107 results about "Magnesium hydride" patented technology

The present disclosure relates to the technical field of solid-state hydrogen storage materials, and specifically provides a magnesium-based hydrogen storage material based on a core-shell structure, a preparation method therefor, and use thereof. The magnesium-based hydrogen storage material based on a core-shell structure provided by the present disclosure comprises a hydrogenated combustion product of Ni / Fe3O4@MIL and MgH2, wherein Ni / Fe3O4@MIL is a material having a core-shell structure. An inner core of Ni / Fe3O4@MIL comprises Ni-loaded Fe3O4 microspheres, and an outer shell of Ni / Fe3O4@MIL comprises an organic ligand. The magnesium-based hydrogen storage material based on a core-shell structure significantly improves the hydrogen storage performance of magnesium hydride, and can still maintain a high hydrogen absorption capacity at a low temperature.

The utility model relates to a hydrogen purification system based on magnesium-based hydride, which comprises a buffer tank, a gas inlet of the buffer tank is connected with a discharge end of a hydrogen purification module through a first gas path header pipe, and a vacuum pump is mounted on the first gas path header pipe in a matched manner. An exhaust port of the buffer tank is connected with a feeding end of the hydrogen purification module through a second gas path header pipe, a metal hydrogen storage material is arranged in the hydrogen purification module, and a feeding port of the buffer tank is connected with an exhaust port of the feed gas storage device through a third gas path header pipe. By arranging the hydrogen purification module, hydrogen components in raw material gas can be absorbed based on magnesium hydride, and compared with some traditional physical and chemical purification schemes, the production cost is low; meanwhile, the number of hydrogen storage tanks in the hydrogen purification module can be reasonably set according to purification requirements, the use flexibility is good, the purity of obtained hydrogen is high, no other impurity gas is mixed in the purification process, and the working efficiency of the system is high.

The invention discloses an application method of magnesium hydride in hydroponic seedling hardening of rubber trees, which comprises the following steps: improving Hoagland into a hydroponic nutrient solution, adding magnesium hydride into the nutrient solution, and adjusting the pH value; the method comprises the following steps: selecting rubber tree stable-period test-tube plantlets which meet plant height requirements, have roots, stems and leaves and are pollution-free; and taking out the test-tube plantlet from the test tube, cleaning the culture medium on the root system, soaking with a carbendazim solution, and putting into a nutrient solution for hydroponic seedling hardening. According to the invention, 5-20mg of magnesium hydride is added into each liter of nutrient solution, so that the solution is in a hydrogen-rich state, the seedling hardening survival rate is obviously improved, and the plant quality is improved. Compared with a control group, the optimal concentration has the advantages that the seedling hardening survival rate is obviously improved, and the seedling hardening survival rates under the temperature conditions of 25 DEG C and 20 DEG C are respectively improved by 30% and 11%; the plant height and the stem diameter are respectively increased by 11.86% and 13.33% at the temperature of 25 DEG C, and reach an extremely remarkable level. The method provides support for improvement of a rubber tree seedling raising technology.

The invention discloses a hydrogen slow-release composite material based on moisture self-regulation and a hydrogen slow-release device and method.The composite material comprises, by mass, 15-25 wt% of a hydrogen production component, and the hydrogen production component comprises a solid hydrogen production material and is used for reacting with water to release hydrogen; the water absorption component is used for absorbing and retaining water; 5-25 wt% of a water-consuming component for reacting with water to consume water; wherein the total solid water amount corresponding to the water absorption component and the water consumption component is greater than the theoretical water amount required by complete reaction of the hydrogen production component; the raw materials are mixed, compacted and molded to obtain the hydrogen slow-release composite material. When external water supply fluctuates, the material system can spontaneously adjust moisture entering a reaction environment, so that the effective water consumption participating in the hydrolysis reaction of magnesium hydride is more stable, the hydrogen production process is easier to maintain a slow and stable release state, and the dependence on high-precision external water supply equipment and complex control links is reduced.

The invention relates to nano magnesium hydride powder and a preparation method thereof, and belongs to the technical field of magnesium hydride preparation. The preparation method of the nano magnesium hydride powder comprises the following steps: ultrasonically dispersing a composite base material, an auxiliary agent and deionized water, slowly dropwise adding a modified solution, heating, stirring and filtering, taking out a product, washing, and carrying out vacuum drying and calcining in a drying oven to obtain a composite coating body; magnesium hydride and the composite coating body are placed in absolute ethyl alcohol to be subjected to ultrasonic treatment, ball milling is conducted after vacuum drying is conducted, and the composite coating body is obtained. According to the technical formula provided by the invention, through the synergistic effect of the composite base material, the sodium alginate and the aluminum-zirconium coupling agent, the hydrogen storage capacity and the dehydrogenation rate of the nano magnesium hydride powder are remarkably improved, and the cycling stability is enhanced.

The application relates to the hydrogen production technical field, and discloses a hydrogen storage material based on magnesium hydride, a preparation method thereof and a hydrolysis hydrogen production method, which comprises a block structure formed by co-molding powdery magnesium, powdery magnesium hydride, powdery alkali metal salt or alkali earth metal salt, wherein the magnesium accounts for 16-22% in weight percentage, the magnesium hydride accounts for 70-76% in weight percentage, and the alkali metal salt or alkali earth metal salt accounts for 8% in weight percentage. The hydrogen storage material prepared by the application has high strength, high hydrogen storage density and fast hydrolysis performance, and is particularly suitable for stable hydrogen supply in a low-temperature environment such as a field.

The invention discloses a monatomic palladium-loaded titanium dioxide graded nanosphere for catalyzing magnesium hydride, and belongs to the technical field of hydrogen storage alloys and preparation thereof. The magnesium-based hydrogen storage material solves the problem that the existing magnesium-based hydrogen storage material has poor dynamic and thermodynamic properties and cannot meet the actual application requirements. The preparation method comprises the following steps: firstly, taking isopropyl titanate, diethylenetriamine and isopropanol as raw materials, preparing HA-TiO2 powder which exposes a large amount of {001} high-activity crystal faces by adopting a hydrothermal method, and further uniformly distributing monatomic Pd on the surface of the HA-TiO2 powder by adopting a chemical impregnation-reduction method to obtain Pd / TiO2 powder. The obtained Pd / TiO2 powder is used as a catalyst for catalyzing MgH2 hydrogen storage, the dehydrogenation temperature of a hydrogen storage material can be remarkably reduced, the hydrogen absorption / desorption rate is increased, and rapid hydrogen absorption at the room temperature is achieved.

The invention discloses a method for preparing magnesium borohydride by a solution method, and relates to the technical field of hydrogen storage materials. The method comprises the following steps: dissolving MgCl2 in tetrahydrofuran to form a magnesium source solution, dissolving NaBH4 in isopropylamine to form a boron-hydrogen source solution, mixing the two solutions, and stirring to react; carrying out centrifugation and microfiltration membrane suction filtration separation on the reacted mixture to remove solid impurities so as to obtain a clarified filtrate; and carrying out vacuum desolventizing treatment on the filtrate to finally obtain solid magnesium borohydride. The method is simple in process flow, can be completed under mild conditions, and has the advantages of low raw material cost and high operation safety; the prepared magnesium borohydride product has excellent performance of lower initial hydrogen desorption temperature, and the temperature is only 115.8 DEG C. The method is especially suitable for large-scale industrial production.

This invention provides a method for preparing nano-sized magnesium hydride, comprising the steps of preparing magnesium nanoparticles by gas-phase condensation, MXene-confined catalytic hydrogenation, and atomic layer deposition to construct a composite coating layer. This invention achieves the preparation of ultrafine magnesium nanoparticles through gas-phase condensation; simultaneously utilizing the three-dimensional wrinkled structure Ti3C2T x MXene not only effectively prevents the migration and aggregation of nanoparticles during cycling through physical confinement, but also lowers the energy barrier of hydrogen adsorption and desorption reactions through in-situ generated highly active catalytic phases (such as TiH2), achieving a dual synergistic effect of confinement and catalysis. A titanium dioxide-amorphous carbon composite coating layer is constructed using atomic layer deposition (ALD) technology, which, in conjunction with the MXene confinement framework, provides a dual stabilization mechanism for nano-magnesium hydride. This invention organically combines gas-phase condensation, MXene-confined hydrogenation, and ALD coating, resulting in a product with an initial dehydrogenation temperature below 100°C and a hydrogen storage capacity retention rate exceeding 95% after 3000 hydrogen adsorption and desorption cycles, demonstrating excellent comprehensive performance.

The application discloses a preparation method of a black phosphorus doped magnesium-based novel hydrogen storage material, and the method comprises the following steps: mixing and ball-milling black phosphorus micro powder and magnesium powder obtained through electrochemical exfoliation under an inert gas atmosphere, and performing ultrasonic crushing to obtain a nano Mg / BP composite material; and performing heat treatment on the nano Mg / BP composite material under an H2 atmosphere to obtain a nano MgH2 / BP hydrogen storage material. The method uses cheap magnesium powder as raw material, embeds the magnesium powder between expanded black phosphorus layers by using a simple method combining ball-milling and ultrasonic crushing, uses lone pair electrons of the black phosphorus as anchor points to solve the problem of easy agglomeration of magnesium powder nanoparticles, simultaneously uses a large specific surface area of the black phosphorus and strong physical adsorption characteristics of the black phosphorus on hydrogen to expand the capacity of the hydrogen storage material, and finally uses the attraction ability of the lone pair electrons of the black phosphorus on high-valence magnesium in magnesium hydride to weaken Mg-H bonds and effectively reduce the dehydrogenation temperature. The preparation method has the advantages of low cost, short cycle, strong repeatability and wide application prospect in the field of hydrogen energy.

The application relates to a composite catalytic system for accelerating hydrogen production by magnesium hydride hydrolysis and a preparation method and application thereof, relates to the technical field of hydrogen production by magnesium hydride hydrolysis, and solves the problem that the existing hydrogen production by magnesium hydride hydrolysis reaction has large mass transfer resistance in the later stage and it is difficult to realize rapid and complete conversion of MgH2 under mild conditions. The composite catalytic system is composed of independently mechanically ball-milled pre-activated magnesium hydride powder and cerium chloride powder. In an inert atmosphere, the magnesium hydride powder is independently mechanically ball-milled for pretreatment to obtain activated magnesium hydride powder; the activated magnesium hydride powder and the cerium chloride powder are uniformly mixed according to a set molar ratio to obtain a cerium-based composite catalytic system. The above cerium-based composite catalytic system is added into water to initiate a hydrolysis reaction for hydrogen production at 20-60 DEG C. The catalytic system can stably meet the rapid gas production demand of a portable hydrogen supply device, has catalytic efficiency and cost advantages, and is suitable for large-scale application in actual scenes.

The application discloses a kind of hydrogen-rich physiotherapy products and preparation method thereof, belong to medical health technical field.The application first uses propyl gallate as main modifier to modify magnesium hydride and magnesium powder, and obtains modified magnesium powder and modified magnesium hydride;After adding natural medicinal plants and hydrogen-rich components (modified magnesium powder and modified magnesium hydride etc.) in hot compress product, increase traditional Chinese medicine physiotherapy and hydrogen therapy function while hot compress physiotherapy, realize the multifunctionalization of hot compress product;Meanwhile, the unique surface coating material is used to physically wrap magnesium powder and magnesium hydride without affecting its physical and chemical properties, which can prevent the product from reacting with water and oxygen during storage, and also does not hinder the reaction of hot steam with magnesium powder and magnesium hydride, thereby accelerating the hydrogen release amount and release speed.

The invention discloses a hydrogen storage and release device of a hybrid electric vehicle and a control method. A hydrogen compressor extracts hydrogen from a hydrogen station through a hydrogen inlet solenoid valve, and the hydrogen enters a magnesium hydride storage tank through a normally closed valve of an opened two-position three-way solenoid directional valve, a container of a thermomagnetic generator and an electric ball valve. The gear reducer motor is started to drive the magnesium hydride storage tank to rotate. Microwaves enter a circle of quartz tubes through an electric gate valve and then penetrate through the walls of the quartz tubes to enter a magnesium hydride storage tank, magnesium powder in the magnesium hydride storage tank is evenly heated, magnesium reacts chemically with hydrogen of 1-2 Mpar at the temperature of 300-400 DEG C, and magnesium hydride is generated. When hydrogen needs to be released, the gear reducer motor is started to drive the magnesium hydride storage tank to rotate. Microwaves enter a circle of quartz tubes through an electric gate valve and then penetrate through the walls of the quartz tubes to enter a magnesium hydride storage tank to be absorbed by magnesium powder, a large amount of heat is generated and transmitted to magnesium hydride, the magnesium hydride is heated to 200-300 DEG C to be subjected to decomposition reaction, and hydrogen is released.

The utility model belongs to the field of magnesium powder production, and discloses a grinding and crushing device for magnesium powder production, which comprises a main cylinder assembly for containing magnesium powder particles, grinding and discharging the magnesium powder particles, and a feeding assembly mounted at the top end of the main cylinder assembly and used for conveying the magnesium powder particles and discharging hydrogen, a rotary grinding assembly used for spirally pushing magnesium powder particles downwards and grinding and smashing the magnesium powder particles is arranged in the middle of the main cylinder assembly. The top end of the transmission shaft is provided with a motor, the circumference of the transmission shaft is provided with spiral pushing blades, and the bottom of the transmission shaft is provided with a rotary grinding head; the feeding assembly comprises an auxiliary box cylinder, a supporting frame is arranged at the bottom in the auxiliary box cylinder, a feeding mechanism is arranged on one side of the top of the auxiliary box cylinder and penetrates into the auxiliary box cylinder in the tangential direction, and an air outlet mechanism is installed at the top end of the auxiliary box cylinder. According to the grinding and crushing device for magnesium powder production, magnesium powder particles are ground and crushed to form a reaction contact surface in a whole-course hydrogen environment, so that the generation of magnesium hydride is promoted, and the utilization rate of the magnesium powder particles and the preparation efficiency of the magnesium hydride are improved.

To provide a method for producing magnesium hydride which has reduced running costs associated with the use of inert gas (noble gas) such as argon gas.SOLUTION: There is provided a method for producing magnesium hydride which comprises: a pulverization step of pulverizing magnesium by adding a fatty acid; and a hydrogenation step of hydrogenating the pulverized magnesium by heating the magnesium to a temperature of 140°C or more and less than the decomposition temperature of magnesium hydride in a reaction vessel to which hydrogen gas is supplied so as to keep the pressure 5 atmospheres or less, wherein a storage treatment of storing the pulverized magnesium in the reaction vessel is performed under an atmosphere of nitrogen gas and the pulverized magnesium is not allowed to contact with oxygen until the hydrogenation step has been completed.SELECTED DRAWING: Figure 8

The application discloses a kind of carbon nanofiber load MnTi bimetallic microspheres, with the compound of transition metal titanium isopropyl titanate, manganese chloride tetrahydrate, polyvinylpyrrolidone PVP as raw material, carbon nanofiber load MnTi bimetallic microspheres PVP-MnTi are obtained by electrospinning method;Carbon nanofiber load MnTi bimetallic microspheres CNT-MnTi can be prepared by calcining again.The preparation method includes the following steps:1, the electrospinning of PVP-MnTi;2, the preparation of CNT-MnTi.As the application of MgH2 hydrogen storage catalyst, CNT-MnTi is ball milled with magnesium hydride, and a kind of magnesium hydride hydrogen storage material based on CNT-MnTi is obtained;Under the condition that the temperature programmed rate is 3 DEG C / min, the initial hydrogen release temperature is 180-190 DEG C;Under the condition that the hydrogen absorption pressure is 20-30bar, the hydrogen absorption temperature is 150-250 DEG C, the hydrogen absorption time is 200-600s, the hydrogen absorption amount is 5.8-6.2wt%;Under the condition that the hydrogen release temperature is 275-350 DEG C, the hydrogen release time is 240-360s, the hydrogen release amount is 4.0-6.1wt%.

The invention relates to a high-entropy alloy loaded transition metal oxide composite catalyst for hydrogen storage and a preparation method thereof.The preparation method of the composite catalyst comprises the steps that an iron source, a cobalt source, a nickel source, a chromium source, a copper source and terephthalic acid are dissolved in an organic solvent, ultrasonic oscillation is conducted till all the materials are dissolved to form a transparent solution, and a solution A is obtained; transferring the solution A into a high-pressure reaction kettle with a polytetrafluoroethylene lining, sealing and heating, and cooling to obtain a solution B; successively adding absolute ethyl alcohol and deionized water into the solution B, and centrifugally cleaning the solution to obtain a colloidal precursor; transferring the colloidal precursor into a vacuum oven, and drying to obtain precursor solid particles; and calcining the precursor solid particles in an argon atmosphere to obtain the composite catalyst. The high-entropy alloy loaded transition metal oxide composite catalyst has excellent hydrogen storage performance when applied to a magnesium hydride-based solid hydrogen production material.

The magnesium-based hydrogen storage alloy preparation device and process based on the hydrogenation combustion method have the following beneficial effects that the magnesium-based hydrogen storage alloy is prepared through the hydrogenation combustion method, spherical magnesium powder and other alloy element powder are fully and evenly mixed, and the obtained mixed raw material powder is not pressed, so that the magnesium-based hydrogen storage alloy is prepared; the powder is directly used for synthesis of the magnesium-based hydrogen storage alloy, and the loose powder is internally provided with an interstitial space for hydrogen to enter; raw material powder is heated in a sealed reaction chamber with the pressure higher than normal pressure, hydrogen is introduced to make contact with the powder, the hydrogenated magnesium-based hydrogen storage alloy is obtained by combining the raw material powder with the hydrogen within set time, in the preparation process, spherical magnesium powder is always in a solid state, burning loss is avoided, and the obtained magnesium-based hydrogen storage alloy is accurate in component; and moreover, the problem of high power consumption required by magnesium hydride manufacturing is reduced, the problem of oxidation in the powder transfer process can be effectively controlled, and the activation frequency required by the hydrogen storage alloy is also greatly reduced.

The present application relates to hydrogen production material technical field, especially to a kind of self-purification hydrogen production material, its preparation method and application.Self-purification hydrogen production material is composed of the following mass parts of raw materials: magnesium hydride 1-5 parts, attapulgite powder 80-90 parts and chitosan 10-15 parts.The present application also discloses the preparation method of self-purification hydrogen production material and its application in the preparation of hydrogen-rich water.The self-purification hydrogen production material of the present application uses magnesium hydride as hydrolysis hydrogen source, cooperates with the flocculation of attapulgite powder and chitosan, which can reduce the generation of magnesium hydroxide gel in water body, prevent water body from being contaminated by third-party impurities, has better self-purification effect, no toxic and odor gas is produced, which can ensure the quality of water body, and also can purify water body, the hydrogen produced by hydrolysis reaction improves water quality.

The invention provides a hydrogen-rich tea bag and a preparation method thereof. The hydrogen-rich tea bag comprises an upper wrapping bag and a lower wrapping bag fixed to the lower portion of the upper wrapping bag, the hydrogen-rich tea bag is of a triangular pyramid structure, and an inner cavity of the upper wrapping bag is a first cavity used for storing tea particles; and an inner cavity of the lower coating bag is a second cavity and is used for storing magnesium hydride particles. According to the hydrogen-rich tea bag, magnesium hydride and water are subjected to a chemical reaction to generate hydrogen, so that a hydrogen-rich source is provided for the tea bag. Water can enter the lower coating bag to react with the magnesium hydride particles and generate hydrogen, and the hydrogen penetrates through the top of the lower coating bag to enter the first cavity and then makes contact with the tea particles and water in the first cavity, so that the dissolution efficiency of tea components is improved, the taste of tea water is improved, and the antioxidant function of the tea water is achieved; meanwhile, the hydrogen bubbles entering the first cavity can drive the tea particles to move in the first cavity, the dissolution efficiency of tea components is further improved, and the flavor extraction effect of tea water is improved.

The invention discloses an Er2O3 / Ni3ZnC0.7 catalyst, preparation of the Er2O3 / Ni3ZnC0.7 catalyst and application of the Er2O3 / Ni3ZnC0.7 catalyst to improvement of hydrogen storage performance of magnesium hydride. The preparation method comprises the following steps: (1) dissolving nickel acetate, zinc acetate and erbium nitrate in DMF (Dimethyl Formamide), and magnetically stirring to form a solution A; (2) dissolving terephthalic acid and triethylamine in DMF (Dimethyl Formamide), and magnetically stirring to form a solution B; (3) pouring the solution B obtained in the step (2) into the solution A, and continuing magnetic stirring to obtain metal organic gel C; (4) carrying out vacuum filtration on the gel C obtained in the step (3), and washing with DMF (Dimethyl Formamide); and (5) carrying out high-temperature calcination on the gel obtained in the step (4) in an argon atmosphere, and grinding to obtain the Er2O3 / Ni3ZnC0.7 catalyst. The method has the characteristics of simplicity and convenience in operation, low cost, controllable catalyst morphology and high catalytic efficiency.

The invention belongs to the technical field of hydrogen storage materials, and provides a preparation method of a composite hydrogen storage material and the composite hydrogen storage material.The preparation method comprises the following steps that a nickel metal organic framework precursor is prepared from a nickel source and an organic ligand through a hydrothermal synthesis method; carrying out heat treatment on the nickel metal organic framework precursor to obtain a nickel / carbon nanomaterial with a nickel nanoparticle and amorphous carbon matrix composite structure; and carrying out ball-milling mechanochemical interaction on the prepared nickel / carbon nano material, magnesium hydride and lithium aluminum hydride according to a preset proportion to obtain the nickel / carbon / magnesium hydride / lithium aluminum hydride composite hydrogen storage material. The advanced solid hydrogen storage material with high capacity, fast dynamics, low operation temperature and long cycle life is successfully prepared by constructing a magnesium hydride / lithium aluminum hydride composite system and combining the catalytic action of the nickel / carbon nanomaterial, and a feasible solution is provided for efficient and safe storage and utilization of hydrogen energy.

The invention discloses a magnesium hydride-magnolol composite polymer microneedle system as well as a preparation method and application thereof. The magnesium hydride-magnolol composite polymer microneedle system is (PVA-PVP)-x (MgH2-Mag), the mass ratio of PVA to PVP is (1: 2)-(1: 0.25); the ratio of MgH2 to Mags is 1: 1-1: 0.05; x is 1: 20-1: 5, the magnesium hydride-magnolol composite polymer microneedle (PVA-PVP)-x (MgH2-Mag) for treating androgenic alopecia is in a three-dimensional microneedle form, the height is 120-950 [mu] m, the substrate width is 80-500 [mu] m, and the needle tip diameter is 6-80 [mu] m. Through unique structural design and material combination, efficient co-delivery and synergistic release of the two active components are realized, and a brand new solution is provided for AGA treatment.

The invention discloses an fct-phase NiAg nano-particle catalyst as well as a preparation method and application of the fct-phase NiAg nano-particle catalyst. The fct-phase NiAg nanoparticle catalyst is of a core-shell structure and comprises a bimetallic core containing Ni and Ag and a nitrogen-doped carbon layer coating the surface of the bimetallic core, and the crystal phase of fct-phase NiAg nanoparticles is a metastable-state fct phase. The catalyst provided by the invention overcomes the synthesis bottleneck of a NiAg immiscible system, realizes anti-sintering and structure locking at high temperature, can construct an efficient transmission network of electrons and hydrogen when being applied to the field of magnesium hydride, establishes dual channels of electron conduction and rapid hydrogen permeation on the surface of magnesium hydride, and has a good application prospect in the field of magnesium hydride. And the unification of rapid dynamics and long cycle stability is realized.

The present application relates to a magnesium-based hydrogen storage material based on magnesium dihydride and copper vanadate and a preparation method thereof, and belongs to the technical field of hydrogen storage material preparation. The present application mainly coats Cu3(VO4)2 powder on the surface of MgH2 powder through ball milling, and uses Cu3(VO4)2 bimetallic oxide to synergistically catalyze and modify the Mg / MgH2 system, significantly improves the hydrogen absorption and desorption rate of MgH2, obtains a composite hydrogen storage material with excellent low-temperature hydrogen storage performance, and simultaneously achieves the common optimization and improvement of hydrogen absorption kinetics and the total amount of hydrogen absorption and desorption. Compared with single metal oxides and other forms of added bimetallic elements, the present application is to solve the problems of high hydrogen absorption and desorption temperature and slow kinetics of MgH2, realize fast hydrogen absorption and desorption kinetics at medium temperature, that is, realize hydrogen absorption at low temperature (100 DEG C), and have fast hydrogen desorption kinetics at a relatively low hydrogen desorption temperature (for example, 225 DEG C, 250 DEG C).

The invention relates to a method for promoting growth of bacillus in rice field soil by using a magnesium hydride multifunctional soil conditioner. The invention particularly relates to a method for promoting the growth of bacillus in rice field soil and reducing the biomass of fusarium, which comprises the step of applying a soil conditioner to the rice field soil, and the soil conditioner comprises biochar, magnesium hydride and biological organic matters. The method provided by the invention can promote the growth of bacillus in the rice field soil and reduce the biomass of fusarium in the soil, thereby remarkably promoting the disease resistance of the rice.

The invention discloses a La-containing high-entropy alloy, HEAs-La is prepared from Ti, Fe, Co, Ni, Cu and La in an amount-of-substance ratio of 1: 1: 1: 1: 0.7: 0.3 through a ball milling method, the mixed entropy is 1.73 R, the lattice distortion degree delta is 11.74%, and the La-containing high-entropy alloy contains a LaNi phase, a TiCo3 phase, a Cu2Ti phase and a FeNi phase; the particle size of the small alloy particle aggregate is 1-4 m. A preparation method of a magnesium hydride hydrogen storage material based on a La-containing high-entropy alloy comprises the following steps that ball milling is conducted on HEAs-La and MgH2, and the magnesium hydride hydrogen storage material MgH2-HEAs-La based on the La-containing high-entropy alloy is obtained; the obtained magnesium hydride hydrogen storage material based on the La-containing high-entropy alloy is applied to the field of hydrogen storage, the initial hydrogen desorption temperature is reduced to 177.20-179.68 DEG C, and the hydrogen desorption amount reaches 6.78-6.79 wt%; the hydrogen desorption amount is 6.19 to 6.20 wt%; the hydrogen absorption amount is 5.31 to 5.41 wt%; the dehydrogenation activation energy Ea ranges from 67.54 kJ mol <-1 > to 67.59 kJ mol <-1 >, and the hydrogen absorption activation energy Ea ranges from-62.30 kJ mol <-1 > to-62.35 kJ mol <-1 >.

The application discloses a kind of core-shell nanostructure magnesium hydride-magnesium borohydride hydrolysis hydrogen production materials and preparation method thereof.A kind of core-shell nanostructure magnesium hydride-magnesium borohydride hydrolysis hydrogen production material preparation method, comprising the following steps: magnesium hydride is loaded into ball mill jar vacuum, then borane gas is filled in ball mill jar, ball milling treatment is carried out, and the core-shell nanostructure magnesium hydride-magnesium borohydride hydrolysis hydrogen production material is obtained.The application uses solvent-free gas-solid reaction, ball milling method, simple, low cost;This composite method not only avoids the direct use of expensive magnesium borohydride, but also overcomes the shortcomings of other composite systems, and even improves the theoretical hydrogen release capacity;The in-situ formed magnesium borohydride nanoshell plays a key role in improving the hydrolysis kinetics of magnesium hydride by releasing heat and forming a local magnesium ion and metaborate ion solution environment.

The application provides a plant fertilizer additive and a solid mixed hydrogen fertilizer and a preparation method. The plant fertilizer additive comprises magnesium hydride, calcium hydride and diatomite, wherein the magnesium hydride is a main agent, the calcium hydride is a first auxiliary agent, and the diatomite is a second auxiliary agent. According to the technical scheme, hydrogen fertilizer can be stably provided for plants, the cost is low, the preparation method is safe, and the fertilizer has good stability.

The application relates to the technical field of hydrogen storage materials, and particularly provides an in-situ preparation method of a nickel-based catalyst for magnesium hydride modification. The method first adopts a single-roller spin-chilling method to prepare an Al3Ni amorphous alloy, then etches the Al3Ni amorphous alloy to obtain a catalyst, and after drying, the catalyst is mixed with magnesium hydride under the protection of argon and is subjected to ball milling, so that a Mg3AlNi2 catalytic phase is generated in-situ. The core of the method is to control the microstructure of a precursor alloy through an etching process, and to realize in-situ construction of a catalytically active phase in combination with mechanical ball milling. The prepared aluminum-nickel-based catalyst can significantly improve the dehydrogenation kinetic performance of magnesium hydride, and has good application potential in the field of hydrogen storage materials.