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67 results about "Palladium atom" patented technology
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Novel chemical copper plating method
ActiveCN101979709AImprove reliabilityNo acid fogLiquid/solution decomposition chemical coatingPrinted circuit manufactureCopper platingEtching
The invention discloses a novel chemical copper plating method. The method comprises steps of degreasing and hole finishing, washing, micro etching, pre-impregnation, activation, washing, dispergation, washing and chemical copper plating. The method is characterized in that: in the degreasing and hole finishing step, a circuit board can be degreased, and more important, high negative electricity is carried in the hole and can adsorb more palladium colloid so that the backlight of a copper layer reaches over level 9; salt-based ammonium sulfate and palladium sulfate solution is adopted in the activation step, and acid mist produced by the traditional palladium colloid is not produced, so the method is environment-friendly and has no any injury to the operating personnel; and in the dispergation step, sulfuric acid and hydrazine sulfate are used for removing ammonium radicals, and the hydrazine can reduce palladium metal into palladium atoms, so copper is better deposited.
Owner:江苏矽智半导体科技有限公司
Catalytic hydrodechlorination Pd-M/NOMC catalyst and preparing method and application thereof
InactiveCN108283933AOrdered pore arrangementMore active sitesPhysical/chemical process catalystsOrganic chemistrySynthesis methodsNitrogen doped
The invention relates to a catalytic hydrodechlorination Pd-M / NOMC catalyst and a preparing method and application thereof. According to the catalyst, with synthetic-nitrogen-doped mesoporous carbon being a carrier, the active component is Pd-M. A one-step synthesis method is adopted to prepare a nitrogen-doped mesoporous carbon catalyst, an impregnation method can be adopted to synthesize the Pd-M / NOMC catalyst, and hydrogen, formic acid-sodium formate, methyl alcohol and the like are adopted as hydrogen sources for hydrodechlorination of chlorophenol. Nitrogen atoms are doped on a mesoporouscarbon material, the reactive site of catalysis is increased, and the activity of the catalyst is improved. The one-step method for synthesis is adopted, the nitrogen sources can be controlled from the source, the content of added nitrogen is easier to control, and the formed mesoporous structure is not easily damaged; by introducing nitrogen, the lowest binding energy position of palladium is migrated, electrons in nitrogen are migrated to the surface of palladium atoms, which improves the stability between palladium and the material.
Owner:TAIZHOU UNIV
Ternary carbon loaded palladium tin platinum nanoparticle catalyst and preparation method thereof
ActiveCN103022522AReduce loadHigh catalytic efficiencyCell electrodesMetal/metal-oxides/metal-hydroxide catalystsSolventUltrasonic dispersion
The invention discloses a ternary carbon loaded palladium tin platinum nanoparticle catalyst and a preparation method thereof. The preparation method includes: dissolving a palladium-containing metal salt and a tin-containing metal salt in ethylene glycol, with the palladium and the tin being in an atom ratio of 1:1, adding a platinum metal salt, with the platinum atom and the palladium atom or the tin atom being in a ratio of 0.001:1-0.8:1, finally adding nanoscale carbon powder as a carrier of metal nanoparticles, conducting ultrasonic dispersion to obtain a uniform mixed solution, and then adding a sodium borohydride solution into the mixed solution in a dropwise manner, thus obtaining the highly dispersed ternary carbon loaded palladium tin platinum nanoparticle catalyst. In the invention, ethylene glycol is adopted as the solvent due to its high viscosity, so that the metal ion reduction and precipitation process can be more uniform, and palladium tin platinum nanoparticles with better dispersibility can be generated. The ternary palladium tin platinum nanoparticles prepared in the invention have a particle size of 2-5nm, and electrochemical tests show that the nanoparticles present obvious activity in electrocatalytic oxidation of ethanol and formic acid. The method provided in the invention is simple, and is suitable for large-scale preparation of anode catalyst materials for direct ethanol and formic acid fuel cells.
Owner:广东一纳科技有限公司
Preparation method and application of ultra-smallpalladium base alloy material
InactiveCN110404573AImprove effective useInhibit growthOrganic-compounds/hydrides/coordination-complexes catalystsHydrocarbon by hydrogenationPalladium atomAlloy
The invention provides a preparation method of an ultra-small palladium base alloy material. The preparation method comprises the steps that a porous nitrogen-doped carbon carrier, a palladium salt and a metal salt are mixed in a solvent, and a mixture is obtained after removing the solvent; and the mixture is calcined in a reduction atmosphere to obtain an ultra-small palladium base alloy material. According to the preparation method of the ultra-small palladium base alloy material, compared with the prior art, by the fact that the metal-nitrogen coordination bond is formed between metal andthe heteroatomic nitrogen on the carbon carrier and the channel limiting effect of the abundant channel structure in the carrier, growth of particles is inhabited, metal particles can be evenly supported on the surface of the porous nitrogen-doped carbon carrier, not only effective utilization of palladium atoms is increased, but also the cost of a catalyst can be reduced, catalytic research is favorable to be applied, at the same time, the method is simple and universal, and industrial production is easy.
Owner:UNIV OF SCI & TECH OF CHINA
Preparation method of palladium nano crystal
InactiveCN101775638AUniform and regular shapeVarious shapesPolycrystalline material growthFrom normal temperature solutionsPalladium atomSingle crystal
The embodiment of the invention discloses a preparation method of palladium nano crystals, comprising the following steps: adding potassium iodide solution in cetyl trimethylammonium bromide water solution to obtain mixed solution; adding palladouschloride acid solution, palladium nano cubic seed solution and ascorbic acid solution respectively into the mixed solution, and reacting fully; and crystallizing out palladium nano crystals from solution after reaction. cetyl trimethylammonium bromide severs as a surfactant, can stabilize and prevent nano crystals from precipitation, and plays a role in promoting the nano crystals to form uniform and neat shape. Ascorbic acid servers as a reducing agent in the reaction process to reduce bivalent palladium in palladouschloride acid solution into nulvalent palladium atom. Potassium iodide can absorb on the surface of the palladium nano crystals so as to influence the shape of the nano crystals. The preparation method in the invention can synthesize nano crystals in a controllable manner to form palladium nano crystals with various shapes, and is favor of researching the relationship between the shape of the palladium nano crystals and growth conditions thereof.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
A palladium-silver bimetallic composite material and a preparing method thereof
ActiveCN106914238AReduce catalytic activityReduced strengthMetal/metal-oxides/metal-hydroxide catalystsHydrogenPalladium atom
A palladium-silver bimetallic composite material is provided. The composite material includes silver nanometer crystals and a palladium-silver alloy layer on the surface of the silver nanometer crystals. The invention also provides a preparing method of the composite material. The preparing method includes mixing the silver nanometer crystals, a reductant, an etching agent, a surface protectant, a solvent and a palladium source compound, and then reacting the mixture to obtain the composite material. The nanometer crystals having a core shell structure are prepared by a provided synthetic method. Dispersed palladium atoms grow on the surfaces of the silver nanometer crystals, thus effectively weakening strength of palladium-hydrogen bonds and facilitating hydrogen desorption. In addition, low-cost silver nanometer particles are adopted inside the composite material, and palladium active points are distributed on the surfaces of the silver nanometer crystals, and therefore the activity of the composite material as a catalyst is high and the cost is low.
Owner:UNIV OF SCI & TECH OF CHINA
CuPd metal nano catalyst, and preparation and applications thereof
InactiveCN106861717ALower d-band centerModerate adsorption energyMaterial nanotechnologyCell electrodesCopper atomNano catalyst
The invention discloses a CuPd metal nano catalyst of a four-feet structure, and a preparation method of the CuPd metal nano catalyst, and also discloses a CuPd / C metal nano catalyst, a preparation method of the CuPd / C metal nano catalyst, and applications of the CuPd / C metal nano catalyst in fuel battery cathodic oxygen reduction. According to the CuPd / C metal nano catalyst, the surface of carbon black is loaded with the CuPd metal nano catalyst. According to the CuPd metal nano catalyst of a four-feet structure, electrons on copper atoms are transferred onto palladium atoms, and the electrons are gathered on the tips of the four-feet structure, so that electron density of tip palladium atoms is increased further, d band center of palladium atoms is reduced, the strong adsorption between palladium atoms and oxygen is reduced, and catalytic activity is increased.
Owner:INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
Preparation method of palladium diselenide two-dimensional crystalline state film layer
ActiveCN108486531ASolve the current situation that only palladium diselenide block can be obtainedPolycrystalline material growthVacuum evaporation coatingPalladium atomEvaporation
The invention provides a preparation method of a palladium diselenide two-dimensional crystalline state film layer. The preparation method comprises the following steps that 100, a base with silicon carbide as a base body and a graphene layer manufactured on the surface is prepared; 200, the temperature of the base is kept within the growth temperature range of selenium and palladium; and 300, selenium atoms and palladium atoms are generated from pure selenium and pure palladium in an evaporation way according to the reaction ratio and deposited on the base, and the selenium atoms and the palladium atoms are reacted on the base to form the two-dimensional ordered crystalline state film layer composed of the atoms, wherein in the film layer, the selenium atoms and the palladium atoms are distributed in a selenium-palladium-selenium overlaid state. By means of the method, the current situation that only palladium diselenide blocks can be obtained in the prior art is solved, the atomic-scale palladium diselenide film layer can be obtained, and convenience is brought to research on physical properties of palladium diselenide and relevant devices by sufficiently utilizing palladium diselenide.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI
Preparation method for gold nanoring
ActiveCN105478797AEasy to operateLow costTransportation and packagingMetal-working apparatusPalladium atomSolvent
The invention relates to a preparation method for a gold nanoring. The preparation method comprises the following steps: dissolving a palladium nano sheet, ascorbic acid and a dispersing agent into a solvent, wherein in the palladium nano sheet, the concentration of palladium atoms in a solution is 2.0*10<-4>-1.4*10<-3>mol / L, and the concentration of the ascorbic acid in the solution is 0.1-0.5mol / L; and then, injecting a chloroauric acid aqueous solution into the solution, and reacting at a temperature of 0-35 DEG C to obtain the gold nanoring, wherein a molar ratio of the ascorbic acid to the palladium atoms in the palladium nano sheet is 7:1 to 25:1. The preparation method is simple, is high in repeatability and is low in cost; and the prepared gold nanoring has a hollow structure, is uniform in dimension and is good in dispersion, and is adjustable in dimension and wall thickness.
Owner:ZHEJIANG UNIV
High-valent palladium fluoride complexes and uses thereof
The present invention provides novel high-valent palladium fluoride complexes. The complexes typically include multi-dentate ligands that stabilize the octahedral coordination sphere of the palladium(IV) atom. These complexes are useful in fluorinating organic compounds, in particular aryl-containing compounds. The invention is particularly useful for fluorinating compounds with 19F for PET imaging.
Owner:PRESIDENT & FELLOWS OF HARVARD COLLEGE
Monatomic catalyst as well as preparation method and application thereof
InactiveCN111790377ALow costReduce dosageGroup 4/14 element organic compoundsOrganic compound preparationPtru catalystCarbon nitride
The invention relates to the technical field of catalysts, in particular to a monatomic catalyst as well as a preparation method and application thereof. The monatomic catalyst comprises a carrier andan active component loaded on the carrier, the active component is palladium single molecules, and the carrier is graphite-phase carbon nitride. Palladium is loaded on graphite-phase carbon nitride in a single molecule form to form the ultrathin two-dimensional nano-scale catalyst, and the catalyst has the advantages that the use amount of palladium is lower, and the palladium atom utilization rate can reach 100%.
Owner:NORTHEAST GASOLINEEUM UNIV
Preparation and application of carbon-supported amorphous metallic nickel
InactiveCN102614880AImprove stabilityHigh activityCell electrodesMetal/metal-oxides/metal-hydroxide catalystsCO poisoningMetallic materials
The invention provides a preparation method for carbon-supported amorphous metallic nickel, which belongs to the technical field of metallic materials. The carbon-supported amorphous metallic nickel provided in the invention is prepared by using NiCl2.6H2O and ethylene diamine tetraacetic acid as raw materials and employing a hydrothermal process for reduction; amorphous metallic nickel has good dispersibility and a small specific surface area on a carbon support; a fuel cell noble metal catalyst using amorphous metallic nickel as a precursor has the characteristics of good stability, high activity, a long service life and the like, shows good catalytic activity during the process of catalytic oxidation of the anode of a fuel cell and is a high performance catalyst for a fuel cell. Since amorphous metallic nickel can produce electronic effects and synergism together with noble metal atoms (e.g., platinum atoms, palladium atoms, platinum-ruthenium atoms and the like), the catalysis effect of the catalyst is promoted, resistance to CO poisoning of the catalyst is enhanced, the usage amount of noble metals is effectively reduced, and cost for the catalyst is reduced.
Owner:NORTHWEST NORMAL UNIVERSITY
Method for production of hydrogen peroxide with improved yield and selectivity by direct oxidation of hydrogen over palladium containing catalyst
InactiveUS20060120949A1High selectivityHigh yieldHydrogen peroxidePhysical/chemical process catalystsPtru catalystHalogen
A method for improving drastically both the selectivity and yield of hydrogen peroxide in the direct oxidation of hydrogen to hydrogen peroxide over a solid catalyst comprising palladium, which comprises: i) depositing on the solid catalyst at least two halogen containing compounds, one compound essentially comprising bromine and second compound essentially comprising fluorine with the bromine to palladium and fluorine to palladium atom ratios in the range from 0.02 to 20 and from 0.01 to 50, respectively; ii) decomposing the halo compounds deposited on the solid catalyst by calcination at a temperature above 200° C. under inert, reducing or oxidizing gas atmosphere or under vacuum; and iii) contacting the solid catalyst obtained from step (ii) with a gas mixture consisting of hydrogen and oxygen or air or O2 enriched air in an aqueous reaction medium, comprising a mineral acid at the following reaction conditions: concentration of mineral acid in the reaction medium above 0.001 mol / dm3, concentration of the solid catalyst in the reaction medium above 0.01 g / dm3, H2 / O2 mole ratio in the gas mixture in the range from 0.01 to 10, flow rate of the gas mixture in the range from 50 cm3 / g catalyst / h to 50,000 cm3 / g catalyst / h, gas pressure at least 0.9 atm, and temperature below 100° C. and contact period of the reaction medium at least 0.01 h, is disclosed.
Owner:COUNCIL OF SCI & IND RES
Method for producing 1-chloro-2,3,3,3-tetrafluoropropene
ActiveCN109563010AStable implementationEasy to implementPreparation by dehalogenationOrganic chemistry methodsHydrogenGas phase
Provided is an efficient method for producing 1-chloro-2,3,3,3-tetrafluoropropene by reducing 1,1-dichloro-2,3,3,3-tetrafluoropropene, the method generating fewer by-products such as 1,1,1-trifluoropropane and 3,3,3-trifluoropropene that are products of over-reduction. The method for producing 1-chloro-2,3,3,3-tetrafluoropropene is characterized by obtaining 1-chloro-2,3,3,3-tetrafluoropropene byreacting, in a vapor phase, 1,1-dichloro-2,3,3,3-tetrafluoropropene with hydrogen in the presence of a palladium catalyst-supporting carrier that is obtained by having a carrier support a palladium catalyst that comprises chlorine and a metal containing palladium so that the ratio of the number of moles of chlorine atoms to the number of moles of palladium atoms, namely (Cl / Pd), is 2.0 or more.
Owner:ASAHI GLASS CO LTD
Ti/W/Mo oxide in-situ reinforced platinum/palladium nanostructured composite catalyst and preparation method thereof
The invention discloses a Ti / W / Mo oxide in-situ reinforced platinum / palladium nanostructured composite catalyst and a preparation method thereof and belongs to the technical field of material science and the field of electro-catalysis. According to the catalyst, an Al-Ti / W / Mo-platinum (palladium) alloy film is obtained with a magnetron sputtering process, the alloy film is soaked in an alkaline solution or an oxygen-rich acid solution or washed with the alkaline solution or the oxygen-rich acid solution, aluminum is selectively corroded, platinum (palladium) atoms and Ti / W / Mo atoms are released, the Ti / W / Mo atoms exposed on a selective corrosion reaction interface are in a complete activated state and are directly combined with oxygen species in a corrosion solution, nano-oxide is formed and performs combination, inlaying and adhesion with precious metal platinum (palladium) on the reaction interface in an in-situ state, and finally, an oxide in-situ reinforced precious metal nano-composite-structure catalyst is formed. According to the catalyst and the preparation method, the operation is simple, industrial production is easy, the cost is saved, the preparation process is environmental-friendly, the oxide and precious metal are closely combined, and the catalyst is an ideal catalyst for anode electrical oxidation reaction of direct alcohol or formic acid fuel cells.
Owner:TAIYUAN UNIV OF TECH
Preparation method of nickel-plated fiber grating sensor
InactiveCN104406625AAchieve metallizationHigh precisionForce measurement by measuring optical property variationLiquid/solution decomposition chemical coatingFiberGrating
The invention discloses a preparation method of a nickel-plated fiber grating sensor. The method comprises the following steps: first of all, performing surface roughening treatment on a fiber grating, then performing impregnation processing by use of a colloid palladium solution, and then immersing the fiber grating into a dispergation solution to obtain a fiber containing palladium atoms; and immersing the fiber containing the palladium atoms into a plating liquid, plating a layer of metal on the fiber containing the palladium atoms by use of an oxidation reduction reaction to obtain an initially plated fiber, immersing the initially plated fiber into an electroplate solution for electroplating to obtain a metallic nickel galvanized coating, and finally, welding the electroplated fiber grating on a sensor substrate by use of laser to obtain a nickel-plated fiber grating sensor. Compared to the prior art, the method provided by the invention has the following advantages: the metallization of the fiber grating is realized, the fiber grating can be welded on the sensor substrate through a welding mode, relative movement between a fiber core layer and a fiber coating can be prevented, measuring data can truly reflect the stress and strain of an object to be measured, and the sensor accuracy is improved.
Owner:ANHUI POPULAR SCI PROD ENG RES CENT
Palladium-charcoal catalyst as well as preparation method and application thereof
ActiveCN110586081ARestore fastMultiple contact areasMaterial nanotechnologyPreparation by hydrogenationPalladium atomMetal recycling
The invention provides a preparation method of a palladium-charcoal catalyst and further provides the palladium-charcoal catalyst prepared by using the preparation method and application of the palladium-charcoal catalyst. Compared with the prior art, palladium ions which are already adsorbed to a carrier are subjected to in-situ reduction through electrochemical in-situ reduction; compared with aconventional method that a reducing agent is added or electrochemical deposition is implemented, the preparation method is rapid in reduction speed, and the metal palladium takes the shape of sheetsand has a large contact area with the carrier, so that migration and dropping of the palladium metal can be well prevented, and the catalyst is high in stability, high in palladium atom utilization rate and good in catalysis performance; and meanwhile, a high conversion rate and yield can be achieved without adding other metals into the catalyst, and problems of separation and palladium metal recycling caused by conventional preparation methods can be solved.
Owner:ZHEJIANG NHU CO LTD +4
Electrode catalyst for fuel cell, method of preparing the same, membrane electrode assembly and fuel cell including the same
InactiveUS20120196207A1High activityImprove stabilityCell electrodesSolid electrolyte fuel cellsFuel cellsTransition metal atoms
An electrode catalyst for a fuel cell, a method of preparing the same, and a membrane electrode assembly and a fuel cell including the same. The electrode catalyst includes a catalyst particle that incorporates a plurality of palladium atoms, a plurality of atoms of a transition metal, and a plurality of atoms of a precious metal having a higher standard reduction potential than the transition metal, where all of the plurality of atoms of the transition metal are respectively surrounded by at least one of the palladium atoms, the neighboring atoms of the transition metal, or the atoms of the precious metal.
Owner:SAMSUNG ELECTRONICS CO LTD
Platinum nanocage immune probe and preparation method thereof and application thereof in preparing electrochemical immunosensor
InactiveCN105436511AUniform sizeGood reproducibilityMaterial electrochemical variablesPlatinumPalladium atom
The invention discloses a platinum nanocage immune probe and a preparation method thereof and an application thereof in preparing electrochemical immunosensor. According to the invention, cubic platinum nanocage-shaped particles are obtained by substituting platinum atoms for palladium atoms in palladium nano cubic particles. The beneficial effects of the invention are: the method is simple; the obtained platinum nanocage-shaped particles are cubic in shape and have uniform sizes. Experimental results prove that, a cubic nanocage structure has a better catalysis effect than a globular platinum particle does so that the former has a more obvious signal amplification effect. An electrochemical immunosensor prepared by the immune probe which is prepared by platinum nanocage-shaped particles has strong and stable signals and good repeatability; simultaneous detection of double target is realized through marking electric signal material which can be distinguished by peak potential. The platinum nanocage immune probe provided in the invention and electrochemical immunosensors prepared with the same have a large application prospect in the field of immunosense.
Owner:CAPITAL NORMAL UNIVERSITY
Graphene composite coating and preparation method thereof
The invention provides a graphene composite coating. The graphene composite coating comprises the following components in parts by weight: 15-35 parts of modified graphene, 30-45 parts of acrylic ester emulsion, 2-4 parts of an ammonium polycarboxylate salt dispersing agent, 0.5-2 parts of a non-ion type wetting agent, 1-5 parts of calcium bentonite, 12-20 parts of a solvent and 1-3 parts of an addition agent, wherein the modified graphene is palladium doped graphene, the doped mole ratio of palladium atoms in the palladium doped graphene is 0.5-2%, and the acrylic ester emulsion is organic titanium modified acrylic ester emulsion.
Owner:深圳市明鑫高分子技术有限公司
High-dispersion single-atom Pd/mesoporous Al2O3 catalyst, and preparation method and application thereof
ActiveCN110560047AAtom utilization is highHigh catalytic activityHydrocarbon by hydrogenationCatalystsPalladium atomHydrogenation process
The invention provides a high-dispersion single-atom Pd / mesoporous Al2O3 catalyst, and a preparation method and application thereof. According to the invention, mesoporous Al2O3 with more surface defects is synthesized in situ, and palladium atoms are stably loaded on the mesoporous Al2O3 with more defect sites by an atomic lamination technology, so that anchoring with the maximum number of the palladium atoms with unsaturated penta-coordinated Al<3+> in mesopores can be effectively realized, and therefore, the single-atom Pd catalyst with a higher dispersion degree can be prepared. Atomic efficiency can be effectively improved, noble metal can be utilized to the maximum extent, and cost of the catalyst can be reduced. Moreover, the high-dispersion single-atom Pd / mesoporous Al2O3 catalystcan maintain high acetylene selectivity in an acetylene selective hydrogenation process, and ethylene selectivity can be greatly improved.
Owner:ZHEJIANG UNIV OF TECH
Recording layer for optical information recording medium, optical information recording medium, and sputtering target
InactiveCN102483939AHigh-profile systemExcellent recording sensitivityVacuum evaporation coatingSputtering coatingFree energiesPalladium atom
Disclosed are: a recording layer for an optical information recording medium, which has excellent recording properties,an optical information recording medium equipped with the recording layer,and a sputtering target useful for the formation of the recording layer. Specifically disclosed is a recording layer for an optical information recording medium, on which the recording is achieved by means of the irradiation with a laser beam. The recording layer comprises an oxide of a metal X, a palladium oxide and a silver oxide, wherein the metal X is characterized in that an oxide thereof has a higher absolute value of a standard free energy of formation per 1 mol of oxygen than those of palladium and silver, the content ratios of palladium atoms and silver atoms relative to the sum total of the metal X atoms, palladium atoms and silver atoms in the recording layer are 10 to 60 at.% and 5 to 45 at.%, respectively, and the content ratio of the sum total of palladium atoms and silver atoms relative to the sum total of the metal X atoms, palladium atoms and silver atoms in the recording layer is 75 at.% or less.
Owner:KOBE STEEL LTD +1
Synthesis method of hierarchical porous ZSM-5 molecular sieve anchored palladium nanoparticles
The invention discloses a synthesis method of hierarchical porous ZSM-5 molecular sieve anchored palladium nanoparticles, belongs to the technical field of catalysts, and solves the problems of poor noble metal utilization rate, easy high-temperature deactivation and agglomeration and the like in the existing supported catalyst technology. The hierarchical porous ZSM-5 molecular sieve anchored palladium nanoparticle catalyst is obtained by adopting a stepwise method to anchor and disperse palladium nano-particles in a ZSM-5 molecular sieve, along with the consumption of primary crystal seeds in the crystallization process, large-particle palladium nano-particles are excluded out of crystals, small-particle palladium nano-particles are anchored in the molecular sieve crystals, and high-temperature roasting treatment can realize uniform dispersion of the palladium particles. The preparation method of the catalyst provided by the invention is simple, the utilization rate of noble metal palladium is improved, the stability of palladium atoms is improved, and the service life of the catalyst is prolonged. The catalyst has both micropore channel confinement effect and hierarchical porousdiffusion capability, can improve the cracking capability of low-carbon alkanes at active sites, and can promote industrialization of reactions involving the low-carbon alkanes.
Owner:天津金玺科技发展有限公司
High-valent palladium fluoride complexes and uses thereof
InactiveUS20140018538A1Improve propertiesEnhance pharmaceuticallyIn-vivo radioactive preparationsOrganic compound preparationSimple Organic CompoundsPalladium atom
The present invention provides novel high-valent palladium complexes. The complexes typically include multi-dentate ligands that stabilize the octahedral coordination sphere of the palladium(IV) atom. These complexes are useful in fluorinating organic compounds and preparing high-valent palladium fluoride complexes. The invention is particularly useful for fluorinating compounds with 19F for PET imaging.
Owner:PRESIDENT & FELLOWS OF HARVARD COLLEGE
Palladium-doped carbon film material with photovoltaic effect
InactiveCN101807611AWith photovoltaic effectRich reservesFinal product manufacturePhotovoltaic energy generationCarbon filmPalladium atom
The invention provides a palladium-doped carbon film material with photovoltaic effect. A film with the thickness of 20-200nm is sputtered on a 0.5-1.0mm mono-crystalline silicon wafer to manufacture a palladium-doped carbon film / silicon dioxide / silicon material or palladium-doped carbon film / silicon heterogenous junction material, wherein the film with the thickness of 20-200nm is a carbon film with the doped palladium atom content of 0-5%. The material has photovoltaic effect, and can be used for manufacturing solar cells and photosensitive devices; and the manufactured solar cells have higher conversion efficiency, and have simple manufacture process and high finished product ratio.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Ultrafine metal nano frame and preparation method thereof
ActiveCN110076348AHigh purityGood dispersionMaterial nanotechnologyTransportation and packagingSodium hydroxideMaterials science
The invention discloses an ultrafine metal nano frame and a preparation method thereof. The superfine metal nano frame is supported by a nano double cone, the metal nano frame comprises silver atoms and reaction atoms, the nano double cone comprises gold atoms, and the reaction atoms are the gold atoms, palladium atoms or platinum atoms. The preparation method comprises the following steps: a, a gold nano-double-cone solution is added into a cetyl trimethyl ammonium chloride solution, a silver nitrate solution and an ascorbic acid solution are added, and the mixed solution is uniformly shakenin a drying oven to obtain a silver nanorod; b, the silver nanorod is centrifued in a cetyl trimethyl ammonium bromide solution, a sodium hydroxide solution and an ascorbic acid solution are added, and a reaction solution is slowly dropped at room temperature; and c, the sample obtained in the step b is centrifuged in the cetyl trimethyl ammonium bromide solution, an ammonia water solution and a hydrogen peroxide solution are added, and the sample reacts at room temperature. The preparation method is simple in preparation condition, the sample is obtained through the template growth and re-etching process, the conditions are mild, and the operability is high.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Aniline oxime catalyst and preparation method thereof
ActiveCN109467625AImprove thermal stabilityHigh catalytic activityPalladium organic compoundsNickel organic compoundsAnilineStructural formula
The invention relates to an aniline oxime catalyst and a preparation method thereof. The preparation method comprises the following step: reacting a ligand salt compound and a nickel precursor or a palladium precursor and pyridine to obtain the aniline oxime catalyst, wherein the ligand salt compound is by reacting an aniline oxime ligand and a hydrogen drawing agent; the aniline oxime ligand is prepared by reacting an oxime raw material which has the structure as shown in formula (I) and substituted aniline which has the structure as shown in formula (II) shown in the description; the structural formula of a prepared product is shown in the description, wherein R5 is methoxy group, tert-butoxy or benzyloxy; R1 and the R2 are the same and are both selected from hydrogen, methyl, isopropyland benzhydryl; R3 is hydrogen or methyl; R4 is phenyl, methyl or helium atom; L is pyridine, trimethyl-phosphine or triphenylphosphine; and M is nickel or palladium atom. The preparation method is simple in processes; the prepared product is high in catalytic activity under high temperature; and the prepared polymer is of a linear structure.
Owner:DONGHUA UNIV
A kind of preparation method of single-atom dispersed palladium-based catalyst and its catalytic application
ActiveCN107008290BHigh catalytic activityImprove catalytic selectivityHydrocarbon by hydrogenationCatalystsPtru catalystUltraviolet lights
Owner:BEIJING UNIV OF CHEM TECH
Magnetic nano-carbon nitride photocatalyst capable of removing algae and preparation method thereof
PendingCN113318771AImprove separation efficiencyImprove visible light absorptionBiocidePhysical/chemical process catalystsPtru catalystMaterials science
The invention discloses a magnetic nano-carbon nitride photocatalyst capable of removing algae and a preparation method thereof. The photocatalyst takes graphite-phase carbon nitride as a carrier to load noble metal palladium Pd, so the photocatalytic activity of the photocatalyst is improved. The precious metal palladium Pd improves the separation efficiency of photo-generated charge carriers of the semiconductor photocatalyst by capturing electrons, and the surface plasmon resonance (SPR) effect of palladium atoms can greatly improve the visible light absorption rate of the photocatalyst, accelerate the generation of free radicals and promote the growth of photocatalytic oxidation algae. Meanwhile, nano-Fe3O4 is loaded in the photocatalyst provided by the invention, so the photocatalyst has good magnetism, and recovery is completed through a magnetic attraction effect. Therefore, the development of the photocatalyst has important significance on the removal work of harmful algae.
Owner:HANGZHOU NORMAL UNIVERSITY
Organometallic compound, catalyst for polymerization of polar group-containing norbornene and process for producing norbornene polymer
InactiveUS7902109B2High transparencyExcellent polymerOrganic-compounds/hydrides/coordination-complexes catalystsGroup 8/9/10/18 element organic compoundsHybrid compoundNorbornene
Owner:FUJIFILM CORP
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