100 results about "Hydrogen desorption" patented technology

The invention relates to a Y-doped Ti-Mn-based solid hydrogen storage alloy and a preparation method thereof, belongs to the technical field of hydrogen storage alloy materials, and has the advantages of easiness in activation, high hydrogen absorption and desorption speed, moderate hydrogen absorption and desorption plateau pressure and long cycle life. The invention provides a Y-doped Ti-Mn-based hydrogen storage alloy, which is characterized in that the chemical general formula of the hydrogen storage alloy is Ti1-x-yYxZryMn2-w-vVwFev, in the formula, x, y, w and v represent atomic ratios, 0.02 < = x < = 0.08, 0.05 < = y < = 0.15, 0.3 < = w < = 0.5, and 0.1 < = v < = 0.2. The hydrogen storage alloy is excellent in hydrogen storage performance and can be completely activated by absorbing hydrogen for the first time under the conditions of 25 DEG C and 3 MPa, the hydrogen storage capacity is larger than or equal to 1.90 wt%, the hydrogen absorption plateau pressure is larger than or equal to 0.35 MPa, the hydrogen desorption plateau pressure is smaller than or equal to 0.26 MPa, and the hydrogen absorption retention rate of the alloy is larger than or equal to 97.52% after the alloy is cycled for 1000 times.

The invention belongs to the technical field of hydrogen storage, and particularly relates to a vehicle-mounted hydrogen storage device and a hydrogen absorption and desorption method thereof. A vehicle-mounted hydrogen storage device comprises a hydrogen storage reactor arranged in a vehicle-mounted high-pressure container and filled with vanadium-based hydrogen storage alloy; the refrigerating system is used for providing a first fluid medium for the solid hydrogen storage reactor in a hydrogen absorption process so as to cool the hydrogen storage reactor to a preset hydrogen absorption temperature; the heating system is connected with a waste heat source of a vehicle-mounted engine and used for providing a second fluid medium for the hydrogen storage reactor in the hydrogen desorption process so as to heat the hydrogen storage reactor to the preset hydrogen desorption temperature; and the fluid conveying loop comprises a pipeline and a valve and is used for selectively communicating the refrigerating system or the heating system with the hydrogen storage reactor so as to convey the first fluid medium or the second fluid medium.

The invention relates to a solid hydrogen storage bottle with an internal heat exchange coupling heat pipe, which comprises a bottle body, a heat conduction part and a gas guide part, the heat conduction part is movably arranged in the bottle body, and a material storage cavity is formed in the bottle body; the air guide part keeps the material storage cavity communicated with the outside of the bottle body in the moving process; wherein the gas guide part synchronously moves along with the heat conduction part, and the heat conduction part keeps the hydrogen absorption material deviating from the gas guide part in the static process. The heat conduction part is movably arranged in the bottle body, so that when the heat conduction part moves, the hydrogen absorption material is thrown away from the gas guide part, the material cannot escape outwards, smooth flowing of hydrogen is kept, the number of the storage cavities is not limited by the structure, the multiple storage cavities can be arranged, the hydrogen absorption material is fully separated, and the hydrogen absorption effect is improved. And the whole structure keeps a good heat conduction effect on the hydrogen absorption material, and meanwhile, sufficient flow of hydrogen between the inside and the outside is ensured, so that the hydrogen absorption and hydrogen desorption efficiency is effectively ensured.

The utility model discloses a hydrogen storage and supply device and a hydrogen fuel cell heat and power cogeneration system, and relates to the technical field of fuel cells. The hydrogen storage and supply device realizes normal-temperature and normal-pressure storage of hydrogen on the basis of a liquid organic matter hydrogen storage technology, and the principle is that hydrogen storage is realized by virtue of reversible reaction and hydrogenation reaction of unsaturated liquid organic matters such as olefin, alkyne or aromatic hydrocarbon and hydrogen, and hydrogen release is realized by virtue of dehydrogenation reaction. According to the liquid organic matter hydrogen storage technology, the hydrogen storage density is 5%-10%, and the hydrogen storage amount is large; and the hydrogen storage carrier is a liquid organic matter, normal-temperature and normal-pressure transportation can be achieved, convenience and safety are achieved, the requirement for the hydrogen liquid tank is low, and hydrogen leakage is basically avoided during transportation. And during dehydrogenation reaction, the temperature required by hydrogen desorption is low, the energy consumption is low, the hydrogen desorption rate is adjustable, and the hydrogen desorption device can be adapted to various hydrogen fuel cells. The hydrogen fuel cell heat and power cogeneration system collects and utilizes the lost heat of the cell, so that the comprehensive utilization rate of the hydrogen fuel cell is improved.

The invention discloses a magnesium-based solid hydrogen storage tank integrated with a resistance heating and electromagnetic coupling magnetic field structure, which comprises a tank body and a control cabinet integrated on the outer side wall of the tank body, a plurality of electrode plates are arranged in the tank body, and the electrode plates are electrically connected with a power supply cabinet on the side wall of the tank body through tabs on the electrode plates. The inner space of the tank body is divided into a plurality of hydrogen storage spaces by the plurality of electrode plates, magnesium-based solid hydrogen storage materials containing magnetic alloy metal and carbon materials are added into the hydrogen storage spaces through material adding ports formed in the outer side wall of the tank body, a temperature sensor is arranged in each hydrogen storage space, and a pressure sensor is arranged at the top of the tank body; a hydrogen inlet / outlet is formed in the top end of the tank body; a communicating hole for communicating two adjacent hydrogen storage spaces is formed in the center of the electrode plate. Through the synergistic effect of an electric field and a magnetic field, the thermal management performance of the magnesium-based hydrogen storage material is effectively improved, the hydrogen desorption cold start time is shortened, the thermal effect influence in the hydrogen charging and desorption process is reduced, stress concentration caused by volume expansion is relieved, and the hydrogen storage and release performance of the magnesium-based material is improved.

The invention provides an extended-range solid hydrogen storage hydrogen fuel cell hydrogen thermal coupling power system, which comprises a proton exchange membrane hydrogen fuel cell power generation module used for converting hydrogen and oxygen into electric energy through electrochemical reaction; the alloy solid hydrogen storage and supply module is used for storing hydrogen in a low-pressure safe and high-density manner, releasing heat during hydrogen charging and exchanging heat with external cooling fluid; heat is absorbed during hydrogen desorption and exchanges heat with waste heat of the hydrogen fuel cell, so that hydrogen-heat coupling in the hydrogen supply process is realized; and the hydrogen thermal coupling thermal management module is used for transferring waste heat of the fuel cell to the solid hydrogen storage device so as to support the hydrogen desorption and heat absorption process of the solid hydrogen storage device. The technical problem of alloy solid hydrogen storage in hydrogen supply stability is solved, gas hydrogen can be stably and rapidly supplied to a fuel cell under the working conditions of vehicle starting, climbing or rapid power increasing and the like, power output stability of a system is maintained, and the strict requirement of the traffic power field for power performance is met.

The utility model provides a solid hydrogen storage system, which comprises a hydrogen storage module, a waste heat recovery module and a waste heat export module, and the hydrogen storage module is respectively connected with a hydrogen source and a user side and is used for storing and releasing hydrogen; the waste heat recovery module is connected to the hydrogen storage module and can recover heat released in the hydrogen filling stage and store the heat through a heat storage working medium. The waste heat leading-out module is connected to the waste heat recovery module, heat stored by the waste heat recovery module is released and utilized, the waste heat leading-out module can be connected with the hydrogen storage module to serve as a heat source in the hydrogen desorption stage, and the waste heat leading-out module can also be connected with other systems with heat energy requirements. Waste heat in the hydrogen charging process is recycled, energy waste is avoided, efficient utilization of energy is achieved through system circulation, the conversion efficiency of a fuel cell can be fully exerted, good market applicability is achieved, the stored waste heat can serve as a heat source to be used for various ways, and the system is simple in overall structure, low in cost, high in practicability and suitable for popularization and application. The application range is wide.

The invention discloses a hydrogen desorption system and method of a magnesium-based solid hydrogen storage reaction kettle, a hydrogen storage tank is placed in each placement position in an inner cavity of the reaction kettle, and each placement position is provided with a heat exchange coil pipe; the hydrogen desorption system comprises a hydrogen desorption part, a temperature control part and a safety protection part; the hydrogen desorption part comprises a hydrogen desorption main pipeline, a hydrogen desorption automatic switch valve is arranged on the hydrogen desorption main pipeline, and a vacuumizing pipeline is connected to the hydrogen desorption main pipeline in parallel; the temperature control part comprises an external heat-conducting oil circulating system, a flow bypass pipeline is arranged between the oil inlet pipeline and the oil return pipeline in a crossing manner, and a heat-conducting oil shunting automatic switch valve is arranged on the flow bypass pipeline; the safety protection part comprises a reaction kettle safety valve arranged on the reaction kettle, the reaction kettle safety valve is externally connected with an emptying pipeline, a pressure relief bypass pipeline is arranged between the emptying pipeline and the hydrogen desorption main pipeline in a crossing mode, and an automatic opening and closing pressure relief valve is arranged on the pressure relief bypass pipeline. The reaction kettle has the advantages that rapid and efficient hydrogen desorption of a plurality of hydrogen storage tanks in the reaction kettle is realized, and the system safety is ensured.

The application discloses a kind of catalyst doped magnesium-based hydrogen storage materials and preparation method thereof, belong to hydrogen storage material and its preparation technical field.The application improves the hydrogen absorption and desorption kinetics of existing magnesium-based hydrogen storage material, reduces its hydrogen desorption activation energy, and solves the problem of poor cycle stability.The application uses Cu (NO3) 2·H2O and H3BTC raw materials to prepare catalyst with porous structure, and dopes it in magnesium-based hydrogen storage material by ball milling technology, utilizes the porous structure of catalyst to avoid the agglomeration of active material during hydrogen absorption and desorption process, and the introduced metal can be used as catalytic site to improve the hydrogen absorption and desorption kinetics of magnesium-based hydrogen storage material Mg 85 Ni 10 La 4.5 Y 0.5 Desorption activation energy.

The invention relates to an RE-Mg-Ni-based hydrogen storage alloy containing double rare earth elements and a preparation method of the RE-Mg-Ni-based hydrogen storage alloy, belongs to the technical field of solid hydrogen storage alloy materials, and solves at least one of the problems that an existing Mg-based hydrogen storage alloy hydride is high in hydrogen desorption activation energy, slow in hydrogen absorption and desorption dynamics and low in hydrogen storage capacity. The chemical formula of the hydrogen storage alloy is Mg96-xLa4-yYyNix, x is greater than or equal to 2 and less than or equal to 6, and y is greater than or equal to 1 and less than or equal to 3; the grain size of the hydrogen storage alloy is 0.81-1.69 [mu] m, and the volume fraction of a precipitated phase is 20-40%. The elements La, Ni and Y are adopted to replace the element Mg, the grain size is refined, the crystal defect of alloy particles is improved, the phase structure is improved, the hydrogen desorption enthalpy change and the hydrogen absorption and desorption temperature are reduced, and the hydrogen absorption and desorption rate is increased; the alloy ingot is subjected to rapid quenching and recrystallization annealing treatment, so that the alloy grain structure is further refined, precipitation and uniform distribution of a phase state are promoted, more channels and nucleation sites are provided for hydrogen atoms to enter the alloy, the hydrogen absorption and desorption rate is increased, and the alloy hydride activation energy is further reduced.

This invention provides a catalyst for hydrogen storage materials, its preparation method, and its application. The catalyst comprises CeO2 nanorods and transition metal nanoclusters supported on the CeO2 nanorods; the transition metal nanoclusters include any two of Ni, Pd, Co, or Mn elements. In this catalyst, the CeO2 nanorods can form a strong metal-support interaction with the transition metal nanoclusters, synergistically improving the hydrogen storage kinetics of MgH2 material. Simultaneously, the transition metal nanoclusters containing two of the aforementioned elements can effectively improve the hydrogen absorption / desorption performance of MgH2. Therefore, by combining this catalyst with MgH2 material, the hydrogen desorption temperature of MgH2 can be reduced, the hydrogen absorption / desorption kinetics of MgH2 can be improved, and the cycling performance can be enhanced.

The invention discloses a vehicle-mounted high-mass-density hydrogen storage device and application thereof, tubular reactors are filled with hydrogen storage materials with weak adsorption effects to form tubular hydrogen storage units, and a plurality of tubular reactors are arranged in parallel to form the high-mass-density hydrogen storage device; meanwhile, the tubular reactor serves as a tube pass, an outer shell of the hydrogen storage device serves as a shell pass, a heat exchange medium is guided into the shell pass, so that the hydrogen storage module is located in a set and uniform temperature field, heat management in the hydrogen absorption / desorption process is enhanced, and stable hydrogen storage and supply are achieved. The method effectively reduces the bed temperature difference and the heat management burden by using the high mass density hydrogen storage potential of the weak adsorption effect hydrogen storage material and the characteristic of relatively mild heat effect brought by lower enthalpy change, and reduces the heat and mass transfer resistance of the bed by combining the material forming and filling and heat conduction enhancing modes, thereby improving the heat transfer efficiency. Stable hydrogen storage and supply under low-temperature hydrogen absorption and medium-temperature hydrogen desorption windows are achieved, the structure is compact, modular capacity expansion can be achieved, maintenance is convenient, and the vehicle-mounted hydrogen storage and supply device is suitable for vehicle-mounted hydrogen supply scenes.

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.

A hydrogen storage alloy containing zirconium, a method for producing the same and use of zirconium are disclosed. The hydrogen storage alloy has a content of A2B7 phase > 50 wt% and a composition as shown in formula (I): La m RE n Y p Zr q Ni a Mn b A c (I); wherein RE is selected from one or more of Ce, Pr, Nd, Sm and Gd; A is selected from one or more of Al, V, Cu, Fe and Co; wherein m, n, p, q, a, b and c represent the mole fraction of each element, respectively; m is in the range of 0.5-3, n is in the range of 0-2, p is in the range of 1-4, q is in the range of 0.2-2.5, a is in the range of 19-20.5, b is in the range of 0.4-1.2, and c is in the range of 0-0.5. The hydrogen storage alloy has a high hydrogen desorption plateau pressure.

The invention discloses a self-powered four-electrode hydrogen evolution device and application thereof.The self-powered four-electrode hydrogen evolution device comprises an acid-base asymmetric electrolyte formaldehyde-proton fuel cell, the acid-base asymmetric electrolyte formaldehyde-proton fuel cell comprises an anode, a cathode, an anolyte and a catholyte, the anode and the cathode both adopt ruthenium-doped copper nanotube electrodes, the anolyte is a mixed solution of potassium hydroxide and formaldehyde, and the catholyte is a mixed solution of potassium hydroxide and formaldehyde; the cathode electrolyte is a sulfuric acid solution; the formaldehyde-assisted water desorption hydrogen desorption electrolytic tank comprises an anode, a cathode, an anolyte and a catholyte, the anode and the cathode both adopt ruthenium-doped copper nanotube electrodes, the anolyte is a mixed solution of potassium hydroxide and formaldehyde, and the catholyte is a potassium hydroxide electrolyte; wherein the cathode and the anode of the acid-base asymmetric electrolyte formaldehyde-proton fuel cell are respectively connected with the anode and the cathode of the electrolytic tank. According to the invention, self-powered four-electrode hydrogen evolution without external voltage input is realized, 400% of hydrogen evolution Faraday efficiency can be obtained, and meanwhile, a high-value product formate is also obtained.

The invention discloses a PtNiCo nano-particle loaded carbon fiber self-supporting efficient hydrogen evolution catalytic material which is prepared by adopting electrostatic spinning, titration and Joule thermal shock technologies, PtNiCo nano-particles are uniformly dispersed on high-conductivity NiCo / CNFs, and interface charge redistribution induced electronic metal-carrier interaction between the PtNiCo nano-particles and the high-conductivity NiCo / CNFs can realize catalytic hydrogen evolution. The hydrogen desorption kinetics of the alloy part is optimized, and the hydrogen overflow effect is triggered, so that the hydrogen precipitation is promoted. According to the prepared catalytic material, the catalytic performance can be remarkably improved while precious metal is reduced, and the catalytic material has excellent HER catalytic activity in alkaline electrolyte and has good stability and durability.

The solid hydrogen storage heat management system comprises a thermocline energy storage tank, a solid hydrogen storage tank, a heat pump and a switching valve unit, and the thermocline energy storage tank is provided with a hot water area and a cold water area which are used for storing heat exchange media; the hot solid hydrogen storage tank is communicated with the thermocline energy storage tank and the heat pump through an outer circulation pipeline, the heat pump comprises a first heat exchanger, a second heat exchanger, a third heat exchanger and an inner circulation pipeline unit for flowing refrigerants, and the inner circulation pipeline unit comprises two stages of inner circulation pipelines; the heat pump is selectively started during hydrogen storage or hydrogen desorption according to the temperature of a heat exchange medium heat source or cold source; the switching valve unit is arranged on the outer circulation pipeline and used for switching the flowing path of the heat exchange medium according to the working conditions. According to the solid hydrogen storage thermal management system and the thermal management control method, through the cascade heat pump, the temperature difference of the heat exchange media at the two ends of the heat pump is increased, the response speed for the external temperature is increased, the energy consumption is reduced, and the hydrogen storage or hydrogen desorption efficiency is improved.

The invention discloses a derived carbon coated Mg-Ni-Ce hydrogen storage alloy. The phase composition after activation and carbonization treatment is an Mg phase, an Mg2Ni phase and a CeHx phase; the content of Mg is 80 to 84 wt.%, the content of Ni is 4 to 8 wt.%, the content of Ce is 10 to 14 wt.%, and the content of the PMMA polymer is 1 to 5 wt.%. The preparation method comprises the following steps: 1, preparing a PMMA coated Mg-Ni-Ce alloy precursor; and 2, preparation of the derived carbon coated Mg-Ni-Ce hydrogen storage alloy. When the alloy is used as a hydrogen storage alloy, under the hydrogen condition, the maximum hydrogen absorption amount reaches 5.40-5.60 wt.%, and the hydrogen desorption amount reaches 5.20-5.40 wt.%. After simulated poisoning treatment under the P atmosphere condition, the hydrogen absorption amount reaches 4.60-4.80 wt.%, and the hydrogen desorption amount reaches 4.0-4.20 wt.%.

This invention discloses a method for preparing a Mg-Ni-based hydrogen storage alloy containing rare earth elements, belonging to the technical field of hydrogen storage alloy materials and their preparation. This invention solves the problems of activation and limited hydrogen storage capacity in existing hydrogen storage materials. This invention uses the rare earth element La to modify the Mg-Ni-based hydrogen storage alloy, resulting in a significant improvement in the hydrogen storage performance of the modified Mg-Ni-La hydrogen storage alloy. Furthermore, based on the Mg-Ni-La alloy, La is substituted with the rare earth element Y, and the alloy's kinetic properties are enhanced by adjusting the content of rare earth elements Y and La, while simultaneously increasing the alloy's hydrogen storage capacity. The peak hydrogen desorption temperature of the substituted hydrogen storage alloy is reduced to 273℃, and the hydrogen storage capacity is 4.645 wt.% at 220℃ and 5MPa.

A self-adaptive temperature control system and method for a hydrogen-cooled generator set based on metal hydrogen storage belongs to the technical field of hydrogen-cooled generator sets and comprises a hydrogen-cooled generator set body, a metal hydrogen storage device, an outer circulation pipeline and a heat dissipation device. The outer circulation pipeline is respectively connected with the hydrogen-cooled generator set body and the metal hydrogen storage device to form a closed-loop circulation loop; the metal hydrogen storage device utilizes the characteristics of high-temperature hydrogen desorption and low-temperature hydrogen absorption and is matched with the heat dissipation device to achieve dynamic adjustment of the hydrogen circulation amount, and then self-adaptive temperature control is conducted on the hydrogen-cooled generator set body. A hydrogen production machine and a high-pressure hydrogen storage tank are omitted, the working pressure of the metal hydrogen storage device is smaller than 3 MPa, and the metal hydrogen storage device belongs to a medium-pressure container and has no high-pressure explosion risk; the device can move flexibly, a special safety isolation distance is not needed, hydrogen is only circulated in a closed loop, and the leakage risk is extremely low; a special operation license is not needed in the maintenance process, and the manual operation risk is reduced.

The invention discloses a preparation method of a functionalized palladium quantum dot loaded bismuth ferrite nanorod piezoelectric catalytic hydrogen evolution material, and belongs to the technical field of new energy catalytic materials. According to the invention, a palladium quantum dot loaded bismuth ferrite nanorod (Pd-BFO) cocatalyst is constructed by a simple method of electrostatic spinning and chemical reduction. The material can be used as a mechanical energy and chemical energy conversion platform and is used for efficient piezoelectric catalytic hydrogen evolution reaction. Under ultrasonic irradiation, the strong piezoelectric response of bismuth ferrite can induce ferroelectric polarization, and a built-in polarization field is formed to separate charges. Palladium quantum dots serve as a cocatalyst, transfer and enrichment of polarized charges can be promoted, the charge separation efficiency is improved, meanwhile, water adsorption and hydrogen desorption energy barriers are optimized, and therefore the piezoelectric catalytic hydrogen evolution activity is remarkably improved. The 0.5 wt% Pd-BFO material obtained through optimization can achieve the excellent hydrogen evolution rate of 4253.44 [mu] mol.g <-1 >. H <-1 >, and the performance of the Pd-BFO material is superior to that of most reported piezoelectric catalysts at present.

The invention relates to a magnesium-based hydrogen storage material and a preparation method thereof, and belongs to the technical field of hydrogen storage alloy materials and preparation thereof. The hydrogen storage material is an Mg-5Ni alloy with Sm powder uniformly distributed on the surface layer and an amorphous / nanocrystalline structure in the interior. The Sm powder is wrapped by the surface layer of the Mg-5Ni alloy to form composite powder of a core-shell structure; the hydrogen storage material is prepared from Mg-5Ni alloy powder and Sm powder as raw materials, and the raw materials are mixed and then subjected to dry ball milling. The hydrogen absorption and desorption kinetics of the existing magnesium-based hydrogen storage material can be effectively improved, the hydrogen desorption activation energy of the magnesium-based hydrogen storage material is reduced, and the problem that a solid additive is difficult to uniformly distribute on the surface is solved.

This invention relates to the field of hydrogen production catalyst technology, and in particular to a Ru / Co-Sm catalyst. 2 O 3 Composite catalysts, their preparation methods, and applications. This catalyst uses Co-Sm... 2 O 3 As a carrier, Ru is loaded on the carrier; the Ru / Co-Sm 2 O 3 The Ru loading in the composite catalyst ranged from 2.4 to 7.1 wt.%. This was achieved by loading Ru onto the heterostructure Co-Sm... 2 O 3 Obtained on a carrier. This Ru / Co-Sm 2 O 3 Composite catalysts possess mesoporous structures and abundant specific surface areas, resulting in numerous exposed active sites, making them highly catalytically active in hydrogen desorption from water. This invention employs a simple preparation method, utilizing a straightforward hydrothermal synthesis, a metal-organic framework pyrolysis strategy, and an in-situ reduction loading method to successfully prepare a novel Co and Sm... 2 O 3 Nonmetallic element co-doped heterostructure Ru / Co-Sm 2 O 3 Composite material catalysts.

The invention relates to a solid-state hydrogen storage device and method, and the device comprises a solid-state hydrogen storage unit which comprises a solid-state hydrogen storage module, a solid-state hydrogen storage hot water unit and a solid-state hydrogen storage cold water unit; the water electrolysis hydrogen production unit comprises an electrolyte tank and a discharge electrode, and the discharge electrode is electrically connected with the power supply unit; the heat removal unit is used for transferring the heat of the electrolytic hydrogen production reaction in the electrolyte in the electrolyte tank to the solid hydrogen storage hot water unit; the hydrogen output end of the solid hydrogen storage module is connected with the hydrogen utilization unit; and the control unit is electrically connected with the solid-state hydrogen storage module, the solid-state hydrogen storage hot water unit, the solid-state hydrogen storage cold water unit, the water electrolysis hydrogen production unit and the heat removal unit, and is used for dynamically regulating and controlling the hydrogen absorption process and the hydrogen desorption process of the solid-state hydrogen storage module and the electrolysis hydrogen production reaction of the water electrolysis hydrogen production unit. The method has the advantages of being low in energy consumption, safe and green, and the problem that the fluctuation characteristic of new energy power generation contradicts with the stability requirement in the operation process of the hydrogen utilization unit is solved.

The invention discloses a titanium-manganese solid hydrogen storage material and a preparation method thereof. The material is prepared from the following raw materials in parts by weight: 100 parts of TiZrVFeMn alloy powder, 4 to 15 parts of Ti-coated CNTs and 1.9 to 7.6 parts of nickel-loaded iron antioxidant MXene, the TiZrVFeMn alloy powder is prepared from, by mass, 21%-25% of Ti, 1.5%-4.2% of Zr, 7%-14% of V, 1.4%-3.5% of Fe and the balance Mn. According to the preparation method, the nickel-iron-loaded antioxidant MXene is added into the TiZrVFeMn alloy powder, on one hand, the hydrogen storage density can be improved and the hydrogen desorption performance can be improved by means of the two-dimensional layered structure of the nickel-iron-loaded antioxidant MXene, and on the other hand, the oxidation resistance of the hydrogen storage alloy can be effectively improved by means of the reduction performance provided by the hybridized Ti3C2 quantum dots on the nickel-iron-loaded antioxidant MXene; the problems of surface poisoning and difficult activation caused by oxidation of the titanium-manganese hydrogen storage alloy are solved, and the cycle life of the titanium-manganese hydrogen storage alloy is prolonged.

The invention relates to the field of urban hydrogen energy conversion, and discloses an air conditioning system adopting a solid hydrogen storage technology. The air conditioning system based on the solid-state hydrogen storage technology comprises a control subsystem, a hydrogen production and purification subsystem, a solid-state hydrogen storage heat exchange subsystem and a fuel cell subsystem, and the urban hydrogen energy conversion process is promoted by utilizing the high safety characteristics of low operation pressure and hydrogen absorption and heat release / hydrogen desorption and heat absorption of the solid-state hydrogen storage technology; and the characteristic of hydrogen absorption and heat release / hydrogen desorption and heat absorption is utilized to enter the air-conditioning field, so that the dependence of an air-conditioning technology on a compressor is eliminated, and simultaneous flowering of two racing tracks in one technology is realized.

The invention relates to the technical field of hydrogen storage and release, in particular to a hydrogen storage and release system for a low-saturated vapor pressure liquid hydrogen storage carrier, which comprises a heat exchange unit, a feeding and discharging unit, a hydrogen storage unit, a hydrogen release unit and a separation unit, the heat exchange unit is connected with the hydrogen storage unit, the hydrogen desorption unit and the separation unit through pipelines and used for adjusting the temperature of materials in the units, and the feeding and discharging unit is connected with the hydrogen storage unit, the hydrogen desorption unit and the separation unit through pipelines and used for adjusting and controlling conveying of a hydrogen storage carrier and a hydrogen-rich carrier; according to the design scheme, the liquid organic hydrogen storage carrier with high saturated vapor pressure is selected, the hydrogen storage system with the low-pressure hydrogenation characteristic and the hydrogen desorption system with microwave heating serving as the only heat source are coupled, the higher energy utilization rate can be achieved, the high selectivity of the hydrogen desorption reaction process can be achieved, the separation and purification process is simplified, and the hydrogen desorption efficiency is improved. And high-purity hydrogen can be released at lower cost.

This invention relates to the field of hydrogen energy storage technology, specifically disclosing a layered transition metal boride-modified lithium-magnesium-boron-hydrogen composite hydrogen storage material and its preparation method. This material uses 2LiH+MgB2 as a matrix and adds layered Mo... 4 / 3 B2 MBene was prepared as a modifier; Mo was used as a modifier. 4 / 3 B2 MBene by (Mo 2 / 3 Y 1 / 3 The 2AlB2 MAB phase precursor was prepared by selectively etching with HF to remove Al and Y atoms, followed by intercalation, layering, and freeze-drying. This invention utilizes mechanical ball milling to process Mo... 4 / 3 B2 MBene introduces the Li-Mg-B-H (LMBH) composite system, utilizing Mo 4 / 3 The unique layered structure of B2 MBene, combined with its inherent catalytic activity, significantly reduces the hydrogen desorption temperature of the LMBH system and improves its hydrogen desorption kinetics and cycle stability. This material can release 8.1 wt% H2 within 60 minutes at 420℃, and maintains a capacity retention of 68.7% after three cycles. Its performance surpasses that of bulk MoB-doped and undoped LMBH systems, providing a new approach for performance regulation of lightweight hydrogen storage materials and demonstrating promising practical application prospects.

The invention discloses a NaAlH4 composite hydrogen storage system doped with a titanium carbide catalyst loaded on an inner cavity of a carbon nano tube and a preparation method and application, and belongs to the field of solid hydrogen storage materials. Through optimal design of the structure and components of a titanium-based catalyst, generation of inert by-products (such as sodium halide) is effectively avoided; the hydrogen storage capacity of the catalytic composite system is obviously improved. The TiC-coated CNT catalyst adopted by the invention obviously reduces the hydrogen desorption temperature of NaAlH4, so that the composite system can realize hydrogen release at 80 DEG C, the hydrogen release amount exceeds 4wt.% before 200 DEG C, and the low-temperature dehydrogenation performance is excellent.

This invention relates to a covalent organic framework material for electrocatalytic hydrogen evolution from water, its preparation method, and its application. It aims to solve the technical problems of complex preparation and low hydrogen evolution efficiency of existing noble metal-doped covalent organic framework composite materials. The basic structural unit of the covalent organic framework material of this invention is as follows: it is obtained by the condensation reaction of 2-phenyl-1H-phenanthro[9,10-d]imidazolium-5,10-diamine and 2,4,6-tricarboxymethylpyrogallol. When prepared as an electrode for electrocatalytic hydrogen evolution from water, it achieves a hydrogen evolution efficiency of 0.5 mol·L⁻¹. ‑1 In an H2SO4 solution, at 10 mA·cm –2 With an overpotential as low as 167–197 mV, it can be used in the field of hydrogen production by water electrolysis.