1509 results about "Phosphide" patented technology

Compounds, and oligomers of the compounds, are synthesized with cyclic amine ligands attached to a metal atom. These compounds are useful for the synthesis of materials containing metals. Examples include pure metals, metal alloys, metal oxides, metal nitrides, metal phosphides, metal sulfides, metal selenides, metal tellurides, metal borides, metal carbides, metal silicides and metal germanides. Techniques for materials synthesis include vapor deposition (chemical vapor deposition and atomic layer deposition), liquid solution methods (sol-gel and precipitation) and solid-state pyrolysis. Suitable applications include electrical interconnects in microelectronics and magnetoresistant layers in magnetic information storage devices. The films have very uniform thickness and high step coverage in narrow holes.

New thermoelectric materials and devices are disclosed for application to high efficiency thermoelectric power generation. New functional materials based on oxides, rare-earth-oxides, rare-earth-nitrides, rare-earth phosphides, copper-rare-earth oxides, silicon-rare-earth-oxides, germanium-rare-earth-oxides and bismuth rare-earth-oxides are disclosed. Addition of nitrogen and phosphorus are disclosed to optimize the oxide material properties for thermoelectric conversion efficiency. New devices based on bulk and multilayer thermoelectric materials are described. New devices based on bulk and multilayer thermoelectric materials using combinations of at least one of thermoelectric and pyroelectric and ferroelectric materials are described. Thermoelectric devices based on vertical pillar and planar architectures are disclosed. The advantage of the planar thermoelectric effect allows utility for large area applications and is scalable for large scale power generation plants.

The invention relates to a nitrogen-phosphorus double-doped carbon-coated transition metal diphosphide hydrogen evolution catalyst and a preparation method thereof. The nitrogen-phosphorus double-doped carbon-coated transition metal diphosphide is characterized in that the structural formula is MP2@NPC, a transition metal diphosphide MP2 is used as a core, nitrogen-phosphorus double-doped carbon NPC is used as a shell so that a core-shell structure is formed, the diphosphide has a nano-particle structure, the particle size is less than 50nm and good crystallinity is obtained. The composite catalyst has the electrocatalytic hydrogen evolution activity similar to that of the commercial platinum carbon and catalyst stability better than that of the commercial catalyst. The catalyst has a wide application prospect.

The invention discloses a transition metal phosphide/porous carbon anode composite material for a sodium-ion battery and a preparation method thereof. The composite material is formed by dispersive distribution of transition metal phosphide nano-particles in a porous carbon material. A preparation process of the composite material comprises the following steps of preparing a transition metal organic frame structure by transition metal salt and organic ligands through an in-situ growth method; respectively placing the transition metal organic frame structure and a phosphorus source on two ends of a tube furnace, heating the tube furnace, and meanwhile, circulating liquid inert gas into one end of the tube furnace with the inorganic phosphorus source to carry out heat treatment; and washing and drying a heat treatment product in sequence to obtain the composite material. The prepared transition metal phosphide/porous carbon anode composite material used as the anode material of the sodium-ion battery has high specific capacity, good rate capability, simple preparation method, low cost and wide industrial application prospect.

A catalyst for hydrotreating a hydrocarbon feed has been developed. The catalyst comprises a metal phosphide and promoter metal component as the catalytic component. At least a portion of the metal promoter component is deposited on the metal phosphide. The metal phosphide/promoter metal component combination is dispersed on a refractive inorganic oxide support. An example of this catalyst is where the metal phosphide is nickel phosphide, the promoter metal is molybdenum and the support is alumina. Methods of preparing the catalyst and hydrotreating processes using the catalyst are also described.

The invention provides a graphene/transition metal phosphide/carbon-based composite, a preparation method and a lithium ion battery negative electrode. Transition metal phosphide in the graphene/transition metal phosphide/carbon-based composite is a compound formed by transition metal iron, cobalt or nickel with phosphorus. According to the composite, graphene is taken as a matrix, and transition metal phosphide nanoparticles with good nanostructure are taken as a support, so that a graphene/transition metal phosphide composite is constructed; the composite is subjected to coating, filling, connecting and other modification with amorphous carbon, and the graphene/transition metal phosphide/carbon ternary nano-composite is obtained. The composite has high conductivity and excellent multilevel structure. When the lithium ion battery negative electrode is prepared from the graphene/transition metal phosphide/carbon-based composite, transition metal phosphide with higher specific capacity and good electrical conductivity is combined with graphene and a carbon material, so that the lithium ion battery negative electrode has the characteristics of high capacity, high rate and high cycling stability.

A method for preparing ethylene glycol from cellulose uses the cellulose as the feed for the reaction. The cellulose conversion is performed over catalysts which are composed of the metallic state, carbides, nitrides, or phosiphides of molybdenum or tungsten, and metallic cobalt, nickel, ruthenium, rhodium, palladium, iridium, and platinum of the group 8, 9, or 10 transition metals. The catalytic conversion of cellulose is conducted at 120 to 300° C. and hydrogen pressure 1 to 12 MPa under the hydrothermal conditions to achieve the high efficiency, high selectivity, and high yield of ethylene glycol. Compared to the existing method of preparing ethylene glycol from ethylene, the method, using the renewable raw material for the reaction, is friendly to the environment, and has high atom economy.

The invention discloses a method for protecting the negative electrode of a lithium sulfur battery. A lithium sulfur battery negative electrode protection additive layer is adhered to the surface of the anode of the lithium sulfur battery. An additive component forming the protection additive layer can be an inorganic compound or an organic compound; the inorganic compound is one or above two of metal oxides, nonmetal oxides, sulfides, phosphides, nitrides, borides and fluorides; and the organic compound is one or above two of ionic liquid molecules, amino acids, polycation electrolytes, polyanion electrolytes, cationic surfactants, polyoxyether and polythioether. The morphology of the liquid metal protection layer is dynamically changing, and does not physically shed or crack due to continuous dissolution and deposition of the lithium metal in order to effectively protect the negative electrode.

The invention belongs to the technical field of materials and energy sources and particularly provides a metal phosphide/graphite carbon hybrid material and a preparing method and application thereof. A cobalt base-metal organic framework (ZIF-67) is utilized as a template and directly reacts with red phosphorus through heating, and the cobalt phosphide/graphite carbon hybrid material with the strong interface coupling effect is prepared in an in-situ mode. The hybrid material is formed by uniformly distributing and embedding cobalt phosphide nanometer particles in a polyhedron graphite carbon matrix. When used in the oxygen evolution reaction as a catalyst, the hybrid material shows high catalytic activity. The synthetic method is easy to operate, low in production cost and capable of achieving large-scale preparation, and is a novel efficient and economic preparing method.

The present invention discloses one kind of ternary Zn-Ni-Mn phosphorizing solution and its preparation process. The ternary Zn-Ni-Mn phosphorizing solution consists of zinc ion, phosphate radical ion, nickel ion, manganese ion, chlorate radical ion, nitrate radical ion, fluorine ion, promoter A, additive B and complexing agent C in certain proportion. The present invention can form compact and homogeneous phosphide film with high base resistance and high corrosion resistance, and is suitable for the phosphorizing treatment of cathode before electrophoresis coating.

The invention belongs to the technical field of electrocatalysis and particularly relates to an iron-doped bimetal phosphide electrocatalyst and a preparation method and application thereof. A hydroxide precursor synthesized by a hydrothermal reaction undergoes a phosphating reaction at a low temperature to produce a Ni1CoxFeyP nanosheet array electrocatalyst. The bimetal phosphide has low chargetransfer resistance and a reaction barrier for a hydrogen evolution reaction and has superior performances in the electrocatalytic hydrogen evolution reaction. The catalyst has a low cost. The preparation method is easy to operate and has simple processes. The electrocatalyst has excellent catalytic performances and provides the basic application research for the material in the field of electrocatalysis.

The invention relates to a catalyst of supported metal phosphide, in particular to a process for preparing the catalyst of high dispersive supported metal phosphide. The catalyst is composed of two parts of active components and a carrier which can be represented by AP/Z or B2P/Z, wherein the A of the active components is Mo or W, the B of the active components is Ni or Co, and the Z of the carrier is Al2O3 or SiO2. The operation steps of the catalyst are that transient metal salt and mammonium dihydrogen phosphate are dissolved in deionized water according to the stoichiometric ratio of targeted phosphide, and simultaneously moderate hydroxy acid as chelating agent is added to get the impregnating solution for preparing supported transition metal phosphide. The porous carrier is immersed in the impregnating solution, and is rested, the procedure gains temperature and returns after the impregnating solution is dried, roasted and under the atmosphere of hydrogen gas, and finally the supported transition metal phosphide is made. The supported transition metal phosphide prepared by the preparation method has the advantages of high dispersion, simple and convenient operation, low cost, no pollution, good repeatability and easiness of large scale preparation.

The invention provides a nitrogen-doped porous vertical graphene nanowall array. A compact coating layer is formed by means of nickel hydroxide serving as a template and the self-assembly property of dopamine, then high-temperature carbonization is conducted to prepare a nitrogen-doped vertical graphene nanowall array material, in-situ functional modification is conducted on the basis, the compound functional material loaded with noble metal nanoparticles, noble metal alloy nanoparticles, metal oxides, metal sulfide, metal phosphide, conductive polymers and the like is obtained, and application in the fields of supercapacitors, lithium ion batteries, water decomposition, electrochemical catalysis, enzyme-free biosensors and the like is explored.

The invention discloses an acidified zeolite. The technical scheme is as follows: the acidified zeolite is composed of zeolite, attapulgite clay, magnesia, hydrochloric acid, instant sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate. The acidified zeolite materials are input into a mill and milled, and the milled powder is the acidified zeolite. The production method of acidified red mud adopts acidification before composite proportioning, thereby avoiding the chemical reaction between the sulfuric acid and the instant sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate; and the acidified zeolite can effectively remove ammonia, iron, fluorine, phosphides and micro pollutants in domestic sewage, and can be used for removing or recovering heavy metal ions and treating radioactive waste. The acidified rear has the characteristics of favorable thixotropy, favorable heat stability, favorable plasticity and favorable binding property, and is suitable for producing drying agents, adsorptive separation agents, molecular sieves, catalysts, defluorination soil improvers, deodorizers and firefighting products.

The invention provides a NiFeP bifunctional transition metal phosphide catalyst which has a nanosheet structure, wherein the nanosheet has a length of 2-5 m and a thickness of 100-200 nm; the invention also provides a preparation method and use of the NiFeP bifunctional transition metal phosphide catalyst. The NiFeP bifunctional transition metal phosphide catalyst provided by the invention has a microstructure that the nanosheet having a relatively large specific surface area is used as a water-splitting electro-catalyst, so that the catalyst has higher catalytic performance. The preparation method provided by the invention comprises the following steps: using ferronickel compound, ammonium fluoride and urea as raw materials; growing NiFe-LDH nanosheets on a substrate under heat preservation; and phosphating at a low temperature to obtain NiFeP transition metal phosphide nanosheets. The operation is simple; the production cost is low; and the prepared phosphide catalyst is applied to full hydrolysis in an alkaline environment and has excellent full hydrolysis catalyzing performance.

The invention discloses a transition metal compound (including phosphide, sulfide, selenide and nitride) nano array which is applied to low-energy-consumption electrochemical hydrogen production as a small-molecule electrooxidation and water-electricity reduction difunctional catalytic electrode and belongs to the fields of hydrogen energy and fuel cells. According to the transition metal compound nano array, the difunctional non-noble-metal array catalytic electrode is applied to small-molecule electrooxidation and water-electricity reduction simultaneously for the first time; an electrochemical oxygen evolution reaction is replaced with a small-molecule electrooxidation reaction low in oxidation potential, and a double-electrode electrolysis system based on the difunctional catalytic electrode is constructed; low-energy-consumption and stable electrochemical hydrogen production is achieved; and the transition metal compound nano array is applicable to large-scale industrial hydrogen production.

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.

Electrochemical structures with a protective interlayer for prevention of deleterious reactions between an active metal electrode and polymer electrolytes, and methods for their fabrication. The structures may be incorporated in battery cells. The interlayer is capable of protecting an active metal anode and a polymer electrolyte from deleterious reaction with one another while providing a high level of ionic conductivity to enhance performance of a battery cell in which the structure is incorporated. The interlayer has a high ionic conductivity, at least 10<-7 >S/cm, generally at least 10<-6 >S/cm, and as high as 10<-3 >S/cm or higher. The interlayer may be composed, in whole or in part, of active metal nitrides, active metal phosphides or active metal halides. These materials may be applied preformed, or they may be formed in situ by conversion of applied precursors on contact with the active metal anode material.