421 results about "Phosphide" patented technology

The invention relates to the technical field of biodiesel hydrogenation catalysts, and particularly discloses a hydrogenation catalyst of organic bentonite loaded cerium-zirconium solid solution and nickel-molybdenum phosphide as well as a preparation method and application of the hydrogenation catalyst. The hydrogenation catalyst with the organic bentonite loaded with the cerium-zirconium solid solution and the nickel-molybdenum phosphide comprises an organic bentonite carrier, the cerium-zirconium solid solution and the nickel-molybdenum phosphide, the loading capacity of the cerium-zirconium solid solution on the organic bentonite carrier is 2-2.5 wt%; the cerium-zirconium solid solution comprises cerium dioxide and zirconium dioxide; the loading capacity of the nickel molybdenum phosphide on the organic bentonite carrier is 10-15 wt%; and the nickel molybdenum phosphide is Ni2Mo3P. The organobentonite carrier provides an acid site and promotes deoxidation path optimization, the layered structure of the organobentonite carrier can limit the cerium-zirconium solid solution and the nickel-molybdenum phosphide, and organic groups are also embedded into the layered structure, so that the organic compatibility of the organobentonite carrier to biodiesel is improved, and the catalytic efficiency is improved. The cerium-zirconium solid solution provides oxygen vacancies, promotes hydrogenation / deoxidation, and improves the thermal stability and sintering resistance of the catalyst.

The invention discloses a coal tar hydrogenation catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier and an active metal component, wherein the carrier is a gallium modified silicon-aluminum carrier; in the gallium modified silicon-aluminum carrier, based on the mass of the gallium modified silicon-aluminum carrier, the mass content of gallium oxide is 2.0%-5.0%, the mass content of silicon dioxide is 20.0%-60.0%, and the mass content of aluminum oxide is 35.0%-78.0%; the active metal component comprises Mo and a group VIII metal element; the Mo comprises + 5 valence Mo; the group VIII metal element exists in the catalyst in the form of metal phosphide. The catalyst has high hydrogenation activity, appropriate cracking activity and good stability, and effectively improves the quality and yield of coal tar hydrogenation product oil.

The invention relates to composition and preparation of a thick-film copper conductor sintered at different temperatures and different atmospheres, and belongs to the field of chemical preparation. Comprising the following steps: mixing 65-85% of copper powder, 3.0%-15.0% of glass, 15.0%-35.0% of an organic adhesive and 0.1-1.5% of an additive which is one or more of titanium trioxide or stannous oxide, cuprous oxide and copper oxide, rolling into slurry, and sintering at 850-950 DEG C under the protection of nitrogen or ammonia gas to obtain a copper conductor. The medium-temperature copper paste is prepared by the following steps: mixing 60.0-85.0% of copper powder, 3.0-13.0% of glass, 8.0-25.0% of an organic adhesive and 0.2-1.6% of an additive which is one or more of titanium sesquioxide or stannous oxide, cuprous oxide and copper oxide, rolling into paste, and sintering at 450-650 DEG C under the protection of nitrogen or ammonia gas to obtain a copper conductor. The low-temperature copper paste is prepared by mixing 60.0-85.0% of copper powder, 3.0-13.0% of glass, 8.0-25.0% of an organic binder and 0.1-2.0% of an additive which can be one or more of elemental elements of magnesium, zinc, boron and phosphorus or one or more of nickel phosphide, nickel boride, copper phosphide and copper oxide, rolling the mixture into paste, and sintering the paste in air at 250-350 DEG C to obtain a copper conductor.

The invention belongs to the technical field of water electrolysis hydrogen production catalysts, and particularly relates to a preparation method and application of a bimetallic phosphide coupling layered double hydroxide electrocatalyst. The preparation method comprises the following steps: by taking a nickel source, an iron source, ammonium fluoride and urea as reactants, carrying out hydrothermal reaction to form a nickel-iron layered double hydroxide nano-catalyst precursor on a conductive substrate; and carrying out phosphating treatment on the nickel-iron layered double hydroxide nano-catalyst precursor by an electrodeposition method to obtain the bimetallic phosphide coupled layered double hydroxide electrocatalyst. Under the 1M potassium hydroxide solution test condition, the overpotential required by the catalyst is 89 mV when the current density in a linear scanning voltammetry curve is 10 mA cm <-2 >, and the catalyst is high in stability, simple in manufacturing process, energy-saving, suitable for industrial application and capable of being used for large-scale water electrolysis hydrogen production.

The invention discloses a hydrocracking catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier and an active metal component, the carrier comprises a modified Y molecular sieve and aluminum oxide, and the modified Y molecular sieve has the following properties: the crystal particle size is 500 nm or less, the molar ratio of silicon oxide to aluminum oxide is 8-55, the specific surface area is 640-800 m < 2 > / g, the unit cell parameter is 2.433-2.460 nm, and the average pore size is 10-30 nm; the active metal component comprises Mo and a group VIII metal element; the Mo comprises + 5 valence Mo; the group VIII metal element exists in the catalyst in the form of metal phosphide. The catalyst has excellent isomerization performance and aromatic hydrocarbon conversion capability, and is suitable for a hydrocracking process for producing special oil and lubricant base oil.

The invention provides a multifunctional carbon fiber lithium battery based on a sulfide composite electrolyte membrane and a preparation method and application of the multifunctional carbon fiber lithium battery, and belongs to the technical field of lithium batteries and functional composite materials. According to the invention, a nitrogen phosphide interface layer is constructed on the surface of a sulfide electrolyte membrane or a nitrogen phosphide derivative is dispersed in a bulk phase, so that the stability of an electrolyte and a metal lithium interface is effectively improved, and lithium dendrites are inhibited; and by combining the multifunctional characteristics of the carbon fiber and glass fiber woven cloth, high specific energy and light weight can be realized, the overall safety and mechanical strength are enhanced, and the composite material is suitable for various high-performance energy storage occasions.

The invention provides a preparation method of a molybdenum phosphide / titanium nitride composite material and a battery positive electrode material and a lithium-carbon dioxide battery, and belongs to the technical field of new energy materials. And then a titanium nitride conductor layer is deposited on the molybdenum phosphide by using an atomic layer deposition technology to prepare the molybdenum phosphide / titanium nitride, the molybdenum phosphide is combined as a transition metal phosphide to have stable catalytic performance, and the titanium nitride is used as a conductor to have excellent conductivity. The lithium-carbon dioxide battery positive electrode catalyst with high catalytic activity, high conductivity and excellent stability is obtained through the synergistic effect of the two materials, and when the lithium-carbon dioxide battery positive electrode catalyst is applied to a lithium battery, higher energy density, longer cycle life and better rate capability are shown, so that the overall performance of the battery is improved, and the application prospect is wide. The requirements on high-performance batteries in the fields of electric automobiles, energy storage systems and the like are met.

The invention relates to the technical field of batteries, and discloses a secondary battery, a battery device and a power utilization device. The secondary battery comprises a positive electrode plate, the positive electrode plate comprises a positive electrode film layer, the positive electrode film layer comprises a positive electrode active material, the positive electrode active material comprises an inner core and a coating structure coating the surface of the inner core, and the coating structure comprises conductive phosphide and carbon. According to the secondary battery provided by the embodiment of the invention, by introducing the coating structure jointly formed by the conductive phosphide capable of assisting in improving the electronic conductivity and the carbon, the electronic conductivity of the positive electrode active material can be improved while the positive electrode active material has relatively high compaction density without increasing the content of a carbon layer; therefore, the volume energy density and the rate capability of the secondary battery can be improved.

The embodiment of the invention discloses a nano composite material and a preparation method, a use method and a device thereof, and the nano composite material is characterized by comprising a first nano particle and a second nano particle which are combined; the first nano-particles are transition metal nano-particles, and the second nano-particles are one or a combination of the following materials: lithium nitride nano-particles, lithium oxide nano-particles, lithium phosphide nano-particles, lithium selenide nano-particles and lithium sulfide nano-particles. The nano composite material can be subjected to magnetic regulation and control under low voltage, and high-speed and high-density electronic spin information storage is realized.

The invention relates to the technical field of catalyst processing, and discloses a high-activity transition metal phosphide electrolyzed water catalyst and a preparation method thereof, and the high-activity transition metal phosphide electrolyzed water catalyst comprises the following components by weight: 1-3 parts of cobalt chloride hexahydrate; 0.5 to 1.5 parts of ruthenium trichloride; 0.5 to 1.5 parts of iridium chloride (III) hydrate; 1-2 parts of copper sulfate pentahydrate; 2 to 4 parts of sodium hypophosphite; 1 to 2 parts of urea; 1 to 2 parts of glucose; 1-2 parts of sodium sulfide nonahydrate; 0.5 to 1 part of crystalline aluminum chloride; 50 to 100 parts of deionized water; and 0.1 to 0.5 part of hexadecyl trimethyl ammonium bromide. By introducing the plasma auxiliary treatment technology, the electronic structure of the catalyst is optimized, the conductivity and stability of the catalyst are improved, and the efficiency and durability of hydrogen production through water electrolysis are enhanced.

The invention discloses a fireproof coated pipe as well as a preparation method and application thereof, and relates to the field of organic composite materials. The fireproof coated pipe comprises a mother blank material and a liquid waterproof agent, wherein the mother blank material comprises a flame-retardant polymer matrix, coated graphite and a heat-conducting filler; the coated graphite is formed by expanded graphite and a coating layer on the surface, and the coating layer comprises a silicon source and a phosphorus source. The surface of the expanded graphite is coated with the silicon dioxide-phosphide composite material, so that the compatibility of the filler and a specific type of flame-retardant polymer matrix can be improved, the addition amount of the heat-conducting filler is reduced to ensure uniform dispersion, and synergistic multiplication of a flame-retardant function and optimization of a heat-conducting network are realized; meanwhile, a specific type of liquid waterproof agent is introduced and is extruded and blended with the master batch, so that the material is endowed with excellent waterproofness, meanwhile, the compatibility with other core properties is ensured, the waterproof coated pipe material with efficient heat conduction, flame retardance, waterproofness and mechanical strength is provided, and the application field is expanded.

The invention provides a high-activity catalyst for producing hydrogen by electrolyzing water as well as a preparation method and application of the high-activity catalyst. Specifically, the catalyst for producing hydrogen by electrolyzing water comprises: a carbon sintered body carrier; the active components are loaded on the surface and inside the carbon sintered body carrier, the active components comprise nickel molybdenum nitride (NiMoN), cobalt phosphide (CoP) and cerium oxide, and the catalyst has a porous structure. The catalyst is low in cost, high in activity and good in stability, the cost of hydrogen production through water electrolysis can be effectively reduced, and the hydrogen production efficiency is improved.

The present invention relates to a precursor for the production of an alloy used as a catalyst. The precursor comprises a metallic substrate, a layered structure comprising binders, metallic particles, and at least one metal oxide, metal phosphide, and / or metal sulfide, wherein the layered structure is arranged on the metallic substrate.

The invention relates to a layered composite electrode and a preparation method and application thereof. The electrode takes foamed nickel as a substrate layer, a layer of manganese phosphide is grown on the surface of the foamed nickel by adopting a hydrothermal method, then Co oxide is deposited on the surface of the manganese phosphide layer by adopting a cyclic voltammetry (CV) electrodeposition technology, and the CozO / MnyPx / NF electrode is obtained after cleaning and drying, and the catalyst on the surface of the CozO / MnyPx / NF electrode is of a nanosheet structure. Lattice distortion of the MnxP nano material is induced through a Co and O double-doping strategy, the electronic structure of the MnxP nano material is optimized, and the oxygen vacancy content is increased, so that the oxygen evolution performance of the catalyst is improved.

The invention discloses a residual oil hydrogenation carbon residue removal catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier and an active metal component, the carrier is aluminum oxide containing silicon and gallium; on the basis of the weight of the catalyst, the mass content of the carrier is 74%-83%, the content of the group VIII metal in terms of oxide is 2%-6%, and the content of molybdenum in terms of oxide is 15%-24%; the active metal component comprises Mo and a group VIII metal element; the Mo comprises + 5 valence Mo; the group VIII metal element exists in the catalyst in the form of metal phosphide. The catalyst has good hydrogenation carbon residue removal performance, can deeply remove polycyclic aromatic hydrocarbon and heterocyclic aromatic hydrocarbon in residual oil and reduce precursors of carbon residues, and has good stability.

The invention belongs to the technical field of electro-catalysis water decomposition, and relates to a self-supporting W-NiCoP / NF composite material and a preparation method and application thereof. Cobalt salt, terephthalic acid, acetic acid and foamed nickel are subjected to a first solvothermal reaction, and defect type Co-MOF / NF is obtained; immersing the defect type Co-MOF / NF into a tungstate solution, and then carrying out a second solvothermal reaction to obtain a defect type W-Co-MOF / NF precursor; and carrying out phosphating heat treatment on the defect type W-Co-MOF / NF precursor and a phosphorus source in an inert atmosphere to obtain the W-Co-MOF / NF composite material. According to the preparation method disclosed by the invention, the tungsten-doped nickel-cobalt bimetallic phosphide with rich defect structures is successfully constructed on the foamed nickel substrate through a step-by-step solvothermal and gas-phase phosphating strategy, so that organic combination of a bimetallic synergistic effect and defect engineering is realized; the prepared self-supporting composite material has more active sites, a better electronic structure regulation effect and better stability.

The invention relates to a negative active material and a preparation method thereof, a negative pole piece and a sodium ion battery. The negative electrode active material comprises a core-shell structure metal phosphide, and the core-shell structure metal phosphide comprises: an inner core, which comprises a bimetal phosphide derived from a Prussian blue compound; the shell layer covers at least part of the surface of the inner core, and the shell layer comprises metal phosphide. According to the negative electrode active material provided by the invention, through the synergistic effect of the bimetal phosphide derived from the Prussian blue compound in the inner core and the metal phosphide of the shell layer, the cycle performance and the rate capability of the battery are improved.

The invention belongs to the technical field of catalyst preparation, and provides an iron-nickel-phosphorus catalyst, a preparation method and application thereof, and a method for producing an aqueous hydrogen peroxide solution through electro-catalysis. The preparation method comprises the following steps: mixing nickel chloride, ferric chloride, elemental phosphorus and alcohol amine, and carrying out solvothermal reaction to obtain the iron-nickel-phosphorus catalyst. The iron-nickel-phosphorus catalyst containing iron phosphide, nickel phosphide and iron-doped nickel phosphide is obtained by taking a nickel salt, an iron salt, a phosphorus simple substance and a reducing solvent as raw materials and carrying out solvothermal reaction. The iron-nickel-phosphorus catalyst obtained by the invention can efficiently generate hydrogen peroxide through electro-catalysis in an electrolyte with the pH value of 5-9, so that the pH value range of the prepared hydrogen peroxide aqueous solution is wide, and the application range and field are wider; compared with selenium-doped cobalt phosphide in the prior art, the prepared hydrogen peroxide aqueous solution is wider in application.

The invention discloses a preparation method of a scaly manganese-doped phosphorus / molybdenum sulfide nanosheet array electrolyzed water catalyst and a product thereof, foamed nickel and the like are used as carriers, transition metal phosphide / sulfide grows on the basis of molybdenum oxide with poor intrinsic activity through hydrothermal synthesis and heat treatment methods based on transition metal molybdenum, and the scaly manganese-doped phosphorus / molybdenum sulfide nanosheet array electrolyzed water catalyst is prepared. The flaky manganese-doped phosphorus / molybdenum sulfide nanosheet array electrolyzed water catalyst is obtained, the overpotential of electrolyzed water of the catalyst is fully reduced by utilizing the synergistic effect of the manganese-doped phosphorus / molybdenum sulfide nanosheet array electrolyzed water catalyst, the stability is relatively high, and meanwhile, the problems of high preparation cost and complicated preparation process of transition metal molybdenum-based binary oxide in the prior art are effectively solved; and the positive effect is achieved on water electrolysis hydrogen production commercialization.

The invention discloses a foamed nickel loaded cross cluster-shaped multi-metal phosphide. NiCoFeP is obtained by compounding Ni2P, CoP and FeP. The invention further discloses a preparation method of the foamed nickel loaded cross cluster-shaped multi-metal phosphide. The preparation method comprises the following steps: preparing Ni (OH) 2 / NF which is vertically arranged on the surface of foamed nickel NF in situ through a nickel source and has a nano lamellar structure thickness of 30-40nm, then preparing NiCoFe-LDH / NF with a cross-cluster-shaped structure thickness of 160-180nm in situ through a cobalt source and an iron source, and finally, phosphorizing through a phosphorus source to prepare NiCoFeP / NF with a cross-cluster-shaped structure thickness of 30-50nm. When the catalyst is used as a water electrolysis OER / HER bifunctional catalyst, the OER overpotential is 210-220 mV under the condition that the current density is 50 mA cm <-2 >, and the HER overpotential is 140-150 mV under the condition that the current density is 20 mA cm <-2 >. When the catalyst is used as a complete water splitting catalyst, the current density can be 10mA cm <-2 > under the condition that the potential is 1.51 V; under the condition that the current density is 50mA cm <-2 >, the operation time is 96 hours, and the potential is 1.81 V; and compared with the initial potential, the potential is only reduced by 5%, namely, the performance attenuation can be ignored.

The present invention relates to a layered composite electrode and its preparation method and application. The electrode uses nickel foam as the base layer, grows a layer of manganese phosphide on its surface by hydrothermal method, and then deposits Co oxide on the surface of the manganese phosphide layer by cyclic voltammetry (CV) electrodeposition technology. After cleaning and drying, Co z O / Mn y P x The catalyst on the surface of the / NF electrode presents a nanosheet structure. The Mn x The lattice of P nanomaterials is distorted and its electronic structure is optimized, which increases the oxygen vacancy content and thus improves the oxygen evolution performance of the catalyst.

The invention discloses a preparation method of a transition metal phosphide catalyst anchored by using a carbon-based material as a carrier and application of the transition metal phosphide catalyst in the field of formic acid hydrogen production, and belongs to the technical field of formic acid hydrogen production catalysis. Transition metal phosphide is anchored on a carbon-based material carrier in situ by adopting a chemical reduction method to obtain a precursor, and the precursor is roasted and pickled in a nitrogen atmosphere to obtain the novel carbon-based material loaded transition metal phosphide catalyst. The catalyst has the advantages of simple preparation method, high catalytic efficiency, cheap non-noble metal raw materials and the like, shows the formic acid conversion rate of 100% and the hydrogen selectivity of 99% or above in the catalytic gas-phase formic acid hydrogen production reaction, and also has good catalytic stability.

The present invention belongs to the technical field of bioporous carbon preparation, and discloses a method for preparing multi-stage activated waste fruit and vegetable peel bioporous carbon and its application. Through the multi-stage steps of ultrasonic impregnation of waste fruit and vegetable peels with metal salts, initial carbonization activation, ultrasonic impregnation mixing, and co-pyrolysis activation of etchants and phosphides, a bioporous carbon with an ultra-high specific surface area (3149 m 2 / g), macropore volume (1.76cm 3 / g) of PBC. This represents 102.7% of the currently patented maximum specific surface area. Furthermore, the PBC significantly improves its adsorption performance for VOCs (represented by acetone and n-hexane vapor), reaching 1046 mg / g and 760 mg / g, respectively, representing increases of 138% and 132%, and exhibits excellent recyclability. This invention truly transforms waste into treasure, improving energy efficiency and possessing significant economic and social benefits.

The application discloses a kind of based on MXene / bimetallic phosphide / multi-polyphenol polymer multilevel flame-retardant photothermal material and preparation method, the material with nanosheet as base, by in-situ construction precursor and form bimetallic cobalt-nickel phosphide structure through phosphorization reaction, subsequently introduce tannic acid and dopamine on its surface, in-situ copolymerization is formed with the characteristics of multi-polyphenol photothermal layer of imitation mussel, to construct MXene / bimetallic phosphide / multi-polyphenol layer multilevel composite structure.The prepared photothermal material described in the application has excellent flame-retardant performance and photothermal conversion performance, can promote the formation of dense carbon layer during combustion, effectively inhibit heat release, smoke generation and toxic gas release;Under light condition, it can realize efficient photo-thermal conversion, and is used for preventing and removing ice in low-temperature environment.Adding the material as flame retardant to thermoplastic polyurethane can significantly improve the limiting oxygen index of the composite material and reduce the peak heat release rate.

This invention discloses a transition metal phosphide catalyst, its preparation method, and its application, belonging to the field of electrocatalysis technology. The process includes: firstly, dissolving nickel salt, lanthanum salt, urea, and ammonium fluoride in deionized water to synthesize a nickel-lanthanum layered hydroxide nanosheet precursor via a hydrothermal method; secondly, preparing a lanthanum-doped nickel phosphide catalyst using a phosphating reaction; and thirdly, utilizing a lanthanum doping strategy to modulate the electronic structure of nickel phosphide and improve its electrocatalytic reaction performance. This lanthanum-doped nickel phosphide material exhibits good catalytic activity when used to catalyze hydrogen evolution and sulfide ion oxidation reactions. In an integrated two-electrode electrolyzer for sulfide ion oxidation-assisted hydrogen production, it outputs 10 mA cm⁻¹. ‑2 This invention achieves the goal of producing hydrogen and high-value-added sulfur products with low energy consumption by requiring a relatively low voltage of 0.525 V at a current density. It has advantages such as simple preparation process, controllable operating conditions, and low raw material costs, possessing the potential for large-scale production and serving as a high-performance catalyst for electrocatalytic hydrogen production and sulfur ion oxidation reactions.

A catalytic electrode includes a nickel-based porous base material, and a plurality of catalytic alloy balls of nickel and another metal doped with elements, in which the another metal includes iron, the elements include C, F, and S, and the catalytic alloy balls are dispersed on the surface of the nickel-based porous base material. The catalytic electrode also includes a plurality of metal phosphide particles covering the nickel-based porous base material and the catalytic alloy balls, and the metal phosphide particle includes nickel phosphide, nickel iron phosphide, nickel cobalt phosphide, nickel copper phosphide, or nickel zinc phosphide.

A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH2O / PH2 is controlled, a final annealing process where hydrogen in mixed gas atmosphere is controlled to 50 volume % or more, an annealing separator removing process where water-washing is conducted using solution with inhibitor, a smoothing process where chemical-polished is conducted to control average roughness Ra, and an insulation coating forming process where insulation coating forming solution in which crystalline phosphide is included is applied.

The present invention provides a preparation method and application of a sulfur-containing molybdenum phosphide catalyst for the hydrogenation of medium- and low-temperature coal tar. The method uses ammonium heptamolybdate as a molybdenum source, diammonium hydrogen phosphate as a phosphorus source, and silicon-surface-modified alumina as a carrier. After equal volume impregnation and drying and calcination, the catalyst is first sulfurized and then hydrogenated in a fixed-bed reactor to reduce the severity of the activation process of the molybdenum phosphide and simultaneously form a sulfur-doped molybdenum phosphide active structure to obtain a sulfur-containing molybdenum phosphide catalyst. Medium- and low-temperature coal tar is then directly introduced into the original fixed-bed reactor to carry out a medium- and low-temperature coal tar full-fraction hydrogenation refining reaction. The preparation of the sulfur-containing molybdenum phosphide catalyst and the in-situ activation in the reactor of the present invention can be completed completely within the preparation and reaction system of the existing transition metal sulfide catalyst, greatly reducing the difficulty of preparing and using the phosphating catalyst. Moreover, the sulfur-containing molybdenum phosphide catalyst prepared by the present invention can be used completely based on the existing hydrogenation system and exhibits good hydrogenation activity.

The application discloses a kind of foam nickel load iron nickel bimetallic phosphide heterojunction catalyst and its preparation method and application, belong to electrocatalytic material technical field.The application is in situ grown by hydrothermal deposition in combination with low-temperature phosphorization process, and is prepared on foam nickel base Phosphide iron / Phosphide nickel heterojunction catalyst (Fe2P / Ni2P@NF).The prepared catalyst shows excellent performance in the electrocatalytic reduction of nitrate synthesis ammonia and high nitrate wastewater degradation.The preparation process of the catalyst of the application is simple, low in cost, and little to environmental pollution, and the self-supporting electrode prepared by integration can be directly applied to proton exchange membrane electrolytic cell, and has wide application prospect.

The application provides a titanium alloy surface antibacterial material and a preparation method and application thereof, and comprises a metal phosphide coating constructed on a titanium alloy substrate surface through a plasma immersion injection process and a chemical vapor treatment process and application of the metal phosphide coating in antibacterial medical materials. The coating of the technical scheme has good sterilization function and biocompatibility.