43results about How to "Improve reaction kinetics" patented technology

The invention provides a preparation method of spherical iron phosphate, and relates to the technical field of lithium ion batteries, and the preparation method comprises the following steps: S1, one-step reaction: carrying out parallel flow on an iron salt solution, a phosphorus salt solution and ammonia water according to a molar ratio of 1: (0.8-1.2): (0.8-1.1) to generate amorphous iron phosphate slurry; adding ammonia water into the iron phosphate slurry to adjust the pH value to 1.5-2.5; s2, membrane washing; s3, a second-step reaction: adding pure water into the washed iron phosphate slurry, adjusting the iron concentration to 0.5-1.2 mol / L, adding a phosphoric acid solution, heating to 90-120 DEG C, and controlling the heat preservation time for 30-90 minutes after the material is converted into a white material, so as to obtain white slurry; s4, washing: taking a filter cake; s5, drying: generating iron phosphate dihydrate; s6, calcining: spherical iron phosphate is generated, and the iron phosphate is successfully converted from a traditional olive type, peanut type or honeycomb type to a spherical type through the preparation method provided by the invention.

The invention discloses a preparation method of a circulation type gas diffusion electrode for electrochemical CO2 reduction, and belongs to the technical field of electrochemical CO2 reduction. The circulation type gas diffusion electrode directly conveys carbon dioxide to the surface of a cathode in the electrochemical CO2 reduction process; the specific preparation method comprises the following steps: adding N-methyl-2-pyrrolidone into polyethyleneimine, and carrying out ultrasonic treatment; the preparation method comprises the following steps: adding copper powder into a transparent and uniform mixed solution of N-methyl-2-pyrrolidone and polyethyleneimine, and carrying out magnetic stirring; and calcining the uniform mixture of N-methyl-2-pyrrolidone, polyethyleneimine and copper powder and the hollow fiber of polyethyleneimine and copper powder in a smelting furnace to obtain the FTGDE electrode. By adopting the preparation method of the circulation type gas diffusion electrode for electrochemical CO2 reduction, disclosed by the invention, efficient transmission and utilization of carbon dioxide are ensured, and the electrochemical reduction reaction efficiency is improved.

The invention provides a negative pole piece and a lithium ion battery, the negative pole piece comprises a current collector, a first electrode material layer and a second electrode material layer, the first electrode material layer and the second electrode material layer are sequentially stacked on the current collector along a direction far away from the current collector, and the first electrode material layer and the second electrode material layer both comprise active materials. The active material comprises first active material particles and second active material particles, the particle size of the first active material particles is larger than that of the second active material particles, and the total mass of the first active material particles in the first electrode material layer is smaller than that of the second active material particles; the total mass of the first active material particles in the second electrode material layer is greater than the total mass of the second active material particles. The cycle performance and the electrical performance of the battery cell can be improved by regulating and controlling the ratio of the first active material particles to the second active material particles in the first electrode material layer and the second electrode material layer.

The invention provides a modified flow battery electrode capable of simultaneously improving activity and stability and a preparation method thereof.The method comprises the following steps that a carbon felt electrode material is added into a mixed solution of stannic chloride, manganous nitrate, melamine and urea, high-pressure treatment, ultrasonic cleaning and drying are conducted after magnetic stirring, and the modified electrode is obtained; adding the modified electrode into a mixed solution of nickel nitrate, melamine and urea, performing magnetic stirring, high-pressure treatment, ultrasonic cleaning and drying to obtain a modified electrode, immersing the modified electrode into a mixed solution of nickel nitrate, dopamine hydrochloride, polyamino acid, sodium citrate and ethanol, performing washing and drying, and then performing high-temperature treatment and pickling and drying to obtain an activated electrode; the voltage efficiency, the energy efficiency and the peak power density are greatly improved, the electrocatalytic activity of the flow battery is remarkably improved, and the stability of the electrode is also greatly improved while the electrocatalytic activity is improved.

This invention relates to the field of hafnium carbide technology and discloses a thermal decomposition preparation process for hafnium carbide precursors. The process includes: dissolving hafnium tetrachloride in anhydrous ethanol, adding propylene oxide dropwise for neutralization and acid removal to obtain a neutral ethanol-hafnium precursor solution; adding ethyl acetoacetate methacrylate and heating for coordination to obtain a hafnium coordination monomer solution; adding acrylonitrile and an initiator and heating for polymerization; when the viscosity of the reaction solution increases, injecting a dimethyl sulfoxide hot solution of melamine as a locking liquid; precipitating, separating, and drying to obtain the hafnium carbide precursor; and after oxidative crosslinking treatment, calcining at high temperature under an inert atmosphere to undergo carbothermic reduction to obtain hafnium carbide powder. This invention achieves molecular-level dispersion of precursor components through liquid-phase coordination and in-situ network locking, effectively reducing the reaction temperature and inhibiting grain agglomeration, thus producing high-purity, ultrafine hafnium carbide powder.

The invention relates to a preparation method of a seaweed derived alloy carbon sodium ion battery negative electrode material, and belongs to the technical field of sodium ion batteries, and the specific scheme comprises the following steps: step 1, drying cleaned seaweed leaves; 2, chopping the dried seaweed leaves, and calcining and carbonizing the chopped seaweed leaves and an activating agent; 3, washing the carbonized material with deionized water until the carbonized material is neutral, and drying to obtain a seaweed precursor; and 4, uniformly grinding the seaweed precursor and two metal salts, and reacting under microwave radiation to obtain the seaweed-derived alloy carbon sodium ion battery negative electrode material. The seaweed-derived alloy carbon prepared by the method can generate more active sites to store sodium ions, and the diffusion rate of the sodium ions is improved, so that the electrochemical performance is improved. In addition, in the synthesis process, the speed is very high, no solvent exists, and the yield is high.

The invention discloses a low-temperature-resistant negative electrode zinc paste and a low-temperature alkaline zinc-manganese battery containing the zinc paste. The negative electrode zinc paste comprises the following components in parts by weight: 60-65 parts of zinc powder, 1-2 parts of a composite conductive agent, 0.1-0.3 part of a composite corrosion inhibitor and 35-38 parts of a low-temperature electrolyte; the low-temperature electrolyte comprises a multi-element nonionic surfactant system, a multi-element nano anti-freezing agent system and a mixed solution A, the 3.9 ohm discharge capacity of the battery under the condition of-40 DEG C is larger than or equal to 60% compared with the capacity retention rate at normal temperature, the interface impedance amplification is smaller than or equal to 15%, the hydrogen evolution amount is reduced by 80% on year-on-year basis, the process is compatible with an existing production line, and the battery is suitable for polar scientific investigation and electronic equipment in plateau and cold regions.

This invention belongs to the field of material surface treatment technology, specifically relating to a wafer polishing slurry, its preparation method, and its application. The wafer polishing slurry comprises abrasives, oxidants, dispersants, surfactants, pH adjusters, and water. The components of the wafer polishing slurry work synergistically, shortening polishing time and improving polishing efficiency when applied to wafer polishing. Furthermore, it significantly improves the surface quality of the polished wafer, markedly reducing scratches and defects, and lowering surface roughness to below 0.15 nm, thus meeting the surface quality requirements of fields such as power electronics and radio frequency devices.

This invention discloses Ni2Fe(SO4) 0.5 (OH)6(H2O) 3.85 This paper discusses / NF catalysts, their preparation methods, and applications, belonging to the field of catalyst synthesis technology. Using large-size nickel foam as a substrate, Ni₂Fe(SO₄) is directly prepared through one-step in-situ microwave-driven growth. 0.5 (OH)6(H2O) 3.85 The nanosheet array eliminates the need for subsequent loading or additional processing, simplifying the process and enhancing the bond between the catalyst and the substrate. This catalyst exhibits excellent performance in hydrogen production via water electrolysis, particularly in seawater electrolysis.

The invention discloses a WS2 / W composite material, a preparation method thereof and application of the WS2 / W composite material in a sodium-sulfur battery. The preparation method comprises the following steps: uniformly stirring isopropanol and acetone to obtain a mixed solution A; weighing tungsten hexachloride, adding the tungsten hexachloride into the mixed solution A, and uniformly stirring to obtain a mixed solution B; transferring into a reaction kettle, sealing and putting into a drying oven for reaction; after the reaction is finished, carrying out suction filtration and washing on a product by using industrial alcohol, and drying in a vacuum oven to obtain W18O49 powder; the method comprises the following steps: weighing W18O49 powder and sublimed sulfur, respectively and correspondingly placing the W18O49 powder and sublimed sulfur in a first porcelain boat and a second porcelain boat, then placing the second porcelain boat in the first porcelain boat, placing the second porcelain boat in a tubular furnace, introducing argon into a furnace chamber of the tubular furnace, after the pressure of the furnace chamber is increased to 0.2-0.3 MPa, keeping the airtightness of the system, heating to 1100-1300 DEG C at the rate of 20 DEG C / min, keeping the pressure at 0.2-0.3 MPa in the heating process, and keeping the temperature for 2-3 hours; and after the temperature reaches 1100-1300 DEG C, continuously preserving heat for 2 hours, introducing argon, cooling to room temperature, and collecting to obtain WS2 / W powder. The problems of poor conductivity of the sulfur positive electrode, polysulfide shuttle effect and slow reaction kinetics are solved.

The invention relates to the technical field of photocatalysts, in particular to a nonmetal plasmon heterojunction material, a preparation method and application thereof and a method for preparing p-aminophenol through reduction of p-nitrophenol. The nonmetal plasmon heterojunction material provided by the invention comprises a C3N4 nanosheet and a WO3-x nanoplate (x is 0.1 to 0.3) positioned on the surface of the C3N4 nanosheet. The WO3-x local surface plasmon characteristic can effectively expand the spectral response range of the non-metal plasmon heterojunction material in a visible region to a near-infrared region, and the light absorption efficiency of the non-metal plasmon heterojunction material is remarkably enhanced. The nonmetal plasmon heterojunction material provided by the invention can realize efficient reduction of p-nitrophenol based on the synergistic effect of an interface heterojunction, a built-in electric field and oxygen vacancies, is high in selectivity, has excellent photocatalytic activity for reduction of p-nitrophenol, and is excellent in photocatalytic activity stability.

The invention discloses a semi-metal doped Fe-based monatomic catalyst as well as a preparation method and application thereof, relates to a Fe-based monatomic catalyst as well as a preparation method and application thereof, and aims to solve the problem that an iron-based non-noble metal monatomic catalyst is insufficient in activity and stability in an oxygen reduction reaction. According to the catalyst disclosed by the invention, atoms of Fe and Sb form atom pairs and are embedded into a carbon carrier, a Fe = 2N = Sb coordination structure is shown, and meanwhile, a hydroxyl group is formed in the axial direction of the Sb atom. The preparation method comprises the following steps: carrying out heat treatment on ZIF-8 to obtain an N-doped porous carbon material, uniformly mixing the N-doped porous carbon material with Fe salt and Sb salt solutions, drying by distillation, and carrying out heat activation to obtain the catalyst. After the prepared electrode is aged for 30,000 circles in a 0.1 M HClO4 solution, the half-wave potential is only reduced by 18mV. The assembled proton exchange membrane fuel cell has power densities of 1098.3 mW / cm < 2 > and 613.41 mW / cm < 2 > under hydrogen-oxygen and hydrogen-air conditions, and can be used in the field of fuel cells.

The invention relates to the technical field of batteries, in particular to a negative electrode material and a preparation method thereof, a negative electrode plate and a sodium ion battery. The negative electrode material is prepared from WOx-W2C heterojunction nano particles and an MXene material, the MXene material has an accordion-shaped layered structure, and the WOx-W2C heterojunction nanoparticles are loaded on the surface of the MXene material and between the surface of the MXene material and the layered structure of the MXene material. The negative electrode material disclosed by the invention shows high reversible specific capacity and excellent super-long cycle stability, and the electrochemical performance of the sodium ion battery can be remarkably improved.

The invention provides a bimetallic nitride catalyst and a preparation method and application thereof, and relates to the technical field of catalysts.The preparation method comprises the steps that ferric nitrate and soluble starch are added into water and stirred to be gelatinized, and gelatinized liquid is obtained; adding zinc nitrate, dicyandiamide and cobalt nitrate into the gelatinized liquid, and uniformly stirring to obtain hydrogel; the hydrogel is subjected to freeze drying, and aerogel is obtained; the aerogel is placed in an ammonia atmosphere, heat preservation is conducted for 2-6 h at the temperature of 850-950 DEG C, the bimetallic nitride catalyst containing the iron-cobalt nitride is obtained, and the bimetallic nitride catalyst is high in oxygen reduction reaction activity and cycling stability.

The invention discloses a ternary metal telluride bifunctional catalyst for hydrogen production from water and a preparation method thereof.The preparation method comprises the specific steps that ferric nitrate nonahydrate, cobalt nitrate hexahydrate, nickel nitrate hexahydrate and fumaric acid serve as raw materials, the raw materials are stirred to be uniform in N, N-dimethylformamide, and Fex (CoNi)-MOF is obtained through reaction under specific conditions of a reaction kettle, centrifugation, cleaning and drying; then carrying out high-temperature calcination on the Fex (CoNi) Tex and tellurium powder according to a specific ratio in H2 / Ar mixed gas to prepare Fex (CoNi) Tex; fex (CoNi) Tex is loaded on foamed nickel, the catalyst material Fex (CoNi) Te (at) NF is prepared, and Fe2 (CoNi) Te (at) NF has excellent HER and OER catalytic activity, has rich active sites and has the excellent characteristics of low overpotential, excellent dynamics, small impedance, good cycling stability and the like. The efficient non-noble metal catalyst which is low in cost and excellent in catalytic activity is provided for hydrogen production through water electrolysis, and the commercialization process of the hydrogen production technology can be powerfully promoted.

The present invention discloses an electrostatically self-assembled SnO2@NDPC / MXene nanocomposite material, and a preparation method and application thereof. The method comprises: using a deep low eutectic solvent to prepare nitrogen-doped porous carbon (NDPC), dripping a SnCl2 solution into its acetone dispersion, and calcining to obtain a composite material (SnO2@NDPC) embedded with ultrafine SnO2 nanoparticles. The prepared MXene and SnO2@NDPC with opposite charges are electrostatically self-assembled in an aqueous solution and freeze-dried to obtain a SnO2@NDPC / MXene nanocomposite material. The method avoids the unfavorable conditions of easy oxidation during the preparation of the MXene composite material, and the obtained nanocomposite material has a highly conductive multi-level structure, which promotes electron transport and Li + The migration of SnO2 and the volume expansion during the charge and discharge process are alleviated. This material has a good application prospect as a negative electrode material for lithium ion capacitors.

The invention belongs to the field of electrochemical energy storage, and relates to an efficient electrocatalyst for enhancing the performance of zinc air batteries (ZABs), in particular to a preparation method and application of a Co-N-C catalytic material constructed by adjusting the electronic characteristics of Co. According to the preparation method provided by the invention, sp hybrid nitrogen (sp-N) is introduced into a Co-N-C matrix, and an electronic structure of an electrocatalytic active site is regulated and controlled to accelerate reaction kinetics and improve conductivity, so that oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are remarkably enhanced. The catalyst shows efficient activity and excellent cycling stability, so that the catalyst shows excellent performance and stability in application of advanced zinc air batteries, and important technical support is provided for constructing an efficient and lasting electro-catalysis system.

This invention relates to the field of membrane technology, specifically to a nitrogen-doped carbon nanofiber catalytic membrane loaded with monatomic iron, its preparation method, and its application. It includes the following steps: (1) dissolving polyacrylonitrile and ferric chloride hexahydrate in a solvent to obtain an electrospinning precursor solution; (2) electrospinning the electrospinning precursor solution to obtain a precursor fiber membrane; (3) calcining the precursor fiber membrane under a protective atmosphere to obtain a nitrogen-doped carbon nanofiber catalytic membrane loaded with monatomic iron. The nitrogen-doped carbon nanofiber catalytic membrane loaded with monatomic iron prepared by this invention achieves near-complete utilization of metal atoms in advanced oxidation processes, significantly improving pollutant degradation activity and reaction kinetics; this material also possesses excellent structural stability and recyclability, providing a new design concept and technical path for developing efficient and scalable water treatment catalytic materials.

The invention discloses a bimetal organic gel electrode material suitable for wide power fluctuation and a preparation method and application thereof.The preparation method of the bimetal organic gel electrode material comprises the following steps that transition metal nickel salt and transition metal cobalt salt are dissolved in ethyl alcohol, and transition metal salt mixed liquid is obtained; under the atmosphere of nitrogen or inert gas, dropwise adding the transition metal salt mixed solution into the terephthalic acid mixed solution at the temperature of 70-90 DEG C, continuously performing solvothermal reaction at the temperature of 70-90 DEG C to obtain a colloidal suspension, centrifuging to obtain a precipitate, washing, and performing vacuum drying to obtain the bimetallic organic gel electrode material, the bimetallic organic gel electrode material has excellent electro-catalytic hydrogen evolution and oxygen evolution activity, has low overpotential in the HER process in an alkaline environment, has the lowest overpotential of 28 mV, still keeps good stability under different large current densities, and has good electrochemical activity and wide power stability.

The invention discloses a method for improving ammonium storage performance of MoO3 through surface engineering. The preparation method comprises the following steps: firstly, growing MoO3 on a carbon cloth substrate by adopting a hydrothermal method; then phosphating the MoO3 to obtain MoO3-P, introducing a P-O bond, and enabling the MoO3 to generate a large number of O vacancies at the same time; and further soaking the MoO3-P in an ammonium sulfate solution to obtain a final product. In a three-electrode electrochemical system formed by the ammonium sulfate electrolyte, the electrochemical performance evaluation on the obtained sample shows that the specific capacity of the sample is up to 260.7 mAh g <-1 > under the current density of 10 mA cm <-2 >, and the capacity value is kept at 98.87% after 2100 charge-discharge cycles.

The invention discloses a contact curvature interface structure modified hollow carbon nanosphere one-dimensional functional material and a preparation method and application thereof, and belongs to the technical field of alkali metal ion battery carbon-based negative electrode materials, and the contact curvature interface structure modified hollow carbon nanosphere one-dimensional functional material is formed by stacking and integrating nitrogen-doped porous hollow carbon nanospheres on a one-dimensional carbon material. The preparation method comprises the following steps: by taking a mixed solution of a carbon-forming nitrogen-containing polymer, a metal salt and a one-dimensional carbon material as a raw material, carrying out electrostatic spinning, carbonization, acid etching and carbon dioxide etching on the raw material to obtain the contact curvature interface structure modified hollow carbon nanosphere one-dimensional functional material. The invention also discloses an application of the one-dimensional functional material in an alkali metal ion battery electrode. The product provided by the invention has excellent alkali metal ion storage capacity, and has important application prospects in the field of high-performance alkali metal ion batteries. The method has the advantages of simple and efficient preparation process, easy operation, low cost and the like, and is suitable for further popularization.

This invention discloses a polyaniline-coated copper-based Prussian blue analog composite cathode material, its preparation method, and its application in secondary seawater batteries. The cathode material uses carbon cloth as a conductive substrate. First, a copper layer is formed on the surface of the carbon cloth by electrodeposition, followed by oxidation to obtain copper oxide nanosheets. Then, copper-based Prussian blue analog nanosheets are generated through in-situ conversion induced by potassium ferricyanide and ligands. Finally, aniline is oxidatively polymerized under acidic and low-temperature conditions to construct a polyaniline conductive coating layer on the surface of the copper-based Prussian blue analog nanosheets, resulting in the CuHCF@PANI / CC composite cathode material. This material combines a three-dimensional open nanosheet array structure with a uniform polyaniline protective layer, effectively improving electron transport capability, reducing the desolvation barrier of hydrated metal ions and interfacial transport resistance, buffering volume changes during charge and discharge, and suppressing the dissolution of active materials and electrolyte side reactions. This cathode material is suitable for secondary seawater batteries using seawater as the electrolyte, exhibiting high specific capacity, rate performance, and cycle stability, which is of great significance for the development of safe, low-cost, and sustainable energy storage technologies.

The application discloses a nitrogen-doped carbon lithium-sulfur battery positive electrode carrier material with directional pores and iron monatomic anchoring, and a preparation method and application thereof, and belongs to the technical field of lithium-sulfur battery positive electrode materials. Graphene oxide and cellulose nanofibers are dispersed in water to form a dispersion liquid; a mixed metal salt solution prepared by zinc salt and iron salt is added to the dispersion liquid, and a composite hydrogel is formed through electrostatic self-assembly; the composite hydrogel is placed on a pre-cooled metal substrate to perform directional freezing and freeze-drying, and an aerogel precursor with a directional pore structure is obtained; the aerogel precursor is subjected to programmed temperature carbonization with a solid nitrogen source, and a nitrogen-doped carbon lithium-sulfur battery positive electrode carrier material with directional pores and iron monatomic anchoring is obtained. Through the cooperation of directional freezing and gas-phase doping, vertical through pores are constructed, and iron monatomic atoms are anchored, the shuttle effect is inhibited, high specific capacity, excellent rate and long cycle life are realized, and the capacity retention rate reaches 88.5% after 600 cycles at 0.1C.

The invention discloses a process for high-temperature harmless treatment of overhaul slag. The aluminum electrolysis overhaul slag is crushed and mixed with sodium carbonate and calcium carbonate, the sodium carbonate reacts with the overhaul slag at the high temperature to convert a fluorine-containing compound into soluble fluoride, meanwhile, the calcium carbonate is mixed at the high temperature, the soluble fluoride is converted into CaF2, and the fluorine curing effect is achieved. The method can effectively solve the problem of safe disposal of dangerous waste residues generated by electrolytic aluminum, so that the dangerous waste residues meet the environmental protection requirement, and the purpose of comprehensive and harmless treatment of the electrolytic aluminum overhaul waste residues is achieved.

The invention discloses a spherical manganese cobalt oxide loaded nickel molybdenum nanosheet MnCo2O4 / NiMo-LDH, which is prepared by the following steps: preparing a spherical Mn-Co-gly precursor by a hydrothermal method, calcining to obtain spherical manganese cobalt oxide MnCo2O4, and loading layered hydroxide NiMo-LDH by a hydrothermal method by taking MnCo2O4 as a carrier, thereby obtaining the spherical manganese cobalt oxide loaded nickel molybdenum nanosheet MnCo2O4 / NiMo-LDH. The microstructure of the MCO / NiMo-LDH is of a spherical structure, the surface of the MCO / NiMo-LDH is uniformly coated with a nanosheet layer, the size of the MCO / NiMo-LDH is 1.4-1.5 microns, and the NiMo-LDH serves as a carrier and is loaded on the surface of the MCO in situ; meanwhile, the MCO / NiMo-LDH has a core-shell structure, the MCO is the core structure, and the NiMo-LDH is the shell structure. The preparation method comprises the following steps: 1, preparing manganese cobaltate MCO; and 2, preparation of the MCO / NiMo-LDH. When the material is used as a supercapacitor electrode material, the specific capacitance is 900-1000F g <-1 >; and when the number of cycles is 5000, the capacitance retention rate is 70-80%.

The invention relates to an in-situ growth nickel-cobalt nanosheet electrocatalyst and a preparation method and application thereof.Foam metal is soaked in a mixed solution of nickel salt and cobalt salt, the nickel-cobalt nanosheet array electrocatalyst growing on the foam metal in situ is obtained through reaction, and metal more active than cobalt and nickel is selected as the foam metal. Compared with the prior art, the in-situ growth strategy avoids the use of an adhesive, and the prepared nickel-cobalt nanosheet array structure which grows on the foam iron in situ and is regularly arranged is beneficial to accelerating diffusion mass transfer of a catalytic reaction and accelerating rapid desorption of accumulated bubbles and has a large specific surface area; therefore, active sites are fully exposed, the reaction kinetics is improved, and the catalytic activity and stability can be effectively improved.

The application discloses a preparation method of a copper-cobalt-doped carbon nitride electrocatalyst, and a product and application thereof. The copper-cobalt-doped carbon nitride electrocatalyst is prepared by taking 3-amino-1,2,4-triazole as a precursor, 1,10-phenanthroline as a ligand, and a copper source and a cobalt source as metal sources, and has a C3N5 carrier and Cu / Co dispersed in the carrier. The catalyst has rich active sites and excellent conductivity, and through the synergistic effect of copper and cobalt, the hydrogen evolution side reaction is inhibited, and the activity, selectivity and stability of the electrocatalytic reduction of nitrate to produce ammonia are improved. The problems of low activity, low faradic efficiency, poor stability and high cost of the existing electrocatalytic nitrate reduction ammonia catalyst are effectively solved. The preparation method adopts a non-noble metal + non-metal substrate, raw materials are easy to obtain, the preparation process is simple, and the cost is low, and thus the method can realize large-scale production. The obtained catalyst is suitable for the field of electrocatalytic reduction of nitrate to produce ammonia, can realize water nitrate pollutant treatment and high-value ammonia resource recycling, and has dual benefits of environmental protection and economy.

The invention provides a platinum nanoparticle antifouling oxidation reduction metal electrode based on MOF material modification and a preparation method and application thereof, and belongs to the technical field of marine pollution detection. The preparation method comprises the following steps: carrying out electrodeposition on a platinum-based electrode by using K2PtCl4 and CTAB to form a platinum nanoparticle substrate, then mixing BDC-F4 and ZrO (NO3) 22H2O by using a hydrothermal reaction to form a UiO-66-F4 MOF material, and finally putting the electrode into a solution to obtain Pt NPs at UiO-66-F4. The prepared electrode can inhibit adhesion of organic macromolecules in seawater, and has excellent stability.

This invention provides a hydrogen-bonded stable bipolar organic small molecule cathode material, its preparation method, and its application, comprising the following steps: weighing a conductive agent and a binder, adding a solvent, and grinding uniformly to obtain a slurry; uniformly coating the slurry onto a current collector; and drying to obtain the cathode material.

The invention discloses an aqueous zinc-iodine battery electrolyte additive, an electrolyte preparation method and an aqueous zinc-iodine battery preparation method, 3-chloro-2-hydroxypropyl trimethyl ammonium chloride is used as a multifunctional electrolyte additive, and reversible four-electron conversion reaction is realized by synergistically regulating and controlling a zinc ion solvation structure and stable iodine positive ions, so that the zinc-iodine battery electrolyte additive is obtained. The energy density and the cycling stability of the water-based zinc-iodine battery are greatly improved, and dendritic crystal generation and side reaction can be inhibited. The electrolyte is composed of ZnSO and CHPTAC, and the pH value of the electrolyte is 5-6. The positive electrode of the iodine battery adopts a current collector-free structure, and a self-supporting electrode is prepared by compounding iodine and activated carbon and combining with carbon nanotube slurry. The zinc-iodine total battery constructed by the electrolyte and the iodine positive electrode has remarkable performance advantages.