71 results about "Ammonia borane" patented technology

The invention discloses a low-pressure portable efficient hydrogen production device based on ammonia borane, which comprises a pressure-resistant and high-temperature-resistant cylindrical shell, an annular porous skeleton in which an efficient catalyst is embedded, a pluggable stirring module, a heating assembly, a gas exporting and purifying module, a safety monitoring assembly and the like, and relates to the technical field of hydrogen production equipment. According to the low-pressure portable efficient hydrogen production device based on ammonia borane, the shell has pressure-resistant and high-temperature-resistant performance, by adopting a special efficient catalyst, the pyrolysis reaction temperature of ammonia borane is reduced, the generation rate and yield of hydrogen are increased, efficient hydrogen production is achieved, the device is provided with a temperature sensor and a pressure safety valve, safety is guaranteed, and the device is suitable for popularization and application. The reaction product nitrogen boride can be utilized, key materials can be recycled and replaced regularly, the device is suitable for a robot with a body, a robot dog, an unmanned aerial vehicle, an emergency power supply and the like, hydrogen can be supplied integrally or in a distributed mode, and the problems that an existing hydrogen production device is low in efficiency, poor in portability, insufficient in safety and the like are effectively solved.

The invention discloses a single crystal boron nitride wafer batch preparation method based on a copper-nickel single crystal film and application, and belongs to the technical field of two-dimensional material preparation and nano electronic device manufacturing. The method comprises the following steps: forming a Cu80Ni20 (111) single crystal film on a c-plane sapphire substrate through magnetron sputtering and high-temperature annealing to serve as a growth substrate; carrying out thermal conversion treatment on the ammonia borane precursor to form a supply source system capable of stably releasing a borazine gas phase precursor; a porous structure quartz sleeve is adopted to regulate and control the release behavior of a precursor, and multi-wafer airflow homogenization control is realized in a CVD system through a quartz staggered wafer carrier; and carrying out epitaxial growth, and synchronously preparing more than 10 single crystal boron nitride wafers which are consistent in crystal orientation, smooth in surface and free of crystal boundaries in a single batch. According to the method, efficient, uniform and repeatable batch preparation of the high-quality monocrystal h-BN is realized, and the obtained wafer has atomic-scale flatness and excellent insulating property and is suitable for high-performance two-dimensional electronic devices, deep ultraviolet photoelectric devices and quantum device platforms.

The invention discloses a preparation method of a catalyst for ammonia borane hydrogen desorption by water based on efficient multifunctional active sites, which comprises the following steps: firstly, adding prepared MXene into deionized water to form a dispersion solution, then dissolving Co (NO3) 2.6 H2O and Ni (NO3) 2.6 H2O solutions into a polyvinylpyrrolidone solution, then adding the solution into the MXene solution to form a metal mixed dispersion solution, and finally adding the metal mixed dispersion solution into the MXene solution to form the catalyst for ammonia borane hydrogen desorption by water. The preparation method comprises the following steps: adding a NaBH4 solution into a tubular furnace to form CoB-Ni3B / MXene, calcining the CoB-Ni3B / MXene in the tubular furnace, and obtaining the CoB-NiCoP-Ni3B / MXene catalyst through a phosphorus induction method. According to the method, the preparation process is controllable, the defects that a noble metal-based catalyst is high in price and limited in resource in hydrogen production by hydrolysis of ammonia borane are overcome, and the problems that non-noble metal is easy to aggregate in the preparation process and the non-noble metal catalyst is low in activity and poor in stability in hydrogen production by hydrolysis of ammonia borane are solved.

The invention discloses a Ni / TiO2 (at) C nano-catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The preparation method comprises the following steps: mixing TiO2 (at) C powder, water and a nickel source precursor to obtain a suspension; and mixing the suspension liquid with a reducing agent, and carrying out a reduction reaction to prepare the Ni / TiO2atC nano-catalyst. The catalyst comprises a TiO2 (at) C nanosheet and Ni nanoparticles dispersed on the TiO2 (at) C nanosheet, wherein the average particle size of the Ni nano particles is 2.0 nm to 3.0 nm, and the content of the Ni nano particles is 12.8 wt% to 53.9 wt%. The catalyst shows excellent catalytic performance, 100% H2 selectivity and remarkable durability, and the TOF value of catalyzing ammonia borane to hydrolyze and produce hydrogen under the condition of no additive at 298 K reaches up to 253 min <-1 >.

The invention discloses a preparation method and application of a high-efficiency palladium catalyst for tandem ammonia borane dehydrogenation and nitro-aromatic hydrogenation reaction. The catalyst for the tandem ammonia borane dehydrogenation and nitro-aromatic hydrogenation reaction is a porous nitrogen-doped carbon material with palladium nanoparticles uniformly enriched in pore channels, the specific surface area of the catalyst is 120.18 m < 2 > / g, and the average pore size is 4-6 nm. The catalyst disclosed by the invention is applied to tandem ammonia borane dehydrogenation and nitro-aromatic hydrogenation reaction, water is used as a solvent in the reaction process, and the catalyst has the advantages of green synthesis, high activity, high selectivity and high stability.

The preparation method of the heterojunction device comprises the steps that a boron nitride thin film is prepared with ammonia borane as a precursor, then a gallium nitride layer grows on the boron nitride thin film to form a heterojunction structure, and the ratio of the usage amount of the ammonia borane to the area of a substrate is 150 mg / cm < 2 > to 250 mg / cm < 2 >. According to the preparation method provided by the embodiment of the invention, a high-quality BN-GaN heterojunction neutron device can be provided, and a foundation is laid for research, development and application of a novel neutron detector for replacing a 3He tube. Ammonia borane is non-toxic, non-flammable and non-explosive at normal temperature, is stable and easy to store, has a stoichiometric ratio of B / N of 1: 1, is relatively low in decomposition temperature and pollution-free in decomposition product, can be used as a boron source and a nitrogen source, and is a single precursor. The quality of the heterojunction device is guaranteed, the production cost is reduced, and the heterojunction device has the advantages of simple structure, relatively small size, good linear range, short response time, easy n / gamma discrimination, high detection efficiency and the like.

The invention discloses a hexagonal scandium hydrogen compound and a preparation method thereof, and the preparation method comprises the following steps: taking a borane ammine complex as a solid hydrogen source, tabletting the borane ammine complex and elemental scandium through a mold, and stacking according to'hydrogen source-scandium-hydrogen source '; loading the assembly into a CVD diamond single crystal tube with holes, and carrying out secondary wrapping with NaCl to form a sealed reaction unit; carrying out segmented pressurization / depressurization in a cubic press, electrifying and segmented heating under the condition of 800-1200 DEG C, and carrying out pressure maintaining and cooling to complete synthesis; according to the method, local high hydrogen partial pressure is established under the action of moderate high pressure and double-layer sealing, external introduction of high-pressure hydrogen is avoided, and the equipment complexity and the safety risk are reduced; the product prepared by the invention is hexagonal-phase ScH3, can stably exist at normal temperature and normal pressure, and is different from cubic-phase ScH3 which can only be synthesized under an extreme high-pressure condition and cannot be kept stable after pressure relief, XRD and structure refinement are consistent with the standard, and the process can be repeated and amplified.

The application belongs to the technical field of catalysts, and discloses a supported ruthenium nanocluster catalyst Ru / CNT@CN, a preparation method and application thereof. The catalyst takes carboxylated carbon nanotubes as a carrier, has a carbon nitride shell outside the carrier, and has ruthenium nanoclusters inlaid on the surface of the carbon nitride shell in situ. The preparation steps are as follows: (1) a mixed acid solution composed of concentrated nitric acid and concentrated sulfuric acid is used to perform oxidation treatment on multi-walled carbon nanotubes, and the carbon nanotubes are washed and dried to obtain carboxylated carbon nanotubes, denoted as CNT; (2) first, the CNT, DCD, Ru metal salt and water are stirred at 50-100 DEG C for 2-12 h to obtain a dispersion liquid; then, the dispersion liquid is frozen with liquid nitrogen and subjected to freeze-drying treatment to obtain a catalyst precursor CNT@DCD-Ru; finally, the CNT@DCD-Ru is annealed at 500-700 DEG C for 2-8 h in a hydrogen-inert gas mixed atmosphere to obtain the target catalyst Ru / CNT@CN. The catalyst is applied in the hydrogen production by ammonia borane hydrolysis or the transfer hydrogenation reaction of nitroaromatic compounds. The catalyst prepared by the application has excellent catalytic activity and stability.

The invention discloses an adhesive and a preparation method thereof, the adhesive is used for bonding perfluoroether rubber and metal, and the adhesive is prepared from the following raw materials in parts by weight based on 100 parts of the adhesive: 80-98 parts of absolute ethyl alcohol; 0.2 to 5 parts by weight of a borane ammonia complex; 1 to 10 parts by weight of vinyl silane; and 1-5 parts by weight of silica sol. The adhesive provided by the invention is a combination of a borane ammonia complex, vinyl silane, nano silicon dioxide sol and absolute ethyl alcohol in specific parts; by selecting the combination of the borane ammonia complex, the silane coupling agent KH570 and the nano silicon dioxide sol to replace the existing common perfluoroether rubber / metal adhesive, the perfluoroether rubber / metal adhesive has excellent peel strength and high temperature resistance, and can be used for manufacturing door plates and racket products of semiconductor equipment.

The invention discloses a preparation method and application of an AgCo / NiTiO3 ammonia borane alcoholysis hydrogen production catalyst with photocatalytic activity. NiTiO3 microrods are synthesized through a sol-gel method, then metal silver salt and cobalt salt are reduced into alloy through an ethylene glycol reduction method, the alloy is deposited on the surfaces of the NiTiO3 microrods, and the AgCo / NiTiO3 ammonia borane alcoholysis hydrogen production catalyst is obtained. The obtained sample has photocatalytic activity in the alcoholysis reaction of ammonia borane, and under the irradiation of visible light, the performance of catalyzing the alcoholysis of ammonia borane to produce hydrogen is remarkably improved. In addition, in the synthesis process, the silver-cobalt ratio can be regulated and controlled to further optimize the components of the catalyst; the whole preparation process is simple to operate, environment-friendly, good in experimental reproducibility, low in cost and easy for industrial production.

The invention discloses a preparation method of a catalyst for propionitrile hydrogenation to prepare propylamine, which comprises the following steps: mixing and grinding ammonia borane and hexagonal boron nitride, carrying out temperature programming pyrolysis, washing and drying to obtain a mesoporous BN material; then hydrogen is introduced for gradient etching, and gradient nitrogen vacancies are constructed; adding the gradient nitrogen vacancy BN carrier into a nickel-iron precursor solution and a triethylamine-ethanol mixed solution, and carrying out solvothermal loading to complete in-situ reduction and loading; and finally, applying the prepared catalyst to the propionitrile hydrogenation to prepare the propylamine. The catalyst prepared by the method has the characteristics of large specific surface area (700-900 m < 2 > / g), concentrated pore size distribution (2-15 nm) and the like, and shows excellent catalytic performance in a propionitrile hydrogenation reaction, the propionitrile conversion rate is greater than or equal to 98%, the propylamine selectivity is greater than or equal to 98.7%, and the dipropylamine generation amount is 1t; 0.5%; compared with the prior art, the invention has the advantages of simple preparation process, low cost, high catalyst activity, good stability, mild reaction conditions, low energy consumption, strong safety and good industrial application prospect.

The application provides a high-boron-content polymer and a preparation method and application thereof, and relates to the technical field of high polymer materials. The preparation method of the high-boron-content polymer comprises the following steps: dissolving polysilazane in an organic solvent under the protection of nitrogen or argon to obtain a polysilazane mixed solution; and adding ammonia borane to the polysilazane mixed solution under the condition of a temperature of-10 DEG C to 0 DEG C, and stirring and reacting to obtain the high-boron-content polymer. Under the condition of a temperature of-10 DEG C to 0 DEG C, the borohydride reaction between ammonia borane and polysilazane is assisted by low-temperature liquid phase, the high-boron-content polymer is prepared, ammonia borane is used as a boron source, the synthesis difficulty is reduced, and the synthesis efficiency is increased; the boron content of ammonia borane is high, and ammonia borane is non-toxic and safe; meanwhile, the synthesis can be completed under the condition of low temperature, the reaction is easier and safer, the synthesis efficiency of the synthesized polymer is improved, and the high-boron-content polymer can be generated in a large quantity.

The invention discloses a precursor treatment method for preparing a boron nitride film, and belongs to the field of two-dimensional material preparation. The precursor treatment method for preparing the boron nitride film comprises the following steps: heating ammonia borane powder in a hydrogen atmosphere at 120-140 DEG C to obtain ammonia borane with a stalactite-shaped structure. By regulating and controlling the structure and release behavior of ammonia borane, stable supply of a growth source is achieved, generation of by-products is inhibited, the film quality is improved, and the method is suitable for large-scale integrated preparation of device-level two-dimensional materials.

The present invention discloses a method for preparing aromatic primary amines by homogeneous catalytic reduction of nitroarenes with an N-heterocyclic carbene copper complex. This method uses an inexpensive and stable N-heterocyclic carbene copper complex as the catalyst, ammonia borane as the hydrogen source, and ethanol as the solvent. Without the need for expensive ligands, the reduction of nitro groups can be achieved under mild conditions, and the target compound aromatic primary amine can be obtained in a relatively high yield. The present invention uses a homogeneous copper catalytic system for the reduction of nitroarenes, which has the advantages of low cost, short reaction time, mild reaction conditions, and simple operation, and avoids the use of special equipment such as hydrogen under a certain pressure and autoclaves.

The invention relates to the technical field of ammonia borane hydrolysis hydrogen desorption, and provides an ammonia borane hydrolysis catalyst and a preparation method thereof. The preparation method comprises the following steps: preparing a graphene aerogel electrode; preparing an electrolyte comprising a phosphorus-containing compound and a transition metal compound according to a preset proportion; the graphene aerogel electrode and the electrolyte are subjected to an electro-deposition reaction under preset conditions, and the ammonia borane hydrolysis catalyst is obtained. According to the scheme, the problems that high-temperature and high-pressure conditions are needed in the existing catalyst preparation process and the green chemical principle is not met can be solved.

This invention discloses a bifunctional catalyst, its preparation method, and its applications. The preparation method includes: firstly, loading alumina onto SBA-15 via impregnation, followed by drying and calcination to obtain a composite support Al2O3-SBA-15; then, loading the noble metal Rh onto the composite support using a precipitation deposition method, followed by solid-liquid separation, washing, drying, calcination, and reduction treatment to obtain the Rh / Al2O3-SBA-15 bifunctional catalyst. In the catalyst prepared by this invention, the modification with Al2O3 enhances the metal-support interaction, improving the dispersion and stability of Rh. The catalyst of this invention exhibits excellent bifunctional catalytic performance, capable of efficiently catalyzing the hydrolysis of ammonia borane to produce hydrogen, and effectively reducing N-nitrosodimethylamine in water using in-situ generated hydrogen, achieving an integrated treatment process of "in-situ hydrogen production-simultaneous reduction." The preparation process of this invention is simple, convenient to operate, and operates under mild reaction conditions. The obtained catalyst has broad application prospects in the field of ammonia borane-assisted water pollutant treatment.

The invention discloses a copper-cobalt-loaded ferric oxide composite photocatalyst, a preparation method and application of the copper-cobalt-loaded ferric oxide composite photocatalyst in hydrogen production by photocatalytic ammonia borane hydrolysis, and belongs to the technical field of photocatalysts. The composite photocatalyst (CuxCoy-alpham-gamman-Fe2O3-R, m + n = 100, x + y = 100, and both x and y are not 0) takes Fe2O3 as a core and copper-cobalt bimetallic nanoparticles reduced by sodium borohydride as an active component, and efficient hydrogen production by ammonia borane hydrolysis is realized through a photocatalysis synergistic effect. The method is simple in synthesis step, small in pollution, low in equipment requirement, mild in reaction condition and easy to implement. Under illumination, strong reducing electrons are generated on the surface of the catalyst, the hydrolysis activation energy is remarkably reduced, the hydrogen production rate reaches 21875 mL.min <-1 >. G <-1 > and is increased by 258% compared with that without illumination, the hydrogen yield can reach 100%, and the activity of the composite photocatalyst is not attenuated after 10 times of circulation after magnetic recovery.

The present invention relates to a triazole-based polymer colloid composite catalyst, a preparation method thereof, and an application thereof. The composite catalyst is a metal nanoparticle supported by a 1,2,4-triazole-based polymer colloid. For the first time, the present invention successfully loads HEA-NPs at room temperature through the interaction between polycarbene sites and metals. The obtained catalyst system has good performance in stabilizing alloy metal nanoparticles and exhibits excellent catalytic performance in the dehydrogenation reaction of ammonia borane. The process adopted in the present invention is simple, the equipment is simple, the operation is simple, the conditions are mild, and the catalyst is easy to separate and recycle.

The application discloses a preparation method of a sea urchin-shaped Co3O4 / CuO three-dimensional hierarchical nanostructure, which comprises the following steps: (1) a certain amount of urea is dissolved in water to form a uniform solution by stirring; (2) soluble divalent copper salt and divalent cobalt salt are added into the solution in a certain proportion to form a mixed solution A, and stirring is carried out for 5-15 min; (3) the solution is transferred into a 100mL reaction kettle, and reaction is carried out at 100-140 DEG C for 4-18h; and (4) filtration and washing are carried out, and the collected solid is reacted in a tubular furnace under a nitrogen atmosphere at 300-400 DEG C for 2-6h. The hydrothermal synthesis method is adopted, raw materials are firstly mixed in a certain proportion, urea is used as a homogeneous precipitant, a precursor is generated under the condition that urea exists, and then the Co3O4 / CuO composite is synthesized through calcination. The whole preparation process is simple in operation, environment-friendly, very good in experimental reproducibility, low in cost and easy for industrial production, and the Co3O4 / CuO composite prepared by the method has very high catalytic activity in the ammonia borane alcoholysis hydrogen production reaction.

The application discloses alkylated hydrogen-rich vehicle fuel and a preparation method thereof, the raw material of the alkylated hydrogen-rich vehicle fuel comprises methanol, hydrogen activation release aids, polyisobutylene succinimide and di-tert-butyl peroxide; the production process comprises the following steps: preparation of hydrogen activation release aids, preparation of a primary catalyst, heat treatment and alkylation reaction of methanol, primary catalysis and secondary catalysis of methanol derivatives; the hydrogen-rich fuel production is integrated into a three-stage series process of methanol alkylation, primary catalysis dehydration and deoxidation and secondary catalysis reforming, and the problems of long traditional process flow, high risk of high temperature and high pressure, and serious hydrogen loss are overcome; the decyl trimethyl ammonium bromide-ammonia borane nano microsphere aid is prepared, the cleaner and the antioxidant are integrated, the controllable hydrogen release at high temperature, the stable storage at normal temperature, the oxidation inhibition and the carbon deposition inhibition are realized, and the fuel performance is improved; the multi-element synergistic catalyst is prepared, the acid site is regulated, the metal is anchored and the pore channel is constructed, and the high methanol conversion is realized.

The invention discloses a catalyst for producing hydrogen through catalytic decomposition of ammonia borane as well as a preparation method and application of the catalyst, and belongs to the technical field of catalytic functional materials and hydrogen energy. According to the technical scheme, the catalyst for producing the hydrogen through catalytic decomposition of the borane ammonia is composed of Ag and CoWO4, the mass ratio x of the Ag to the CoWO4 is 1%-5%, and the catalyst can achieve efficient catalytic decomposition of the borane ammonia to produce the hydrogen under the condition of the low Ag loading ratio and can be applied to various NaOH concentration conditions and solvent systems with different compositions. The invention also specifically discloses a preparation method of the catalyst for producing hydrogen through catalytic decomposition of ammonia borane and application of the catalyst for producing hydrogen through catalytic decomposition of ammonia borane. The preparation method of the catalyst for producing hydrogen through catalytic decomposition of ammonia borane is simple, the cost is relatively low, and industrial scale-up production and practical application of the catalyst in the field of producing hydrogen through catalytic decomposition of ammonia borane are convenient to realize.

The invention belongs to the technical field of ammonia borane hydrolysis hydrogen desorption, and discloses a Co-Co3B interface double-active-site modified wood charcoal catalyst as well as a preparation method and application thereof. The catalyst is of a core-shell structure and takes BNC as a shell and a Co-Co3B heterostructure as a core; the catalyst has double active sites: Co nanoparticles and Co3B nanoparticles, and an interface structure exists between Co and Co3B; wherein the BNC is boron nitride modified wood charcoal and has a porous structure. The Co-Co3B interface double-active-site modified wood charcoal catalyst is creatively designed, the existence of a BNC shell not only avoids catalyst deactivation but also limits agglomeration of metal particles, the introduction of Co3B increases active sites, meanwhile, an interface structure also exists between Co and Co3B, the electronic structure and coordination environment of the catalyst are optimized, and the catalytic activity of the catalyst is improved. Compared with the prior art, the catalyst provided by the invention has the advantages that the dissociation energy barrier of reactant molecules is reduced, the catalytic activity is improved, the catalyst has excellent catalytic performance in an NH3BH3 hydrolysis reaction performance test, and the hydrogen production rate of the catalyst reaches 10492 mL. Min <-1 >. GCo <-1 >.

The invention discloses an alkylated hydrogen-rich vehicle fuel and a preparation method thereof. The alkylated hydrogen-rich vehicle fuel comprises the following raw materials: methanol, a hydrogen activation release auxiliary agent, polyisobutylene succinimide and di-tert-butyl peroxide. The production process comprises the following steps: preparation of a hydrogen activation release auxiliary agent, preparation of a primary catalyst, heat treatment and alkylation reaction of methanol, and primary catalysis and secondary catalysis of a methanol derivative. Hydrogen-rich fuel production is integrated into a three-section series flow of methanol alkylation, first-stage catalytic dehydration and deoxidation and second-stage catalytic reforming, and the problems that a traditional technological process is tedious, high in high-temperature and high-pressure risk and serious in hydrogen loss are solved; the decyl trimethyl ammonium bromide-ammonia borane nano-microsphere auxiliary agent is prepared, a cleaning agent and an antioxidant are integrated, controlled release of hydrogen at high temperature and stable storage at normal temperature are realized, oxidation is inhibited, deposited carbon is removed, and the fuel performance is improved; a multi-element synergistic catalyst is prepared, acid sites are regulated and controlled, metal is anchored, pore channels are constructed, and high conversion of methanol is achieved.

The invention belongs to the technical field of catalysts, and particularly relates to a Ni-MoOx / HTO nano-catalyst and a preparation method and application thereof. The method comprises the following steps: uniformly mixing Cs2CO3 and TiO2, grinding and calcining to obtain CsTO powder; then dispersing in water, adding a hydrochloric acid solution for reaction, filtering, washing and drying to obtain an HTO carrier; the preparation method comprises the following steps: dispersing an HTO carrier in water, then adding NiCl2. 6H2O and Na2MoO4. 2H2O, and carrying out ultrasonic treatment to obtain a suspension; and adding a reducing agent into the suspension to carry out reduction reaction until no bubble is generated, thereby obtaining the Ni-MoOx / HTO nano-catalyst. The catalyst shows excellent catalytic performance and excellent cycle stability in the reaction of hydrogen production through hydrolysis of ammonia borane, and the conversion frequency (TOF) of the catalytic reaction at 298 K under the condition of no additive reaches 143.9 min <-1 >.

The invention relates to a preparation method of a high-entropy ceramic support composite conductor material, which specifically comprises the following steps: taking various metal alkoxides as raw materials, carrying out sol-gel reaction and spray drying to obtain gel precursor microspheres, and carrying out high-temperature nitriding treatment to form a high-entropy nitride hollow microsphere three-dimensional ceramic skeleton structure; then, the low-melting-point gallium-based liquid metal alloy is infiltrated and filled into the ceramic framework by adopting pulse ultrasound and air pressure circulation means, and a closed and continuous conductive channel is constructed; interface bonding between the metal and the ceramic is realized through vacuum heat treatment; further spraying a silver nitrate aqueous solution and carrying out microwave reduction to form silver nano catalytic sites in situ, and finally inducing growth of boron nitride nanotubes with consistent orientation in an ammonia borane atmosphere to form a protective layer with a thermal diffusion function; the obtained composite conductor has good conductivity, thermal stability and structural integrity, and is suitable for the field of high-current-carrying-density power transmission.

The invention relates to the technical field of postharvest preservation of agricultural products, in particular to a fresh-keeping method and a fresh-keeping agent for fresh ginger based on a slow-release hydrogen technology. According to the method, the fresh ginger is treated by using a hydrogen release system consisting of ammonia borane and an iron-based catalyst as the fresh-keeping agent; the iron-based catalyst is ferric chloride and / or ferric chloride hydrate, and the addition amount of the iron-based catalyst is 3-10% of the molar weight of the ammonia borane; and the concentration of the ammonia borane in the hydrogen release system is 0.1-0.4 mol / L. The treatment method comprises the following steps: soaking the fresh ginger in the hydrogen release system aqueous solution, draining and storing. Cheap and easy-to-obtain ferric chloride is used for driving ammonia borane to realize slow and controllable hydrolysis hydrogen release for the first time, and a stable hydrogen-rich hydrogen regulation environment is created for fresh ginger storage, so that the hardness of fresh ginger is effectively maintained, the weight loss rate is reduced, membrane lipid peroxidation is inhibited, an antioxidant system of fresh ginger is activated, multi-dimensional aging is delayed, and the shelf life of fresh ginger is prolonged. The method has the advantages of low cost, simple operation, safety and environmental protection.

The application discloses a Pincer ligand rare earth metal catalyst and a preparation method thereof, and application of the Pincer ligand rare earth metal catalyst in preparation of primary amine borane compounds and secondary amine compounds. The Pincer ligand rare earth metal catalyst can be bonded with a nitrogen atom in a borane ammonia complex, thereby activating a B-H bond, so that the preparation of the primary amine borane compounds and the secondary amine compounds can be completed by using the borane ammonia complex. Compared with pinacol borane (HBpin), the borane ammonia complex (H3NBH3) has the characteristics of high stability, small toxicity and convenient storage as a boron source, and can reduce energy consumption and be environment-friendly in the reaction. In addition, the Pincer ligand rare earth metal catalyst has the advantages of simple source, small dosage and low preparation difficulty.

The present invention relates to the technical field of catalysts, and discloses a yolk / shell-type CoxCu1-xCo2O4@CoyCu1-yCo2O4 catalyst as well as a preparation method and application thereof to catalytic hydrogen generation. The preparation method of the yolk / shell-type CoxCu1-xCo2O4@CoyCu1-yCo2O4 catalyst includes the steps of: successfully synthesizing, by applying a hydrothermal synthesis method, a [Co(C6H12N4)2](NO3)2 solid sphere complex from a cobalt salt and hexamethyleneteramine serving as an alkali source; and then, performing calcination to obtain a yolk / shell-type Co3O4 microsphere structure, adsorbing Cu2+ on a surface in a physical adsorption manner, and performing calcination again to form yolk / shell-type CoxCu1-xCo2O4@CoyCu1-yCo2O4. The preparation method is simple, raw materials are cheap and available, and the prepared yolk / shell-type CoxCu1-xCo2O4@CoyCu1-yCo2O4 catalyst is high in purity, good in catalysis performance and capable of showing excellent catalytic activity in term of ammonia borane catalytic hydrolysis for hydrogen generation.

The application discloses a superfine cobalt phosphide nanocluster / carbon composite catalyst, a supported catalyst and a preparation method and application thereof, and belongs to the field of liquid hydrogen storage and nanometer catalyst preparation. A mild low-temperature 300-400 DEG C in-situ heat treatment strategy is adopted, so that the growth and agglomeration of metal nanometer particles under high temperature are avoided. The average size of the prepared superfine cobalt phosphide nanocluster can reach 4.40+ / -1.3 nm, the extremely small size provides a larger electrochemical active specific surface area, and catalytic active sites are fully exposed. Under the condition of 30 DEG C, the catalyst shows super-high catalytic activity for ammonia borane hydrolysis, and the conversion efficiency TOF is as high as 1188 h ‑1 , and the performance is far higher than that of most reported non-noble metal catalysts.

The invention discloses a carbon-doped tin dioxide loaded platinum-copper-nickel / cobalt catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysis. The preparation method comprises the following steps: firstly, mixing a carbon source, a tin source and water for hydrothermal reaction to obtain a carbon-doped tin dioxide carrier precursor; calcining the precursor at different temperatures to obtain a carbon-doped tin dioxide carrier; and then loading metals platinum, copper and nickel / cobalt on the carrier by a step-by-step impregnation reduction method, and reducing by using a reducing agent to convert the metal platinum into single atoms, thereby obtaining the carbon-doped tin dioxide loaded platinum-copper-nickel / cobalt catalyst. The preparation method provided by the invention is simple and easy to operate, the monatomic platinum has relatively high activity, and meanwhile, the carbon-doped tin dioxide carrier has relatively high bonding performance with water and is beneficial to desorption of hydrogen, so that the catalyst has relatively high catalytic activity and is suitable for industrial production. The catalyst can be applied to hydrogen production through hydrolysis of ammonia borane.