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48results about How to "Methanol tolerance is good" patented technology
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Preparation method of heteroatom doped graphene hierarchical pore carbon material
A preparation method of a heteroatom doped graphene hierarchical pore carbon material comprises the following steps: preparing graphene micro-sheet dispersing liquid by using graphene, then carrying out pore-forming etching on graphene micro-sheets in the graphene micro-sheet dispersing liquid, and preparing porous graphene micro-sheets; mixing the porous graphene micro-sheets with a fatty acid metal compound coating agent and a dopant to obtain oil-phase viscous graphene-based precursor; carrying out programmed heat treatment; carrying out acid pickling, water washing and solid-liquid separation on a product after heat treatment, and drying solid to obtain the final product. The preparation method has the advantages of low cost, simple process, low energy consumption, wide raw material source, and capability of large-scale production.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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
Cobalt-nitrogen-sulfur co-doped carbon aerogel di-functional oxygen catalyst and preparation method and application thereof
ActiveCN107308977AEasy to buyEasy to manufacturePhysical/chemical process catalystsCell electrodesPorous carbonFreeze-drying
The invention discloses a cobalt-nitrogen-sulfur co-doped carbon aerogel di-functional oxygen catalyst and a preparation method and application thereof. The method comprises the following steps: uniformly combining cobalt ions with sodium alginate; performing hydrothermal treatment together with dopamine and mercaptan; centrifuging to obtain dopamine / mercaptan / cobalt-sodium alginate hydrogel; performing high-temperature calcination on the dopamine / mercaptan / cobalt-sodium alginate hydrogel obtained after freeze drying to obtain the cobalt-nitrogen-sulfur co-doped carbon aerogel di-functional oxygen catalyst. The catalyst is an aerogel porous material with an average aperture of 2 to 4 nanometers and a specific surface area of 126.8 to 138.3m<2> / g; cobalt exists in the form of a Co simple substance, CoO and Co3O4; a nitrogen atom doped in a porous carbon material mainly exists in the form of pyrrole and graphite. The cobalt, nitrogen and sulfur are co-doped, so that the catalyst has high oxygen evolution and oxygen reduction catalytic activities at the same time under an alkaline condition; moreover, the catalyst has the advantages of adoption of low-cost raw materials, simple preparation method, easiness in operation and convenience for large-scale production.
Owner:东营睿港投资服务有限责任公司
Nitrogen and cobalt double-doped porous carbon composite bifunctional oxygen catalyst and preparation method and application thereof
ActiveCN107604375AEasy to buyEasy to manufactureCell electrodesElectrodesPorous carbonOxygen evolution
The invention discloses a nitrogen and cobalt double-doped porous carbon composite bifunctional oxygen catalyst and a preparation method and application thereof. The preparation method comprises the steps that firstly, under a hydrothermal condition, divalent cobalt ions, melamine and sodium alginate are compounded to obtain melamine / cobalt ion-sodium alginate; and secondly, high-temperature calcination is performed, and then the nitrogen-cobalt double-doped porous carbon bifunctional oxygen catalyst is prepared. The catalyst is made of a porous material, the average hole diameter of the catalyst is 2 nm-8 nm, and the specific area is 148.23 m<2> / g-188.27 m<2> / g. According to the catalyst, cobalt exists in the forms of the Co elementary substance, CoO and Co3O4; and nitrogen atoms doped inthe porous carbon material exist in the forms of pyrrole and pyridine. Due to double doping of the cobalt and nitrogen, the catalyst has high oxygen evolution and oxygen reduction catalytic activity,good stability and excellent methyl alcohol tolerance at the same timeunder alkaline conditions, used raw materials are low in cost, the preparation method is simple, operation is easy, and large-scale production is convenient.
Owner:江苏世丰企业管理咨询有限公司
ZIF-8@FeMOF derived Fe-N codoped carbon material, and preparation method and application of material
ActiveCN109616672AImprove catalytic performanceLow costCell electrodesMetal-organic frameworkSolvent
The invention discloses a ZIF-8@FeMOF derived Fe-N codoped carbon material, and a preparation method and an application of the material. The preparation method comprises the steps of 1) performing a contact reaction on FeMOF, a zinc source, 2-methylimidazole and a surfactant in a solvent to prepare ZIF-8@FeMOF, and 2) performing calcination on ZIF-8@FeMOF to prepare the ZIF-8@FeMOF derived Fe-N codoped carbon material, wherein FeMOF is a metal-organic framework material which consists of Fe<3+> and an organic ligand and has a reticular structure; and ZIF-8 is a zeolite imidazate framework material obtained by a reaction of Zn<2+> and 2-methylimidazole. The ZIF-8@FeMOF derived Fe-N codoped carbon material has a loose porous structure and many active sites, and can efficiently catalyze a cathodic oxygen reduction reaction of a fuel cell; and the preparation method has the advantages of greenness, cleanness, high efficiency, simplicity, low cost and the like.
Owner:ANHUI NORMAL UNIV
A cobalt monoatomic catalyst with cobalt atoms anchored on carbon nanofibers and a preparation method and application thereof
The invention relates to a cobalt monoatomic catalyst with cobalt atoms anchored on carbon nanofibers and a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving a cobalt source, a complexing agent and a nitrogen-containing polymer in a solvent to obtain an external solution; An internal solution in which the soluble polymer is dissolved in a solvent; 2, spinning theouter solution and the inn solution into primary spinning fibers by coaxial electrostatic filament spinning; S3: after removing the soluble polymer from the silk spinning fiber, calcining at 500-1000 DEG C for 2-5h to obtain the cobalt monoatomic catalyst. The cobalt monoatomic catalyst prepared by electrostatic filament spinning technology and high-temperature calcination has the advantages of small diameter, small pore size, high porosity, good fiber homogeneity, good ORR and OER catalytic performance, excellent methanol tolerance and stability, and can be widelyapplied to fuel cells and metal-air batteries. The preparation method provided by the invention is simple in process and easy to operate.
Owner:GUANGDONG UNIV OF TECH
Zinc-based metal organic framework material, preparation method of iron-nitrogen co-doped carbon-based oxygen reduction electrocatalyst and application
The invention discloses a zinc-based metal organic framework material, a preparation method of an iron-nitrogen co-doped carbon-based oxygen reduction electrocatalyst and an application. A catalyst ofthe invention is based on a newly designed zinc-based metal organic framework material, a precursor Fe-Zn-TTPA is prepared by a one-pot method on the basis of the zinc-based metal organic framework material, and the precursor Fe-Zn-TTPA is carbonized at a high temperature to obtain an iron-nitrogen-carbon-oxygen reduction electrocatalyst. The material is simple and easy to obtain, cost is low, and the prepared iron-nitrogen co-doped carbon-based oxygen reduction electrocatalyst is high in oxygen reduction catalytic activity, has good stability and methanol tolerance, can replace a noble metalPt / C catalyst as a catalytic material and can be applied to a fuel cell or a metal-air cell, and has a wide application prospect and practical value.
Owner:SOUTHEAST UNIV
MoS2 nanosphere difunctional oxygen catalyst of hierarchy structure and preparation method and application thereof
ActiveCN106622301ARaw materials are cheap and easy to getEasy to prepareElectrolysis componentsCell electrodesElectricityOverpotential
The invention relates to a MoS2 nanosphere difuncitonal oxygen catalyst of a hierarchy structure a preparation method thereof and application thereof in electrocatalyzing oxygen in an alkaline medium. The MoS2 nanosphere difuncitonal oxygen catalyst is MoS2 nanospheres which are synthesized by taking Na2MoO4 and KSCN as raw materials and adopting a hydrothermal method and have the hierarchy structure, and the MoS2 nanospheres are formed by a plurality of MoS2 nanosheets, so that the MoS2 nanospheres have a large specific surface area, and edge sits of the MoS2 nanosheets are fully exposed. Due to multiporous flower-shaped nanospheres formed by ultra-thin MoS2 nanosheet units, the effective electrochemical catalysis area and the catalytic sites are increased, and the electron conduction rate is quickened, so that overpotential of an oxygen evolution reaction and an oxygen reduction reaction can be effectively reduced; a rotating disk electrode and a rotating ring disk electrode show that the oxygen reduction process is based on a four-electron catalytic mechanism and is a relatively ideal oxygen reduction reaction process.
Owner:江苏乐士源新能源科技有限公司
Preparation method for nitrogen-doped carbon dot/graphene oxide nanocomposite electrocatalyst
InactiveCN108281673AHigh nitrogen contentWide variety of sourcesCell electrodesNanotechnologyVacuum dryingNitrogen doped
The invention discloses a preparation method for a nitrogen-doped carbon dot / graphene oxide nanocomposite electrocatalyst. The preparation method comprises the following steps: ultrasonically dissolving citric acid, urea and graphene oxide in ultrapure water, carrying out a hydrothermal reaction at 160-200 DEG C for 10-13 h after uniform dispersion, and after the reaction is completed, carrying out natural cooling to room temperature; and removing excess citric acid and urea through centrifugation, and carrying out vacuum drying at 40-60 DEG C for 23-25 h to remove water so as to obtain thenitrogen-doped carbon dot / graphene oxide nanocomposite electrocatalyst. Compared with commercial Pt / C catalysts, the N-Cdots / GO nanocomposite electrocatalyst disclosed in the invention presents excellent electrocatalytic performance with a corrected initial potential (0.13 V vs. Ag / AgCl), greater current density (up to 18.4 mA at -0.70 V), excellent electrochemical stability and resistance to methanol or carbon monoxide toxicity; in addition, compared with a mixture of N-Cdots and N-Cdots / GO, the N-Cdots / GO nanocomposite electrocatalyst shows catalytic efficiency comparable to the commercial Pt / C catalysts.
Owner:NANJING UNIV OF SCI & TECH
Hollow CeO2 sphere@Co-N/C nanometer composite material and preparation method and application thereof
ActiveCN109967084AImprove oxygen reduction performanceExcellent redox activityCell electrodesFuel cellsCeriumSolvent
The invention discloses a hollow CeO2 sphere@Co-N / C nanometer composite material and a preparation method and application thereof. The preparation method includes the steps that cerium salt and polydopamine nanoballs are in contact and react, and through air gradient calcination, hollow CeO2 balls are obtained; in a second solvent, the CeO2 balls, a cobalt source and D-(+)glucosamine hydrochlorideare subjected to contact reaction to be made into a CeO2sphere@Co-N / C precursor; the CeO2 sphere@Co-N / C precursor is calcined in a nitrogen atmosphere. The catalysis performance of the composite material is the same as that of Pt and Pt-based catalystsand is good, the cost of the catalysts can be reduced, and the composite material has stable oxygen reduction catalysis performance andmethanol resistance and can efficiently catalyze oxygen reduction reaction of a fuel cellcathode; the preparing method has the advantages of being environmentally friendly, clean, efficient, simple, low in cost and the like.
Owner:ANHUI NORMAL UNIV
Preparation method of cathode oxygen reduction reaction catalyst based on two-dimensional graphite phase carbon nitride cobalt doped porous carbon material
ActiveCN113394413AEasy to operateReaction conditions are easy to controlCell electrodesPtru catalystPorous carbon
The invention relates to a preparation method of a cathode oxygen reduction reaction catalyst based on a two-dimensional graphite phase carbon nitride cobalt doped porous carbon material. An active substance of a nano material is C3N4@Co-BDC-TA. The problems existing in an existing fuel cell catalyst are solved, the defects in the prior art are overcome, the problems of single precursor obstacle and low synthesis cost of the existing fuel cell catalyst are generally faced, and the defects of high cost, toxicity and the like of a platinum-based catalytic material are overcome; and on the basis of a two-dimensional layered g-C3N4 material, a porous carbon material formed by taking tannin as a connecting agent and fixing metal Co with terephthalic acid is developed, and the porous carbon material has the advantages of relatively high initial potential and half-slope potential, excellent limiting current, excellent stability, good methanol tolerance, relatively high methanol poisoning resistance and the like.
Owner:FUZHOU UNIV
Non-noble metal catalyst and preparation method thereof
InactiveCN109713327AImprove catalytic performanceMethanol tolerance is goodFuel and primary cellsMaterial nanotechnologyFuel cellsNanoparticle
The invention discloses a non-noble metal catalyst and a preparation method thereof. The non-noble metal catalyst is obtained by subjecting a first mixture containing an aromatic nitrile compound anda metal oxide in the presence of a nonactive gas and Lewis acid to heat treatment, wherein the metal oxide is a nanoparticle. The non-noble metal catalyst provided by the invention has good catalyticactivity, methanol resistance and stability, is low in production cost, and can be produced and applied on a large scale in fuel cells.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Iron-nickel polyphenol network nano-composite carbon material electrocatalyst based on chitosan modified cellulose aerogel and preparation method of iron-nickel polyphenol network nano-composite carbon material electrocatalyst
The invention belongs to the technical field of proton membrane fuel cell catalysts, and discloses an iron-nickel polyphenol network nano-composite carbon material electrocatalyst based on chitosan modified cellulose aerogel and a preparation method of the iron-nickel polyphenol network nano composite carbon material electrocatalyst. The preparation method comprises steps of using chitosan as a modifier of nano cellulose to prepare chitosan / nano cellulose composite aerogel as a catalyst carrier; preparing an iron-nickel doped CS / CNC-coated FeNi precursor with a supramolecular framework through water bath oscillation, and finally performing high-temperature carbonization to obtain the iron-nickel supramolecular network framework nanocomposite electrocatalyst. The CCTS-CA@Fe0.64Ni0.36 nano composite material prepared by the preparation method disclosed by the invention has good conductivity, high chemical stability and thermal stability and good electrocatalytic property, can be used as an efficient electrocatalyst capable of replacing traditional commercial Pt / C, and has great potential application value.
Owner:FUZHOU UNIV
Ultrasonic synthesis method and application of spiral ferronickel supramolecular network framework nano composite material
ActiveCN113054208ASalient onset potentialImprove stabilityCell electrodesPtru catalystMaterials science
The invention belongs to the field of oxygen reduction electro-catalysis, and particularly relates to an ultrasonic synthesis method and an application of a spiral ferronickel supramolecular network framework nano composite material. An active substance of the nano material is C@ NiFe2O4 and presents a spiral-like shape, and the ultrasonic synthesis method is simple, low in cost, and short in reaction time. And the synthesized composite material is high in yield, uniform in morphology, large in specific surface area and easy to realize industrial production. The method is used for overcoming the defects that an existing fuel cell catalyst is low in cathode oxygen reduction reaction reversibility and small in exchange current density, and a Pt-based catalytic material is high in cost, has toxicity and the like, and the obtained oxygen reduction catalyst has the advantages of high potential, excellent limiting current, high stability, methanol tolerance and the like so that as the high-efficiency electrocatalyst, the C@ NiFe2O4 has a great potential application value.
Owner:FUZHOU UNIV
Double-MOF connection structure nano composite electrocatalyst for proton membrane fuel cell and preparation method thereof
ActiveCN112701307AEasy to operateReaction conditions are easy to controlMaterial nanotechnologyCell electrodesPtru catalystFuel cells
The invention discloses a double-MOF connection structure nano composite electrocatalyst for a proton membrane fuel cell, and the double-MOF nano composite electrocatalyst for the proton membrane fuel cell is characterized in that the active substance of the nano material is ZIF-8@ TA / ZIF-67@TA. The problems of an existing fuel cell catalyst are solved, the defects of the prior art are overcome, the problems that an existing fuel cell catalyst generally faces a single precursor and is low in synthesis cost are solved, and the defects that a Pt-based catalytic material is high in cost, toxic and the like are overcome. On the basis of a unique connecting structure of ZIF-8 and ZIF-67, the metal organic framework nano composite material for the proton membrane fuel cell is developed, and has the advantages of high initial potential, half-slope potential, excellent limiting current, excellent stability, good methanol tolerance, relatively strong methanol poisoning resistance and the like.
Owner:FUZHOU UNIV
Preparation method and application of Zn/Co-N-C carbon nanotube oxygen reduction catalyst for autocatalytic growth
PendingCN113594474AAvoid gatheringAvoid reunionCell electrodesCarbon nanotubesElectrolytic agentPtru catalyst
The invention discloses a preparation method and application of a Zn / Co-N-C carbon nanotube oxygen reduction catalyst for autocatalytic growth. The preparation method comprises the following steps: stirring a methanol dispersion of 2-methylimidazole zinc salt and a methanol dispersion of zinc nitrate hexahydrate, graphene oxide and cobalt acetylacetonate (III) at room temperature to obtain a mixture; carrying out centrifugation, methanol washing and drying treatment, carrying out high-temperature calcination under the protection of inert gas, and cooling to room temperature; and soaking the product in acid, washing for multiple times, and drying to obtain the target product Zn / Co-N-C carbon nanotube oxygen reduction catalyst. The carbon nanotube oxygen reduction catalyst prepared by the invention has a hierarchical porous property, and shows excellent oxygen reduction activity, cycling stability and methanol tolerance in both alkaline and acidic electrolytes. When the prepared carbon nanotube oxygen reduction catalyst is applied to a cathode of a zinc air battery, good power density and satisfactory cycling stability are shown.
Owner:HENAN NORMAL UNIV
A kind of bifunctional catalyst for oxygen evolution and oxygen reduction and preparation method thereof
ActiveCN112536058BMethanol tolerance is goodImprove stabilityPhysical/chemical process catalystsCell electrodesPtru catalystOxygen evolution
The invention belongs to the technical field of oxidant preparation, and discloses a dual-function catalyst for oxygen precipitation and oxygen reduction and a preparation method thereof. The nickel foam is immersed in HCl solution, cleaned with deionized water, and then dried in an oven; Put the nickel foam into the containing CoCl 2 ·6H 2 O and NiCl 2 ·6H 2 In the solution of O, cyclic voltammetry is used to deposit nickel hydroxide cobalt composite material on the surface of nickel foam; the foam nickel obtained after electrodeposition is taken out, washed and dried; the mixture of foam nickel and melamine and thiourea are placed in the double zone respectively The temperature controls the downwind portion and the upwind portion of the tube furnace for heating. The onset potential of the catalyst of the present invention is 1.52V (vs.RHE) in OER, and in ORR, compared with 20% commercial Pt / C, the onset potential is 0.95V (vs.RHE), which has better Methanol tolerance and stability.
Owner:UNIV OF JINAN
Preparation method and application of electro-catalytic oxygen reduction catalytic material N-PC @CBC
PendingCN111740117AImprove storage effectExcellent ORR performanceCell electrodesSecondary cellsPtru catalystCarbonization
The invention relates to an electrocatalytic oxygen reduction catalytic material N-PC@CBC as well as a preparation method and application thereof. The preparation method comprises the following stepsof S1, dispersing bacterial cellulose (BC) and zinc nitrate hexahydrate into methanol, and dissolving 2-methylimidazole into a methanol solution with the same volume; S2, stirring the two solutions obtained in the step S1, and standing to form a ZIF-8-coated BC nanofiber composite material; and S3, freezing and drying the ZIF-8-coated BC material and carrying out high-temperature carbonization toobtain the N-PC@CBC material. The preparation method provided by the invention has the characteristics of excellent performance, simple process flow, low cost, safety, environmental protection and thelike, and compared with a commercial 20wt% Pt / C catalyst, the obtained catalyst shows better methanol tolerance and stability in an alkaline medium, and a sodium ion battery prepared by taking the obtained product as an electrode shows good cycling stability and has high specific capacity after multiple cycles.
Owner:NANJING UNIV OF SCI & TECH
Construction of stamen-type s-doped manganese-copper electrocatalysts based on metal polyphenol-modified sodium alginate/nanocellulose composite aerogels
ActiveCN113394414BEasy to operateReaction conditions are easy to controlCell electrodesPtru catalystPorous carbon
Owner:FUZHOU UNIV
Nitrogen-doped graphene/nickel-iron hydrotalcite bifunctional oxygen catalyst and its preparation method and application
ActiveCN105514450BEasy to buyEasy to manufacturePhysical/chemical process catalystsCell electrodesNitrogen doped grapheneOxygen
The invention relates to a nitrogen-doped graphene-ferronickel hydrotalcite non-noble metal difunctional oxygen catalyst and a preparation method thereof and electrocatalysis application of the oxygen catalyst in an alkaline medium to an oxygen evolution reaction and an oxygen reduction reaction. According to the catalyst, a micelle is taken as a template, ferronickel hydrotalcite is assembled on graphene oxide under the hydrothermal condition to form a spherical porous compound, the graphene oxide is reduced and doped with a nitrogen carbide nanosheet simultaneously under the hydrothermal condition, and then the nitrogen-doped graphene-ferronickel hydrotalcite oxygen catalyst is obtained. The method comprises the steps that the graphene oxide and metal salt are firstly dispersed into the micelle, the graphene oxide-ferronickel hydrotalcite compound is obtained through hydro-thermal synthesis under the alkaline condition, the product is doped with the nitrogen carbide nanosheet under the hydrothermal condition, and then the oxygen catalyst is obtained. The oxygen catalyst has the catalytic activity both on oxygen evolution and oxygen reduction under the alkaline condition and is high in stability and methyl alcohol tolerance, low in used raw material cost, simple in preparation method and convenient for scale production.
Owner:湛江市菱霸润滑油有限公司
Preparation method of bayberry-shaped cobalt-nickel-boron composite carbon material proton membrane fuel cell catalyst
ActiveCN112886024BEasy to operateReaction conditions are easy to controlMaterial nanotechnologyCell electrodesPtru catalystFuel cells
The invention relates to a method for preparing a bayberry-shaped cobalt-nickel-boron composite carbon material proton membrane fuel cell catalyst. The nanomaterial active substance is a bayberry-shaped cobalt-nickel-boron composite carbon material, referred to as CoNi@TA / B. Solve the existing problems of existing fuel cell catalysts and overcome the defects of the prior art. At present, fuel cell catalysts generally face the problems of single precursor and synthesis cost, as well as defects such as high cost and toxicity of Pt-based catalytic materials; based on CoNi MOF With a unique structure, a metal-organic framework nanocomposite material for proton membrane fuel cells has been developed, which has high onset potential, half-slope potential, excellent limiting current, excellent stability and good methanol tolerance, It has the advantages of strong resistance to methanol poisoning.
Owner:FUZHOU UNIV
Preparation method and application of a zinc-based metal-organic framework material and its iron-nitrogen co-doped carbon-based oxygen reduction electrocatalyst
The invention discloses a preparation method and application of a zinc-based metal-organic framework material and its iron-nitrogen co-doped carbon-based oxygen reduction electrocatalyst. The catalyst of the invention is based on a newly designed zinc-based metal-organic framework material. The precursor Fe-Zn-TTPA was prepared by one-pot method based on metal-organic framework materials, and the precursor Fe-Zn-TTPA was carbonized at high temperature to obtain an iron-nitrogen-carbon-oxygen reduction electrocatalyst. The material of the invention is simple and easy to obtain, and the cost is low. The prepared iron-nitrogen co-doped carbon-based oxygen reduction electrocatalyst has high oxygen reduction catalytic activity, good stability and methanol tolerance, and can replace the noble metal Pt / C catalyst as The application of catalytic materials in fuel cells or metal-air batteries has broad application prospects and practical value.
Owner:SOUTHEAST UNIV
Nickel-iron-nitrogen-doped carbon material trifunctional electrocatalyst based on zif-8 and its preparation method and application
ActiveCN112005413BHigh catalytic activityImprove conductivityCell electrodesOrganic-compounds/hydrides/coordination-complexes catalystsElectronic structurePtru catalyst
The invention provides a ZIF-8-based nickel-iron-nitrogen-doped carbon material trifunctional electrocatalyst and its preparation method and application, belonging to the technical field of electrochemical catalysis. The invention provides a ZIF-8-based nickel-iron-nitrogen-doped carbon material trifunctional electrocatalyst, which has a core-shell structure, and the core layer is composed of nanoparticles containing iron and nickel elements, and is composed of nitrogen-doped carbon materials Shell. The electrocatalyst provided by the present invention has a core-shell structure, which can accelerate the electron transfer efficiency of the reaction process; the doping of iron, nickel and nitrogen changes the electronic structure and morphology of the carbon material, and improves the conductivity and catalytic performance of the catalyst. Therefore, the electrocatalyst provided by the present invention exhibits excellent multifunctional electrocatalytic performance, has good methanol tolerance and cycle stability, and has potential application value in technologies such as fuel cells and electrolyzed water.
Owner:青岛鸿硅高沃新材料科技有限公司
Preparation method of leaf-based nitrogen-doped porous carbon, and application of leaf-based nitrogen-doped porous carbon in oxygen reduction electro-catalysis within full pH range
ActiveCN113998697AWidely distributedLow costCarbon compoundsCell electrodesSodium acetateAcetic acid
The invention discloses a preparation method of leaf-based nitrogen-doped porous carbon, and application of the leaf-based nitrogen-doped porous carbon in oxygen reduction electro-catalysis in a full pH range. The preparation method comprises the following steps: cleaning, drying and grinding leaf-based biomass; weighing a certain amount of a biomass powder material, soaking the biomass powder material in an acetic acid-sodium acetate solution containing hemicellulase, standing for a period of time at a constant temperature, hydrolyzing, filtering, washing, drying, pre-carbonizing in an inert atmosphere, cooling to room temperature, grinding into powder, weighing the powder, a nitrogen source and an activating agent according to a mass ratio, performing high-energy vacuum mechanical ball milling, performing high-temperature carbonization on the ball-milled mixture in an inert atmosphere, performing acid pickling, filtering washing with water until filtrate is neutral, and drying to obtain the nitrogen-doped porous carbon material. Biomass is modified by utilizing an enzyme synergistic high-energy vacuum mechanical force ball milling method, and the prepared nitrogen-doped porous carbon material is large in specific surface area, obvious in hierarchical pore structure and rich in nitrogen content, and has excellent ORR electrocatalytic activity in a whole pH range (0-13).
Owner:CHINA UNIV OF MINING & TECH
Preparation method of copper hydroxide two-dimensional nanocomposite based on iron-based dopamine supramolecular modification
ActiveCN113422070BReaction conditions are easy to controlHigh onset potentialMaterial nanotechnologyCell electrodesPtru catalystNanocomposite
The invention discloses a method for preparing a copper hydroxide two-dimensional nanocomposite material based on iron-based dopamine supramolecular modification, which uses CuCl 2 , PEG, etc. as raw materials to prepare Cu(OH) 2 nanosheets, which were then dispersed in absolute ethanol to obtain Cu(OH) 2 solution, then add dopamine and Fe(NO) 3 9H 2 O, through hydrothermal reaction and heat treatment, a 2D material that can be used as a fuel cell anode material is finally prepared Cu(OH)2 @PDA‑Fe. The composite material obtained in the present invention has higher initial potential, half-slope potential, excellent limiting current, excellent stability and good methanol tolerance, has strong resistance to methanol poisoning, etc., and can solve the problem of existing fuel cells. The catalyst has problems such as single precursor, high cost and toxicity of Pt-based catalytic materials, and it is expected to be used to replace Pt / C catalysts.
Owner:FUZHOU UNIV
Synthesis method and application of a copper polyphenol-triazine supramolecular network structure nanocomposite
ActiveCN113497237BImprove oxygen reduction performanceTightly boundCell electrodesPtru catalystFuel cells
The invention belongs to the technical field of fuel cell catalysts, and in particular relates to a synthesis method and application of a copper polyphenol-triazine supramolecular network structure nanocomposite material. The method comprises the following steps: weighing 1,3,5-triazine-2,4,6-triamine and saturated polycyclic ketone, reacting to obtain covalent triazine-based organic polymer CTP; making CTP into CPT-polyphenol solution ; Combine the copper polyphenol solution and the CPT polyphenol solution to react; centrifuge and dry the product obtained from the reaction to obtain a precursor; the precursor is calcined under an inert atmosphere to obtain a copper polyphenol triazine supramolecular network structure nanocomposites. The present invention uses a covalent triazine-based organic polymer as the base material, and obtains a nanocomposite material with excellent oxygen reduction performance through the functional modification means of the polyphenol network, and realizes the combination of the metal polyphenol network and the triazine polymer skeleton. Closely combined, it has the characteristics of cost-effective, green and environmental protection.
Owner:FUZHOU UNIV
Cobalt single-atom catalyst anchored on carbon nanofibers with cobalt atoms and its preparation method and application
The invention relates to a cobalt single-atom catalyst in which cobalt atoms are anchored on carbon nanofibers, a preparation method and application thereof. The preparation method includes the following steps: S1: dissolving cobalt source, complexing agent and nitrogen-containing polymer in a solvent to obtain an external solution; dissolving a soluble polymer in a solvent to obtain an internal solution; S2: using a coaxial electrostatic wire Spinning the external solution and the internal solution to obtain the as-spun fiber; S3: After removing the soluble polymer in the spun fiber, calcining at 500-1000°C for 2-5 hours at a high temperature to obtain the cobalt single-atom catalyst. The cobalt single-atom catalyst prepared by the electrostatic spinning technology and high-temperature calcination has the advantages of small diameter, small pore size, high porosity, good fiber uniformity, etc., and has good ORR and OER catalytic performance, excellent methanol resistance Acceptability and stability, can be widely used in fuel cells, metal-air batteries. The preparation method provided by the invention has simple process and is easy to operate.
Owner:GUANGDONG UNIV OF TECH
Preparation method of plant polyphenol-modified supramolecular network framework structure manganese-based nanocomposite electrocatalyst
ActiveCN112968185BEasy to operateReaction conditions are easy to controlMaterial nanotechnologyCell electrodesPtru catalystFuel cells
The invention relates to a preparation method of a plant polyphenol-modified supramolecular network frame structure manganese-based nanocomposite electrocatalyst, wherein the nanomaterial active substance is ZIF-8@TA-Mn. Solve the problems of existing fuel cell catalysts and overcome the defects of the existing technology. At present, fuel cell catalysts generally face the problems of single precursor and synthesis cost, as well as the high cost and toxicity of Pt-based catalytic materials. Based on ZIF‑ 8 Unique structure, developed a metal-organic framework nanocomposite for proton membrane fuel cells with high onset potential, half-slope potential, excellent limiting current and excellent stability and good methanol tolerance , has the advantages of strong anti-methanol poisoning ability.
Owner:FUZHOU UNIV
A kind of mos2 nanosphere bifunctional oxygen catalyst with hierarchical structure and its preparation method and application
ActiveCN106622301BRaw materials are cheap and easy to getEasy to manufactureElectrolysis componentsCell electrodesOxygenRotating ring-disk electrode
The invention relates to a MoS2 nanosphere difuncitonal oxygen catalyst of a hierarchy structure a preparation method thereof and application thereof in electrocatalyzing oxygen in an alkaline medium. The MoS2 nanosphere difuncitonal oxygen catalyst is MoS2 nanospheres which are synthesized by taking Na2MoO4 and KSCN as raw materials and adopting a hydrothermal method and have the hierarchy structure, and the MoS2 nanospheres are formed by a plurality of MoS2 nanosheets, so that the MoS2 nanospheres have a large specific surface area, and edge sits of the MoS2 nanosheets are fully exposed. Due to multiporous flower-shaped nanospheres formed by ultra-thin MoS2 nanosheet units, the effective electrochemical catalysis area and the catalytic sites are increased, and the electron conduction rate is quickened, so that overpotential of an oxygen evolution reaction and an oxygen reduction reaction can be effectively reduced; a rotating disk electrode and a rotating ring disk electrode show that the oxygen reduction process is based on a four-electron catalytic mechanism and is a relatively ideal oxygen reduction reaction process.
Owner:江苏乐士源新能源科技有限公司
hollow ceo 2 Sphere@co-n/c nanocomposite material and its preparation method and application
ActiveCN109967084BExcellent redox activityLow costCell electrodesFuel cellsPtru catalystNitrogen gas
The invention discloses a hollow CeO 2 Sphere@Co‑N / C nanocomposite material and its preparation method and application, including: contact reaction between cerium salt and polydopamine nanospheres, and obtain hollow CeO through air gradient calcination 2 spheres; in the second solvent, the hollow CeO 2 spheres, cobalt source, D‑(+) glucosamine hydrochloride for contact reaction to prepare hollow CeO 2 spheres@Co‑N / C precursor; the hollow CeO 2 The sphere@Co‑N / C precursor was calcined under nitrogen atmosphere. The catalytic performance of the composite material is equivalent to that of Pt and Pt-based catalysts, the catalytic performance is good, and the cost of the catalyst can be reduced, and it has the stability of oxygen reduction catalytic performance and methanol tolerance. The composite material can efficiently catalyze the fuel cell cathode oxygen reduction reaction, and its preparation method has the advantages of greenness, cleanness, high efficiency, simplicity and low cost.
Owner:ANHUI NORMAL UNIV
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