133 results about "Phosphide compound" patented technology

The invention discloses an oxidized graphene insulating heat-radiating coating. The oxidized graphene insulating heat-radiating coating is characterized by being composed of, by weight, 300-30 parts of resin, 1 part of oxidized graphene and 100-10 parts of resin curing agent, and the oxidized graphene is synthesized by adopting an improved Hummers method or phosphorylated oxidized graphene modified by phosphide. The oxidized graphene insulating heat-radiating coating is prepared by mixing oxidized graphene dispersion liquid or phosphorylated oxidized graphene dispersion liquid prepared after dispersing oxidized graphene in a dispersion liquid solvent with resin and resin curing agent. By the oxidized graphene insulating heat-radiating coating, the problem that insulativity and thermal conductivity of existing materials are difficult to realize at the same time is solved.

An electrode material of Fe¿CLi phosphate and its composite metal phosphate is electrode material of LiFePO4 and LiFePO4 / MxP in high density spherical shape with diameter of 2micro m. The electrode material of LiFePO4 and LiFePO4 / MxP can be prepared by low ¿C temperature controllable one ¿C stage atomizing process in short flow.

A thermodynamically stable metallic contact for binary oxide-, nitride-, carbide or phosphide-semiconductors and a method of its preparation, the contact is formed in a high temperature reaction in vacuum of a metal bi-layer with the binary semiconductor substrate. With a proper choice of the two metallic layers, each metal forms a single phase with only one of binary semiconductor elements. The resulting phases form distinct layers in a thermodynamically stable sequence.

A preparation method and an application of a graphene @ metal phosphide @ carbon nano composite material. The invention relates to preparation methods and applications of a graphene composite material and aims to solve the problems that metal phosphides in the prior art are poor and low in electric conductivity, are poor in reaction reversibility, and are liable to agglomerate and expand. The preparation method includes the steps of: 1) preparing metal oxide nanospheres; 2) preparing metal oxide @ carbon nanospheres; 3) preparing metal phosphite @ carbon nanospheres; and 4) performing high-temperature carbonization to prepare the graphene @ metal phosphide @ carbon nano composite material. The composite material is used as an anode material in lithium ion batteries or sodium ion batteries. The specific capacity of a CR 2025 button lithium ion battery, which is produced with the nano composite material as an anode material, is still higher than 1000 mAh/g after cycle for three times under current density of 0.2 A/g; and after cycle for 100 times, the specific discharge capacity of the battery is still higher than 700 mAh/g.

The invention provides a carbon/alumina composite carrier catalyst used for hydrazine decomposition reaction and a preparation method thereof. The catalyst showed in the formula is A/C-Al2O3, C-Al2O3 is the carbon/alumina composite carrier, and active constituent A is transition metal Mo, W, Fe, Co, Ni, Ru, Rh, Pd, Ir, Pt or carbonization, nitride and phosphide thereof; wherein, the content of the A is 2-40wt percent and the preparation temperature of the A is 300-900 DEG C. The invention has simple preparation, especially for the preparation of active species of the transitional metal carbonization, which uses H2 instead of CH4/H2 gas used in the past preparation to have direact reduction; the invention prevents carbon deposition on the surface of the carbonization from inactivating, thus being beneficial to acquire more catalytic active sites.

The invention discloses a nano particle/carbon fiber cloth composite electrode material and a preparation method thereof, comprises loading a transition metal salt in a micron-sized phenolic aldehyde-based activated carbon fiber treated with pre-nitric acid by an impregnation method, The mesoporous carbon fibers embedded with transition metal oxide/sulfide/nitride/phosphide nanoparticles can alsobe prepared by high temperature oxidation/sulfidation/nitridation/phosphatization. The nano-particle/carbon fiber cloth composite electrode material prepared by the invention has excellent electrochemical performance and can be applied in the fields of energy storage and conversion such as supercapacitor, lithium/sodium ion battery and electrocatalysis.

The invention discloses a cobalt phosphide/nitrogen and phosphorus doped porous carbon material, a preparation method and application thereof in an air electrode catalyst of a zinc-air battery. The preparation method comprises the following steps: adding an organic ligand into deionized water to obtain a ligand solution; adding metal zinc and cobalt salt into deionized water to obtain a metal saltsolution; slowly adding a metal salt solution into the ligand solution, and carrying out a reaction completely; and centrifuging the mixed solution, cleaning the obtained lower precipitate with deionized water for multiple times, carrying out freeze drying, and carrying out in-situ phosphatization/carbonization treatment on the sample. According to the invention, a bimetallic skeleton compound isused as a catalyst precursor; metal phosphide grows on the surface of the heteroatom doped carbon material through in-situ phosphorization; the cobalt phosphide/nitrogen-phosphorus doped porous carbon material is used as an air electrode catalyst of a zinc-air battery, and long-time and high-stability charge-discharge circulation can be realized. The cobalt phosphide/nitrogen-phosphorus doped porous carbon material is used as the air electrode catalyst of the zinc-air battery.

The invention relates to a low-temperature anti-fingerprint surface treating agent for a galvanized steel sheet and an environment-friendly surface treated galvanized steel sheet of which the surface is treated by use of the surface treating agent. The surface of the galvanized steel sheet does not contain chromium and does not need to be dried at a high temperature, and a surface treatment film can be formed on the surface under a low-temperature drying condition; the manufacturing process is environment-friendly and low in energy consumption; a composition (namely the surface treating agent) containing specific water-based resin and phosphide, specific organic silicon compound, titanium compound, vanadium compound and oxidic polyethylene particles is applied to the surface of the galvanized steel sheet and then dried at a low temperature ranging from 50 to 75 DEG C, and consequently, the obtained surface treated galvanized steel sheet has excellent properties such as excellent alkali resistance, solvent resistance, corrosion resistance, fingerprint resistance, coating adherence and the like.

The invention discloses a carbon-cobalt-molybdenum double-metal phosphide composite material and a preparation method thereof. The composite material is formed by a carbon skeleton with a dodecahedronstructure and MoP, CoP and CoMoP2 nano particles uniformly embedded in the carbon skeleton. The carbon skeleton with the dodecahedron structure is effectively kept, and the nano double-metal phosphide particles are uniformly embedded in a carbon substrate, so aggregation and falling of the nano particles can be prevented, stability of a catalyst is reinforced, high conductivity of the carbon substrate and the synergistic effect between the nano double-metal phosphide particles can also be developed, and catalytic activity of the phosphide is further reinforced. The carbon skeleton is capableof effectively improving the electrical conductivity of a whole catalyst material, thereby further improving catalytic performance thereof. The synergistic effect between various phases of the double-metal phosphide has a very important function to improve electrochemical catalytic performance. The nano double-metal phosphides are uniformly embedded in the carbon substrate, the aggregation and falling of the nano particles can be prevented, the stability of the catalyst is reinforced, and the composite material also has excellent electrochemical hydrogen evolution performance in an alkaline environment.

The invention relates to a multi-level metal phosphide as well as a preparation method and application thereof. The multi-level metal phosphide comprises metal foam framework and metal phosphide covering the surface of the metal foam framework. Through macropores with the average pore diameter of 50-500 microns are distributed among the metal foam framework, and macropores with the average pore diameter of 10-100 microns are distributed on the surface of the metal foam framework; the metal phosphide is cobalt phosphide or iron-cobalt bi-metal phosphide; the metal phosphide is of a sheet line structure similar to a woven bag. The multi-level metal phosphide provided by the invention has excellent performance of catalyzing hydrogen evolution reaction and oxygen evolution reaction at the sametime under an alkaline condition, so that the multi-level metal phosphide can be used as a bifunctional electrocatalyst and can also be used as a cathode and an anode to catalyze electrochemical water decomposition reaction; good stability is shown on hydrogen evolution reaction, oxygen evolution reaction and electrochemical water decomposition.

The invention discloses a preparation method of a cage-shaped nickel-iron bimetallic phosphide loaded nitrogen-doped porous carbon material. The preparation method comprises the following steps: cyanide ions are used as organic ligands, nickel ions and iron ions are used as metal sources; a ferronickel bimetallic Prussian blue compound growing on melamine is prepared through a coprecipitation method, the precursor is etched into a cage-shaped cube through one-step ammonia water, the cage-shaped cube and sodium hypophosphite are calcined at the temperature of 350 DEG C in an Ar atmosphere, andthe cage-shaped ferronickel bimetallic phosphide loaded nitrogen-doped porous carbon material is obtained. The PBA nano hollow cage-shaped particle group obtained by an ammonia water etching method can expose more active sites in the reaction process; the sintered and roughened porous carbon substrate with the melamine sponge three-dimensional structure not only can fix active sites to prevent agglomeration, but also can increase conductivity to accelerate charge transfer; metal phosphide is effectively formed through doping of phosphorus, the electronic structure around nickel and iron can beadjusted, and the charge transfer process can be accelerated.

The invention relates to a nickel phosphide compound with a multi-level pore structure and a preparation method and application thereof. The nickel phosphide compound comprises a metal foam frameworkand a nickel phosphide compound micron sheet covering the surface of the metal foam framework, through macropores with the average pore diameter of 50-500 microns are distributed among the metal foamframeworks, and macropores with the average pore diameter of 10-100 microns are distributed on the surfaces of the metal foam frameworks; and nano-pores are distributed in the nickel phosphide compound micron sheet. The nickel phosphide compound has a multi-level pore structure, the through macropores are beneficial to electrolyte transfer and gas diffusion, and the macropores and the nano-pores are beneficial to exposing more active sites and increasing the contact with an electrolyte so that the reaction rate is increased. The nickel phosphide compound can be used as a working electrode forelectrochemical decomposition of water to produce hydrogen, shows excellent hydrogen evolution performance under full pH, and has the advantages of low cost, excellent electro-catalytic hydrogen evolution performance and strong stability.

The invention provides a metal phosphide and heteroatom doped porous carbon composite material as well as preparation and application thereof. The porous carbon composite material is prepared by taking a biomass derived polymer and metal salt as raw materials. The composite material contains heteroatom functional groups and metal phosphide, metal forming the metal phosphide is one or more of Fe, Co, Ni, Cu, Rh, Ru, Mn and Mo, and the particle size of the metal phosphide is 1-80 nm. According to the metal phosphide and heteroatom doped porous carbon composite material, cheap and easily available substance derivatives are used as raw materials; the raw materials provide a carbon source, an oxygen source, a phosphorus source, a nitrogen source or a sulfur source, the metal phosphide and the heteroatom doped porous carbon material are combined under mild conditions, the preparation method is simple, and the obtained composite material has a large specific surface area, can provide a largenumber of sites with reaction activity, and has better performance in the fields of electrocatalysis, lithium-sulfur batteries, sodium batteries, supercapacitors and gas adsorption.

The invention discloses a small-particle-size metal phosphide nanoparticle/reduced graphene composite material and a preparation method thereof. The preparation method comprises the following steps: 1) preparing silica-coated metal oxide composite particles; 2) loading the composite particles onto graphene oxide to obtain a graphene oxide-based compound; 3) removing silica of the composite particles in the graphene oxide-based compound; and 4) carrying out phosphating treatment so as to obtain the small-particle-size metal phosphide nanoparticle/reduced graphene composite material. Metal phosphide in the composite material of the invention has a small particle size, in a range of 3 nm to 5 nm; and the phosphide nanoparticles are highly dispersed in reduced graphene, which is favorable forincreasing the exposure degree of active sites. The preparation method is simple in process, low in cost, and favorable for large-scale production.

The invention belongs to the field of electrocatalysts, and discloses a preparation method and application of a ruthenium-doped cobalt phosphide electrocatalyst for producing hydrogen by high-performance electrochemical decomposition of water. The method comprises the following steps: synthesizing a Co-MOF precursor with an open skeleton through a simple aging reaction, and further forming a RuCo-MOF catalyst with a mesoporous nanostructure through ion etching; and finally, carrying out low-temperature phosphating reaction to obtain the Ru-CoP hollow porous nanocube electrocatalyst. The series of metal-doped phosphides have relatively low charge transfer resistance and reaction potential barrier of hydrogen evolution reaction, and have excellent performance in electro-catalytic hydrogen evolution reaction. Meanwhile, the catalyst is low in cost, simple and convenient to operate, simple in process and excellent in catalytic performance, and provides basic application research for the material in the field of electrocatalysis.

The invention relates to a method for preparing metal phosphide as an electrode material and application of the metal phosphide, and belongs to the technical field of supercapacitor electrode materials. Elemental phosphorus, metal salt, and hexadecyl trimethyl ammonium bromide are adopted as raw materials. The method includes firstly preparing a reaction precursor from the raw materials, and thenperforming a hydrothermal reaction, suction filtration, drying and post-treatment processes so that the elemental phosphorus and the metal salt fully react to form the metal phosphide to serve as theelectrode material. By utilizing the simple hydrothermal synthesis method, the operation procedure is greatly simplified, and the percent of pass of products is increased. In addition, the supercapacitor using the metal phosphide prepared by the method as an electrode material has a higher surface active site, a larger specific capacitance, and good stability, the production efficiency of capacitors is greatly increased and the method is suitable for large-scale industrial production.

The invention provides a high-strength nucleated glass and a preparation method thereof. The nucleated glass comprises BAS, LAS component, fluoride, phosphide, rare-earth metal oxide, carbonate and necessary calcium and magnesium components. The compressive strength of the nucleated glass is more than 420MPa, the breaking strength is more than 100MPa, and other performances such as melt viscosity and thermal coefficient of expansion are also improved.

The invention belongs to the technical field of high-performance/high-energy-density lithium ion battery anodes, and particularly relates to an MXene/metal phosphide composite material, and an anode material and preparation and application thereof. The preparation method comprises the following steps: mixing and stirring a metal salt of a transition metal element, an MXene material and water, carrying out hydrothermal reaction, and drying to obtain an MXene/metal salt mixture; and in a protective atmosphere, carrying out heat treatment on the MXene/metal salt mixture and a phosphorus source toobtain the MXene/metal phosphide composite material. The invention also provides an MXene/metal phosphide-based composite battery anode material. The anode material comprises the MXene/metal phosphide composite material, a conductive agent and a binder, and the battery anode material has good long-cycle stability, high energy density and excellent rate capability, and can be applied to various fields.

The invention discloses a metal phosphide nanofiber and a preparation method thereof. The preparation method of the metal phosphide nanofiber includes the steps: 1) preparing spinning precursor solution; taking metal inorganic salt as a metal source, taking phytic acid as a phosphorus source, taking polyvinyl alcohol as a high-molecular polymer and taking water as a solvent and taking Triton-X-100as a surfactant; 2) acquiring a metal phosphide precursor nanofiber by electrostatic spinning; 3) performing heat treatment on the metal phosphide precursor nanofiber to obtain the metal phosphide nanofiber; 4) enabling the general formula of chemical components of the metal phosphide nanofiber prepared by the method to be MxPy, wherein M can be any one or any proportional combination of Co, Ni,Cu and Mo, P is phosphorus, and x and y are stoichiometric amounts of metal and phosphorus in metal phosphide. The preparation method has the advantages of simple flow, easiness in acquiring raw materials and no pollution. The prepared metal phosphide nanofiber can be used for catalysts, super-capacitors, lithium ion batteries and the like.

The invention belongs to the field of lithium metal battery negative electrode materials, and particularly discloses a high-flexibility 3D lithium-philic composite porous metal alloy current collector. The current collector comprises a high-flexibility 3D porous metal alloy current collector and a lithium-philic phosphide compounded on the 3D porous metal alloy current collector in situ, has abundant specific surface area, pore structure and excellent mechanical property, and can effectively reduce the local current density, promote the diffusion of electrons/lithium ions and inhibit the volume change; and a phosphide layer on the porous metal alloy current collector and a nanowire structure on the surface of the phosphide layer remarkably reduce lithium nucleation overpotential and induce lithium to be uniformly deposited/dissolved, the constructed lithium metal negative electrode can have excellent electrochemical performance, and coulombic efficiency and cycling stability are greatly improved. The invention further discloses a preparation method and application of the high-flexibility 3D lithium-philic composite porous metal alloy current collector.

The invention discloses a multi-metal non-oxide electrocatalyst as well as a preparation method and application thereof. Co-Fe layered double hydroxides are prepared from a metal organic framework ZIF-6 and ferrite under the protection of nitrogen through a coprecipitation method; a molybdate aqueous solution is added into an alcohol dispersion liquid of the Co-Fe layered double hydroxides, and Co-Fe-Mo layered double hydroxides are prepared by a coprecipitation method; finally, under the protective atmosphere, the Co-Fe-Mo layered double hydroxides and a phosphate solid are annealed through a tube furnace, and the Co-Fe-Mo phosphide is obtained; and solvothermal reaction is conducted on the Co-Fe-Mo layered double hydroxides and a selenium salt solution to obtain the Co-Fe-Mo selenide. The preparation method of the electrocatalyst is easy and convenient to operate, low in cost and rich in raw material source, the prepared multi-metal non-oxide electrocatalyst is derived from a metal organic framework structure, multi-metal atoms cooperate with one another, and the electrocatalytic activity of the multi-metal non-oxide electrocatalyst is effectively improved. When being directly used as an electrocatalyst for oxygen evolution reaction, the electrocatalyst shows relatively small overpotential, relatively low Tafel slope and good cycling stability.

The invention discloses a method for treating urea wastewater through nickel-based chemical looping oxidation. The method comprises the following steps: oxidizing a nickel-based material to a high valence state; and placing the nickel-based material in the oxidation state in a urea solution, and carrying out oxidative degradation on urea, wherein the nickel-based material comprises a nickel element-containing unitary or multielement hydroxide, oxide, phosphide, selenide, nitride, sulfide, an alloy material, a metal organic framework material, perovskite and a nickel element-loaded composite material. According to the method, the nickel-based material is used as a medium to oxidize urea, nitrogen and CO2 are generated with high selectivity, and secondary pollutants such as NO3<-> and the like are not generated; and the method for treating urea wastewater does not involve a microbial electrode, does not need catalytic enzyme, and is slightly influenced by environmental factors.

The invention discloses a preparation method of a high-performance nickel-cobalt phosphide hydrogen evolution catalyst and an efficient water electrolysis hydrogen evolution research, and belongs to the technical field of water electrolysis hydrogen production and new energy. The preparation method is characterized by comprising the steps of: phosphorizing foam metal substrates such as foam cobalt and foam nickel through a chemical vapor deposition method to prepare a non-noble metal phosphide Co2P/Ni2P porous conductive skeleton; and soaking the conductive skeleton in a solution of cobalt, nickel and other metal salts, and drying and phosphorizing the conductive skeleton again to obtain the non-noble metal phosphide hydrogen evolution catalyst with a nano-porous structure which shows excellent catalytic hydrogen evolution activity and stability in neutral and alkaline environments. The unique structural design greatly exposes the active sites of the metal phosphide, reduces the contact resistance among the components of the material, contributes to hydrogen adsorption and release and accelerates charge transfer among different component interfaces, thereby greatly reducing the overpotential of hydrogen reaction and assisting the development of the hydrogen energy industry and hydrogen fuel cells in China.