35results about How to "Improve hydrogen production performance" patented technology

The invention relates to a method for enhancing hydrolytic acidification performance of a mixed raw material by biogas residue biochar prepared from anaerobic fermentation discharged materials, and belongs to the field of anaerobic digestion of organic solid wastes. According to the method, the kitchen waste and the corn straw are used as the mixed raw material, the biogas residue biochar is prepared from the wet anaerobic digestion discharged material added with the shell powder and the nano ferroferric oxide, and the biogas residue biochar is applied to the acid production stage of the mixed raw material to improve the hydrolytic acidification performance, so that the hydrogen production performance, the system stability and the biogas production performance of the mixed raw material are improved. Compared with a control group, the accumulated hydrogen yield of the mixed raw material is increased by 126.8%-133.0%, and the maximum hydrogen production peak is increased by 48.7%-67.9%. The maximum daily volatile fatty acid yield of an anaerobic system is improved by 33.7%-51.4% compared with that of a control group, and the stability of the system is also obviously enhanced. In the biogas production stage, the biogas yield is improved by 42.0%-51.8% compared with that of a control group. The method can significantly improve the hydrolytic acidification and biogas production performance of the mixed raw material.

A method for improving the release efficiency of bubbles on the surface of an electrode in high-current water electrolysis hydrogen production belongs to the technical field of hydrogen energy production, and the specific scheme comprises the following steps: step 1, applying pulse voltage to a proton exchange membrane electrolytic cell for water electrolysis hydrogen production, the applied pulse current being 0.5-2A, and the applied pulse voltage being 1.4-1.6 V; and 2, conveying the electrolyte deionized water to an anode chamber of the proton exchange membrane electrolytic cell so as to initiate an oxidation reaction to prepare hydrogen. According to the pulse dynamic electrolysis technology, the PEMWE high-current hydrogen production performance can be improved by adjusting the power supply mode of the power source. Besides, the voltage during the pulse interval period is zero, and the total energy consumption actually only comprises the electric energy consumption within the pulse voltage applying time, so that the pulse dynamic electrolysis technology has more advantages from the energy consumption perspective. The pulse dynamic electrolysis technology is expected to promote bubble release and relieve the polarization phenomenon in PEMWE high-current hydrogen production, and the hydrogen production efficiency and the energy utilization rate of the system are improved.

The embodiment of the invention provides a carbon dioxide trapping and coupling modularized electrolytic hydrogen production system which comprises an absorption device, and a carbon dioxide absorption liquid solution is arranged in the absorption device and used for absorbing carbon dioxide; the electrolytic hydrogen production device comprises a plurality of electrolytic units, each electrolytic unit comprises an anode chamber and a cathode chamber which are isolated from each other, an anode electrode is arranged in each anode chamber, a cathode electrode is arranged in each cathode chamber, the polarities of the two adjacent electrodes of the two adjacent electrolytic units are opposite, the anode chambers are communicated with the absorption liquid outlet of the absorption device, and the cathode chambers are communicated with the absorption liquid outlet of the absorption device. The cathode chamber is communicated with an absorption liquid inlet of the absorption device; the first gas-liquid separation device is communicated with an anode liquid outlet of the anode chamber, and the first gas-liquid separation device is communicated with a cathode liquid inlet of the cathode chamber; and the second gas-liquid separation device is communicated with a cathode liquid outlet of the cathode chamber, and the second gas-liquid separation device is communicated with an absorption liquid inlet of the absorption device.

The invention discloses a preparation method of a three-dimensional flower-cluster-shaped CdS QDs (at) ZnS / ZnO composite photocatalyst, belongs to the field of preparation of photocatalytic materials, and aims to solve the problem of relatively low photocatalytic efficiency. The preparation method comprises the following steps: 1, preparing zinc oxide: dissolving Zn (CH3COO) 2.2 H2O in deionized water, stirring until Zn (CH3COO) 2.2 H2O is completely dissolved, adding NaOH, stirring to form an emulsion, transferring the mixed emulsion into a polytetrafluoroethylene reaction kettle, and treating at 160 DEG C for 10 hours; 2, preparation of cadmium sulfide quantum dots (CdS QDs): dropwise adding thioacetamide (TAA) into a Cd (NO3) 2.4 H2O aqueous solution, continuously stirring and dropwise adding a NaOH solution, adjusting the pH value of the solution to 10.5, then adding a Na2S solution, stirring at 65 DEG C for 1 h, cooling to room temperature, and aging for 24 h; and 3, dissolving Zn (CH3COO) 2.2 H2O and TAA in deionized water, adding ZnO powder, adding CdS QDs, and carrying out rapid stirring. Putting into a microwave reaction instrument, reacting at 160 DEG C for 45 minutes, washing and drying. The three-dimensional flower-cluster-shaped CdS QDs (at) ZnS / ZnO composite photocatalyst is prepared through a microwave-assisted hydrothermal method, and the photocatalytic oxidation performance is effectively improved.

The invention discloses an MOF-derived copper-based catalyst and a preparation method and application thereof.According to the MOF-derived copper-based catalyst, a Cu-MOF metal organic framework material synthesized through hydrothermal reactions in different modes serves as a sacrifice template agent, a series of copper-based catalytic materials with rich micro-mesoporous structures are prepared through high-temperature calcination, copper particles of the obtained materials are highly dispersed, the specific surface area is high, and the molecular weight is high; the size of the metal Cu can reach the nanoscale, the metal content can reach 45%, when the catalyst is used for catalyzing the methanol liquid phase reforming hydrogen production reaction, no CO or CH4 byproduct gas is generated in the whole hydrogen production process, and the stability and the service life of the catalyst are superior to those of a common copper-based metal catalyst; the invention provides an efficient and low-cost non-noble metal catalyst for medium-low temperature methanol liquid phase reforming hydrogen production, and has certain significance for the development of subsequent low temperature methanol liquid phase reforming hydrogen production catalysts.

The invention discloses a spinel oxygen carrier with the capability of deeply releasing lattice oxygen as well as a preparation method and application thereof, and belongs to the related technical field of hydrogen energy preparation. Elements such as Cu, Mn, Ni, Ca, Sr and the like are doped into a metal iron-based oxygen carrier AFe2O4 with a spinel type structure according to an equal molar ratio, a dilution effect is shown on A-site atoms of the spinel type oxygen carrier AFe2O4 by virtue of multiple metal elements, and a multi-metal effect for promoting lattice oxygen release is combined. In addition, the spinel type oxygen carrier (AFe2O4) has excellent adsorption capacity and cycling stability, and the novel oxygen carrier is applied to chemical looping hydrogen production (CLR) to realize recycling of waste plastics and efficient preparation of high-purity hydrogen. Therefore, the problems of insufficient activity, serious surface carbon deposition, poor cycling stability and the like of a pure Fe2O3 oxygen carrier in chemical looping hydrogen production (CLR) are solved.

The invention relates to an interface engineering method of Zn0. 5Cd0. 5S loaded on a high-entropy sulfide cocatalyst and an application of the Zn0. 5Cd0. 5S. According to the method, firstly, a high-entropy sulfide FeCoNiCrAlSx (HES) is synthesized by adopting a solvothermal method, then the high-entropy sulfide HES is introduced into a Zn0. 5Cd0. 5S system through a one-step coprecipitation method, a compact interface is formed between FeCoNiCrAlSx and Zn0. 5Cd0. 5S, and meanwhile, FeCoNiCrAlSx provides abundant active sites. The obtained composite material can promote effective separation and transfer of photo-induced electron holes, the photocatalytic hydrogen production activity of Zn0. 5Cd0. 5S is remarkably improved, and new possibility is provided for designing an efficient and stable non-noble metal photocatalytic system.

The invention belongs to the field of preparation of photoelectric catalytic materials, and discloses a zirconium-based MOFs composite material loaded with carbon nitride quantum dots as well as a preparation method and application of the zirconium-based MOFs composite material. The composite material is prepared by adopting a solid phase method, and the method is simple, low in cost, easy to amplify, free of toxic solvents and environmentally friendly. The zirconium-based MOFs composite material loaded with the carbon nitride quantum dots prepared by the invention retains the advantages of large specific surface area and rich pore structure of the MOFs material, and shows excellent hydrogen production performance when the zirconium-based MOFs composite material loaded with the carbon nitride quantum dots is used as a photoelectrode material for hydrogen production by photoelectrocatalytic decomposition of water.

The invention discloses an in-situ generated magnesium borohydride composite hydrogen storage material as well as a preparation method and application thereof, and belongs to the technical field of solid hydrogen storage. According to the preparation method, an intercalation-in-situ growth method is adopted to prepare the in-situ generated magnesium borohydride composite hydrogen storage material, and the preparation method comprises the following steps: S1, adding a certain amount of a carrier into a (CH3) 2S. BH3 toluene solution in a glove box filled with Ar, and uniformly stirring the mixture to obtain a turbid liquid A; s2, weighing the turbid liquid A and a Mg (C4H9) 2 heptane solution with a certain concentration, stirring until complete reaction to obtain a precipitate B, washing with an anhydrous toluene solution, and collecting the precipitate B; and S3, transferring the precipitate B to a vacuum drying oven, and carrying out thermal decomposition under a vacuum condition to obtain the in-situ generated magnesium borohydride composite hydrogen storage material. The hydrogen storage material provided by the invention not only shows excellent hydrogen production capacity in hydrolysis hydrogen production reaction, but also has controllable reaction rate.

This invention discloses a three-armed cadmium sulfide nanorod photocatalyst, comprising: three-armed cadmium sulfide nanorods, molybdenum disulfide, and iridium disulfide; wherein each of the three tips of the three-armed cadmium sulfide nanorods is loaded with molybdenum disulfide and iridium disulfide. This photocatalyst is obtained by mixing the three-armed cadmium sulfide nanorods with iridium chloride and sodium molybdate in a solvent, followed by a hydrothermal reaction. This invention achieves efficient separation of photogenerated electron-hole pairs and improves photocatalytic performance by successfully loading molybdenum disulfide and iridium disulfide nanoflower-like co-catalysts onto the tips of the three-armed cadmium sulfide nanorods.

This invention relates to the field of nanoscale full-spectrum photocatalytic materials, and particularly to a method for preparing a molybdenum selenide / oxygen-deficient bismuth oxybromine@gold three-phase Z-type heterojunction photocatalyst. This method solves the problems of low photogenerated electron-hole separation efficiency, narrow full-spectrum response range, and poor stability in existing bismuth-based photocatalysts. The preparation method involves first preparing oxygen-deficient BiOBr nanospheres via a solvothermal method, then directly reacting tetrachloroauric acid with oleylamine in toluene to prepare small-particle-size monodisperse Au nanoparticles, which are then combined with oxygen-deficient BiOBr to prepare a BiOBr@Au nanosphere core-shell structure. Finally, a MoSe2 / oxygen-deficient BiOBr@Au three-phase composite material is prepared via a hydrothermal reaction. The catalyst of this invention exhibits absorption capacity under the full spectrum of light, and simultaneously achieves a synergistic enhancement of carrier separation efficiency and strong redox capability, demonstrating excellent photocatalytic activity and the ability to efficiently degrade pollutants and produce hydrogen.

The present invention discloses a photocatalytic nanomaterial-microorganism hybrid and its preparation method and application. The preparation method comprises the following steps: adding graphene oxide to a mixed solution containing a water-soluble divalent cadmium salt, thiourea and polyvinyl pyrrolidone, performing a hydrothermal reaction, then washing and vacuum drying to obtain a CdX / RGO material; culturing Shewanella under aerobic conditions to obtain a bacterial solution; dispersing the CdS / RGO material in an anaerobic buffer to obtain a buffer A; centrifuging the Shewanella bacterial solution and discarding the supernatant, then dispersing the precipitate cells obtained by centrifugation into a buffer A, mixing and stirring to obtain a CdS / RGO / MR-1 material. The present invention prepares a novel hybrid of photocatalytic-biological synergistic and efficient hydrogen production, which can realize the efficient transfer of photogenerated electrons from the extracellular to the intracellular hydrogenase to promote the efficiency of light energy utilization and hydrogen production.

The invention provides a platinum-based catalyst as well as a preparation method and application thereof, and relates to the technical field of preparation of nano composite materials. Polyphenols and s-triazinyl compounds are used as raw materials, a nanorod-shaped carrier is synthesized through a supramolecular self-assembly method, then platinum nanoparticles are deposited on the surface of the carrier in situ by using reducing acid or reducing alcohol, and the platinum-based catalyst is prepared. The preparation method provided by the invention is green and environment-friendly, the raw materials are simple, convenient and easy to obtain, the price is low, meanwhile, the reaction condition is mild, the energy consumption is low, a surfactant does not need to be used, and the prepared catalyst has extremely high activity and stability for catalyzing decomposition of reducing acid or reducing alcohol to produce hydrogen at normal temperature and normal pressure, and has better application prospects and economic benefits.

The invention discloses a preparation method of a polymer pole frame electrolytic cell for hydrogen production by alkaline electrolysis of water. Comprising the following steps: processing a pole frame, a sealing gasket, a pole plate sealing gasket and a concave-convex pole plate; a diaphragm, an electrode, a sealing gasket, a concave-convex polar plate, a polar plate sealing gasket and a polar frame are sequentially placed as a small chamber; after the required number of the small chambers is reached, the two end plates are mounted and locked through bolts after the electrifying rings are mounted; and the bolts are fastened for multiple times to complete the assembly of the electrolytic cell. According to the invention, aiming at the relation setting of the polar plate salient point, the thickness of the sealing gasket and the compression amount of the sealing gasket and the setting of the polar plate edge fixing clamping point, the distance between the polar plate salient point and the electrode in the polymer electrolytic bath is minimized, the transmission efficiency of electric energy in the electrolytic bath is improved, the energy consumption is reduced, and the hydrogen production effect is effectively improved.

The invention discloses a photocatalytic conical optical fiber and a preparation method and application thereof.The photocatalytic conical optical fiber comprises an input part and a conical part with the optical fiber diameter gradually reduced, the conical part is provided with a photocatalyst coating and serves as a photocatalytic reaction end, light enters the optical fiber from the input part and is spread in the optical fiber, and when the light is reflected to the surface of the optical fiber at the conical part, the light is reflected to the surface of the optical fiber. The preparation method comprises the following steps: exciting a photocatalyst near a reflection point to generate a photocatalytic reaction, and in the preparation process, performing tapering treatment of thermal stretching on an optical fiber to obtain a tapered optical fiber with an input part and a tapered part; and preparing a photocatalyst suspension, and loading a photocatalyst coating on the conical part of the conical optical fiber through a physical impregnation method to obtain the photocatalytic conical optical fiber. The conical optical fiber structure can effectively increase the light reflection frequency of the conical part, light energy distribution is more concentrated, the problem that light energy received by a photocatalyst is not uniform in distribution is solved, and therefore the hydrogen production performance of the photocatalyst of unit mass is improved.

The invention relates to the technical field of photo-assisted electro-catalysis, and discloses a modified molybdenum disulfide / carbon-based composite material and a preparation method and application thereof, and the modified molybdenum disulfide / carbon-based composite material comprises an entangled carbon-based material; low-defect MoS2 is embedded in the entangled carbon-based material and on the surface of the entangled carbon-based material; the surface of the entangled carbon-based material is partially coated with a hydrophilic polymer. The preparation method comprises the following steps: uniformly mixing the low-defect MoS2 and the entangled carbon-based material, adding a hydrophilic polymer solution, stirring at room temperature for 30 minutes, and drying to obtain the modified molybdenum disulfide / carbon-based composite material. The modified molybdenum disulfide / carbon-based composite material is used for photo-assisted electro-catalysis hydrogen production. According to the modified molybdenum disulfide / carbon-based composite material provided by the invention, the hydrophilic and hydrophobic properties are improved, and a larger contact area and a larger mass transfer rate are brought, so that the overall hydrogen production performance is obviously improved.

This invention discloses a Zn-coordinated sulfur interstitial Zn x Cd 1‑x Preparation method and application of S crystal materials. This invention is the first to use alkaline ammonia gas to prepare Zn crystal materials. x Cd 1‑x In S crystal materials, sulfur interstitial material is selectively coordinated around Zn to obtain Zn-site coordinated sulfur interstitial material. x Cd 1‑x S crystal material. Zn prepared according to this invention. x Cd 1‑x S-crystal materials, due to their unique coordination structure and composition, possess highly efficient reactivity and can serve as efficient photocatalysts for hydrogen production. The preparation method of this invention is simple, controllable, low-cost, and uses readily available raw materials, making it suitable for large-scale production.

The application provides an integrated water purification hydrogen production device, and belongs to the technical field of hydrogen water preparation. The device comprises a water purification tank, a hydrogen injection assembly, a first driving assembly, a hydrogen gas backfeeding assembly and a whipping assembly. One end of the hydrogen injection assembly extends to the outside of the water purification tank and is connected with a hydrogen generator, and the other end extends to the inside of the water purification tank. The first driving assembly is installed on the top of the water purification tank and is used to drive the hydrogen injection assembly to rotate in the water purification tank, so as to deliver hydrogen to different positions in the water body. Compared with the prior art, the embodiment of the application can whip and disperse the hydrogen bubbles delivered into the water body when hydrogen is produced in the water body, thereby improving the dissolution effect of hydrogen in the water body. After the hydrogen gas floats out of the water surface, the floated hydrogen gas can be backfed into the water body, so that the floated hydrogen gas participates in the hydrogen production process again, thereby reducing the waste of hydrogen and improving the utilization rate of hydrogen.

The application discloses a vanadium salt hetero-support and a preparation method and application thereof, and belongs to the field of material preparation and catalysis technology. The vanadium oxide-vanadium carbide hetero-support is prepared by a precursor method, vanadium salt is uniformly mixed with an organic carbon source, stirring and dissolving are conducted, drying and filtering are conducted, and a vanadium oxide-vanadium carbide hetero-support precursor is obtained, and the precursor is calcined in an argon or nitrogen atmosphere to obtain the vanadium salt hetero-support. The raw material used is low in price, the process is simple, no flammable and explosive gas is generated in the calcination process, the safety factor is high, the target product is generated by one-step calcination, impurities are not easily introduced, and the repeatability is high. The method is based on the theory of strong and weak metal carrier interaction, and a two-component vanadium salt hetero-support is used as a catalyst base, the catalyst sintering problem caused by Ostwald ripening, particle aggregation and migration is overcome, and thus a catalyst with good stability and good catalytic performance is obtained.

This invention belongs to the field of photocatalysis and discloses a hollow Cu 2‑x S@CuCo2S4 core-shell structured materials, their preparation methods, and applications. The above-mentioned hollow Cu... 2‑x S@CuCo2S4 core-shell structure material includes hollow Cu 2‑x S, and through hydrothermal reaction in hollow Cu 2‑x In-situ grown nanoflower CuCo2S4 layers on S. The preparation method includes: ultrasonically dispersing Cu2O in water, then adding Na2S·9H2O, and reacting to obtain Cu2O@Cu. 2‑x S; Cu2O@Cu 2‑x S acid etching yields hollow Cu 2‑x S; hollow Cu 2‑x S is dispersed in water, and cobalt chloride, copper chloride, thiourea, and ethylene glycol are added. After a hydrothermal reaction, hollow Cu is obtained. 2‑ x S@CuCo2S4 core-shell structured material. This core-shell material, when used as a photocatalyst in photocatalytic water splitting for hydrogen production, exhibits high hydrogen production capacity and good cycle stability.

The application belongs to the technical field of sewage treatment, and specifically discloses a biological membrane reactor for a sewage treatment system and hydrogen production, which comprises an ascending bed and a descending bed, the outlet end of the ascending bed is connected with the descending bed through a first reactor which is downwardly inclined, the outlet end of the descending bed is connected with the ascending bed through a second reactor which is upwardly inclined, and a circulating loop is formed, the flow direction of which is the ascending bed, the first reactor, the descending bed and the second reactor in sequence. The biological membrane reactor for the sewage treatment system and hydrogen production is used to optimize the hydrogen production performance of chemical substances in sewage by means of an external voltage, regulation and control of a fluid circulation path and fluidization speed, so that sewage purification and long-acting and stable production of biological hydrogen are simultaneously realized.

The present invention belongs to the technical field of hydrogen production equipment, and specifically discloses a portable chemical hydrogen generator, including a casing, one side of which is recessed inward to form a receiving portion for placing a fuel tank; a protective cover is provided in the receiving portion, and the protective cover is movably connected to the casing, so that the protective cover can be hidden in the receiving portion and can be moved out of the receiving portion during hydrogen production to provide a placement space for the fuel tank; a hydrogen production component is provided in the casing, and the hydrogen production component includes a water inlet pipe and an air outlet pipe; two quick-plug female heads connected to the water inlet pipe and the air outlet pipe are provided in the protective cover, and a quick-plug male head is provided on the top cover of the fuel tank, and when the quick-plug female head is correspondingly inserted into the quick-plug male head on the fuel tank, the water inlet pipe and the air outlet pipe are connected to the fuel tank. The present invention has the advantages of small size, good stability, convenient carrying and transfer, simple fuel replacement, good hydrogen production effect, etc., and can meet the corresponding needs of field hydrogen equipment including fuel cells.

The invention relates to the field of garbage treatment, in particular to an organic household garbage hydrogen production device. The existing equipment is difficult to fully dry and scatter household garbage, so that the pyrolysis of the household garbage is insufficient, and the hydrogen production effect of the household garbage is not good enough. The invention discloses a device for producing hydrogen from organic household garbage. The device comprises a pyrolyzing furnace, an electric sealing door, a shell and the like, an electric sealing door is fixedly connected to the top of the pyrolyzing furnace, a shell is fixedly connected to the electric sealing door, and two feeding pipes are fixedly connected to the shell. The rotating frame rotates to scatter the household garbage falling on the electric sealing door, and the stirring frame rotates to stir the household garbage in the feeding pipe, so that the household garbage in the feeding pipe can be in more sufficient contact with the air outlet pipe, moisture in the household garbage is more sufficiently evaporated, and the household garbage is more dry; and therefore, the household garbage can be pyrolyzed more sufficiently, and the hydrogen production effect of the household garbage is better.

The utility model provides a testing device for improving hydrogen production effect, which comprises an electrolysis component, a gas recovery component and an electrolyzed water component, and compared with the prior art, the testing device has the following beneficial effects that the electrolysis component is arranged, an illumination part is arranged on the lower side surface of an electrolysis tank, and titanium oxide is arranged on the surface of an anode; after the anode and the cathode are powered on, the illumination part is started to provide an additional energy source, and by adding the illumination part, light energy can be provided, the electrolytic reaction can be excited, so that the generation of hydrogen is promoted, and the hydrogen production efficiency can be improved; when the electrolyzed water assembly supplies electrolyzed water to the electrolysis assembly, the heating piece heats the electrolyzed water to increase the activity and kinetic energy of electrolyzed water molecules, the reaction rate is increased, the reaction rate is usually increased along with temperature rise within a certain temperature range, and therefore the electrolyzed water can be heated to improve the efficiency of the electrolytic reaction and the hydrogen production rate.

The invention discloses a portable hydrogen generation and storage integrated device. The device comprises a box body, a collecting tank, an electrolytic tank, a purifying tank, a box cover and a controller, wherein the collecting tank, the electrolytic tank and the purifying tank are arranged in the box body; the box cover is arranged at the top of the box body; a plurality of solar panels are embedded in the box cover at intervals, the lower surfaces of the solar panels are fixedly connected with a photocatalyst box, and the photocatalyst box is opposite to the top of the electrolytic cell; a positive electrode and a negative electrode are arranged on two opposite sides of the electrolytic bath; the electrolytic tank communicates with the purification tank through a first electromagnetic valve; a plurality of molecular sieves for adsorbing oxygen are fixedly connected to the inner side wall of the purification tank; a storage battery is fixedly connected to the inner side wall of the purification tank and is electrically connected with the solar panel; the purifying tank is communicated with the collecting tank through a second electromagnetic valve and a gas pipe. According to the invention, electrolysis and photocatalytic hydrogen production are carried out on water at the same time, the generation rate of hydrogen is accelerated, mixed oxygen is removed through the synergistic effect of the deoxidizer and the molecular sieve, and the purity of hydrogen is improved.

The invention discloses an integrated plastic pole frame polar plate with a pressure and flow adjusting structure and an electrolytic bath, and belongs to the technical field of water electrolysis hydrogen production equipment. The integrated plastic pole frame polar plate comprises a pole frame body and a polar plate integrally formed with the pole frame body, and a plurality of metal sheets with pressure and flow adjusting structures are embedded in the polar plate; the adjusting structure is a concave notch and is arranged at the top of the metal sheet, or the adjusting structure is a through hole and is arranged in the middle of the metal sheet. The electrolytic bath comprises end pressing plates and a plurality of electrolytic cells which are arranged between the end pressing plates and are connected in series; the small electrolysis chamber comprises the integrated plastic electrode frame polar plate. The structures capable of adjusting the pressure and the flow are arranged on the metal sheets of the integrated plastic electrode frame polar plate and used for automatically adjusting the pressure and the flow between the adjacent metal sheets in the electrolyte flowing process, so that the hydrogen production effect of the electrolytic cell is improved; the technical problems of uneven pressure, uneven hydrogen and oxygen production, uneven temperature, reduction of electrolysis efficiency and the like caused by uneven flow in an existing electrolytic cell are effectively solved.

The application relates to the technical field of formic acid hydrogen production catalysts, in particular to application of a molybdenum carbide catalyst in formic acid hydrogen production. The molybdenum carbide catalyst is prepared by mixing, drying and then pyrolyzing ammonium molybdate tetrahydrate, citric acid and water under a protective atmosphere, and the preparation method is simple, and the raw materials are cheap and easy to obtain. When the molybdenum carbide catalyst is used to catalyze the formic acid hydrogen production reaction, the required reaction temperature is low, the hydrogen production rate is excellent, the stability is good, and the hydrogen production performance is good.

The invention discloses an electrolytic hydrogen production system which comprises a hydrogen production module, a total electrolyte tank, a first electrolyte tank and a second electrolyte tank, the hydrogen production module comprises a front end plate and a rear end plate, a plurality of anode plate assemblies and cathode plate assemblies are arranged between the front end plate and the rear end plate at intervals, and meanwhile, the total electrolyte tank is connected with the first electrolyte tank and the second electrolyte tank. A diaphragm piece is arranged between each adjacent anode plate assembly and cathode plate assembly, and the front end plate, the rear end plate, all the anode plate assemblies, all the cathode plate assemblies and all the diaphragm pieces press against one another and are fixedly connected through a plurality of bolts; the electrolyte at the position of the anode plate and the electrolyte at the position of the cathode plate can circularly flow, and the two electrolytes cannot be mixed, so that oxygen and hydrogen in the two electrolytes cannot be mixed, the exhaust purity of the hydrogen and the oxygen is high, the manufacturing is simple, the cost is low, and the application range is wide. A plurality of anode plates and cathode plates are arranged at intervals, so that rapid reaction is realized.

The invention discloses a modified TiO2 photocatalytic material and a preparation method and application thereof.The modified TiO2 photocatalytic material comprises a modified Sn / TiO2 photocatalytic material and metal Pt atoms doped in the modified Sn / TiO2 photocatalytic material.The TiO2 is modified with metal Sn and Pt, the size of the photocatalytic material can be reduced, then the specific surface area of the photocatalytic material is increased, and the photocatalytic performance of the photocatalytic material is improved. According to the present invention, the hydrogen production performance of the photocatalytic material in the practical application is improved, and the different doping amounts are selected so as to accurately select the doping ratio of the photocatalyst, such that the hydrogen production performance of the photocatalytic material is further improved.

The invention provides a nano hydrogen production material as well as a preparation method and application thereof, and the method comprises the following steps: mixing metal nanoparticles, inorganic metal zirconium salt, binary aromatic carboxylic acid and an acetic acid aqueous solution, carrying out microwave-assisted heating reaction, cooling at room temperature, and centrifuging to obtain a product 1; uniformly mixing the product 1 with a monobasic fatty acid aqueous solution, carrying out microwave reaction, cooling at room temperature, purifying, centrifuging and drying to obtain a product 2; the product 2 and a transition metal salt ethanol solution are subjected to ultrasonic uniform mixing, then a thioacetamide aqueous solution is dropwise added, a microwave reaction is carried out, after the reaction is completed, room temperature cooling and purification centrifugal drying are carried out, and the nano hydrogen production material is obtained. According to the invention, a microwave method is adopted to simply, conveniently and rapidly prepare the nano cadmium sulfide with a wrinkled surface and an octahedral hollow structure, the nano cadmium sulfide with visible light absorption grows in a pore channel of the organic-inorganic hybrid nano hybrid material in a confinement manner, and the prepared photocatalyst shows excellent catalytic performance of photocatalytic decomposition of water to produce hydrogen.