a reducing atmosphere using CVD to obtain iron-cobalt single atoms@nitrogen-doped iron-based carbon nanotubes; S4, loading platinum onto the iron-cobalt single atoms@nitrogen-doped iron-based carbon nanotubes under an inert atmosphere using magnetron sputtering to obtain platinum@iron-cobalt single atoms@nitrogen-doped iron-based carbon nanotubes, which serve as the methanol fuel cell catalyst, exhibiting high specific surface area, numerous active sites, excellent performance, low cost, and long-term stability.

The application belongs to the technical field of organic electroluminescence preparation, and particularly relates to a tetradentate ring metal platinum (II) complex based on 1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthalene and derivatives thereof and application thereof. By introducing 1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthalene and derivatives thereof to increase steric hindrance, red shift or luminescence quenching caused by molecular aggregation can be avoided; deuterium substitution on the periphery of the cyclometallated ligand can improve the stability of the material, so that the phosphorescent material in the application has good chemical stability and thermal stability, and is easy to prepare an evaporation type OLED device. The organic electroluminescent device prepared by using the complex as a luminescent layer material has obvious improvement in current efficiency and service life, and has great application prospect in the field of OLED display and lighting.

This application provides a tetradentate cyclic platinum(II) complex, which is a tetradentate cyclic platinum(II) complex containing phenothiazine or its oxide. The tetradentate cyclic platinum(II) complex containing phenothiazine is shown in Formula I, and the tetradentate cyclic platinum(II) complex containing phenothiazine oxide is shown in Formula II. When used as a dye material for the light-emitting layer, the tetradentate cyclic platinum(II) complex containing phenothiazine or its oxide provided in this application can effectively reduce the driving voltage of organic electroluminescent devices (OLEDs), improve the luminous efficiency of OLEDs, and extend the lifespan of OLEDs, giving them excellent performance and broad application prospects in OLED displays and lighting. This application also provides an organic electroluminescent device comprising a tetradentate cyclic platinum(II) complex containing phenothiazine or its oxide.

A method of recovering or producing precious metals, platinum group metals, and / or rare earth elements from a starting substrate, the method comprising: contacting the starting substrate with a composition comprising an isolated microbe for an amount of time sufficient for the biological transmutation process to occur, the isolated microbe expressing a first enzyme at least 95% identical to, or at least 98% identical to, or identical to a transmutase enzyme identified by SEQ. ID. NO. 1, and a second enzyme at least 95% identical to, at least 98% identical to, or identical to an amplificase enzyme identified by SEQ. ID. NO. 2. Biological transmutation of silicon to gold. Converting phosphorus in a starting material into phosphoric acid and / or phosphonic acid. Converting heavy oil in a starting material into octane. Methods of extracting, amplifying, or producing lithium from various substrates.

This invention discloses an aftertreatment assembly, a vehicle, and a vehicle control method, belonging to the field of vehicle technology. The aftertreatment assembly comprises a pre-stage SCR, an MOC, a DPF, a post-stage mixer, and a post-stage SCR, sequentially connected along the exhaust gas flow direction. That is, the aftertreatment assembly has two stages of SCR, thereby improving its ability to reduce nitrogen oxides and adapting to higher engine exhaust emissions, thus enhancing exhaust gas purification. Simultaneously, the ratio of platinum to palladium in the oxidation catalytic coating of the MOC is greater than 12:1, resulting in stronger oxidation capabilities for CO, NO, and HC in the exhaust gas. This not only provides more NO2 for DPF regeneration, thus improving DPF functionality, but also further enhances exhaust gas purification.

This invention belongs to the field of glycerol oxidation catalyst technology, and discloses a catalyst for the selective oxidation of glycerol to dihydroxyacetone and its preparation method. The catalyst consists of platinum metal nanoparticles and a bismuth oxychloride-zirconia composite support. Bismuth oxychloride is grown in situ on the zirconium oxide surface to form a heterojunction interface. The platinum metal nanoparticles are anchored to the heterojunction interface by simultaneously interacting with both bismuth oxychloride and zirconium oxide, forming a platinum-bismuth oxychloride-zirconia interface anchoring structural unit. This invention utilizes the heterojunction interface formed by BiOCl and ZrO2 to generate electron redistribution at the interface. The Pt nanoparticles anchored at this interface undergo synergistic electronic coupling with the two supports, thereby regulating the electronic structure of Pt and optimizing its adsorption and activation behavior for glycerol molecules, making Pt more conducive to promoting the directional oxidation reaction pathway of secondary hydroxyl groups.

A method of preparing a metal matrix composite powder for additive manufacturing, comprising preparing a cored wire having a metal shell enclosing a ceramic, and using the wire as an electrode in atomisation. The ceramic may be TiB2, SiC or AlN, or MAX phase powder. The MAX phase may have a general formula Mn+1AXn, where M is a metal, A is an A-group element and X is C, N or B. M may be one or more of Ti, Sc, V, Cr, Zr, Nb, Hf, Mn and Mo, and A may be one or more of Cd, Si, Sn, In, Ga, Tl, Al, Ga, Pb, Zn and Au. The MAX phase may be Ti3SiC2, Al4SiC4 or Al8SiC7.The powder may have a d10 of 5 µm or less and a d90 of 10 micrometres or less. The wire may comprise a metal powder or wire within the shell, both of which may be nickel, steel, titanium, aluminium, cobalt, magnesium, copper, refractory metals, platinum group metals or vanadium, or their alloys. The wire may be greater than 70 wt% Al, optionally Al6061 alloy. The volume of powder may be 5, 10 or 50 % of the total volume of the wire. [Figure 2]