289 results about "Phosphide" patented technology

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 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 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 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 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 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.

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.

A method of forming a metal phosphide film on a substrate using a cyclical deposition process includes contacting the substrate with a vapor-phase metal precursor, contacting the substrate with a vapor-phase halogenating agent, and contacting the substrate with a vapor-phase phosphorus-containing precursor. A method of filling a gap includes placing a substrate in a reaction chamber, wherein the substrate comprises a gap; forming a flowable metal halide on the substrate to fill the gap; and converting the flowable metal halide into a metal phosphide.

The invention discloses a residual oil hydrodenitrification catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier and active metal components, wherein the active metal components comprise Mo and group VIII metal elements; the Mo comprises + 5 valence Mo; the group VIII metal element exists in the catalyst in the form of metal phosphide. The hydrodenitrification catalyst is high in active metal utilization rate, good in carbon deposition resistance and high in denitrification capacity, and has relatively high denitrification activity and good stability when being used for a residual oil hydrodenitrification reaction.

The application belongs to the technical field of new energy materials and electrochemical catalysis, and provides an oxygen vacancy-rich nitrogen-doped nickel phosphide / cerium oxide composite catalyst, a preparation method and application thereof. A foam nickel is used as a working electrode, a platinum sheet is used as a counter electrode, and a Hg / HgO electrode is used as a reference electrode. In an electrolyte solution containing a nickel salt and a cerium salt, electrodeposition is performed to obtain a precursor. The precursor includes the foam nickel and cerium and nickel deposited on the foam nickel. The precursor is soaked in a tannic acid solution to obtain an impregnated precursor. Ammonium hypophosphite is placed upstream, and the impregnated precursor placed downstream is subjected to phosphorus nitride doping treatment to obtain the oxygen vacancy-rich nitrogen-doped nickel phosphide / cerium oxide composite catalyst. The obtained oxygen vacancy-rich nitrogen-doped nickel phosphide / cerium oxide composite catalyst exhibits excellent electrocatalytic performance for methanol oxidation reaction (MOR) and can be used as a high-efficiency anode catalyst for a direct methanol fuel cell (DMFC).

The application discloses a method for preparing lithium iron phosphate by taking ferrous phosphide as raw material and a product, relates to the technical field of green and sustainable development of the steel industry and new energy materials, and comprises the following steps: preparing ferrous phosphide by taking steel slag and phosphorus tailings as raw materials, using nitric acid to leach the ferrous phosphide, controlling the pH of leaching to be 2.5-3, and controlling the leaching time to be 2-5 hours; adding phosphoric acid in the leaching solution, controlling the Fe / P molar ratio in the solution after adding the phosphoric acid to be 0.6-0.8; filtering the leaching solution, and roasting the filtered precipitate in an air atmosphere at 700-900 DEG C for 10-12 hours; mixing the roasted product with lithium hydroxide and glucose, and mixing the raw materials according to the molar ratio of FePO4:LiOH.H2O:C6H 12 O6 being 1:1.06:0.18-0.21; pressing the mixed raw materials into blocks, and roasting the blocks under an inert atmosphere at 700 DEG C for 10 hours, so that lithium iron phosphate is obtained. The application realizes bidirectional green development of the steel industry and the new energy industry by preparing lithium iron phosphate materials by using steel slag recovery products.

To provide tin phosphide with reduced ignition properties. [Solution] The tin phosphide is such that when 3 mL of tin phosphide is placed on an insulating plate and a cerium-iron spark is applied to the tin phosphide 1 to 50 times from a distance of 5 mm, no ignition is observed, the ratio of tin to phosphorus (Sn / P by weight) is 8.4 to 13.3, and it substantially does not contain elemental phosphorus and / or phosphorus-rich tin phosphide.

The invention discloses a preparation method of a nickel phosphide foam net with high mechanical stability and application of the nickel phosphide foam net in water electrolysis for hydrogen production. The preparation method comprises the following steps: loading raw materials; cleaning the atmosphere and introducing protective gas; calcining to obtain a nickel phosphide foam net with high mechanical stability; and assembling the water electrolysis hydrogen production device. According to the preparation method, the cost and time in the preparation process are reduced by reducing the calcination temperature and shortening the calcination time, nickel phosphide is formed on the surface of the foam net, meanwhile, metal nickel in the foam net is reserved, and the nickel phosphide foam net shows high catalytic activity and high mechanical stability; compared with the prior art, the method has obvious technical advantages.

The invention provides a high-dispersion type molybdenum phosphide catalyst and a preparation method and application thereof, and belongs to the technical field of formic acid preparation through carbon dioxide reduction. The preparation method comprises the following steps: stirring and dispersing ammonium molybdate, ammonium dihydrogen phosphate, a carbon carrier and melamine in water to obtain a white turbid liquid, carrying out ultrasonic treatment on the turbid liquid, drying, and pyrolyzing in an inert atmosphere to obtain the high-dispersion type molybdenum phosphide catalyst. A one-step pyrolysis method is adopted, the preparation process is simple, and preparation raw materials are convenient and easy to obtain. The catalyst disclosed by the invention is used for reducing carbon dioxide to prepare formic acid at low temperature and low pressure, has the characteristics of high reaction efficiency, high product selectivity and the like, can exceed the catalytic performance of most non-noble metals, and enriches the application field of efficiently reducing carbon dioxide at low temperature and low pressure by the non-noble metals.

The invention discloses a catalyst for preparing 1, 3-propylene glycol through glycerol hydrogenation and a preparation method and application of the catalyst. The catalyst comprises a carrier, an active component loaded on the carrier and an auxiliary, the active component is Pt, a phosphide of Pt and a phosphide of W, and the auxiliary agent is La or Ba; according to the weight ratio of 100%, the loading capacities of the Pt, the W, the phosphorus and the auxiliary agent are respectively as follows according to the mass content of the carrier: 1-4% of Pt, 3-15% of W, 0.1-5% of phosphorus and 0.1-0.8% of the auxiliary agent. The catalyst is high in stability, is suitable for hydrogenation production of 1, 3-propylene glycol from a glycerin aqueous solution, is high in product selectivity and yield, can reduce the components of the catalytic reaction, is mild in reaction conditions, meets the requirements of green chemical industry, and has great economic values and industrial application prospects.

The application discloses high-entropy metal phosphide nanowires and a preparation method and application thereof. The preparation method comprises the following steps: high-temperature treatment is performed on carbon nanotubes, the high-temperature treated carbon nanotubes and metal chlorides are mixed and ball milled to obtain a mixture, the metal chlorides comprise chlorides of more than five metal elements; in a protective atmosphere, the mixture is placed in a reaction chamber, heated to perform a first reaction, and then cooled; a phosphorus source and a product obtained in the first reaction are respectively placed in different areas of the reaction chamber, heated to perform a second reaction, and high-entropy metal phosphide nanowires are prepared. The preparation method of the high-entropy metal phosphide nanowires provided by the application utilizes carbon nanotubes as a template to construct, fills multiple chlorides, and then reacts with a phosphorus source under high-temperature conditions to obtain one-dimensional high-entropy metal phosphide, and the prepared high-entropy metal phosphide nanowires can be used as an electrocatalyst with excellent activity and stability, applied to electrocatalytic water splitting, and has a wide prospect.

The application discloses a high-thermal-stability high-nickel ternary material, a preparation method and application. The application utilizes the characteristic that the high-nickel ternary material is sensitive to water, reconstructs a layer of NiOOH on the surface of the high-nickel ternary material, changes the NiOOH coating layer into various transition metal oxyhydroxides by means of an ion exchange reaction, constructs a layer of phosphide on the surface of the transition metal oxyhydroxide through a phosphorization reaction, finally, decomposes the various transition metal oxyhydroxides into high-entropy oxides by means of high-temperature calcination, and then obtains a high-nickel ternary material coated with double layers; the high-entropy oxides have high thermal stability and lithium ion conductivity. In-situ construction of the high-entropy oxide coating layer can not only improve the thermal stability of the high-nickel material, but also help to improve the rate performance and cycle performance of the high-nickel ternary material. The phosphide has strong conductivity, and in-situ coating of the phosphide on the surface of the high-entropy oxide can form a complementary advantage with the high-entropy oxide, and further improve the rate performance of the high-nickel ternary material.

The invention provides a carbon-supported ruthenium-doped iron-based phosphide electrocatalyst as well as a preparation method and application thereof, and belongs to the field of electrocatalytic materials. The method comprises the following steps: mixing ruthenium trichloride, ferric trichloride and phenylphosphonic acid, and carrying out a coordination reaction to obtain an MOFs precursor; performing ultrasonic washing and purification on the obtained MOFs precursor to obtain a pure product; and placing the obtained pure product in a tubular furnace for calcination and carbonization to obtain the carbon-supported ruthenium-doped iron-based phosphide electrocatalyst. The invention also provides the carbon-supported ruthenium-doped iron-based phosphide electrocatalyst obtained by the preparation method. The carbon-supported ruthenium-doped iron-based phosphide provided by the invention has excellent electro-catalytic performance, and the overpotential for realizing electro-catalytic reduction hydrogen evolution is relatively low.

This invention relates to the field of lithium-ion battery technology, specifically to a composite electrode material and its preparation method. The preparation method includes the following steps: using tin, red phosphorus, and lithium salt in a molar ratio of 3.5–3.9:3:0.5–0.1 as raw materials, ball milling is performed in an inert gas to obtain lithium-doped tin phosphide material; the lithium-doped tin phosphide material and carbon nanotube material are mixed uniformly, and calcined under a protective atmosphere to construct a carbon conductive network on the surface of the lithium-doped tin phosphide material to obtain modified tin phosphide material; the modified tin phosphide material is mixed uniformly with additives to obtain the composite electrode material. This invention achieves multi-dimensional modification of tin phosphide anode material through stepwise synergistic processing, solving the technical problem of decreased electrochemical performance of existing tin phosphide anode materials due to volume expansion and lithium loss.

This invention discloses a method for preparing a metal phosphide catalyst. The method involves uniformly mixing a carbon-containing precursor with a phosphorus-containing precursor solution and then drying the mixture to obtain a solid product. The solid product is then pyrolyzed under an inert atmosphere. The pyrolyzed solid product is washed and dried to obtain a phosphorus-doped carbon material. A metal salt solution is then uniformly mixed with the obtained phosphorus-doped carbon material, dried, and reduced under a hydrogen-containing gas atmosphere to obtain the metal phosphide catalyst. Thus, this invention prepares phosphorus-doped porous carbon through the pyrolysis of a carbon precursor and a phosphorus-containing precursor. This utilizes the binding effect of phosphorus functional groups with metal ions to inhibit the migration and aggregation of metal particles under high-temperature conditions, effectively preventing metal particle sintering and improving the yield of the target catalytic product.

The application discloses a kind of nano high-entropy phosphide / carbon composite material and preparation method thereof, comprising the following operating steps: (1) phosphorus-containing resin is soaked into acid solution to adjust the pH of phosphorus-containing resin, and is crushed after drying;(2) water is added to stir thoroughly, to obtain a mixture, Fe salt, Co salt, Ni salt, Cu salt and Mo salt solution are mixed uniformly and then added to the mixture, denoted as M + Resin;(3) enter alkaline substance grinding, heat treatment, after reaction is finished, to obtain nano high-entropy phosphide / carbon composite material.The method of the application uses phosphorus-containing resin as raw material, and the used resin is green and environmentally friendly, low in price, low in raw material and preparation cost;The method of the application is simple in operation, and the particle size of the prepared nano high-entropy phosphide / carbon composite material reaches nanoscale, and the particle size is controllable.

The application discloses a preparation method of a supported high-dispersion molybdenum phosphide catalyst, and comprises the following steps: S1, dissolving molybdenum acetylacetonate and ammonium hypophosphite in an aqueous solution of N,N-dimethylformamide to obtain an impregnation solution; S2, immersing a carrier in the impregnation solution, then drying and reducing to obtain a supported molybdenum phosphide catalyst. The hydrogenation activity and the hydrodesulfurization activity of the prepared molybdenum phosphide catalyst are higher than those of MoP catalysts prepared by a temperature programmed reduction method and a molybdenum trioxide reduction method with ammonium hypophosphite, and the molybdenum phosphide catalyst has very high hydrodesulfurization activity on p-benzothiophene.

The invention relates to an automatic high-strength bolt dephosphorization cleaning device and method, and relates to the technical field of bolt machining equipment.The automatic high-strength bolt dephosphorization cleaning device comprises a cleaning conveying box, a conveying assembly is arranged in an inner cavity of the cleaning conveying box, a floating assembly is arranged above a discharging hopper, a cleaning assembly is arranged in an inner cavity of a cleaning tank, and a heating and mixing assembly is arranged on the right side of the cleaning tank; according to the device, high-frequency small-amplitude vibration is generated through the cleaning conveying box, the floating assembly is matched to achieve the matching mode of up-down reciprocating motion and vibration, oil stains and initial phosphides attached to the surfaces of the bolts are effectively stripped, and the cleaning coverage degree of the pretreatment stage is improved; according to the cleaning device, high-speed rotation is achieved in cooperation with the driving structure, centrifugal force is generated, surface agent attachment boundary layers are broken, meanwhile, cleaning liquid containing a phosphorus removal agent is heated to the high temperature through the heating assembly, then the cleaning assembly sprays and flushes the interior of the roller in an all-around mode, and the problems that bolt discharging is stuck and stubborn phosphides are difficult to remove are solved.