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675 results about "Platinum Metal" patented technology
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Method for improving catalyst reacting activity in the propylene producing through propane dehydrogenation
InactiveCN101138734AHigh reactivityHigh mechanical strengthMolecular sieve catalystsHydrocarbonsRare earthDehydrogenation
A method to promote the activity of a catalyst for dehydrogenation of propane to propylene is as follows: (1) an inorganic oxide bonding agent, a promoter and an acid solvent are added into a heat-resistant oxide; then after the oxide bonding agent, the promoter, the acid solvent and the oxide are kneaded evenly, the oxide is molded by rolling or band-extruding; (2) the catalyst carrier prepared is dried for 2 to 10 hours under the temperature of 60 centigrade degrees, and calcined under the temperature of 400 to 800 degrees; (3) the calcined carrier is immersed in a rare earth metal water solution under the temperature of 60 to 100 centigrade degrees for 2 to 10 hours; (4) the catalyst carrier modified by the rare earth is immersed in a water solution comprising platinum metal elementsand the fourteenth metal elements under the temperature of 400 to 600 centigrade degrees for 2 to 10 hours, and then the carrier is filtered, washed with distilled water, dried under the temperature of 60 to 180 centigrade degrees for 2 to 10 hours, and calcined under the temperature of 400 to 600 centigrade degrees for 2 to 10 hours; (5) the catalyst prepared is activated in the air under the temperature of 400 to 600 centigrade degrees for 3 to 10 hours, and reduced in a hydrogen flow under the temperature of 400 to 600 centigrade degrees for 2 to 10 hours; the reduced catalyst is used for catalytic reaction for dehydrogenation of propane to propylene.
Owner:SOUTHEAST UNIV
Biocompatible bonding method and electronics package suitable for implantation
The invention is directed to a method of bonding a hermetically sealed electronics package to an electrode or a flexible circuit and the resulting electronics package, that is suitable for implantation in living tissue, such as for a retinal or cortical electrode array to enable restoration of sight to certain non-sighted individuals. The hermetically sealed electronics package is directly bonded to the flex circuit or electrode by one of several methods, including attachment by an electrically conductive adhesive, such as epoxy or polyimide, containing platinum metal flake in biocompatible glue; diffusion bonding of platinum bumps covered by an insulating layer; thermal welding of wire staples; or an integrated interconnect fabrication. The resulting electronic device is biocompatible and is suitable for long-term implantation in living tissue.
Owner:SECOND SIGHT MEDICAL PRODS +1
Electrocatalyst for oxygen reduction with reduced platinum oxidation and dissolution rates
InactiveUS20060263675A1Low platinum loadingImprove stabilityMaterial nanotechnologyConductive materialOxide compositeDissolution
The invention relates to platinum-metal oxide composite particles and their use as electrocatalysts in oxygen-reducing cathodes and fuel cells. The invention particularly relates to methods for preventing the oxidation of the platinum electrocatalyst in the cathodes of fuel cells by use of these platinum-metal oxide composite particles. The invention additionally relates to methods for producing electrical energy by supplying such a fuel cell with an oxidant, such as oxygen, and a fuel source, such as hydrogen.
Owner:BROOKHAVEN SCI ASSOCS
Synergistic catalyst system and process for carrying out hydrosilylation reactions
The invention relates to a process for the transition metal-catalyzed addition of SiH-containing poly-siloxanes onto olefinic compounds, wherein the catalyst used is a combination of at least two compounds of platinum metals, and also to a corresponding catalyst system.
Owner:EVONIK DEGUSSA GMBH
Layered exhaust treatment catalyst
ActiveUS20050282701A1Internal combustion piston enginesOther chemical processesMonitoring systemCordierites
A layered exhaust treatment catalyst comprising: (a) a carrier such as cordierite; (b) a first layer deposited on the carrier comprising a palladium metal component, a platinum metal component and an oxygen storage component such as ceria supported on a refractory metal oxide such as gamma-alumina; and (c) a second layer deposited on the first layer comprising a rhodium metal component, a platinum metal component and an oxygen storage component such as ceria supported on a refractory metal oxide such as gamma-alumina. Preferably, the catalyst also includes a bottom layer interposed between the carrier and the first layer. The bottom layer comprises an oxygen storage component such as ceria supported on a refractory metal oxide such as gamma-alumina. The amount of the oxygen storage component of the catalyst may be “tuned”, i.e., adjusted, to meet the needs of a vehicle's on-board diagnostic (“OBD”) catalyst efficiency monitoring system, without adversely affecting the performance of the catalyst.
Owner:BASF CORP
Layered exhaust treatment catalyst
ActiveUS7795172B2Molecular sieve catalystsInternal combustion piston enginesCerium(IV) oxideMonitoring system
Owner:BASF CORP
Synthesis of Metal-Metal Oxide Catalysts and Electrocatalysts Using a Metal Cation Adsorption/Reduction and Adatom Replacement by More Noble Ones
InactiveUS20070264189A1Improve stabilityReducing and preventing oxidationCell electrodesGold compoundsHydrogenFuel cells
The invention relates to platinum-metal oxide composite particles and their use as electrocatalysts in oxygen-reducing cathodes and fuel cells. The invention particularly relates to methods for preventing the oxidation of the platinum electrocatalyst in the cathodes of fuel cells by use of these platinum-metal oxide composite particles. The invention additionally relates to methods for producing electrical energy by supplying such a fuel cell with an oxidant, such as oxygen, and a fuel source, such as hydrogen. The invention also relates to methods of making the metal-metal oxide composites.
Owner:BROOKHAVEN SCI ASSOCS
Catalyst for eliminating formaldehyde in air by low-temperature catalytic oxidation
InactiveCN101497042AEasy to prepareEasy to operateDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsManganese oxideCarbon dioxide
The invention relates to a catalyst for eliminating formaldehyde by catalytic oxidation at low temperature in air. The catalyst contains manganese oxide, noble metal platinum and an addition agent, namely rare earth oxide, alkali or alkaline earth oxide. The catalyst has high catalytic oxidation activity to formaldehyde, and can completely oxidize the formaldehyde into carbon dioxide and water at room temperature. The catalyst has the advantages of simple and convenient preparation and low cost, and is suitable for industrial application.
Owner:EAST CHINA UNIV OF SCI & TECH
Method for smelting and extracting platinum metal from alumina-supported petrochemical catalyst
The invention discloses a method for smelting and extracting platinum metal from an alumina-supported petrochemical catalyst, and the method comprises the following steps: mixing the alumina-supported petrochemical catalyst with a trapping agent, a reductant and a slag forming agent and then smelting to trap the platinum metal from the alumina-supported petrochemical catalyst to obtain subsidiary product and alloy containing the platinum metal; using a sulfuric acid solution to dissolve the alloy containing the platinum metal to separate noble metal and base metal so as to obtain noble metal ore; and refining the noble metal ore to obtain the platinum metal product. The method disclosed by the invention has the characteristics that the process design does not produce wastewater, the wastewater treatment and filtration difficulty in a wet treatment process of the alumina-supported petrochemical catalyst are avoided, the recycling rate is higher than 98%, and the product purity is 99.95%.
Owner:KUNMING INST OF PRECIOUS METALS
Catalyst for preparing propylene by propane dehydrogenation as well as preparation and application thereof
InactiveCN101411978AThe content of any component is easy to controlLarge specific surface areaHydrocarbonsMetal/metal-oxides/metal-hydroxide catalystsRare-earth elementPtru catalyst
The invention relates to the field of organic chemistry, in particular to a catalyst for dehydrogenating propane to prepare propylene. The catalyst for dehydrogenating propane to prepare propylene uses gamma-Al2O3 as a carrier, platinum metal and tin metal as main catalysts and a zinc metal element and a rare earth metal element as additives. The mass percentage of platinum is between 0.01 and 2 percent; the mass percentage of Sn is between 0.1 and 5 percent; the mass percentage of zinc in the catalyst is between 0.1 to 5 percent; and the mass percentage of rare earth metal elements is between 0.1 and 5 percent. The invention discloses a method for preparing the catalyst and an application method. The catalyst has the advantages that the catalyst with four compositions is prepared by adopting a continuous isometric dipping method; and the content of any composition is easy to control. The prepared catalyst has high specific surface area and high catalytic activity; propane has high transformation rate; and propylene has good selectivity. The catalyst has long one-way service life and good industrial application prospect.
Owner:NANKAI UNIV +1
Positive Ignition Engine and Exhaust System Comprising Three-Way Catalysed Filter
InactiveUS20140234189A1Nitrogen compoundsInternal combustion piston enginesPorous substratePtru catalyst
A positive ignition engine is disclosed. The engine comprises an exhaust system comprising a filter for filtering particulate matter from the emitted exhaust gas. The filter comprises a porous substrate having inlet surfaces and outlet surfaces. The porous substrate is coated at least in part with a three-way catalyst washcoat comprising a platinum group metal and a plurality of solid particles. The plurality of solid particles comprises at least one base metal oxide and at least one oxygen storage component which is a mixed oxide or composite oxide comprising cerium. The mixed oxide or composite oxide comprising cerium and / or the at least one base metal oxide has a median particle size (D50) less than 1 μm. The platinum group metal platinum and rhodium; palladium and rhodium; platinum, palladium and rhodium; palladium only; or rhodium only. A process for treating exhaust gas using the filter is also disclosed.
Owner:JOHNSON MATTHEY PLC
Single-component heat-curing liquid silicone rubber and preparation method thereof
The invention belongs to the field of liquid silicone rubber, and particularly relates to single-component heat-curing liquid silicone rubber and a preparation method thereof. Ethenyl polysiloxane is used as base rubber, hydrogen polysiloxane is used as a cross-linking agent, a complex of transition metal platinum is used as a catalyst, an alkynol mixture is used as an efficient polymerization inhibitor, aluminum oxide and aluminium nitride are used as heat conductive fillers, a silane coupling agent is used as a tackifier, aluminium hydroxide is used as a fire retardant, and fumed silica is used as a reinforcing agent. As a process is strictly controlled, and a process route that raw materials are treated and dried in advance, and mixed at room temperature to prepare the rubber is adopted, the low-viscosity single-component heat-curing silicone rubber is prepared. The fire retardant single-component heat-curing liquid silicone rubber can be stored for a long term at normal temperature, is low in viscosity, single in component, good in heat conductivity and temperature tolerance, and good in adhesion with a base material.
Owner:CHENGDU TALY TECH CO LTD
Catalyst for a diesel particulate filter
A Diesel soot catalyst has ceria and platinum present in a Diesel particulate filter in a ratio, by weight, of ceria to platinum of at most about 75. This catalyst allows for the use of very small amounts of platinum metal while still achieving low balance point temperatures for burning of Diesel soot.
Owner:ZIEBARTH ROBIN +2
Platinum-based selective hydrogenation catalyst as well as preparation method and use thereof
ActiveCN101502797AHigh activityGood dispersionOrganic compound preparationAmino compound preparationActivated carbonActive component
The invention relates to a platinum-based selective hydrogenation catalyst. The catalyst uses active carbon as a carrier; and based on the total mass of the catalyst, in terms of mass content, the content of active component platinum metal is 0.5 to 5 percent, and the grain diameter of the platinum metal is less than 30 nanometers. The invention also relates to a preparation method for the catalyst: after the active carbon is subjected to ultrasonic treatment by nitric acid solution with a certain concentration, the active carbon is repeatedly washed by deionized water to be neutral and then added into PtCl2 aqueous solution with a certain pH value to carry out ultrasonic immersion, the solution is filtered, a filer cake is pulped and then reduced by using a chemical reduction method and filtered and washed until no chloride ion exist, and the filter cake is transferred into an oven to be dried to form a nano Pt / active carbon catalyst. The invention further relates to application of the catalyst. The catalytic hydrogenation activity of the catalyst is good, the selectivity is high, the catalyst can effectively inhibit dechlorination without adding dehalogenation inhibitor, the preparation process is simple to operate, and the platinum metal is easy to recover.
Owner:XIAN CATALYST NEW MATERIALS CO LTD
Low surface roughness electrolytic copper foil and process for producing the same
A low-roughness electrolytic copper foil having a roughness Rz of 2.5 μm or less and having a tensile strength of 500 MPa or more at 25° C. measured within 20 minutes from the end of electrodeposition, and at the same time, from the end of electrodeposition The reduction rate of the tensile strength at 25° C. measured after 300 minutes has elapsed is 10% or less, and the elongation at 180° C. is 6% or more. A method for manufacturing electrolytic copper foil, the electrolytic copper foil uses a sulfuric acid-copper sulfate aqueous solution as an electrolyte, uses an insoluble anode made of titanium coated with a platinum metal element or an oxide element thereof, and a titanium anode opposite to the anode A cathode cylinder, a direct current is passed between the two electrodes, wherein hydroxyethyl cellulose, polyethyleneimine, sulfonates of active organic sulfur compounds, acetylene glycol and chloride ions are present in the above electrolyte.
Owner:FUKUKA METAL FOIL & POWDER CO LTD
Catalyst selective oxidation reaction of hydrogen gas
ActiveCN101428217AImprove combustion activityReactiveCatalyst activation/preparationHydrocarbonsAlkanePorous coating
The invention relates to a catalyst used in a selective oxidation reaction of hydrogen gas, and mainly solves the problems of low catalytic activity, poor selectivity and heavy loss of dehydrogenation chemical materials. In order to solve the problems, the technical scheme is as follows: the catalyst used in the selective oxidation reaction of hydrogen gas comprises a layered composite carrier, which comprises an inert carrier inner core and a porous coating as an outer layer conjugated on the inner core; and at least one platinum metal selected from Ru, Rh, Pd, Os, Ir and Pt, at least one modifier selected from alkali metals and alkaline earth metals, and at least one catalyst promoter selected from IVA compounds are loaded on the layered composite carrier. The catalyst is applied to the selective oxidation reaction of hydrogen gas in the industrial production of unsaturated hydrocarbons by alkane dehydrogenation or aromatic hydrocarbon dehydrogenation.
Owner:CHINA PETROLEUM & CHEM CORP +1
Anti-sintering catalyst for preparing low-carbon olefin by low-carbon alkane dehydrogenation and preparation method thereof
ActiveCN103418376AReduce aggregationImprove anti-coking performanceHydrocarbonsMetal/metal-oxides/metal-hydroxide catalystsAlkaneWater vapor
The invention relates to a platinum-tin catalyst of low-carbon alkane dehydrogenation and a preparation method thereof, and mainly solves the problem that in the prior art, in high temperature and carbon burning processes of a catalyst, metal platinum particles are easy to coalesce to grow up to affect the stability of the catalyst. According to the platinum-tin catalyst of low-carbon alkane dehydrogenation and the preparation method thereof, a technical scheme is adopted to well solve the problem, the technical scheme is shown as follows: first introducing assistants of alkalinous metals such as calcium, magnesium and the like into an alumina carrier by a coprecipitation method to get a compound metal oxide carrier, then using a dipping method to load tin and platinum components, namely dipping an aqueous solution of soluble salts of the platinum and tin components, and thus obtaining the platinum-tin catalyst by drying, roasting and water vapor treatment. The platinum-tin catalyst of low-carbon alkane dehydrogenation and the preparation method thereof can be used in industrial preparation of the catalyst for preparing low-carbon olefin by low-carbon alkane dehydrogenation.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for coating a surface
Metal surfaces, metal-oxide surfaces, metal-salt surfaces, silicon-comprising surfaces and / or high-molecular-weight aquoxide-comprising organic surfaces are coated. The coating is carried out with a reagent having a reactive group chosen from Si-H, Sn-H, and Ge-H. The reagent is applied in liquid, pasty, or solid form to the surface that is to be coated. Furthermore, the coating reaction requires the presence of an activator. A platinum metal in form of a compound or in metallic form is used as activator.
Owner:GLOBAL SURFACE
Single metal/multi-wall carbon nano tube type composite material, preparation method and application thereof
InactiveCN101820066AProportional controlOvercome uniformity issuesCell electrodesMetal/metal-oxides/metal-hydroxide catalystsCarbon compositesCatalytic oxidation
Owner:BEIJING UNIV OF CHEM TECH
Light alkane dehydrogenation catalyst and preparation method
ActiveCN104275179AHigh catalytic activityImprove redispersionHydrocarbonsMetal/metal-oxides/metal-hydroxide catalystsRare-earth elementAlkane
The invention relates to a light alkane dehydrogenation catalyst for preparation of light olefins and a preparation method thereof. The invention mainly solves the problem that a present catalyst has low mechanical strength and is easy to crush and carbon deposit and inactivation easily happen under high-temperature condition to influence single-pass stability of the catalyst. According to the invention, a light alkane dehydrogenation catalyst for preparation of light olefins is adopted, wherein the catalyst contains platinum metals, group IVA element, group IA or IIA element, group IIB element and group VIIA element of the Periodic Table of the Elements, rare earth element and a carrier aluminium oxide. By the technical scheme, the above problem is solved well. The preparation method can be used in industrial production of the light alkane dehydrogenation catalyst for preparation of light olefins.
Owner:CHINA PETROLEUM & CHEM CORP +1
Nano porous gold-loaded ultrathin platinum metallic film catalyst and preparation method thereof
InactiveCN101332425AReduce loadPrecise thickness controlMetal/metal-oxides/metal-hydroxide catalystsMicrometerAlloy
The invention discloses a nanoporous gold supported ultrathin platinum metal film catalyst; the catalyst is an alloy sheet which is 0.1 - 100 micrometer thick, 0.1 - 10cm wide, and 0.1 - 20cm long, and is uniformly covered with a platinum metal atom layer on the surface thereof; the invention takes the method of under-potential depositing copper, silver or lead on the nanoporous gold and then performing exchange with the platinum metal cations to deposit the platinum metal film on the surface of the porous gold, thus obtaining the nanoporous gold supported ultrathin platinum metal film catalyst. The catalyst material prepared by the method of the invention can be easily controlled with regards to the aperture size, pore wall thickness and the platinum metal film thickness; and the catalyst is characterized by high specific surface area, high utilization ratio of the platinum metal, good catalytic activity and high anti-poisoning property.
Owner:SHANDONG UNIV
Propane dehydrogenation catalyst and preparation method thereof
ActiveCN108325523AImprove conversion rateHigh selectivityMaterial nanotechnologyCatalyst carriersMagnesium AluminateChemistry
The invention discloses a propane dehydrogenation catalyst, which is obtained by loading metal platinum on magnesium aluminate spinel carriers, wherein the metal platinum of the catalyst is in a one-dimensional or two-dimensional highly dispersed state on the surface of the carrier; platinum atoms exist in a single atom or sub-nanometer cluster form; the particle diameter of the sub-nanometer cluster is smaller than 1nm. The invention also discloses a preparation method of the propane dehydrogenation catalyst. Compared with a catalyst prepared by the existing method, the obtained propane dehydrogenation catalyst has the advantages that the conversion rate and the selectivity are obviously improved; the stability is high; good application prospects are realized.
Owner:贵研工业催化剂(云南)有限公司
Micro Pirani gage
ActiveCN101608962AReduce volumeReduce weightTelevision system detailsPiezoelectric/electrostriction/magnetostriction machinesManufacturing technologyEngineering
A micro Pirani gage belongs to vacuum degree measuring element of micro electro mechanical system, aiming at overcoming the problems of large volume and not high enough sensibility of the existing micro Pirani gage. In the invention, a groove is arranged on a silicon substrate, a thermal isolation layer is arranged on the surface of the groove, an insulating layer is covered on the surface of the thermal isolation layer, a heating body is sputtered on the insulating layer, and the two ends of the heating body are sputtered with a metal electrode; wherein the heating body is made by platinum or nickel metal in bend shape; the insulating layer material is silicon nitride or silicon oxide; and the thermal isolation layer material is one or two of silicon oxide and silicon nitride. The invention has small volume, light weight and stable performance, the heating body adopts platinum metal, and the platinum metal has good linearity, stable performance, high sensibility and favourable chemical stability; and the invention has simple manufacturing technology, low cost, high yield and high reliability. The invention is applicable to vacuum degree real time detection in various vacuum encapsulation and micro cavities.
Owner:HUAZHONG UNIV OF SCI & TECH
Solid phase extraction process for extracting and separating palladium
InactiveCN101020964AEasy to separateShorten the timeProcess efficiency improvementIridiumMicrosphere
The solid phase palladium extracting and separating process for extracting and separating palladium from platinum metal concentrate or secondary noble metal enriching material features that palladium is separated from platinum, rhodium, iridium and base metals Cu, Ni, Fe, etc by means of polymer microsphere with bonded palladium extractant as fixing phase, hydrochloric acid solution containing metals as the flowing phase, dilute hydrochloric acid solution as the leaching solution and reagent solution capable of being complexed with palladium as the eluting liquid. The solid phase extracting column may be regenerated with dilute hydrochloric acid solution for reuse. The process of the present invention has high separating effect, high platinum, palladium and rhodium recovering rate, low cost and other advantages.
Owner:YUNNAN UNIV
Platinum (Pt)/reduced graphite oxide (RGO) nano composite material and preparation method and application thereof
ActiveCN102751101ACheap and easy to getImprove securityElectrolytic capacitorsCapacitanceGraphene nanocomposites
The invention discloses a platinum (Pt) / reduced graphite oxide (RGO) nano composite material and a preparation method and application thereof. According to the preparation method, graphite oxide (GO) and a platinum metal precursor are reduced in one step by radiation and induction of a gamma ray or an electronic beam, thus obtaining the Pt / RGO nano composite material with the Pt load capacity being 1.0wt% to 15wt%; Pt nano particles are uniformly distributed on an RGO sheet layer, and the average diameter of the Pt nano particles is 1.8 nanometers; and the particle sizes of the Pt nano particles are within 2 nanometers. By virtue of the load capacity of the nano particles of platinum metal, the reducing degree of the GO can be increased, the conductivity of a product is improved, and the surface utilization rate of the RGO sheet layer is increased. Compared with the GO and pure graphene, the nano composite material prepared by the method has higher specific capacitance and higher high-current multiplying power when being applied to a super-capacitor electrode material.
Owner:PEKING UNIV
Method for recovering platinum metal from waste catalyst
InactiveCN104263945AReduce the amount of dissolutionLow Aluminum Salt ContentProcess efficiency improvementPre treatmentOrganic matter
The invention discloses a method for recovering platinum metal from a waste catalyst. The method comprises the following steps: (1) roasting pretreatment: roasting the waste catalyst at a certain temperature to remove surface carbon deposits and other organic matters; (2) normal-temperature immersion: placing the pretreated waste catalyst in a soaking pool, adding a certain amount of reducing solution for immersion, adding an oxidizing solution, and performing repeated immersion for many times to obtain a platinum metal-containing solution; (3) metal replacement: regulating the acidity of the platinum metal-containing solution, adding reducing metal for replacement, and performing solid-liquid separation to obtain crude platinum metal; (4) refining of the platinum metal: dissolving, refining and purifying the crude platinum metal to obtain high-purity platinum metal. According to the method, the recovery rate of the platinum metal is higher than 98 percent, and the purity of the platinum metal is 99.95 percent; an alumina carrier waste platinum metal catalyst in the industries of petroleum, fine chemistry and the like can be treated, and a process is simple and easy to industrially implement.
Owner:KUNMING INST OF PRECIOUS METALS
Platinum supported nitrogen-doped molybdenum disulfide photocatalyst and preparation method thereof
ActiveCN105618098AGood hydrogen production capacityAnd stable hydrogen production capacityHydrogen productionHydrogen/synthetic gas productionElectrochemistryHydrogen production
The invention provides a platinum supported nitrogen-doped molybdenum disulfide photocatalyst and a preparation method thereof. The method comprises the following steps: with sodium molybdate and thioacetamide as raw materials, preparing molybdenum disulfide nanoplates via a hydrothermal method; performing thermal treatment on the molybdenum disulfide nanoplates in an ammonia atmosphere to obtain nitrogen-doped molybdenum disulfide nanoplates; and finally, loading precious metal platinum on the nitrogen-doped molybdenum disulfide nanoplates via a photo reduction method to obtain the platinum supported nitrogen-doped molybdenum disulfide photocatalyst. With the platinum supported nitrogen-doped molybdenum disulfide photocatalyst, molybdenum disulfide is taken as a photocatalyst to produce hydrogen from water by visible light catalytic decomposition for the first time. The platinum supported nitrogen-doped molybdenum disulfide photocatalyst has excellent visible light catalytic hydrogen production capability and excellent stability. The preparation method is simple to operate, the photocatalyst is good in repeatability, and the application of molybdenum disulfide in the aspects of photocatalysis and electrochemistry is expanded.
Owner:XI AN JIAOTONG UNIV
Graphene dye sensitized solar cell and production method thereof
InactiveCN102148099AMaterials are readily availableLow costLight-sensitive devicesFinal product manufactureSputteringSolar cell
The invention discloses a graphene dye sensitized solar cell and a production method thereof. The solar cell comprises a light anode comprising transparent upper base material and graphene conducting layer, a porous nano semiconductor film and a dye sensitizer, oxidation reduction electrolyte solution, a counter electrode comprising a lower base and graphene conducting layer and a composite catalytic layer as well as a film shell. The production method comprises the steps of preparing the light anode, preparing the counter electrode, encapsulating and injecting the electrolyte solution. In the invention, graphene with an available raw material, low cost, good conductive performance, extremely high flexibility and good ductibility is adopted as the conducting layer, the flexible transparent material is adopted as a substrate, and platinum metal particles are embedded on the graphene conducting layer of the counter electrode by adopting adsorption instead of magnetron sputtering to form the composite catalytic layer. Thus, the invention has the characteristics that the raw material is available, the production cost is low, the production process is simple and reliable, the flexible solar cell can be produced and applied to the flexible field, and the application range is effectively expanded.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Catalyst in a highly active hydrogenation reaction of aromatic nitro compounds and preparation method thereof
InactiveCN102274724AHigh catalytic activityImprove catalytic stabilityOrganic compound preparationAmino compound preparationNitro compoundPtru catalyst
The invention discloses preparation of a high-activity graphene-load platinum catalyst and application of the catalyst to a hydrogenation reaction of an aromatic nitro-compound, in particular to a high-activity catalyst used in a hydrogenation reaction of an aromatic nitro-compound and a preparation method thereof. A carrier of the catalyst is graphene; and an active ingredient is metal platinum.Specific to the current situation of small application range of graphene and large difficulty in large-scale preparation and application, ethylene glycol is taken as a reducing agent in the method, and Pt nanoparticles are successfully and uniformly loaded on a graphene oxide nano-sheet and are applied to the hydrogenation reaction of the aromatic nitro-compound, so that the high-activity graphene-load platinum catalyst represents catalytic activity which is remarkably superior to that of a Pt catalyst loaded with a normal carbon carrier.
Owner:ZHEJIANG UNIV
Coal ash roller type fine extractive technique
InactiveCN101200305ACompletely zero emissionsIron oxides/hydroxidesSolid waste disposalFerric hydroxideBrick
The invention relates to a powder coal ash rolling-type fine extraction method which can effectively peel and dissolve extractive, serially extract active silica, ferric hydroxide, iron oxide red, magnesium hydrate, calcium hydroxide, barium sulfate, lithium carbonate and lanthanide series and actinium series rare earth hydroxide with an enrichment amount >=0.01%, manganese, copper, zinc and gallium with an enrichment amount >=0.05%, and germanium dioxide, vanadium pentoxide, gold, silver, palladium and platinum metal with an enrichment amount >=0.0001% from the powder coal ash. The powder coal ash rolling-type fine extraction method has the advantages that the remainder ash of the powder coal ash after the treatment by the rolling-type fine extraction technique can be still comprehensively used for making brick and blending coagulation, thereby fully using the powder coal ash and realizing zero emission.
Owner:李文志 +1
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