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33results about How to "Low platinum loading" patented technology
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Platinum- and platinum alloy-coated palladium and palladium alloy particles and uses thereof
ActiveUS20060135359A1Improved oxygen-reducing catalytic activityLow platinum loadingSynthetic resin layered productsCellulosic plastic layered productsAlloyOxygen
The present invention relates to particle and nanoparticle composites useful as oxygen-reduction electrocatalysts. The particle composites are composed of a palladium or palladium-alloy particle or nanoparticle substrate coated with an atomic submonolayer, monolayer, bilayer, or trilayer of zerovalent platinum atoms. The invention also relates to a catalyst and a fuel cell containing the particle or nanoparticle composites of the invention. The invention additionally includes methods for oxygen reduction and production of electrical energy by using the particle and nanoparticle composites of the invention.
Owner:BROOKHAVEN SCI ASSOCS
Catalyst particles comprising a layered core-shell-shell structure and method of their manufacture
ActiveUS20140171290A1Improve performanceLow platinum loadingCatalyst protectionCell electrodesFuel cellsGas phase
The present invention is directed to catalyst particles comprising a layered core-shell-shell structure and to a method of their manufacture. The catalyst particles have the general formula BM / IL / PM in which BM is a base metal core (selected from Co, Ni or Cu), PM is a precious metal outer shell (selected from Pt, Ir or Pd) and IL is an intermediate layer comprising a base metal / precious metal alloy with a concentration gradient of base metal to the outside PM layer. The particles of the present invention comprise a core-shell-shell structure and a substantially continuous precious metal shell layer. They find use in various catalytic applications, for example in gas-phase catalysis, in electrocatalysts for fuel cells, in catalytic converters for automobiles and in electronic or medical applications.
Owner:UMICORE AG & CO KG
Method for preparing proton exchange membrane fuel cell electrode with high catalyst utilization ratio
InactiveCN101626083AIncrease profitLow platinum loadingCell electrodesIon exchangePerfluorosulfonic acid
The invention provides a method for preparing a proton exchange membrane fuel cell electrode with high catalyst utilization ratio, which comprises the following steps: firstly, constructing a gas porous electrode having a complete electron channel, a gas channel and a proton channel; secondly, exchanging platinum cations onto perfluorosulfonic acid resin of the gas porous electrode by an ion exchange method; thirdly, reducing the platinum cations onto a carbon carrier contacted with the perfluorosulfonic acid resin by an electrochemical reduction method, thus, the proton exchange membrane fuel cell electrode with high catalyst utilization ratio is prepared. The invention has the advantages of simple process and low cost. The proton exchange membrane fuel cell electrode with high catalyst utilization ratio prepared by using the invention has the advantages of high catalyst utilization ratio, low platinum capacity, good dispersion of platinum nano-particles, controllable size, and the like, and can replace the prior commercial platinum / carbon (Pt / C) catalyst.
Owner:CHONGQING UNIV
Method for carbon supported ultra-low platinum catalytic electrode preparation by indirect galvanic deposit
InactiveCN101359744AGood dispersionGood size controlCell electrodesFuel cell detailsPlatinum saltsPorous carbon
The invention provides a method for preparing a carbon-supported ultra-low platinum catalytic electrode by means of indirect electrodeposition, which belongs to the fuel cell technique field. The method comprises the steps: transition metal M (such as: Cu, Co, Ni and the like) nano-particles in an aqueous solution are highly dispersed and deposited on a porous carbon electrode (PCE) bonded with perfluoro-sulfonated resin through a four-step electrodeposition method, then the obtained M / PCE electrode is immerged into a platinum salt solution for preparing the carbon-supported ultra-low platinum catalytic electrode through displacement reaction. The invention has the advantages of simple process and low costs. The prepared carbon-supported ultra-low platinum catalytic electrode has the advantages of low platinum loading, high electro-catalytic performance, good dispersion of platinum nano-particles and controllable sizes, and can replace the existing commercial platinum carbon (Pt / C) catalyst.
Owner:CHONGQING UNIV
Electrospinning and electrostatic spraying method for membrane electrode CCM
PendingCN106848355AIncrease active areaIncrease profitLiquid surface applicatorsCell electrodesPorosityConcentration polarization
The present invention discloses an electrospinning and electrostatic spraying method for a membrane electrode CCM. According to the present invention, the catalyst layer having the nanometer film structure is obtained by using the electrospinning and electrostatic spraying method, wherein the catalyst layer structure has a high specific surface area so as to increase the three-phase reaction interface, increase the active area of the catalytic layer, and improve the catalyst utilization rate; the polymer nano-fiber membrane has high porosity, such that the mass transfer is easily performed, and the concentration polarization is effectively reduced; and the nano-scale catalytic particles obtained through electrostatic spraying are uniformly distributed on the nano-fiber structure so as to reduce the platinum loading and improve the catalytic performance.
Owner:NANJING UNIV
Platinum/carbon catalyst and application thereof
InactiveCN1631523ALow platinum loadingHigh activityOrganic chemistryMetal/metal-oxides/metal-hydroxide catalystsSolventNitrobenzene
The invention concerns catalyst field, specific speaking, it's a Bo / C catalyst and its application. The catalyst is got by sulphur poison of Bo / C, specific steps: when mixing, dip the Bo water-soluble compound in the water to get Bo, take sulphur poison of parts, at solid restore, filter, wash and dry and so on. The catalyst can be used in the reaction of 4-ammonia benzene fen, especially in the reaction of the acid solution to produce 3-F-4-ammonia benzene fen, having best efficiency. When it reaches rate 100%, 3-F-4-ammonia benzene fen rate can reaches 91.7%. The Bo / C catalyst of the invention has high activation and high choosing feature can be used recycle, so it has high economy efficiency.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Pt-M metal alloy catalyst prepared by electro-deposition in organic system
ActiveCN110021758ASmall differenceEasy to manufactureMaterial nanotechnologyFuel and secondary cellsOxygenMolar concentration
The invention discloses a Pt-M metal alloy catalyst prepared by electro-deposition in an organic system. A catalyst conductive carrier is carbon-based, and in an organic solvent, Pt-M metal alloy nanoparticles prepared by co-deposition of Pt-M metal are uniformly dispersed on a surface of the carrier by a physical loading mode; during the preparation process, a Pt source precursor and an M sourceprecursor are dissolved in the organic solvent, and the volume mole concentration of the metal precursor in a mixed solution is (1-20)mmol / L; and moreover, oxygen in the solution is discharged under protection of an inertia atmosphere, deposition under subsequent different deposition potentials is performed, and cycle voltammetry electrochemical cleaning is performed. In the catalyst disclosed bythe scheme of the invention, the purposes of further reducing the platinum-loading quantity of the prepared Pt-M metal alloy nanoparticle catalyst, improving the catalytic activity, greatly improvingthe precious comprehensive utilization efficiency, improving the oxygen-reduction performance and reducing comprehensive cost of the precious metal catalyst are achieved.
Owner:SHANGHAI JIAO TONG UNIV
Gas diffusion electrodes, membrane-electrode assemblies and method for the production thereof
ActiveUS20050279643A1Excellent characteristicHigh utilization factorFinal product manufactureElectrode carriers/collectorsChemistryElectrically conductive
Owner:BASF FUEL CELL
Method for preparing Nano platinum carried catalysis electrode in Nano crystal sensitized solar battery
InactiveCN1797793ALow platinum loadingReduce manufacturing costLight-sensitive devicesFinal product manufacturePlatinumManufacturing technology
Using self-assembly technique loads Nano granules of platinum in hydrosol of compositive Nano platinum to surface of conducting substrate of containing mercaptan functional group after modification of L-B membrane or silanization so as to realize even, tight and discontinuous distribution of Nano granules of platinum on surface of conducting substrate. Using high sintering or vacuum treatment in low temperature forms Nano platinum carried catalysis electrode in high chemical activity. Electrode produced in the invention possesses very low platinum load so as to lower cost for preparing solar battery. The invention is applicable to preparation of flexible electrode, especially suitable to electrode pair in Nano crystal sensitized solar battery.
Owner:INST OF CHEM CHINESE ACAD OF SCI
Noble metal nanoparticles, a process for preparing these and their use
InactiveUS20060188772A1Suitable as temporary stabilisersEasy to disassembleMaterial nanotechnologyTransportation and packagingNanoparticleAqueous solution
Nanoparticles which contain noble metals alone or noble metals in combination with base metals. The nanoparticles are embedded in an aqueous solution of a temporary stabilizer based on a polysaccharide.
Owner:UMICORE AG & CO KG
Gas diffusion electrodes, membrane-electrode assembles and method for the production thereof
ActiveUS20060234111A1Uniform permeabilityIncrease useful catalytic surfaceFinal product manufactureElectrode carriers/collectorsChemistryElectrically conductive
A method for forming a patterned noble metal coating on a gas diffusion medium substantially free of ionomeric components comprising subjecting an electrically conductive web with a patterned mask overlaid thereto to a first ion beam having an energy not higher than 500 eV, and to a second beam having an energy of at least 500 eV, containing the ions of at least one noble metal and a gas diffusion electrode.
Owner:BASF FUEL CELL
Catalyst based on varisized platinum-zinc nanoparticles loaded on zinc-containing monatomic carbon-nitrogen carrier, preparation method and application thereof
PendingCN111686782AImprove electrocatalytic activityHigh catalytic activityMetal/metal-oxides/metal-hydroxide catalystsElectrodesPtru catalystActive agent
The invention discloses a catalyst based on varisized platinum-zinc nanoparticles loaded on a zinc-containing monatomic carbon-nitrogen carrier, a preparation method and application thereof. The preparation method of the catalyst comprises the following steps of: preparing platinum nanoparticles with different sizes by using an alcohol reduction method, then encapsulating the prepared platinum nanoparticles in a metal organic framework, modifying the metal organic framework by using a surfactant, and then performing calcining at high temperature. At a certain temperature, the influence of thenanoparticle size on the reaction is explored, and at 600-900DEG C, the influence of the calcination temperature on the monatomic content and on the nanoparticle reaction is explored. The catalyst provided by the invention is low in preparation cost, has excellent electrocatalytic activity, super-strong stability and methanol resistance in an electrochemical oxygen reduction reaction, and obviously improves the electrochemical oxygen reduction activity and stability.
Owner:ZHEJIANG UNIV OF TECH
Method for preparing graphene/platinum nano counter electrode material for dye sensitized solar cell
InactiveCN102324319ALow costEquivalent Energy Conversion EfficiencyMaterial nanotechnologyLight-sensitive devicesElectrical batterySolar battery
The invention belongs to the technical field of dye sensitized solar cells, in particular to a method for preparing a graphene / platinum nano counter electrode material for a dye sensitized solar cell. The method comprises the following steps of: soaking a conducting substrate on which a polyelectrolyte is adsorbed in a graphene suspension, a polyelectrolyte solution and a chloroplatinic acid solution in sequence in an electrostatic self-assembly way to form a self-assembly ultrathin film with a polyelectrolyte / graphene / polyelectrolyte / chloroplatinic acid structure on the surface of the conducting substrate under the action of electrostatic attraction; and sintering and transforming into a 'graphene / platinum nanoparticle' ultrathin film. The film can be taken as a counter electrode material for the dye sensitized solar cell. The preparation method has a simple process, the prepared counter electrode has extremely low platinum load amount, the cost of the counter electrode and the dye sensitized solar cell is greatly lowered, and the method can be applied to large-scale production of assembly line operation.
Owner:FUDAN UNIV
Platinum/alumina catalyst as well as preparation method and application thereof
ActiveCN107626329ALow Platinum LoadingLow priceCatalyst activation/preparationPreparation by reductive alkylationPlatinumMethyl isobutyl ketone
The invention discloses a platinum / alumina catalyst. The platinum / alumina catalyst is prepared from components in percentage by mass as follows: 0.05%-1.0% of platinum, 0.1%-2.0% of iron, 0.5%-5.0% ofgermanium dioxide and 92.0%-99.35% of alumina. The invention also discloses a preparation method of the platinum / alumina catalyst and an application of the platinum / alumina catalyst in synthesis of an anti-aging agent 4020 from the platinum / alumina catalyst, N-phenyl p-phenylenediamine and methyl isobutyl ketone in a fixed bed reactor. Compared with the prior art, the platinum / alumina catalyst has mild application conditions, high activity, high selectivity, long service life and relatively low price, is simple to produce and easy to industrialize and has bright application prospects and enormous economic benefits.
Owner:SHANGHAI XUNKAI NEW MATERIAL TECH
Gas Diffusion Electrodes, Membrane-Electrode Assemblies and Method for the Production Thereof
InactiveUS20080254342A1Low platinum loadingImprove performanceCell electrodesFinal product manufactureDiffusionIon beam
Owner:BASF FUEL CELL
Gas diffusion electrodes, membrane-electrode assemblies and method for the production thereof
ActiveUS7601216B2Low platinum loadingImprove performanceFinal product manufactureElectrode carriers/collectorsIonomerGaseous diffusion
A method for forming a patterned noble metal coating on a gas diffusion medium substantially free of ionomeric components comprising subjecting an electrically conductive web with a patterned mask overlaid thereto to a first ion beam having an energy not higher than 500 eV, and to a second beam having an energy of at least 500 eV, containing the ions of at least one noble metal and a gas diffusion electrode.
Owner:BASF FUEL CELL
Fuel cell anode catalyst, preparation method thereof and proton exchange membrane fuel cell
ActiveCN109921044AImprove transfer rateUniform sizeMaterial nanotechnologyCell electrodesChemistryCarbon monoxide poisoning
The invention relates to the technical field of fuel cell catalysts, and specifically provides a fuel cell anode catalyst, a preparation method thereof and a proton exchange membrane fuel cell. The fuel cell anode catalyst is at least one of molybdenum carbide@hollow carbon sphere and platinum&molybdenum carbide@hollow carbon sphere, wherein the molybdenum carbide@hollow carbon sphere represents that the surface of the hollow carbon sphere is loaded with molybdenum carbide nanoparticles; and the platinum&molybdenum carbide@hollow carbon sphere represents that the surface of the hollow carbon sphere is loaded with molybdenum carbide nanoparticles and platinum nanoparticles at the same time. The anode catalyst is capable of improving the catalytic activity, carbon monoxide poisoning resistance and catalytic stability while reducing the loading amount of the platinum, and is beneficial for promoting the large-scale commercial application of the proton exchange membrane fuel cell.
Owner:SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
Preparation method for carbon supported ultra-low platinum catalytic electrode by indirect galvanic deposit
InactiveCN100588018CGood dispersionGood size controlCell electrodesFuel cell detailsPlatinum saltsPorous carbon
The invention provides a method for preparing a carbon-supported ultra-low platinum catalytic electrode by means of indirect electrodeposition, which belongs to the fuel cell technique field. The method comprises the steps: transition metal M (such as: Cu, Co, Ni and the like) nano-particles in an aqueous solution are highly dispersed and deposited on a porous carbon electrode (PCE) bonded with perfluoro-sulfonated resin through a four-step electrodeposition method, then the obtained M / PCE electrode is immerged into a platinum salt solution for preparing the carbon-supported ultra-low platinumcatalytic electrode through displacement reaction. The invention has the advantages of simple process and low costs. The prepared carbon-supported ultra-low platinum catalytic electrode has the advantages of low platinum loading, high electro-catalytic performance, good dispersion of platinum nano-particles and controllable sizes, and can replace the existing commercial platinum carbon (Pt / C) catalyst.
Owner:CHONGQING UNIV
Low-load Pt/C catalyst hydrogen diffusion anode and preparation method and application thereof
ActiveCN113604843ALarge pore volumeHigh catalytic activityPhotography auxillary processesProcess efficiency improvementPtru catalystMaterials science
The invention relates to a low-load Pt / C catalyst hydrogen diffusion anode and a preparation method and application thereof. The preparation method comprises the steps that nano carbon is used as a carrier, alkali is used for etching the carbon carrier, then sodium gluconate is used as a complexing agent, chloroplatinic acid is used as a platinum source, and a dipping-thermal reduction method is used for preparing a catalyst. The catalyst carrier has high micropore capacity and is beneficial to dispersion of platinum catalyst particles, so that the catalyst still has high catalytic activity under low platinum loading capacity, and the cost of the platinum catalyst can be obviously reduced. When the catalyst is used for preparing a hydrogen diffusion anode and the electrode is used for zinc electrodeposition, the hydrogen diffusion anode has the characteristics of low cell voltage and low unit consumption of electric energy, and compared with an existing metal anode zinc electrodeposition method, the unit consumption of the electric energy of zinc can be reduced by 60.1%. Compared with an existing gas diffusion electrode zinc electrodeposition technology, under the condition that the platinum loading capacity of the catalyst is reduced, the cell voltage is reduced by 0.31 V, and the unit consumption of the electric energy is also reduced by 70.64 kW * h / t.
Owner:BEIJING UNIV OF CHEM TECH
A kind of preparation method of platinum-cobalt alloy catalyst
ActiveCN111755707BSolve safety and environmental issuesGuaranteed synchronous restoreCell electrodesNanotechnologyPtru catalystAlloy catalyst
The invention belongs to the technical field of new energy materials and applications, and in particular relates to a method for preparing a platinum-cobalt alloy catalyst. The preparation method of the platinum-cobalt alloy catalyst of the invention comprises the following steps: preparation of a catalyst precursor, high-temperature reduction of the precursor, high-temperature alloying of the catalyst, pickling of the catalyst and water washing of the catalyst. The present invention uses pure water as a solvent, which has safety and environmental protection issues; when the precursor is reduced at high temperature, the reducing agent is the carbon in platinum carbon, and no additional reducing agent is needed, which avoids the use of sodium borohydride or hydrazine hydrate, etc. Safety and environmental protection problems caused by toxic reagents; Gel is used as the precursor of platinum-cobalt alloy to prepare platinum-cobalt alloy oxygen reduction catalyst, which ensures the simultaneous reduction of platinum and cobalt; no sodium salt and chloride ions are added, which reduces the difficulty of product post-processing The present invention uses ammonia water to adjust the pH value of the system, and the post-treatment steps are simple; the transition metal cobalt is added to the platinum-carbon catalyst, which reduces the platinum loading of the catalyst while improving the performance of the catalyst.
Owner:WUXI WEIFU HIGH TECH CO LTD
Platinum catalyst and preparation method and application thereof
PendingCN114433075ALow Platinum LoadingEasy to operateDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsPtru catalystReduction treatment
The invention discloses a platinum catalyst and a preparation method and application thereof. The platinum catalyst comprises platinum nanoparticles and a carrier, the platinum nanoparticles are uniformly loaded on the surface of the carrier, and the platinum loading capacity on the platinum catalyst is lower than 1.0 wt.%. The preparation method of the platinum catalyst comprises the following steps: dipping a carrier in a platinum precursor solution, carrying out ultrasonic treatment, removing a solvent, and carrying out reduction treatment in a protective atmosphere to obtain the platinum catalyst. The catalyst is low in precious metal platinum content, good in dispersity, capable of providing higher catalytic activity and better catalytic stability, easy to prepare, low in cost, low in energy consumption, free of pollution, short in time and wide in application prospect.
Owner:INST OF CHEM ENG GUANGDONG ACAD OF SCI
A kind of platinum/alumina catalyst and its preparation method and application
ActiveCN107626329BLow platinum loadingLow priceCatalyst activation/preparationPreparation by reductive alkylationPlatinumPtru catalyst
The invention discloses a platinum / alumina catalyst. The components of the platinum / alumina catalyst include, by mass percentage, 0.05-1.0% platinum, 0.1-2.0% iron, and 0.5-5.0% germanium dioxide. And 99.35‑92.0% alumina. The invention also discloses a preparation method of the platinum / alumina catalyst, and application of the platinum / alumina catalyst with N-phenyl-p-phenylenediamine and methyl isobutyl ketone in a fixed bed reactor to synthesize an antioxidant 4020. . Compared with the prior art, the platinum / alumina catalyst of the present invention has mild application conditions, high activity, high selectivity, long life, relatively cheap price, simple production process, easy industrialization, good application prospects and huge economic benefits. .
Owner:SHANGHAI XUNKAI NEW MATERIAL TECH
Method for preparing graphene/platinum nano counter electrode material for dye sensitized solar cell
InactiveCN102324319BLow costEquivalent Energy Conversion EfficiencyMaterial nanotechnologyLight-sensitive devicesElectrical batterySolar battery
Owner:FUDAN UNIV
Catalyst layer
A catalyst layer including: (i) a platinum-containing electrocatalyst; (ii) an oxygen evolution reaction electrocatalyst; (iii) one or more carbonaceous materials selected from the group consisting of graphite, nanofibres, nanotubes, nanographene platelets and low surface area, heat-treated carbon blacks wherein the one or more carbonaceous materials do not support the platinum-containing electrocatalyst; and (iv) a proton-conducting polymer and its use in an electrochemical device are disclosed.
Owner:JOHNSON MATTHEY HYDROGEN TECH LTD
Method for preparing Nano platinum carried catalysis electrode in Nano crystal sensitized solar battery
InactiveCN100365830CLow platinum loadingReduce manufacturing costLight-sensitive devicesCell electrodesPlatinumManufacturing technology
Using self-assembly technique loads Nano granules of platinum in hydrosol of compositive Nano platinum to surface of conducting substrate of containing mercaptan functional group after modification of L-B membrane or silanization so as to realize even, tight and discontinuous distribution of Nano granules of platinum on surface of conducting substrate. Using high sintering or vacuum treatment in low temperature forms Nano platinum carried catalysis electrode in high chemical activity. Electrode produced in the invention possesses very low platinum load so as to lower cost for preparing solar battery. The invention is applicable to preparation of flexible electrode, especially suitable to electrode pair in Nano crystal sensitized solar battery.
Owner:INST OF CHEM CHINESE ACAD OF SCI
PT-M Metal Alloy Catalyst Prepared by Electrodeposition in Organic System
ActiveCN110021758BLow costImprove utilization efficiencyMaterial nanotechnologyFuel and secondary cellsPtru catalystOrganosolv
The invention discloses a Pt-M metal alloy catalyst prepared by electrodeposition in an organic system; the conductive carrier of the catalyst is carbon-based; and the Pt-M metal alloy prepared by co-deposition of Pt-M metal in an organic solvent Alloy nanoparticles are uniformly dispersed on the surface of the carrier in the form of physical loading. During the preparation process, the Pt source precursor and the M source precursor are dissolved in an organic solvent, and the volume molar concentration of the metal precursor in the mixed solution is 1-20 mmol / L. In addition, the oxygen in the solution is excluded under the protection of an inert atmosphere, subsequent deposition is performed at different deposition potentials, and cyclic voltammetry electrochemical cleaning is performed. Through the scheme of the present invention, the further reduction of the platinum loading and the enhancement of the catalytic activity of the prepared Pt-M metal alloy nanoparticle catalyst can be achieved, the comprehensive utilization efficiency of precious metals is greatly improved, and the oxygen reduction activity is improved, reducing the Targets such as comprehensive cost of noble metal catalysts.
Owner:SHANGHAI JIAO TONG UNIV
A method for surface alloy modification of nanoporous gold
InactiveCN103409780BEliminate the effects of slow diffusionAdjust deposition morphologyCellsCell electrodesHigh activityPulse cycle
The invention relates to a method for carrying out surface alloy modification upon nano-grade porous gold. According to the method, an alloy material is deposited on the surface of nano-grade porous gold with a pulse potential method. The method has the steps that: the nano-grade porous gold is connected on an electrode, and is placed in a solution with different metal ions; pulse potential is applied, wherein the pulse skips between a high potential and a low potential; the high potential is fixed at a value with which the different metal ions are not reduced, and the low potential is fixed at a value with which the metal ions in the solution can be reduced; the two potentials form a pulse cycle; and through multiple times of cycles, the alloy modification upon the nano-grade porous gold is completed. With the method, the nano-grade porous gold is subjected to alloy modification. The prepared nano-grade porous gold based catalyst has low platinum load, high activity, high intoxication resistance, and high corrosion resistance.
Owner:SHANDONG UNIV
Method for preparing proton exchange membrane fuel cell electrode with high catalyst utilization ratio
The invention provides a method for preparing a proton exchange membrane fuel cell electrode with high catalyst utilization ratio, which comprises the following steps: firstly, constructing a gas porous electrode having a complete electron channel, a gas channel and a proton channel; secondly, exchanging platinum cations onto perfluorosulfonic acid resin of the gas porous electrode by an ion exchange method; thirdly, reducing the platinum cations onto a carbon carrier contacted with the perfluorosulfonic acid resin by an electrochemical reduction method, thus, the proton exchange membrane fuel cell electrode with high catalyst utilization ratio is prepared. The invention has the advantages of simple process and low cost. The proton exchange membrane fuel cell electrode with high catalyst utilization ratio prepared by using the invention has the advantages of high catalyst utilization ratio, low platinum capacity, good dispersion of platinum nano-particles, controllable size, and the like, and can replace the prior commercial platinum / carbon (Pt / C) catalyst.
Owner:CHONGQING UNIV
Preparation method of high-efficiency low-platinum catalyst for direct methanol fuel cell
InactiveCN102806093BImprove corrosion resistanceEnhancing the Catalytic Activity of Methanol OxidationCell electrodesCatalyst activation/preparationPtru catalystFuel cells
The invention provides a method for preparing a high-efficiency and low-platinum direct methanol fuel cell catalyst, which belongs to the technical field of fuel cells. The present invention first adopts the method of pulse electrodeposition to deposit a layer of nanoscale Ni-P amorphous alloy on the titanium substrate, which has strong corrosion resistance and has a certain auxiliary catalytic effect on methanol oxidation, as a "core / shell" The "core" of the catalyst; then, through the chemical replacement reaction, a completely replaced platinum monoatomic layer is formed on the surface of the Ni-P amorphous alloy, thereby constructing a "core / shell"-like low-carbon catalyst with a synergistic catalytic effect on methanol oxidation. Platinum fuel cell catalyst. The method of the invention is simple and easy, and the production cost is low. The catalyst prepared by the invention can effectively reduce the amount of precious metals and improve the utilization rate of the catalyst, and can replace the existing commercial platinum carbon (Pt / C) catalyst, and is widely used in electric vehicles, various spacecraft, portable electronic equipment, Such as video cameras, notebook computers, electric toys, etc.
Owner:CHONGQING UNIV
Method for preparing platinum catalyst by electrodeposition
InactiveCN101259410BSmall grainLow costCell electrodesMetal/metal-oxides/metal-hydroxide catalystsPt elementPlatinum catalyst
The invention relates to a preparation of a platinum catalyst of a direct methanol fuel cell, which adopts a method of electrodepositing and carries out pulse electrodepositing on platinum by two steps, namely a larger current is adopted for forming a crystal nucleus in step I; a small current is adopted for the growing the crystal nucleus in step II; the grain diameter of the prepared catalyst can be reduced through changing the applied electric signal; thereby leading the formed platinum grains to be more dispersive and have a higher covering rate and a larger specific surface; thereby reducing the platinum loading capacity of unit area of the electrodes, improving utilization rate and activity and simultaneously reducing the cost of the catalyst. The method is simple and controllable to be applied. The prepared platinum catalyst can not only be applied to the direct methanol fuel cell, but also can be applied to other fuel cells as catalysts. Besides, the method can be expanded andapplied to platinum-ruthenium codeposition and other multi-metal codeposition.
Owner:UNIV OF SCI & TECH BEIJING
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