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30 results about "Transition metal hydride" patented technology

Transition metal hydrides are chemical compounds containing a transition metal bonded to hydrogen. Most transition metals form hydride complexes and some are significant in various catalytic and synthetic reactions. The term "hydride" is used loosely: some so-called hydrides are acidic (e.g., H₂Fe(CO)₄), whereas some others are hydridic, having H⁻-like character (e.g., ZnH₂).

Novel ammonia borane composite material for hydrolysis hydrogen production

InactiveCN101837953AImprove the kinetic performance of hydrolysis hydrogen releaseSmall particle sizeHydrogen productionMetal chlorideAlkaline earth metal
The invention relates to a novel ammonia borane composite material, in particular to the novel ammonia borane (NH3BH3) composite material used for inducing the hydrolysis of an ammonia borane compound to produce hydrogen under a mild condition. The novel ammonia borane composite material comprises hydrogen storage materials which have micron, submicron and nanometer particle sizes and are obtained by using an inducer (metal hydride MHx or a salt) and an ammonia borane mixture as initial raw materials. The metal hydride MHx comprises one of or a combination of a plurality of types of alkali metal hydride, alkaline earth metal hydride, transition metal hydride and rear earth metal hydride; and the salt comprises one of or a combination of a plurality of types of metal chloride and sulfate. The initiative phase component molar ratio of the inducer to the ammonia borane (NH3BH3) is (2-0.02):1. The novel ammonia borane composite material greatly improves the dynamics performance of hydrolysis hydrogen discharge of the ammonia borane, and has a high hydrogen discharge amount and a high hydrogen production rate when hydrolyzed under the mild condition.
Owner:SICHUAN UNIV

Solid-phase synthesis method of Mg(BH4)2 hydrogen storage material

The invention discloses a solid-phase synthesis method of a Mg(BH4)2 hydrogen storage material. Magnesium boride or a mixture of magnesium boride and magnesium hydride is used as a starting material to carry out a mechanochemical reaction in high pressure hydrogen atmosphere, with a catalyst selected from one or more of a transition metal, a transition metal halide, a transition metal hydride and a transition metal oxide, so as to prepare the Mg(BH4)2. The preparation method of the Mg(BH4)2 hydrogen storage material of the invention has advantages of simple synthetic method, easily controlled reaction process, low cost and no organic pollution.
Owner:ZHEJIANG UNIV

Ring-opening polymerization of cyclic esters, polyesters formed thereby, and articles comprising the polyesters

Cyclic esters are polymerized in the presence of a catalytic amount of a Group 4 transition metal hydride. The method is capable of producing high molecular weight polyesters with low polydispersities. These high molecular weight polyesters exhibit improved mechanical properties and are useful in a variety of product applications.
Owner:UNIV OF CONNECTICUT

Scaffold Materials-Transition Metal Hydride Complexes, Intermediates Therefor and Method for Preparing the Same

The present invention relates to substances which can be applied to the technical fields of gas storages, polymerization catalysts and optical isomers, their intermediates, and processes for preparing the same, which is characterized in that 1) possible disintegration of structure of the scaffold material (SM) is impeded, and 2) they are prepared by a simple manufacturing system as compared to the substances conventionally suggested in the application field. Specifically, it relates to scaffold material-transition metal hydride complexes comprised of scaffold material (SM) and transition metal hydride (M1H(n-1)) which is chemically bonded to the functional groups formed on the scaffold material, SM-transition metal halide complex and SM-transition metal ligand complex as the precursors, and a process for preparing the same. The SM-transition metal hydride complex according to the present invention is a substance for hydrogen storage which adsorbs hydrogen via Kubas adsorption. The complex according to the invention can store high capacity of hydrogen with safety and reversibility, while disintegration of its structure does not occur even with repeated adsorption-desorption of hydrogen.
Owner:HANWHA CHEMICAL CORPORATION

Amorphous magnesium-aluminum-base composite hydrogen storage material and preparation method thereof

The invention discloses an amorphous magnesium-aluminum-base composite hydrogen storage material and a preparation method thereof. The amorphous magnesium-aluminum-base composite hydrogen storage material is prepared from an amorphous Mg17Al12 matrix and a transition metal hydride in a mass ratio of 100:(0.5-10), wherein the transition metal hydride is one or more of TiH2, ZrH2 and ScH2. The preparation method comprises the following steps: a) in an inert atmosphere, uniformly mixing raw materials Mg powder and Al powder according to the proportioning of the Mg17Al12, and preparing amorphous Mg17Al12 matrix powder by low-temperature ball milling; and b) carrying out mechanical ball milling on the prepared amorphous Mg17Al12 matrix powder and transition metal hydride powder under the protection of the inert gas to obtain the amorphous magnesium-aluminum-base composite hydrogen storage material. The composite hydrogen storage material has excellent medium / low-temperature hydrogen absorption / desorption properties.
Owner:ZHEJIANG UNIV

More advanced preparation method of organic-transition metal hydride complexes containing aryl group or alkyl group as hydrogen storage materials

The present invention relates to a more advanced preparation method of organic-transition metal hydride as a hydrogen storage material, precisely a more advanced preparation method of organic-transition metal hydride containing aryl or alkyl group that facilitates safe and reverse storage of massive amount of hydrogen.The present invention relates to a preparation method of an organic-transition metal hydride comprising the steps of preparing a complex reducing agent composition by reacting alkali metal, alkali earth metal or a mixture thereof and (C10˜C20) aromatic compound in aprotic polar solvent; and preparing organic-transition metal hydride by reacting the prepared complex reducing agent composition and organic-transition metal halide.The method of the present invention has advantages of minimizing the numbers and the amounts of byproducts by using a complex reducing agent and producing organic-transition metal hydride safely without denaturation under more moderate reaction conditions.
Owner:HANWHA CHEMICAL CORPORATION

Advanced preparation method of organic-transition metal hydride complexes as hydrogen storage materials

The present invention relates to an advanced preparation method of organic-transition metal hydride used as hydrogen storage materials, the method including: preparing organic-transition metal-aluminum hydride complexes by reacting the organic-transition metal halide with metal aluminum hydride compounds; and preparing the organic-transition metal hydride by reacting the organic-transition metal aluminum hydride complexes with Lewis bases.Since the preparation method of the organic-transition metal hydride according to the present invention does not use catalysts, it has advantages that it does not cause problems due to poisoning and can prepare the organic-transition metal hydride at high yield under less stringent conditions. The hydrogen storage materials containing the organic-transition metal hydride prepared from the preparation method can safely and reversibly store a large amount of hydrogen.
Owner:HANWHA CHEMICAL CORPORATION

Hydrogen-containing transition metal oxide, preparation method and primary battery

A hydrogen-containing transition metal oxide is characterized in that the hydrogen-containing transition metal oxide has a structural formula of ABOxHy, wherein A is one or more of alkaline earth metal elements and rare earth metal elements, B is one or more of transition metal elements, and the value of x ranges from 1 to 3, and the value of y ranges from 0 to 2.5. The present invention further provides a primary battery using the hydrogen-containing transition metal oxide as an electrode and a preparation method of the hydrogen-containing transition metal oxide.
Owner:TSINGHUA UNIV

Binary and ternary transition metal hydrides as well as preparation method and application thereof

The invention discloses binary and ternary transition metal hydrides, a preparation method and an application of the binary and ternary transition metal hydrides as an efficient and stable electro-catalytic hydrogen evolution catalyst. The catalyst has the molecular formula being HxMaRbYcO3, wherein M, R and Y are two or three different transition metals, the value of x ranges from 0.01 to 1, and the sum of a, b and c is equal to 1. M, R and Y are any two or three elements of scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, niobium, molybdenum, rhodium, osmium, tungsten, tantalum and iridium. HxMaRbYcO3 as a water electrolysis catalyst has electrochemical performance in an acidic electrolyte equivalent to the performance of a commercial carbon-supported platinum catalyst, has very high stability and is prepared with a simple preparation process and easy to amplify. Therefore, HxMaRbYcO3 can serve as a substitute of the carbon-supported platinum catalyst, and the hydrogen production cost is effectively reduced.
Owner:WUHAN HYNERTECH CO LTD

Method for preparing MAX-phase high-entropy ceramic material

The invention provides a method for preparing an MAX-phase high-entropy ceramic material. The method comprises the following steps: 1) preparing composite powder: mixing transition metal powder, transition metal hydride powder, corresponding transition metal carbide powder and aluminum powder to prepare the composite powder; 2) dispersing the composite powder obtained in the step 1) in a grinding aid, performing ball milling to obtain mixed slurry, performing vacuum drying, and sieving; (3) putting the mixed powder obtained in the step (2) into a steel mold, and carrying out pre-pressing forming to obtain a ceramic blank; and 4) placing the ceramic blank obtained in the step 3) in a graphite mold, and carrying out pressure sintering under a vacuum condition at a loading pressure of 45-55 MPa and a temperature of 1300-1500 DEG C to obtain the MAX-phase high-entropy ceramic. The invention also provides the MAX-phase high-entropy ceramic material prepared by the method, and the MAX-phase high-entropy ceramic material has excellent mechanical properties.
Owner:HEFEI UNIV OF TECH

Preparation method of graphene-loaded nanosheet transition metal hydride and hydrogen storage material

The invention relates to the field of hydrogen storage materials, and discloses a preparation method of a graphene-loaded nanosheet transition metal hydride and a hydrogen storage material.The preparation method of the nanosheet transition metal hydride comprises the following steps that under protection of inert gas, mixing a transition metal chloride, lithium hydride, graphene and an organic solvent, heating reacting, separating to obtain a solid substance, drying the solid substance to obtain the nanosheet transition metal hydride. According to the graphene-loaded transition metal hydride catalyst, the hydrogen absorption and desorption behaviors of a hydrogen storage material can be remarkably improved, the hydrogen absorption and desorption working temperature can be reduced, the cycle performance can be improved, byproducts can be easily removed in the reaction process, industrial production. and meanwhile, the transition metal hydride is prevented from being oxidized.
Owner:ZHEJIANG UNIV

Catalyst for ammonia synthesis reaction

The invention relates to a transition metal hydride catalyst for ammonia synthesis. The transition metal hydride catalyst comprises a transition metal hydride and a carrier. The catalyst for ammonia synthesis has an excellent catalytic activity, especially under low temperature and low pressure conditions (1 bar and below 300 DEG C).
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Preparation method of efficient and stable bifunctional catalyst and application of efficient and stable bifunctional catalyst

The present invention discloses a preparation method of a binary and ternary transition metal hydride catalyst and application of the binary and ternary transition metal hydride catalyst in an electro-catalysis hydrogen evolution and a fuel cell. The molecular formula of the catalyst is Pt / HxMaRbYcO3, wherein M, R, Y are three different types of transition metal, x is 0.01-1, 0<=a<1, 0<=b<1, 0<=c<1, a+b+c=1, and the mass content of the Pt in the catalyst is 0.01-20%. The Pt / HxMaRbYcO3 is taken as an electrolytic water catalyst, has the electrochemical performance in an acid electrolyte being equivalent to the commercialized carbon-supported platinum catalytic performance, has very high stability, and is simple in manufacturing process and easy to amplify so that the Pt / HxMaRbYcO3 can be taken as a substitute of the carbon-supported platinum catalyst to effectively reduce the hydrogen production cost. The bifunctional catalyst with electro-catalysis hydrogen evolution and oxygen reduction reaction has never been reported.
Owner:WUHAN HYNERTECH CO LTD

Preparation method of high-purity nano-powder Mg2-xSiTMx thermoelectric materials

Disclosed is a preparation method of high-purity nano-powder Mg2-xSiTMx thermoelectric materials, which belongs to the field of thermoelectric material preparation and particularly relates to a technical scheme of preparation method of high-purity nano-powder Mg2-xSiTMx thermoelectric materials through a microwave reaction method. The preparation method is characterized in that magnesium hydride(MgH2) power, silicon powder and transition metal hydride TMHy powder are reacted under the protection of flowing argon air in a microwave oven, a decomposition temperature of the magnesium hydride powder and a decomposition temperature of the TMHy powder are both under 350 DEG C, reactants are easy to be decomposed and distributed in a substrate uniformly during the reaction process, the strong reducibility of the reactants can inhibit a substrate surface from absorbing oxygen and avoid further forming of oxidation products, and high-purity nano-powder Mg2-xSiTMx powder with a purity of not less than 99.95% is obtained. According to method, the process is simple, efficiency is high, energy is saved, and the prepared Mg2-xSiTMx thermoelectric materials have good thermoelectric performance.
Owner:TAIYUAN UNIV OF TECH

Ring-opening polymerization of cyclic esters, polyesters formed thereby, and articles comprising the polyesters

Cyclic esters are polymerized in the presence of a catalytic amount of a Group 4 transition metal hydride. The method is capable of producing high molecular weight polyesters with low polydispersities. These high molecular weight polyesters exhibit improved mechanical properties and are useful in a variety of product applications.
Owner:UNIV OF CONNECTICUT

Hydrogen storage material of coordinated alanate, and preparation method

InactiveCN101049910ADoes not reduce effective hydrogen storage componentsEffective refinementMultiple metal hydridesHydrogen atmosphereALUMINUM HYDRIDE
This invention provides a method for preparing transition metal doped coordinated aluminum hydride hydrogen-storage material. The hydrogen-storage material is composed of matrix material and catalyst. The method adopts selective multi-step synthesis strategy, which can increase the capacity as well as hydrogen absorption / desorption dynamics of the hydrogen-storage material. The method comprises: adopting transition metal powder, transition metal hydride or Ti-Al alloy as the catalyst during doping, and ball-milling in inert protective atmosphere or reactive hydrogen atmosphere. The method has such advantages as simple process, easy operation, and can largely increase the capacity as well as hydrogen absorption / desorption dynamics of the hydrogen-storage material. The prepared hydrogen-storage material has such advantages as high hydrogen storage capacity, high cyclic stability, appropriate operation temperature and no impurity gas pollution.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Incorporating transition metal-facilitated photocatalytic systems for efficient hydrogen evolution

It is an object of the present invention to provide a method, at least in part, for improving the performance of photocatalysts (semiconductor photocatalysts) by incorporating a metal (for example, a metal ion of a late transition metal, such as Nickel) adheres to the surface of the semiconductor (photocatalyst). More specifically, 1,2-ethanedithiol (EDT) acts as an excellent molecule for adhering a transition metal complex such as nickel (Ni2+ ion) to the surface of a semiconductor material used to form a cadmium sulfide surface linking agent (organic ligand). The photocatalyst has a special role in hydrogen evolution from hydrogen sulfide.
Owner:KING ABDULLAH UNIV OF SCI & TECH +1

A kind of catalyst for synthetic ammonia reaction

The invention relates to a transition metal hydride ammonia synthesis catalyst, the catalyst comprises a transition metal hydride and a carrier, and the ammonia synthesis catalyst exhibits extremely excellent catalytic activity, especially under low temperature and low pressure conditions (1 bar, lower than 300°C) .
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

A preparation process of transition metal carbide powder and transition metal carbide-nitride composite powder

The invention discloses a preparation process of transition metal carbide powder and transition metal carbide-nitride composite powder. The present invention uses a ball milling method to mix a transition metal with a certain amount of organic solvent containing carbon or carbon and nitrogen at the same time. After ball milling for a certain period of time, transition metal carbides or transition metal carbides with an average grain size of less than 50nm are obtained. The nitride composite powder contains a certain amount of transition metal hydride nano powder. The prepared powder is heat-treated under vacuum (<1Pa) or argon environment to obtain transition metal carbide or carbide-nitride composite powder, and the transition metal grain size distribution of 50-900nm is prepared by controlling the heating rate and heat treatment time. For metal carbide powders and transition metal carbide-nitride composite powders, the carbon and nitrogen contents varied with the ball milling time and the amount of organic solvent. The invention has simple process and is easy to produce, and can be used for preparing high-performance metal ceramics.
Owner:LONGYAN UNIV
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