180 results about "Hydrogen adsorption" patented technology

The invention provides a flexible palladium film hydrogen sensor and a preparation method thereof, the flexible palladium film hydrogen sensor is sequentially provided with a flexible substrate, a hydrogen sensitive sensing layer and a contact connection layer from bottom to top, and the contact connection layer is connected with a resistance measurement unit; and the hydrogen-sensitive sensing layer is a palladium or palladium alloy film with a conical micro-nano structure. The palladium or palladium alloy thin film with the conical micro-nano structure provides a hydrogen sensor conical surface micro-nano structure with a high specific surface area for the flexible palladium thin film hydrogen sensor, and the process that hydrogen is adsorbed, dissolved and diffused into the palladium or palladium alloy thin film is accelerated, so that the response speed of the sensor is increased; according to the hydrogen sensor, the flexible substrate is adopted, so that the hydrogen sensor can be conveniently arranged in various narrow spaces, and the applicability of the hydrogen sensor in various scenes is improved.

The present application relates to the technical field of catalysts and relates to a non-noble metal cathode hydrogen evolution catalyst for PEM water electrolysis and a use thereof. The present application provides a method for preparing a cathode hydrogen evolution catalyst. A nickel-molybdenum heteropoly acid having a specific structure is generated in situ on the surface of a porous carbon material carrier, and is used as a hydrogen evolution catalyst active component precursor, and an in-situ generated nickel-containing molybdenum sulfide active component is subjected to sulfidation treatment to prepare a non-noble-metal-supported cathode hydrogen evolution catalyst, wherein the in-situ generated nickel-containing molybdenum sulfide active component has a hydrogen adsorption free energy similar to that of Pt and catalytic hydrogen evolution activity, the dispersity is good, and the number of active sites is large, thereby reducing the costs of the catalyst; in addition, during the sulfidation treatment of the nickel-molybdenum heteropoly acid, nitrogen or phosphorus atoms in the carrier can be doped into the lattice of molybdenum disulfide, thereby reducing the hydrogen evolution Gibbs free energy of sulfur atoms on an MoS2 crystal basal surface, and more active sites are formed on a sulfur edge and a molybdenum edge, facilitating a hydrogen evolution reaction.

The invention provides a metal film hydrogen sensor and a preparation method thereof. The sensor comprises a substrate structure, a measuring electrode and a hydrogen sensitive laminated structure which are sequentially arranged from bottom to top, the hydrogen sensitive laminated structure can be combined with hydrogen to change the resistance value of the hydrogen sensitive laminated structure, the hydrogen sensitive laminated structure at least comprises a hydrogen storage layer and a hydrogen adsorption diffusion layer, the hydrogen adsorption diffusion layer is arranged above the hydrogen storage layer, and the hydrogen adsorption diffusion layer is used for adsorbing the hydrogen and enabling the hydrogen to be diffused in the hydrogen adsorption diffusion layer; the measuring electrode is electrically connected with the hydrogen sensitive laminated structure. Compared with a traditional palladium alloy film, the hydrogen storage layer can remarkably improve the hydrogen storage capacity of the sensor, so that the resistance type hydrogen sensor has a wider dynamic response range, through structural design, three functions of the sensing unit are achieved through the two metal film layers respectively, and the application range of the resistance type hydrogen sensor is widened. Therefore, each layer of metal film is optimized, and the overall performance of the hydrogen sensor is improved.

Mixed metal metal-organic frameworks (MM-MOFs) of copper-1,3,5-benzenetricarboxylate (BTC), M-Cu-BTC, wherein M is Zn(II), Ni(II), Co(II), and / or Fe(II) may be made using post-synthetic exchange (PSE) with metal ions. Such MM-MOFs may be used in H2 storage, especially Ni(II) and Co(II) MM-MOFs. Selected metal exchanged materials can provide gravimetric H2 uptake around 1.63 wt. % for Zn—Cu-BTC, around 1.61 wt. % for Ni—Cu-BTC, around 1.63 wt. % for Fe—Cu-BTC, and around 1.12 wt. % for Co—Cu-BTC.

The invention belongs to the technical field of hydrogen adsorption, leakage and sequestration simulation experiments, and particularly relates to a system and a method for detecting the hydrogen adsorption, leakage and sequestration capacities of soil. The system comprises a simulation bin system, a hydrogen inlet system, a helium inlet system, a water inlet system and a gas outlet system, the simulation bin system is divided into an air simulation bin, a sample bin and a gas source bin by a pressurizing device and a supporting device, and a water vapor heating disc is arranged in the gas source bin. The hydrogen inlet system is in valve control connection with the gas source bin, the helium inlet system is in valve control connection with the air simulation bin and the gas source bin, the water inlet system is in valve control connection with the steam heating disc, and the gas outlet system is in valve control connection with the air simulation bin and the gas source bin. The method comprises eight steps, and the processes of adsorption, leakage and sealing storage of hydrogen in soil when the hydrogen leaks upwards under different air temperatures and air pressures in the nature are simulated. Therefore, the system and the method can provide theoretical and technical guidance for earth surface exploration of natural hydrogen.

The utility model discloses a regeneration device of a hydrogen adsorption tower, and relates to the technical field of hydrogen adsorption. Comprising a hydrogen adsorption tower A and a hydrogen adsorption tower B. A hydrogen feeding port of the hydrogen adsorption tower A and a hydrogen feeding port of the hydrogen adsorption tower B are connected with a first hydrogen feeding pipeline and a second hydrogen feeding pipeline respectively, and the first hydrogen feeding pipeline and the second hydrogen feeding pipeline are provided with a first feeding valve and a second feeding valve respectively. When the hydrogen adsorption tower is regenerated, the hydrogen adsorption tower is decompressed, organic phases in the hydrogen adsorption tower are desorbed by water vapor, the desorbed regenerated materials are recycled by the material recycling unit, and then the hydrogen adsorption tower is purged by hot nitrogen and cold nitrogen in sequence. And finally, hydrogen balance is performed on the hydrogen adsorption tower by using qualified hydrogen, so that regeneration of the hydrogen adsorption tower can be completed, and stable operation of hydrogen adsorption is ensured.

The invention belongs to the technical field of material preparation, and discloses a preparation method of an alloy film loaded noble metal electrode for alkaline hydrogen evolution, and the preparation method comprises the following steps: firstly growing a nickel-iron alloy film on foamed nickel through constant-current deposition, then dipping in a ruthenium trichloride aqueous solution, reducing trivalent ruthenium ions into metal ruthenium under the action of the foamed nickel, and finally obtaining the metal electrode loaded with noble metal. The sample is anchored on the alloy film in the form of ruthenium nano-particle clusters, and the sample has ultralow ruthenium loading capacity. The obtained alloy film is smooth and uniform, uniform distribution of active sites is facilitated, electron transfer is accelerated, meanwhile, the ruthenium nanocluster with the proper size is loaded by controlling the dipping condition, the hydrogen evolution reaction is promoted, the hydrogen adsorption process is optimized through the synergistic effect between the ruthenium nanocluster and the nickel-iron alloy, and the hydrogen adsorption efficiency is improved. And the hydrogen evolution reaction kinetics of the material is improved. The obtained self-supporting catalyst has excellent performance which is superior to that of a Pt / C catalyst, still keeps excellent stability under industrial-grade large current density, and has a wide application prospect.

The present invention relates to the technical field of adsorbents, and specifically discloses a pressure swing adsorption hydrogen purification adsorbent for synthesizing morpholine and a preparation method thereof. The specific preparation method comprises the following steps: Step a: grinding the binder into powder for standby; Step b: mixing 13X molecular sieve, binder, structure stabilizer and calcium compound in a certain proportion, and forming a spherical compound A after mixing; Step c: pre-drying the spherical compound A, followed by roasting, washing, drying and activation to obtain the adsorbent. The pressure swing adsorption hydrogen purification adsorbent for synthesizing morpholine provided by the present invention has good adsorption effect, can tolerate high concentration of CO2, and a structure stabilizer is added to the adsorbent, so that the prepared adsorbent has a stable structure and can tolerate the influence of gas flow scouring, particle and bed vibration on the adsorbent. Finally, the preparation method of the adsorbent of the present invention is simple and easy for industrial production.

The disclosure provides a method for improving hydrogen adsorption performance of a covalent organic framework material, including the following steps: providing a covalent organic framework material including an imine bond; and placing the covalent organic framework material in hydrochloric acid vapor for protonation. The disclosure further provides a protonated covalent organic framework material, and use thereof as a hydrogen storage medium.

The invention relates to the technical field of hydrogen fluoride adsorption, and particularly discloses a hydrogen fluoride adsorption tower which comprises a tower body, a gas inlet pipeline arranged on the lower section of the tower body, a gas outlet pipeline arranged on the upper section of the tower body, a plurality of layers of adsorption beds arranged in the tower body in the vertical direction, and adsorbents arranged on the adsorption beds. The material changing mechanism comprises a waste material pipe rotationally arranged in the tower body, a driving part I for driving the waste material pipe to rotate, a plurality of inverted conical funnels respectively arranged below the plurality of layers of adsorption beds and a plurality of trapping boxes arranged on the waste material pipe, and the waste material pipe penetrates through all the adsorption beds; a plurality of spiral scrapers for driving the adsorbent to radially flow are arranged on the waste pipe, the upper end of the inverted-cone-shaped funnel exceeds the outer edge of the adsorption bed, an annular air jet hole is formed in an outlet in the bottom of the inverted-cone-shaped funnel, and the trapping boxes surround the waste pipe in an annular array; the device has the beneficial effects that saturated aluminum oxide is separated in time, so that the adsorption effect of the aluminum oxide is improved.

The invention belongs to the technical field of anion exchange membrane fuel cells, and discloses a high-stability ruthenium-based hydroxide electrocatalyst used as an anode of an anion exchange membrane fuel cell and a preparation method of the high-stability ruthenium-based hydroxide electrocatalyst. The catalyst is prepared by taking ruthenium as a unique active component, fullerene (C60) as a carbon substrate and polydopamine (PDA) as an additive through argon heat treatment. The preparation method disclosed by the invention is simple and easy to implement, and through the design scheme that C60 with high electron affinity is used as a carrier, the electronic structure of a ruthenium active site is effectively adjusted, and excessive adsorption of a ruthenium-based catalyst to hydroxyl species in a hydrogen oxidation reaction (HOR) process is weakened, so that the ruthenium reaction active site is greatly reserved for hydrogen adsorption, and the hydrogen adsorption efficiency is improved. Therefore, the stability of ruthenium-based electro-catalysis in hydrogen oxidation reaction can be greatly improved.

The utility model provides a BOG (Boil Off Gas) dehydrogenation system, which belongs to the technical field of gas separation and comprises a dehydrogenation device, the dehydrogenation device is connected with a mixed gas source unit and a circulating heat exchange medium unit, and one end, far away from the mixed gas source unit, of the dehydrogenation device is connected with a dehydrogenation mixed gas unit; the dehydrogenation device comprises a heat exchange box body, a plurality of hydrogen storage alloy tank bodies are arranged in the heat exchange box body, each hydrogen storage alloy tank body is connected with a mixed gas inlet and a mixed gas outlet, the mixed gas inlet is connected with a mixed gas source unit, and the mixed gas outlet is connected with a dehydrogenation mixed gas unit; the BOG gas dehydrogenation system further comprises a control system, and the control system is connected with the dehydrogenation device. According to the BOG dehydrogenation system disclosed by the utility model, the purpose of hydrogen separation is achieved by adopting reversible reaction of hydrogen storage alloy and hydrogen adsorption, the process is carried out under the conditions of normal temperature and low pressure, and compared with the existing methods of low-temperature separation, high-pressure adsorption and the like, the energy consumption is greatly reduced, and energy conservation and emission reduction are facilitated.

The application provides a method, an apparatus and a device for evaluating a dynamic diffusion of natural hydrogen in rock pores. The method includes: performing, at a target pressure and a target temperature, a simulation calculation of a natural hydrogen adsorption based on a pre-constructed pore model of a rock to be evaluated, and determining an average number of hydrogen molecules adsorbed in the rock pores when the natural hydrogen is saturated at the target pressure and the target temperature; determining a natural hydrogen content, based on lithologic parameters, the average number of hydrogen molecules, the target pressure and the target temperature; adding one or more preset gases to the pre-constructed pore model, determining a loss content of the natural hydrogen, and determining a diffusion coefficient of the natural hydrogen; determining a diffusion evaluation parameter, based on the natural hydrogen content, the loss content and the diffusion coefficient.

The invention discloses a liquid hydrogen filling device and method, and belongs to the technical field of liquid hydrogen. The device comprises a liquid hydrogen supply tank, a liquid hydrogen receiving tank, a filling pipeline and a pressurizing pipeline, the bottom of the liquid hydrogen supply tank is communicated with the bottom of the liquid hydrogen receiving tank through a filling pipeline; evaporation ends of the low-temperature heat pipes are positioned in the hydrogen adsorption module, and condensation ends of the low-temperature heat pipes are positioned in the metal cavity and are provided with metal fins; the head end of the pressurizing pipeline is divided into two branches, the first branch is connected with the filling pipeline, the first pressurizing valve, the intermittent heater and the metal cavity, the second branch is connected with the top of the liquid hydrogen receiving tank and the second pressurizing valve, and the two branches are combined and then connected with the liquid hydrogen supply tank. The pressure in the receiving tank in the filling process is reduced through the hydrogen adsorption module, the filling success rate is increased, meanwhile, liquid hydrogen is used for conducting non-contact cooling on the hydrogen adsorption module, vaporized hydrogen obtained after cooling serves as pressurized gas of the supply tank, the pressure in the hydrogen adsorption module is kept stable, and a certain supercooling degree is provided for operation of the liquid hydrogen pump.

The present invention discloses a hydrogen storage material based on porous carbon loaded with fluorine-based functional groups, its preparation method and application, belonging to the fields of inorganic nanomaterial chemistry and energy technology. Fluorine atoms are introduced onto the surface of the porous carbon through C-M-F or C-N-F bonding methods to form hydrogen absorption sites. At the same time, the present invention uses a simple solution impregnation loading method to modify the surface of the porous carbon precursor by using different kinds of hexafluorosilicates, effectively avoiding the influence of heteroatoms, and obtaining fluorine-containing functional groups on the surface of the porous carbon during high-temperature reactions, enabling the target structure and surface functional groups to form efficient adsorption sites with hydrogen. The obtained hydrogen storage material has excellent low-temperature hydrogen storage capacity and a relatively high hydrogen absorption capacity.

The invention discloses a molybdenum-nickel alloy-nickel oxide self-supporting catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: adding a nickel metal substrate into a mixed solution containing Mo salt and urea to carry out solvothermal reaction, dissolving out a nickel matrix to provide a Ni source and react with Mo salt, and growing nano petals consisting of molybdenum-nickel oxide nanosheets in situ on the nickel matrix. And placing the precursor in a reducing atmosphere, and carrying out a heat preservation reaction to obtain the molybdenum-nickel alloy-nickel oxide self-supporting composite hydrogen evolution catalyst. The self-supporting structure does not need to be added with a binder, so that the large-current cycling stability of the catalyst is improved, the dispersion degree of MoNi4 alloy particles on the surface of a NiO nanosheet matrix is greatly increased through an in-situ precipitation mode, the conductivity of the catalyst is improved, a high-surface-area and rich high-activity MoNi4-NiO composite interface is obtained, and the high-current cycling stability of the catalyst is improved. Meanwhile, the hydrogen adsorption energy of the MoNi4 alloy surface and the water dissociation activity of the NiO surface are optimized through the strong electron coupling effect of the heterogeneous interface, and the alkaline hydrogen evolution activity of the composite catalyst is remarkably improved.

The invention provides a hollow pipe fitting forming device and method. The hollow pipe fitting forming device comprises a heating mechanism, a bulging quenching mold and an air source mechanism. The heating mechanism comprises a roller hearth furnace provided with a conveying roller way, a furnace body is sequentially provided with a feeding isolation chamber, a heating chamber and a discharging isolation chamber in the length direction, all the chambers are isolated from one another and communicated with a protective atmosphere system, and the chambers are used for introducing dry air or inert gas into the furnace body and maintaining the dew point temperature below-15 DEG C; hydrogen adsorption on the surface of the hollow pipe blank is effectively inhibited, and the hydrogen embrittlement risk is reduced. After a pipe blank is heated at a high temperature, austenitizing of a material structure is achieved, then the pipe blank is rapidly transferred to a bulging quenching die, gas expansion deformation occurs in a die cavity under the action of set air pressure, the hollow pipe fitting is formed by attaching the die wall, meanwhile, the hollow pipe fitting attached to the die cavity is synchronously cooled through a cooling assembly in the die, and quenching treatment is achieved. The material structure is converted into martensite, and the mechanical property of a formed part is improved.

The invention provides a method and a device for testing hydrogen doping of a buried steel pipe under a cathode protection condition. The method and the device solve the technical problem that an internal hydrogen permeation-external hydrogen adsorption synergistic effect mechanism faced by a buried pipeline cannot be reflected in an existing test. The method comprises the following steps: establishing a dual test environment under a cathode protection condition, forming a control group and an experimental group of a corrosion test piece to be tested, deploying the control group in a single soil environment, and deploying the experimental group in internal and external hydrogen environments; the power-on potential and the power-off potential are continuously monitored in the dual test process; quantitative comparison of key parameters of the control group and the experimental group is formed according to the double test periods; and constructing a multiple regression model according to the key parameters in combination with potential correction data to quantify the correlation between the corrosion rate and the hydrogen embrittlement sensitivity. The double-environment coupling effect in the actual operation of the pipeline is synchronously simulated, and the diffusion path difference of hydrogen atoms in metal lattices and the influence of double-environment superposition on the corrosion rate are more truly reflected.

The invention is applicable to the technical field of solid hydrogen storage, and provides a preparation method and application of an MgH2-Pb-ZrO2-C nano-composite hydrogen storage material. Zr-Pb-MOF is synthesized through a UIO-66 template method, bimetal nanoparticles obtained after Zr-Pb-MOF pyrolysis are fully mixed with MgH2, MgH2-Pb-ZrO2-C is prepared, and the hydrogen adsorption and desorption amount of the MgH2-Pb-ZrO2-C can reach 6.98 wt%. According to the material, an MOFs derivative is used as a buffer material to prevent agglomeration in ball milling and dehydrogenation processes, and the catalytic effect of MOFs and the synergistic effect of nano-constraint are fully utilized to improve electron transfer in the hydrogen atom adsorption / desorption process. The specific surface area of the nano-composite hydrogen storage material can be increased by increasing the doping content of Pb (NO3) 2, and meanwhile, the hydrogen storage capacity of the material can be remarkably improved by combining pyrolysis treatment; the preparation method is simple and feasible and is suitable for large-scale production.

The invention relates to an electrode and a preparation method and application thereof, and belongs to the field of water electrolysis industry. The preparation method of the electrode comprises the following steps: providing an electroplating base material; nickel is plated on the surface of the electroplating base material to form a nickel plating layer, and a pre-plated base material is obtained; the pre-plated base material is added into a first electroplating solution to be electroplated to form an alloy plating layer, the electrode is obtained, and the first electroplating solution comprises a NiSO4 solution with the concentration being 0.5 mol / L to 1 mol / L, a Na2MoO4 solution with the concentration being 0.01 mol / L to 0.05 mol / L and a CuSO4 solution with the concentration being 0.1 mol / L to 0.5 mol / L. Compared with nickel or common nickel alloy, the prepared electrode has the advantages that the hydrogen adsorption performance is reduced, the overpotential is effectively reduced, and the water electrolysis performance is close to that of precious metal.

A hydrogen gas storage tank includes a body including a metallic bulk region and one or more protective layers adjacent to the bulk region. One or more of these protective layers comprise a number of graphyne molecules such that the one or more protective layers are configured to lower hydrogen adsorption into the bulk region when compared to a bulk region with protective layers free from graphyne.

The invention discloses preparation and application of a rare earth MOF (Metal Organic Framework)-based hindered Lewis acid-base pair for hydrogenation, and belongs to a preparation technology of a nano catalytic material. According to the preparation method, in the synthesis process of rare earth MOF, a proper amount of transition metal is introduced to serve as a doping agent, rare earth-transition bimetallic MOFs with adjustable defects and morphology are synthesized, and hindered Lewis acid-base pairs serving as active sites can be effectively used for DCPD hydrogenation. Through heteroatom doping and defect engineering technologies, RE-MOF lattice distortion is induced while a second metal active site is introduced, so that the catalytic performance of the material is improved. RE-X-BTC (wherein X represents a doped transition metal, and BTC represents trimesic acid) shows enhanced Lewis acid-base characteristics and hydrogen adsorption and desorption characteristics, and selective hydrogenation of a substrate is realized by precisely regulating and controlling reaction conditions. The implementation of the invention provides a new way for the application of the porous MOF in the field of hydrogenation catalysis.

A method and apparatus for regenerative hydrogen separation at high temperatures for production of pure hydrogen gas. Pure metals and metallic alloys are used at high temperatures to maximize the catalytic effect for hydrogen dissociation, hydrogen diffusion and hydrogen sorption capacity. Metallic materials are used that can selectively sorb hydrogen at high temperatures. These materials are integrated into equipment designs and process configurations to process a stream of hot mixed process gases to produce a stream of pure hydrogen product at the desired system temperature. The invention can be used to enhance the performance of existing plants such as steam methane reforming applications by increasing the conversion to hydrogen, eliminating or reducing the number of shift converters, providing pure hydrogen product, and enhancing the overall energy efficiency. In some embodiments, the hydrogen sorption system is built inside a hydrogen production reactor, enhancing the chemical equilibrium inside the reactor, to achieve higher conversion and hydrogen yields.

The utility model discloses a pressure equalizing adjusting device of a hydrogen production adsorption tower, and relates to the technical field of hydrogen production adsorption towers. The pressure equalizing adjusting device of the hydrogen production adsorption tower comprises a hollow shell with an opening in the rear end, a controller is fixedly connected to the lower end in the shell, a display screen is fixedly connected to the interior of the upper end of the front surface of the shell, and two three-way pipelines are arranged at the upper end in the shell; the left end and the right end of the three-way pipeline are fixedly connected with the outer wall of the shell, an electromagnetic valve is fixedly connected to the horizontal section of the three-way pipeline and located on the right side of the turning position, and an electromagnetic proportional valve is fixedly connected to the right end of the turning section of the three-way pipeline. And the controller is electrically connected with the display screen, the electromagnetic valve, the electromagnetic proportional valve and the pressure sensor in the adsorption tower. According to the pressure-equalizing adjusting device for the hydrogen production adsorption tower, plc control equipment and a pipeline control system are integrated together, and the internal pressure can be adjusted and controlled only through pipeline connection.

The utility model discloses a device for automatically adjusting the gas treatment amount of an adsorption tower on line, relates to the technical field of polycrystalline silicon production, and mainly aims to monitor the content of Cl <-> in hydrogen treated by the adsorption tower on line and realize automatic adjustment of an outlet adjusting valve of the hydrogen adsorption tower. According to the main technical scheme, the device for automatically adjusting the gas treatment amount of the adsorption tower on line comprises a reaction chamber, a gas inlet pipe and an ion chromatograph, the upper end of one side of the reaction chamber is connected to a discharge pipe, a filler layer is arranged in the reaction chamber, and the liquid level in the reaction chamber is located above the filler layer; one end of the gas inlet pipe is connected to the adsorption tower outlet pipe, the other end of the gas inlet pipe penetrates through the top wall of the other side of the reaction chamber and is connected to the bubbling pipe, the bubbling pipe is located below the filler layer, and a plurality of through holes are uniformly distributed in the pipe wall of the bubbling pipe; the detection end of the ion chromatograph extends into the liquid above the filler layer, and the ion chromatograph and the adsorption tower outlet regulating valve are in interlocking control.

The invention provides an efficient hydrogen evolution method of a monatomic catalyst, and relates to the technical field of monatomic catalytic materials. The monatomic catalyst is used for efficiently separating out hydrogen, the monatomic catalyst is ZnIn2S4, the Gibbs free energy (delta GH *) adsorbed by the hydrogen is commonly used for representing the catalytic activity of a hydrogen separation reaction (HER), the ZnIn2S4 has a typical layered structure and is hexagonal in atomic arrangement, the lattice parameter of the ZnIn2S4 is # imgabs0 # gamma = 120 degrees, the ZnIn2S4 can be regarded as being composed of a ZnS layer and an In2S3 layer, and the ZnS layer and the In2S3 layer are arranged in a hexagonal manner. The layers are connected through a Zn-S bond, the bond length of the Zn-S bond is # imgabs 1 #, the calculated lattice parameter of ZnIn2S4-Sv is # imgabs 2 # smaller than that of ZnIn2S4, and the catalytic activity of the hydrogen evolution reaction (HER) is Gibbs free energy (delta GH *) of hydrogen adsorption. Through the experiment, after the defects are introduced, the S-vacancy and the In-vacancy can enhance the charge transfer between the ZnIn2S4 layers.

The invention provides a hydrogen adsorption and storage composite material for a high-hygrothermal environment of a coal mine as well as a preparation method and application of the hydrogen adsorption and storage composite material, and relates to a high-efficiency hydrogen adsorption and storage composite material. The method comprises the following steps: activating activated carbon to obtain pretreated activated carbon; the method comprises the following steps: soaking zeolite in a NaCl solution, and drying to obtain pretreated zeolite; mixing ZIF-8, the pretreated activated carbon and zeolite, and adding the mixture into a ball mill for ball milling to obtain composite powder; mixing and stirring the obtained composite powder and a binder, curing into a sphere by adopting a spray drying method, and drying and heating to form a porous structure, thereby obtaining the hydrogen adsorption and storage composite material for the high-humidity-heat environment of the coal mine. According to the MOFs composite material disclosed by the invention, efficient separation and storage of hydrogen in a complex gas source are realized by utilizing a hierarchical pore structure and moisture-resistant stability of the material, relatively high hydrogen adsorption capacity and relatively high adsorption rate can be kept in a high-humidity-heat environment, and the MOFs composite material is suitable for high-risk environments such as a coal mine and the like.

The invention discloses a preparation method and application of a selective hydrogen adsorption type magnesium base material in a non-pure hydrogen atmosphere, and the preparation method comprises the following steps: carrying out thinning treatment on Ti3C2 MXene powder to obtain few-layer Ti3C2; the method comprises the following steps: weighing a MgH2 powder sample, pretreating, and then carrying out atomic layer deposition to obtain a sample subjected to atomic layer deposition coating treatment; carrying out ball milling treatment on the sample subjected to atomic layer deposition coating treatment and few-layer Ti3C2, so as to obtain MgH2-ZrTi; mgH2-ZrTi powder is weighed and pretreated, amorphous Al2O3 of 5 nm to 20 nm is deposited after pretreatment, and the selective hydrogen adsorption type magnesium-based material is obtained. The method disclosed by the invention is simple, efficient and easy to operate, is beneficial to large-scale production and application, and also fills the blank of air stability and selective hydrogen absorption of the hydrogen storage material.

An electrochemical cell active hydrogen capture and release system including a first zone having a target predetermined concentration of hydrogen c1 and housing: an electrical component, an adsorbing electrode including a hydrogen adsorbing material, a counter electrode separated from the adsorbing electrode, and an electric circuit connecting the adsorbing and counter electrodes to apply electrical bias configured to facilitate capture and release of hydrogen gas from the adsorbing electrode; and a second zone having a target predetermined concentration of hydrogen c2, c2 being greater than c1.

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.