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127results about How to "High catalytic activity for oxygen reduction" patented technology
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Catalyst with dispersed single platinum atoms and preparation method of catalyst
The invention relates to a catalyst with dispersed single platinum atoms and a preparation method of the catalyst, and aims at solving the technical problems that a precious metal oxygen reduction catalyst is high in preparation cost and low in utilization rate of platinum in the prior art. The catalyst with dispersed single platinum atoms is prepared by stirring, refluxing, evaporating, drying and grinding a carbon support, a nonmetal heteroatom reagent and a platinum compound as raw materials, and carrying out high-temperature treatment and interaction in a sliding rail furnace. A test result shows that the platinum element in the catalyst exists in a form of single atoms platinum; the catalytic activity is high; in acid and alkaline systems, the initial oxygen reduction potential and the half-wave potential are equivalent to those of a commercial carbon-supported platinum catalyst with the platinum content of 20%; other metal impurities are not introduced in the preparation process; and the stability is relatively good. The preparation method of the catalyst provided by the invention is relatively low in cost, simple and feasible. The catalyst is suitable for preparation of a fuel cell; the utilization rate of the platinum is greatly improved; the cost of the catalyst is reduced; and the commercialization process of the fuel cell can be promoted.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Lignin-based transition metal/nitrogen doped carbon material, and preparation and application thereof
ActiveCN109012590AExtensive sources of raw materialsLow priceGas treatmentOther chemical processesBiomassChemistry
The invention discloses a lignin-based transition metal / nitrogen doped carbon material, and preparation and application thereof, belonging to the technical field of carbon materials. A preparation method comprises the following steps: (1) uniformly mixing a transition metal salt with lignin in water to obtain a lignin / transition metal salt mixed liquid; (2) subjecting the lignin / transition metal salt mixed liquid to hydrothermal pre-carbonization so as to obtain a hydrothermal pre-carbonization product; and (3) mixing the hydrothermal pre-carbonization product with a nitrogen source, carryingout high-temperature carbonization in a protective atmosphere, and carrying out subsequent treatment so as to obtain the lignin-based transition metal / nitrogen doped carbon material. The lignin-basedtransition metal / nitrogen doped carbon material of the invention has excellent electrochemical performance; and the preparation process of the material is simple, raw materials are widely available and cheap, and an effective way is provided for the high-value utilization of biomass. The carbon material of the invention is applied to fields of fuel cells, supercapacitors, adsorbent materials, and / or water electrolysis.
Owner:SOUTH CHINA UNIV OF TECH
Cathode material for solid-oxide fuel cell and method for preparing the same
InactiveCN101359739AExtended service lifeImprove stabilityCell electrodesFuel cell detailsCeramic compositeDip-coating
The invention relates to a solid oxide fuel battery cathode material and a preparation method thereof. The chemical formula of the material is MxA(1-x)M`yB(1-y)O(3-Delta). The material is prepared by adopting an EDTA-citrate combination and complexation method or a glycine combustion method. The cathode material can be smeared onto the electrolyte surface by screen printing, spraying, dip coating or flow casting, and then calcined at high temperatures to obtain a cathode catalyst layer. The catalyst layer is in the working state, that is, the negative current passes through the electrode, so that the precious metal oxides can obtain electrons to take the reduction reaction, emerge out of the lattice of the perovskite or perovskite-like ceramic material to enrich on the surface of the material and to form the precious metal-ceramic composite cathode. The precious metals can be re-oxidized and enter the ceramic oxide lattice when the positive current passes through the electrode.
Owner:NANJING UNIV OF TECH
Method for preparing proton-exchange membrane fuel cell oxygen reduction catalyst based on PtNi (111) octahedral single crystal nanoparticles
InactiveCN104998658AHigh catalytic activity for oxygen reductionPt content decreasedCell electrodesMetal/metal-oxides/metal-hydroxide catalystsN dimethylformamideSingle crystal
Owner:昆明贵研催化剂有限责任公司
Nitrogen-doped graphene-iron-based nanoparticle composite catalyst and preparation method thereof
ActiveCN105170169AReduce reunionPromote generationPhysical/chemical process catalystsCell electrodesIron saltsFreeze-drying
The present invention relates to a nitrogen-doped graphene-iron-based nanoparticle composite catalyst and a preparation method thereof, wherein the catalyst is a complex of nitrogen-doped graphene and iron-based nanoparticles (including metal iron and iron nitride). The main preparation process comprises: carrying out a reaction of a graphene oxide aqueous solution and a reducing agent (hydrazine hydrate or sodium borohydride) for 1 h under an oil bath to obtain reduced graphene oxide; mixing the reduced graphene oxide aqueous solution and an iron salt, completely stirring, and carrying out freezing drying to obtain a reduced graphene oxide-iron salt aerogel precursor; and carrying out a high temperature heat treatment under a mixed atmosphere of ammonia gas and an inert gas to obtain the nitrogen-doped graphene and iron-based nanoparticle complex. Compared with the commercial platinum-carbon catalyst, the composite non-precious metal catalyst of the present invention has advantages of simple preparation process, low cost, high oxygen reduction catalysis activity, good methanol tolerance and the like, and can be used for fuel cells, lithium-air batteries and other oxygen reduction catalysis reaction systems.
Owner:TSINGHUA UNIV
Electrocatalysts having gold monolayers on platinum nanoparticle cores, and uses thereof
InactiveCN101379639AGuaranteed efficacyReduce loadMaterial nanotechnologyCell electrodesPlatinumFuel cells
Owner:BROOKHAVEN SCI ASSOCS
Nitrogen-doped carbon-supported non-noble metal (M-N-C) oxygen reduction catalyst and preparation method thereof
InactiveCN105170168AImprove stabilityExcellent resistance to methanolPhysical/chemical process catalystsCell electrodesUltrasonic dispersionPyrrole
The invention discloses an M-N-C oxygen reduction catalyst and a preparation method thereof, wherein the raw materials of the catalyst comprise a copolymer (P(TPT+Py)) of tripyrrole-[1,3,5]-triazine (TPT) and pyrrole (Py) and a non-noble metal salt. The preparation method comprises: (1) using a Friedel-Crafts reaction to synthesize a copolymer (P(TPT+Py)) of tripyrrole-[1,3,5]-triazine (TPT) and pyrrole (Py); (2) adding (P(TPT+Py)) and a non-noble metal salt to ethanol, placing into an ultrasonic dispersion device, carrying out an ultrasonic treatment to make the whole system be uniformly dispersed, evaporating the ethanol, placing into a vacuum oven, and drying for 4 h at a temperature of 80 DEG C; (3) carrying out a first heat treatment to obtain a nitrogen-doped carbon material; (4) completely washing the obtained nitrogen-doped carbon material with a diluted acid; and (5) carrying out a second heat treatment so as to obtain the M-N-C oxygen reduction catalyst.
Owner:XIANGTAN UNIV
Preparation method and application of nitrogen and iron modified carbon material
InactiveCN103252250AImprove catalytic performanceHigh catalytic activity for oxygen reductionPhysical/chemical process catalystsCell electrodesPtru catalystModified carbon
The invention provides a nitrogen and iron modified carbon material, belonging to the technical field of composite materials. The material takes melamine and FeCl3 as modifiers, and active ingredients such as N, Fe and the like are doped in carbon powder / a carbon nano tube, so that the catalytic action of the carbon material on oxygen reduction reaction is effectively improved, and the carbon material has good catalytic activity. Therefore, the carbon material can be applied to oxygen reduction catalytic reaction of fuel cells as a catalyst material. Through experimental determination, the cathode electrodes of the fuel cells prepared from the material show better oxygen reduction properties than traditional commercial XC-72 carbon powder electrodes, and the oxygen reduction catalytic activity is obviously improved. The material is simple in preparation process, is environment-friendly and is a non-noble metal oxygen reduction catalyst with potential application.
Owner:NORTHWEST NORMAL UNIVERSITY
Catalyst for VIII group single atomic dispersion and preparation method thereof
ActiveCN108242549AEvenly dispersedSimple manufacturing methodCell electrodesCatalyst activation/preparationCarbon layerMetal-organic framework
The invention relates to a catalyst for VIII group single atomic dispersion and a preparation method thereof. The catalyst is a nonmetal heteroatom doped carbon carrier formed by carrying out coordination on VIII group atoms and Zn atoms as well as organic ligands to form a metal organic framework, then carrying out high temperature pyrolysis reaction in presence of inert gas and carrying out coordination with organic ligands, wherein the VIII groups atoms interact with the nonmetal heteroatoms, are coated in a carbon layer and exist in a single atom form. According to the invention, the metalorganic framework is taken as a precursor, the required catalyst can be prepared by adopting a high temperature pyrolysis method only, and the preparation method is simple and practicable and is a universal method for synthesizing single atoms. The provided catalyst for the VIII group single atomic dispersion has good thermal stability and shows good catalytic activity in catalysis of oxygen reduction of a cathode of a fuel cell.
Owner:UNIV OF SCI & TECH OF CHINA
Preparation of nitrogen-doped orderly-graded mesoporous carbon catalyst as well as carbon catalyst and application of carbon catalyst
ActiveCN106861740AHigh active specific surfaceEnhanced mass transferPhysical/chemical process catalystsCell electrodesEtchingOxygen
The invention discloses a preparation method of a nitrogen-doped orderly-graded mesoporous carbon catalyst and application of the nitrogen-doped orderly-graded mesoporous carbon catalyst to proton exchange membrane fuel cells. The catalyst is prepared though a binary mixing template method; a triblock copolymer is used as a soft template agent and one or more of a Y-type molecular sieve, an MCM-41 molecular sieve and a ZSM-5 molecular sieve are used as a hard template agent; soluble resin is used as a carbon source; in a preparation process, a transition metal salt is added and a transition metal element is introduced in situ; meanwhile, a nitrogen element is introduced through roasting in an ammonia atmosphere. The nitrogen-doped orderly-graded mesoporous carbon material provided by the invention has an ordered mesoporous structure (with the size of 3nm to 5nm) generated by soft template induction and a three-dimensional through mesoporous structure (with the size of 10nm to 50nm) generated by hard template etching, has a high-activity specific surface and good mass-transferring performance and has excellent oxygen reduction catalysis performance and good electrochemical stability. By adopting the carbon material provided by the invention, application of the binary mixing template method to preparation of an oxygen reduction carbon-based catalyst is realized for the first time; meanwhile, the carbon material has the advantages of good process repeatability, low cost, good environmental friendliness and the like.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Method for preparing nitrogen self-doped three-dimensional graphene from peels
The invention relates to a method for preparing nitrogen self-doped three-dimensional graphene from peels. With peels as a carbon source and a nitrogen source, the method comprises the following steps: performing hydrothermal carbonization; performing activation treatment using an activator; and performing acid washing and drying to obtain the nitrogen self-doped three-dimensional graphene. In the invention, since the peels are selected as a raw material for preparing the nitrogen self-doped three-dimensional graphene, the needs for sustainable development and environmental protection can be met, and the raw material cost is effectively reduced. The specific surface area of the prepared product exceeds 1700m<2>g<-1>; the relatively large specific surface area and three-dimensional graphene porous structure are beneficial to the transfer and transport of ions in the electrolyte; and the electrical conductivity is very good. Due to the doping of nitrogen element, active sites for catalysis and lithium storage reactions can be formed, and the nitrogen self-doped three-dimensional graphene can be widely applied to the fields of energy storage and transformation such as fuel cells and lithium ion batteries. Moreover, the graphene material has excellent electrical conductivity, and the carbon material has relatively high activity due to the doping of nitrogen element.
Owner:WUHAN UNIV OF TECH
Electrocatalyst of negative electrode of fuel cell as well as preparation method and application thereof
ActiveCN103682380AGood catalytic activity and stabilityLow costPhysical/chemical process catalystsCell electrodesPyrolysisConductive polymer
The invention relates to an electrocatalyst of a negative electrode of a fuel cell as well as a preparation method and application of the electrocatalyst. The catalyst adopts a conductive polymer as a reaction precursor, the conductive polymer is polymerized under the acid and oxidation condition to obtain polyaniline, the polyaniline is additionally provided with transition metal salt, and a phosphorus compound and / or a boron compound as a precursor, and the mixture is dried and is subjected to pyrolysis at the high temperature to obtain the electrocatalyst. The catalyst is N, phosphorus and / or boron co-doped nanometer carbon with a porous nanometer structure; the total mass percent of the doped heteroatom is 0.2 to 15 percent, the mass ratio of N to phosphorus and / or boron is 5:1 to 100:1, the weight percentage of metal is 0.1 to 10 percent, and the mass percent of the nanometer carbon is 75.0 to 99.7 percent.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Heteroatom-doped graphene material with hole in surface and preparation and application thereof, as well as device
ActiveCN105032461ASimple structureEasy to operatePhysical/chemical process catalystsCell electrodesDoped grapheneOxygen
The invention belongs to the field of electrochemistry, and discloses a heteroatom-doped graphene material with a hole in the surface and preparation and application thereof, as well as a device. The method comprises the following steps: adding concentrated HNO3 into a graphene oxide aqueous solution, sealing, performing ultrasonic reaction, stewing, pouring into deionized water, and performing centrifugation, filtering and drying to obtain graphene oxide with the hole in the surface; then putting the graphene oxide with the hole in the surface into a plasma high-temperature tubular reactor, vacucumizing, feeding protective gas and a heteroatom-doped source compound, heating, turning on a radio frequency power supply, performing plasma discharging for 10-60 minutes, turning off radio frequency and a heating power supply to stop feeding the heteroatom-doped source compound, and cooling to obtain the heteroatom-doped graphene material with the hole in the surface. The prepared material is higher in oxygen reduction catalysis activity and better in poisoning resistance effect and can be applied to the field of anode materials of a proton exchange membrane fuel battery, a direct alcohol type fuel battery and a metal-air battery.
Owner:SOUTH CHINA UNIV OF TECH
Preparation method of supported platinum-based alloy catalyst for low temperature fuel cell
InactiveCN109935847ALarge electrochemical active areaImprove electrochemical activityMaterial nanotechnologyCell electrodesHydrazine compoundUnit mass
The invention provides a preparation method of a supported platinum-based alloy catalyst. The catalyst can be used as a low temperature fuel cell catalyst. The preparation method comprises the steps of taking ethylene glycol as a solvent and stabilizer, dispersing a carrier in the solvent, and reducing platinum and non-platinum precursors by strong reducing agents such as borohydride, hydrazine hydrate and tetrabutyl borohydride to obtain supported platinum-based alloy nanoparticles. The preparation method adopted by the invention is simple, effective and free of a problem of difficult removalof the stabilizer. The prepared alloy catalyst has a small particle size and uniform particle size distribution, and has good dispersion on the carrier at the same time. In addition, the catalyst canshow high area specific activity and unit mass Pt specific activity for oxygen reduction reaction, can effectively reduce the platinum consumption and has potential application prospects in the low temperature fuel cell.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Phosphorus-doped graphene oxygen reduction electro-catalyst and preparation method and application thereof
InactiveCN103495430AIncrease contentEvenly distributedPhysical/chemical process catalystsCell electrodesCarbon monoxide poisonElectrochemical biosensor
The invention relates to a catalyst, in particular to phosphorus-doped graphene oxygen reduction electro-catalyst and a preparation method and application thereof. The phosphorus-doped graphene oxygen reduction electro-catalyst contains oxidized graphene substrate and active phosphorus doped or attached to the surface and inside of the oxidized graphene substrate. The preparation method includes the steps of 1, preparing the oxidized graphene; 2, mixing the oxidized graphene with phosphorus-bearing precursor; 3, drying; 4, performing pyrolysis. The phosphorus-doped graphene oxygen reduction electro-catalyst is good oxygen reduction electro-catalyst, is high in catalytic activity and resistant to methanol poisoning and carbon monoxide poisoning, good in stability and capable of serving as electro-catalyst for fuel cells and metal-air cells and serving as electrode active material for electrochemical energy storage and conversion devices such as lithium ion cells, sodium ion cells, lithium-sulfur cells and supercapacitors, and is also applicable to the fields such as electrochemistry / biosensors.
Owner:CHINA WEST NORMAL UNIVERSITY
Ag / C catalytic agent used for zinc air battery and preparation method thereof
InactiveCN103151538AHigh catalytic activity for oxygen reductionImprove stabilityCell electrodesMetal/metal-oxides/metal-hydroxide catalystsPtru catalystElectrical battery
The invention relates to an Ag / C catalytic agent used for a zinc air battery and a preparation method thereof. The Ag / C catalytic agent used for the zinc air battery is made of silver salt and uses polyvinyl pyrrolidone (PVP) as a protective agent. The Ag / C catalytic agent used for the zinc air battery is prepared by deoxidation of the silver salt using NaBH4 as a reducing agent. The mass ratio of the protection agent to the silver salt is 0.1:1-15:1 in a process of preparing the catalytic agent. The mass ratio of the Ag to C in the catalytic agent is 98:2-40:60. When the method is adopted to prepare the Ag / C catalytic agent, process is simple, mass production is available, materials which can pollute the environment are not used in the preparing process, and the environment is protected. The Ag / C catalytic agent prepared with the method is used in the zinc air battery, and performance is excellent.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Carbon gel catalyst, its preparation and its application
ActiveCN102476058AIncrease nitrogen dopingIncrease the active sitePhysical/chemical process catalystsCell electrodesReduction ActivityMonomer
The invention discloses a metal-doped nitrogen-containing carbon gel catalyst used for proton exchange membrane fuel cell cathode and its preparation method, a nitrogenous aromatic compound and aldehyde are taken as a reaction precursor, a reaction monomer is subjected to an addition reaction and a condensation polymerization through base catalysis, and a metallic element is simultaneously added to prepare a metal-doped hydrogel, the metal-doped hydrogel is subjected to processes of drying, pyrolysis and secondary nitridation to obtain the metal-doped nitrogen-containing carbon gel nano charcoal material. When the catalyst of the present invention is used as the anode catalyst of the proton exchange membrane fuel cell, the catalyst indicates excellent reduction activity, the catalyst has the advantages of environmental protection, low cost, microscopic control and abundant resource, and is expected to be an electrocatalyst of the proton exchange membrane fuel cell.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Non-noble metal-nitrogen-carbon oxygen reduction catalyst and preparation method thereof
InactiveCN105047953AImprove stabilityExcellent resistance to methanolCell electrodesUltrasonic dispersionVacuum drying
The invention discloses an M-N-C oxygen reduction catalyst and a preparation method thereof. The catalyst comprises the following raw materials: a polymer P(TPT) of tripyrrole-[1,3,5]-triazine (TPT) and a non-noble metal salt; and the preparation method comprises the following steps: (1) synthesizing the polymer P(TPT) of tripyrrole-[1,3,5]-triazine (TPT) through a Friedel-Crafts reaction; (2) adding the P(TPT) and the non-noble metal salt to ethanol, putting the mixture in an ultrasonic dispersion instrument and carrying out ultrasonic treatment to make the whole system uniform in dispersion, evaporating the ethanol to dryness, and drying in a vacuum drying oven at 80 DEG C for 4 hours; (3) carrying out first heat treatment to obtain a nitrogen-doped carbon material; (4) fully washing the obtained nitrogen-doped carbon material with dilute acid; and (5) carrying out second heat treatment, so as to obtain the M-N-C oxygen reduction catalyst.
Owner:XIANGTAN UNIV
Preparation method and application of nitrogen-doped porous carbon-coated cobalt nanoparticle composite material
ActiveCN110034306AIncrease profitImprove oxygen reduction performanceMaterial nanotechnologyCell electrodesPorous carbonSolvent
The invention provides a preparation method and application of a nitrogen-doped porous carbon-coated cobalt nanoparticle composite material. The preparation method comprises the following steps: uniformly dispersing a carbon source precursor, a nitrogen source precursor and soluble salt of transition metal ions in a solvent according to a ratio, then performing drying to obtain a solid powder precursor, and calcining the solid powder precursor in a protective atmosphere to obtain black powder, namely the composite material. The composite material has efficient oxygen reduction catalysis performances and can be applied to proton exchange membrane fuel cells, alkaline fuel cells and metal-air batteries. The catalyst has the advantages that a pore structure is generated in the heat treatmentprocess and is uniformly dispersed; the carbon source, the nitrogen source and the metal source interact with one another to stabilize active elements and effectively improve the catalytic activity. Compared with a catalyst with commercial carbon as a carbon source, the prepared composite material has better oxygen reduction catalytic activity and is an efficient non-noble metal oxygen reduction catalyst.
Owner:SHANGHAI JIAO TONG UNIV +1
Catalyst for negative electrode material of hydrogen-air fuel battery and preparation method thereof
The invention discloses a catalyst for a negative electrode material of a hydrogen-air fuel battery and a preparation method thereof. In the invention, according to the catalyst, group VIII atoms anda Zn atom are coordinated together with an organic ligand to form a metal organic framework, then at least one additional group VIII atom is adsorbed by a double-solvent method, next a high-temperature pyrolysis reaction is performed in an inert gas atmosphere, the organic ligand is coordinated to form a non-metal heteroatom-doped carbon carrier, and the group VIII atoms and a non-metal heteroatomare interacted, are coated in a carbon layer and exist in a multi-atom form. Based on the metal organic framework as a precursor, the required catalyst can be prepared only by the high-temperature pyrolysis method. The preparation method is simple and feasible, and is a universal method for synthesis of multiple atoms. The group VIII multi-atom dispersed catalyst provided by the invention has good thermal stability and has excellent catalytic activity on oxygen reduction catalysis of a negative electrode of the hydrogen-air fuel battery.
Owner:UNIV OF SCI & TECH OF CHINA
Method for synthesizing nitrogen-carbon nonmetal reducing catalyst by utilizing concentrated sulfuric acid carbonization
InactiveCN103212430AEffectively fixedHigh catalytic activity for oxygen reductionPhysical/chemical process catalystsCell electrodesCarbon compositesPtru catalyst
The invention provides a method for synthesizing a nitrogen-carbon compound nonmetal reducing catalyst by utilizing concentrated sulfuric acid carbonization. The method utilizing an organic compound containing carbon, hydrogen and oxygen as a carbon source and utilizing melamine as a nitrogen source comprises the following steps of: preliminarily carbonizing the hydrogen and the oxygen in the organic compound containing the carbon, the hydrogen and the oxygen by utilizing dehydration characteristic of the concentrated sulfuric acid, so that the melamine enters a duct of the preliminary carbonizing product, and the nitrogen source is effectively fixed; carrying out high-temperature deep carbonization under the protection of the nitrogen gas to obtain a compound material which is effectively combined with the nitrogen and the carbon, so that the active nitrogen with the effect of promoting oxygen reduction catalysis has a good effect, and therefore, a nitrogen loss problem generated by the conventional high-temperature treatment method is avoided, and the oxygen reduction catalysis activity of the nitrogen-carbon composite material is effectively improved.
Owner:NORTHWEST NORMAL UNIVERSITY
High-catalytic activity composite negative electrode material of intermediate-temperature solid oxide fuel cell and preparation method of composite negative electrode material
InactiveCN105870459ASimple preparation processEasy to operateCell electrodesElectrical conductorOxygen ions
The invention relates to a high-catalytic activity composite negative electrode material of an intermediate-temperature solid oxide fuel cell and a preparation method of the composite negative electrode material, and belongs to the technical field of an energy material. The composite negative electrode comprises a perovskite structured oxide PrBa<1-x>Co<2>O<6-Delta>, Pr<1-y>BaCo<2>O<6-Delta> or Pr<1-n>Ba<1-m>Co<2>O<6-Delta> in the absence of A-position cation and an oxygen ion conductor material Sm<0.2>Ce<0.8>O<1.9> or Gd<0.1>Ce<0.9>O<1.95>, wherein the mass percent of the oxygen ion conductor material accounts for 20-50%. The preparation method of the composite negative electrode material comprises the following steps of firstly, respectively preparing synthesis solutions of two constituents; secondly, mixing and uniformly stirring the two solutions to obtain a mixed synthesis solution of the two constituents, and heating the mixed synthesis solution to obtain mixed precursor gel; and finally, carrying out high-temperature sintering reaction to obtain composite negative electrode powder. The composite negative electrode material is prepared by a synchronous sintering reaction method, the preparation method has the advantages of simplicity in process, short preparation period, low cost and high efficiency, and is easy to operate, and the oxygen reduction catalytic activity of the negative electrode of the intermediate-temperature solid oxide fuel cell is effectively improved.
Owner:DALIAN UNIV OF TECH
Preparation method of monodisperse platinum-series high-entropy alloy nanoparticle catalyst
ActiveCN111111693AHigh Pt utilizationEasy to prepareMetal/metal-oxides/metal-hydroxide catalystsPtru catalystHigh entropy alloys
The invention relates to the technical field of material chemistry, and particularly discloses a preparation method of a monodisperse platinum-series high-entropy alloy nanoparticle catalyst. The preparation method comprises the steps: preparing a silicon dioxide photonic crystal template, preparing a carbon precursor solution, and dissolving a platinum precursor and at least four other metal precursors in THF and CHCl3 to obtain a mixed solution; mixing a block copolymer F127, a carbon precursor solution and tetraethyl orthosilicate, respectively adding the mixture and a protonic acid solution into the mixed solution, and stirring to obtain a transparent solution; adding the transparent solution into the silicon dioxide photonic crystal template, drying, heating and curing to obtain a purple brown solid; calcining the purple brown solid to obtain a gray solid; and etching the gray solid by adopting strong base or strong acid, filtering and drying. The monodisperse platinum-series high-entropy alloy nanoparticle catalyst with the advantages of controllable particle size, good dispersity, excellent performance and the like is obtained by adopting the preparation method disclosed bythe invention.
Owner:CHONGQING UNIV
N-and-P double-doped carbon fiber-loaded CoP composite catalytic material as well as preparation method and application thereof
PendingCN112928287AImprove conductivityEasy to transportFuel and primary cellsCell electrodesCarbon fibersSpinning
The invention provides an N-and-P double-doped carbon fiber-loaded CoP composite catalytic material as well as a preparation method and application thereof, belonging to the field of aluminum air batteries. The preparation method comprises the following steps: mixing a ZIF-67 organic solution and a polyacrylonitrile organic solution to obtain a spinning precursor solution; performing electrostatic spinning on the spinning precursor solution to obtain a flexible film; pre-oxidizing the flexible film to obtain a pre-oxidized product; and mixing the pre-oxidized product with red phosphorus, and carrying out pyrolysis in a protective atmosphere to obtain the CoP@G / NP-PCNFs composite material. According to the invention, ZIF-67 particles have an atomic-level confinement dispersion effect on the Co element, and are combined with electrostatic spinning, and carbonization and phosphorization are carried out in a pyrolysis process, so the formed carbon fibers have relatively high conductivity; and the carbon spheres derived from the ZIF-67 particles wrap the CoP particles, so an ORR reaction can be promoted to conducted in a four-electron path, and battery efficiency is improved.
Owner:济南易航新材料科技有限公司
Alkaline fuel cell cathode carbon catalyst and preparation method thereof
InactiveCN103296292AEasy to operateIncrease productionCell electrodesOrganic-compounds/hydrides/coordination-complexes catalystsPtru catalystIron phthalocyanine
The invention discloses a high-performance alkaline fuel cell cathode carbon catalyst and a preparation method of the high-performance alkaline fuel cell cathode carbon catalyst. The catalyst disclosed by the invention is a composite carbon material in a core-shell nanostructure, which is prepared by adulterating two elements of Fe and N, using conductive carbon black with a high-ratio surface as an inner core and coating a phthalocyanine iron shell around the inner core. The preparation method comprises the following steps of: weighing and mixing phthalocyanine iron solid powder and the conductive carbon black with the high-ratio surface according to a certain mass ratio, and then preparing to obtain a C@FePc carbon non-noble metal catalyst in the core-shell nanostructure by adopting a simple mechanical ball milling method. The catalyst disclosed by the invention has high-performance oxygen reduction reaction (ORR) catalytic activity, excellent CH3OH / CO tolerance and good stability, the cost of raw materials used in the preparation process is low, the operation is simple and convenient, and the catalyst is easy for large-scale commercialized production.
Owner:WUHAN UNIV
Nitrogen-sulfur-iron triple-doped carbon black catalyst and preparation method and application thereof
InactiveCN106532073AHigh catalytic activity for oxygen reductionGood choiceCell electrodesCooking & bakingAir cathode
The invention discloses a nitrogen-sulfur-iron triple-doped carbon black catalyst and a preparation method and an application thereof. Nitrogen, sulfur and iron are jointly used for doping amorphous carbon black through high-temperature baking to form microsphere granules with Fe-N, Fe-S, Fe-C, C-S and C-N chemical bond coexistence, namely the nitrogen-sulfur-iron triple-doped carbon black catalyst. According to the nitrogen-sulfur-iron triple-doped carbon black microbial fuel cell cathode catalyst material prepared by the invention, the low-cost carbon black is used as the carbon source; the obtained composite material has high oxygen reduction catalysis activity, and high selectivity and stability; when the nitrogen-sulfur-iron triple-doped carbon black prepared by the invention is used as the air cathode microbial fuel cell cathode ORR catalyst, the maximum output power which is equivalent to that of 20wt% Pt / C is obtained; and when the nitrogen-sulfur-iron triple-doped carbon black is applied to the cathode, the unit area cost of an ACMFC cathode is reduced by 78.1%, so that a new choice is supplied for the air cathode microbial fuel cell cathode catalyst.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Catalyst prepared by in-situ growth of carbon nanotubes on ordered mesoporous carbon, and preparation method and application of catalyst
ActiveCN106876729AHigh active specific surfaceImprove conductivityCell electrodesCarbon nanotubeOxygen
The invention discloses a catalyst prepared by in-situ growth of carbon nanotubes on ordered mesoporous carbon, and a preparation method and an application of the catalyst. The composite catalyst is prepared by performing in-situ growth of carbon nanotubes on nitrogen-doped ordered mesoporous carbon; equivalently, a triblock copolymer is used as a soft template agent, and a soluble resin is used as a carbon source; transitional metal salt is added in the preparation process; a transitional metal element is introduced in an in-situ manner; and meanwhile, active points which facilitate growth of the carbon nanotubes are generated under mixed atmosphere of ammonia gas and hydrocarbons based on the transitional metal components introduced in a modifying process of the ordered mesoporous carbon material so as to realize nitridation and growth of carbon nanotubes in one step. The composite catalyst prepared by in-situ growth of carbon nanotubes on ordered mesoporous carbon has large activity specific surface and high conductivity performance, and shows excellent oxygen reduction catalytic performance and high electrochemical stability.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Core shell carbon nano-structure electrocatalyst with high catalytic performance and preparation method thereof
ActiveCN108923050AIncrease profitImprove structural stabilityMaterial nanotechnologyCell electrodesNano structuringIn situ polymerization
The invention discloses a core shell carbon nano-structure electrocatalyst with high catalytic performance and a preparation method thereof. Phthalocyanine iron having an enclosed edge structure is used as a shell, a conductive carbon is used as a core, and an Fe-N4 central structure of iron phthalocyanine unit is used as an active site. The preparation method comprises the following steps: 1), adding the conductive carbon into a mixed solution of pyromellitic dianhydride and phthalic anhydride, and performing drying to obtain powder A; 2), uniformly mixing the powder A with an iron compound,ammonium molybdate and urea to obtain powder B, heating to ensure that the powder B is a fused solution, performing microwave reaction to ensure that in-site polymerization reaction is carried out, and performing washing and drying to obtain the core shell carbon nano-structure electrocatalyst with the high catalytic performance. Being obviously superior to commercial Pt / C catalyst, the novel core shell carbon catalyst disclosed by the invention has excellent high oxygen reduction catalytic activity, excellent circulation stability and excellent CH3OH / CO tolerance; the raw materials used by synthesis of the catalyst are market developed products and are low in cost; the preparation process is simple and feasible, and is suitable for commercial mass production.
Owner:WUHAN UNIV
Carbon-doped nano-catalyst as well as preparation method and application thereof
ActiveCN105413731AHigh catalytic activity for oxygen reductionSimple methodPhysical/chemical process catalystsCell electrodesNano catalystTube furnace
The invention discloses a carbon-doped nano-catalyst as well as a preparation method and an application thereof. The preparation method comprises steps as follows: a whole boiled egg is ground, dehydrated and mixed with g-C3N4, the mass ratio of the dehydrated egg to g-C3N4 is 0.5-2, the mixture is ground uniformly and put in a tube furnace, nitrogen is introduced for protection, the mixture is calcined at the temperature of 800-1,000 DEG C for 1-3 h at the heating speed of 5-15 DEG C / min, and the carbon-doped nano-catalyst is obtained. Raw materials required for the carbon-doped nano-catalyst are cheap, the method is simple, the yield is high, the carbon-doped nano-catalyst with the best catalysis effect is obtained by changing the proportion of raw materials and the heating speed, and the carbon-doped nano-catalyst can replace expensive Pt / C (20%) to a certain extent in the aspect of oxygen reduction effect under the neutrality condition.
Owner:SOUTH CHINA UNIV OF TECH
Silver-containing perovskite type oxygen reduction catalyst, and preparation method thereof
InactiveCN101927172ALarge specific surface areaImprove conductivityCell electrodesMetal/metal-oxides/metal-hydroxide catalystsNitrateDistilled water
The invention relates to a silver-containing perovskite type oxygen reduction catalyst, and a preparation method thereof. The preparation method comprises the steps of: dissolving calcium nitrate (Ca (NO3)2. 4H2O), strontium nitrate (Sr (NO3)2. 6H2O), cobalt nitrate Co (NO3)2. 6H2O), lanthanum nitrate (La (NO3)3. 6H2O) and silver nitrate (AgNO3) into distilled water; adjusting the pH value to be 0.9-3.0, then leading solution to hydrolyze at the constant temperature of 40-95 DEG C, and preparing sol; carrying out the processes of gelling, drying, ageing, drying, high-temperature roasting and the like on the sol; and obtaining La1-x (Cax-ySry) xCoO3 powder containing Ag, namely, the silver-containing perovskite type oxygen reduction catalyst. The silver-containing perovskite type composite oxide catalyst increases the conductivity and enhances the catalytic activity compared with the original perovskite type composite oxide catalyst.
Owner:KUNMING UNIV OF SCI & TECH
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