763results about "Electrolytic inorganic material coating" patented technology

A method of additively manufacturing an aircraft part, having steps of: forming a base, defining a shape of the aircraft part, out of first thermoplastic polymer; forming a lower support surface onto discrete locations of the base by printing a mixture of a second thermoplastic polymer and a catalyst compound formed with metal onto the discrete locations, such that the lower support surface is formed with cavities; and forming an upper support surface by depositing, via electrolysis deposition, a metal plating onto the lower support surface along the discrete locations, to thereby form the aircraft part.

A bias-free driven ion-based photoelectrochemical wastewater treatment system and method is disclosed. Through an ion-coupled photogenerated electron-assisted photocatalytic oxidation-reduction pathway, the system achieves efficient treatment of high-salinity wastewater. The system employs electron-ion receptor materials as the counter electrode, providing reaction sites to drive the coupling of photogenerated electrons and cation transfer. Additionally, the voltage generated by the system directly drives hole oxidation to produce strong oxidizing free radicals. Furthermore, this ion-based photoelectrochemical system demonstrates excellent degradation performance in high-concentration chloride media. This indicates that, in addition to cations (such as Na+) helping to accelerate the electron transfer rate, the presence of Cl− further enables efficient and sustainable wastewater treatment. The concept proposed in this invention emphasizes the potential for using abundant sodium chloride in seawater as an inexpensive additive for wastewater treatment.

The invention relates to a NiCoW-CoP / Co3O4 (at) NF self-supporting heterostructure catalyst and a preparation method thereof. The preparation method comprises the following steps: preparing a CoP-coated NF precursor on foamed nickel through a constant potential electrodeposition method, then carrying out annealing treatment in a muffle furnace, and finally carrying out electrodeposition on NiCoW-LDH to obtain the NiCoW-CoP / Co3O4-coated NF material. According to the preparation method, the microsphere material with the surface covered with the dendritic dendrites is synthesized, and exposure of active sites is increased through the special surface structure of the microsphere material. The compounding of the trimetal hydroxide containing high-valence tungsten and the introduction of oxygen vacancies can effectively enhance the local electron density of oxygen atoms on the surface of the catalyst, thereby enhancing the catalytic performance and seawater corrosion resistance of the material. Compared with the prior art, the method disclosed by the invention is simple to operate and low in cost, and the prepared catalyst has high electrocatalytic activity, relatively low hydrogen evolution overpotential and oxygen evolution overpotential and long-time stability. And the method has important theoretical significance and potential application value for developing a bifunctional electrocatalyst suitable for electrolyzing seawater.

The invention relates to the technical field of electroplating, and particularly discloses a nickel-tungsten-phosphorus plating layer electroplating process which comprises the following steps: S1, preparing a nano composite electroplating solution which comprises nickel salt, tungstate, hypophosphite, nano silicon carbide powder, ZIF-67 (at) MXene core-shell nanosheets, a composite complexing agent and water; s2, plasma mixed gas is adopted for conducting etching treatment on the surface of the workpiece to be plated; s3, electroplating the to-be-electroplated workpiece subjected to surface treatment under the action of pulse current and an alternating magnetic field, and performing ultrasonic stirring on the composite electroplating liquid in the electroplating process; and S4, under nitrogen protection, the workpiece is subjected to annealing treatment. According to the electroplating process, through the synergistic effect of the nano SiC and the ZIF-67 (at) MXene, the component uniformity and the structural compactness of the nickel-tungsten-phosphorus coating can be effectively improved, and then the corrosion resistance of the nickel-tungsten-phosphorus coating in the complex oil gas environment is effectively improved.

The invention discloses a preparation method of a rare earth element doped nickel-based selenide nano-material and application of the rare earth element doped nickel-based selenide nano-material in electro-catalysis water full-hydrolysis reaction. According to the method, nickel salt, cerium salt, selenium dioxide and potassium chloride are prepared into electrolyte, and the electrolyte is subjected to electro-deposition on a foamed nickel substrate to obtain Ce-doped Ni0.85Se nanoparticles growing on foamed nickel. The crystal structure and electron distribution of Ni0.85Se are optimized by doping trace rare earth element cerium, so that the HER and OER performances of the Ni0.85Se are greatly improved. The prepared catalyst is self-supporting closely-packed nanoparticles, the formed amorphous structure is easy to expose more active sites, the catalyst has good electrocatalytic hydrogen evolution and oxygen evolution performance under alkaline conditions, the overpotential in electrocatalysis of nickel-based selenide is greatly reduced, and the electrocatalytic performance of nickel-based selenide is improved. And excellent electro-catalytic activity is shown in electro-catalytic water full hydrolysis. And the self-supporting electrode is not easy to fall off due to generation of bubbles in the reaction process, so that the working stability of the catalyst is improved.

The invention discloses an electroplating additive solution, a preparation method and a hard silver graphene electroplating mixed solution. The electroplating additive solution comprises metal oxide, glycerin, alkali metal hydroxide and water. When the electroplating additive disclosed by the invention is used in an electroplating mixed solution, the metal oxide can stably and reliably refine a coating crystal and improve a cathode polarization reaction, so that the hardness of a finally formed coating is increased. The alkali metal hydroxide can react with glycerol, and a product obtained by the reaction can be complexed with the metal oxide, so that the metal oxide cannot precipitate in the electroplating mixed solution, and later electroplating is facilitated. Furthermore, when the electroplating mixed solution is used for manufacturing a plated part, the metal oxide can be uniformly dispersed in a plating layer, so that the overall hardness of the plating layer is improved.

The invention relates to the technical field of titanium-steel composite plates, and particularly discloses a high-thermal-conductivity titanium-steel cold-rolled composite plate and a preparation method thereof.The preparation method comprises the steps that plasma etching treatment is conducted on a titanium plate, a TiB2-graphene heat conduction layer is arranged on the etched surface in a laser cladding mode, and an aluminum oxide whisker layer is deposited on a stainless steel plate through plasma electrolysis; the preparation method comprises the following steps: spraying nano-copper slurry on the surface of aluminum oxide whiskers, curing, carrying out composite rolling on a modified titanium plate and a stainless steel plate, and carrying out annealing and tempering treatment after rolling to obtain the high-thermal-conductivity titanium steel cold-rolled composite plate.

The invention discloses a preparation method and application of a nickel-doped graded nano array electro-catalysis material, and relates to the technical field of nano material preparation, the preparation method comprises the following steps: preparing a solution by taking foamy copper as a substrate material and sodium hydroxide and ammonium persulfate as raw materials; a copper hydroxide nanobelt array precursor is synthesized on a foamy copper substrate in an in-situ growth mode through chemical oxidation treatment, then the precursor is converted into a nickel-doped cuprous sulfide nanorod array through hydro-thermal treatment, uniform nanosheets are formed on nanorods through the electro-deposition process, and the nickel-doped graded nanorod array electro-catalysis material can be obtained. By optimizing the synthesis method and adjusting the doping proportion, the obtained graded nano array shows relatively low overpotential and excellent stability in an electro-catalytic reaction, and the problems of low catalytic efficiency, poor durability and the like and insufficient stability of an existing catalyst are solved.

The invention provides a cobalt-based catalyst, a preparation method thereof and application of the cobalt-based catalyst in electrolytic hydrogen production. Specifically, the cobalt-based catalyst mainly comprises a nano cobalt oxide and a nano cobalt hydroxide, and is prepared by taking KCo (III) EDTA as a precursor through an electrochemical deposition method. The preparation method of the cobalt-based catalyst comprises the following steps: firstly, dissolving KCo (III) EDTA (Ethylene Diamine Tetraacetic Acid) in an alkaline solution to form cobalt-containing alkaline liquor; performing electrochemical deposition, and performing in-situ deposition on the surface of the electrode to form a cobalt-based catalyst; the preparation method is simple, convenient, easy to control, good in reproducibility, capable of forming high binding force with an electrode without fixing of an additional binder, good in stability, not prone to falling off and beneficial to industrial application as a catalyst for hydrogen production through water electrolysis. The cobalt-based catalyst is applied to a water electrolysis hydrogen production catalyst, and the cobalt-based catalyst has an obvious oxygen evolution reaction as an anode catalyst.

The invention discloses a rare earth element doped stainless steel oxygen evolution electrode and a preparation method thereof, and belongs to the technical field of electrode preparation. The preparation method of the stainless steel oxygen evolution electrode comprises the steps that stainless steel with impurities removed serves as an anode and is placed in an alkaline solution with the concentration being 7-12 mol / L, cyclic voltammetry is adopted, stainless steel treated through cyclic voltammetry is obtained, and the potential window is-0.3 V to 1.5 V; the stainless steel is placed in an alkaline solution with the concentration being 1-2 mol / L and serves as an anode for electrolysis, and anodic oxidation stainless steel is obtained; the anodic oxidation stainless steel is placed in a cerium ion solution, a cyclic voltammetry method is adopted, the stainless steel serves as an anode to be treated, and a stainless steel oxygen evolution electrode is obtained through electro-deposition; wherein the potential window is-1.5 V to 1.0 V (+ / -0.5 V). The preparation method is simple, the cost is low, large-scale preparation is easy, long-time, high-temperature and other complex preparation processes are not needed, and when the electrode is used as an electrode for electrolyzing oxygen evolution in water, the electrode has excellent catalytic activity and shows huge application prospects in large-scale industrial hydrogen production through water electrolysis.

The invention discloses a high-temperature-corrosion-resistant stainless steel gas distribution disc and a preparation method thereof, and relates to the technical field of stainless steel machining, stainless steel is subjected to micro-arc oxidation treatment, the high temperature resistance and wear resistance of the surface of the stainless steel are improved, but the corrosion resistance of the stainless steel subjected to micropore treatment needs to be improved. Stainless steel subjected to micro-arc oxidation treatment is subjected to titanium dioxide layer plating treatment, micro-arc oxidation holes provide additional anchoring points, titanium dioxide layer plating treatment is carried out on the basis, the corrosion resistance of the stainless steel is improved, micro-arc oxidation treatment is firstly carried out on the surface of the stainless steel, then titanium dioxide is plated on the surface of the stainless steel, and the corrosion resistance of the stainless steel is improved. And the binding force between the titanium dioxide layer and the stainless steel substrate can be obviously improved. The graphene oxide-titanium dioxide composite sol is added into the electroplating solution, invasion of corrosive media is effectively blocked, the diffusion path of the corrosive media is prolonged through the graphene sheet layer, and the corrosion resistance of the stainless steel is further improved.

The invention provides a hydroxide-phosphide heterojunction oxygen evolution catalyst, a preparation method thereof and application of the hydroxide-phosphide heterojunction oxygen evolution catalyst in seawater electrolysis, and belongs to the field of seawater electrolysis. The invention aims to solve the problem of low catalytic efficiency caused by limitation of rapid transmission of electrons due to severe corrosion of electrolyzed seawater and weak conductivity during electrolysis. The method includes ultrasonically cleaning carrier materials; preparing a first precursor solution from ammonium salt, a phosphorus source and a metal source for preparing phosphide; depositing metal phosphide on the surface of the carrier through an electrochemical deposition method; preparing a second precursor solution from a metal source for preparing hydroxide; the preparation method comprises the following steps: growing layered metal hydroxide on the surface of metal phosphide through an electrochemical deposition method to obtain a metal hydroxide-phosphide heterojunction catalyst; and cleaning and drying to obtain the layered metal hydroxide / phosphide heterojunction oxygen evolution catalyst. The method is simple, efficient and low in cost, the more efficient oxygen evolution reaction catalyst can be prepared, and the good inhibition effect on the chlorine evolution reaction is achieved.

The invention relates to the technical field of electrocatalytic oxidation and water treatment, in particular to a preparation method and application of an electric anode film capable of efficiently breaking and degrading a metal organic complex. The titanium dioxide nanotube array with ordered height grows on the porous foam titanium substrate in situ, so that the specific surface area is increased, and the service life is prolonged; by doping Ti < 3 + >, the defect that a traditional titanium dioxide nano array tube is poor in conductivity is overcome; meanwhile, lead dioxide is loaded to improve oxygen evolution reaction (OER) potential, OH is efficiently generated, and pollutants are thoroughly mineralized; ferric oxide is further introduced as an active doping agent, so that the leaching of Pb < 2 + > can be improved. Continuous flow stable operation is realized by virtue of a porous film-shaped structure of a porous titanium substrate, the contact oxidation efficiency of pollutants on an anode film interface is increased, and the problem of limited mass transfer of the pollutants is solved; the electric anode film can realize complex breaking and degrading effects on a metal organic complex.

The invention discloses a Ce-doped CoP / NiCoP-coated NM self-supporting structure electrode and a preparation method and application thereof, the electrode takes a pretreated nickel net as a conductive substrate, a two-step method combining pulse electrodeposition and constant potential deposition is adopted, a compact NiCoP bottom layer and a Ce-doped CoP outer layer are constructed in sequence, and a CoP / NiCoP heterojunction structure with a three-dimensional coralline open morphology is formed. The method is mild in process, green, simple and convenient, and a traditional high-temperature phosphating step is abandoned. The prepared self-supporting electrode combines the charge regulation advantage of a heterojunction interface, the Ce-doped electronic structure optimization effect and the mass transfer advantage of a three-dimensional porous structure, so that the self-supporting electrode has extremely high hydrogen evolution catalytic activity, strong bonding force with a substrate and excellent long-period operation stability.

The invention discloses a self-supporting catalytic electrode for hydrogen production from alkaline electrolyzed water and a preparation method of the self-supporting catalytic electrode. The preparation method comprises the steps that an electroplating solution containing nickel salt, ferric salt and ammonium chloride is prepared, then in the electroplating solution, a conductive substrate serves as a cathode, metal nickel serves as an anode, an external power source is used for providing gradually-increased electroplating voltage, and electroplating is carried out in three stages; depositing a nickel-iron alloy conducting layer on the cathode in an electroplating voltage range of 0.5-1.0 V; the electroplating voltage is gradually increased to 1.0-1.4 V, and a transition layer in which the ferro-nickel alloy and LDH coexist continues to be deposited on the cathode; and the electroplating voltage is further increased to 1.4-1.8 V, and the LDH active layer continues to be deposited on the cathode. The conductive supporting layer and the high-activity catalytic layer are continuously deposited on the same substrate through the electroplating technology, integrated combination of conductivity and catalytic performance is achieved, and the defects that in a traditional catalytic electrode, the binding force between an active layer and a supporting body is weak, and stability is poor are overcome.

Provided is a surface-treated steel sheet that can be produced without the use of hexavalent chromium and that combines excellent film corrosion resistance, coating corrosion resistance, film wet adhesion, coating secondary adhesion, and weldability. At least one side of the surface-treated steel sheet includes a Ni-containing layer, a metallic Cr layer on the Ni-containing layer, and an oxidized Cr layer on the metallic Cr layer. The water contact angle is 50° or less, and the total atomic ratio to Cr of K, Na, Mg, and Ca adsorbed on the surface is 5.0% or less.

The invention discloses a super-hydrophobic self-repairing composite film for deicing fan blades and a preparation method of the super-hydrophobic self-repairing composite film. Isocyanate-based polyurethane and a hydroxyl-containing shape memory polymer are dissolved in cyclohexanone, and a mixed solution is obtained; spin-coating the mixed solution on the surface of glass fiber reinforced resin to form a substrate layer; uniformly mixing a microcapsule material and vinyl epoxy resin in methyl ethyl ketone, and spin-coating the mixture on the substrate layer to form a functional layer; and spraying the modified nano SiO2 particle suspension onto the functional layer to obtain the super-hydrophobic layer. The composite film has long-acting anti-icing performance, the self-repairing function of the composite film can cope with mechanical wear and environmental erosion, the shape memory polymer cooperates with pneumatic stripping of an ice layer through temperature triggering deformation, meanwhile, the nano structure enhances wear resistance and chemical inertness, and the composite film adapts to extreme environments such as low temperature and high humidity. The process is green and efficient, raw materials are easy to obtain, the operation and maintenance cost is remarkably reduced, and intelligent and sustainable anti-icing protection is provided for the fan blade.

A method of forming a lubricant coating, a method of coating a bearing surface with a lubricant coating, and a vehicle including a bearing including a lubricant coating. A substrate, such as a bearing, including a surface and an electrode are immersed in an electrolyte bath. The electrolyte bath includes an aqueous electrolyte solution including sodium metabisulfite (Na2S2O5), sodium molybdate (Na2MoO4·2H2O), a pH modifier, an anionic surfactant, and water. A first pulsed direct current is applied through the aqueous electrolyte solution using a direct current power supply and a molybdenum disulfide (MoS2) layer is formed on the surface of the substrate.

The invention discloses a method for recycling silicon industry by-product silicon tetrachloride based on gallium electrode electro-deposition, which is used for solving the problems of low solubility and crystal structure in the process of preparing silicon by an electro-deposition method. According to the method, a deep eutectic solvent system composed of 1, 3-dimethyl-2-imidazolinone and 1, 3-dimethylurea is adopted to efficiently absorb silicon tetrachloride in a green manner and prepare the electrolyte, and the electrolyte is converted into high-purity, uniform and compact silicon crystals by using a liquid gallium electrode electrodeposition technology, so that effective conversion from wastes to high-added-value materials is realized. Meanwhile, the low-toxicity eutectic solvent which is easy to prepare and has good biodegradability is adopted to replace traditional ionic liquid or other chemical reagents, so that the safety, the environmental protection property and the sustainability of the process are remarkably improved, and the treatment cost and the environmental burden are reduced at the same time.

The invention discloses a method for preparing an hBN ceramic coating on the surface of a SiCp / 2024Al substrate, and belongs to the technical field of surface treatment. The invention discloses a method for preparing an hBN ceramic coating on the surface of a SiCp / 2024Al substrate. The method comprises the steps that the SiCp / 2024Al substrate is polished and ground and then dried after being subjected to ultrasonic cleaning; adding sodium silicate, sodium hydroxide, the hexagonal boron nitride nano-powder and a surface active component into deionized water, and performing ultrasonic dispersion to obtain a composite electrolyte; placing the composite electrolyte in a stainless steel electrolytic bath, and connecting the stainless steel electrolytic bath to a power supply cathode of a plasma discharge system; the pretreated SiCp / 2024Al substrate is connected to the positive electrode of a power source of a plasma discharge system and immersed in the composite electrolyte; and the plasma discharge system operates, under the action of positive and negative pulses, the nano-particles are driven to migrate to the surface of the SiCp / 2024Al substrate and participate in reaction co-deposition, and the compact and uniform large-thickness high-electrical-insulation hBN ceramic coating grows on the surface of the substrate.

The present invention provides a carbon nanotube-porous copper composite current collector and a preparation method thereof and a silicon negative electrode, which belongs to the field of lithium battery negative electrodes. The composite current collector preparation method includes: using a mixed solution of hydrochloric acid and an aqueous hydrogen peroxide solution as an etching solution, immersion chemical etching of a copper foil, and obtaining a primary current collector; using a porous copper current collector as a cathode, and using a copper salt-carbon nanotube suspension as an electrolyte for electrodeposition, to obtain a carbon nanotube-porous copper composite current collector with a honeycomb dendrite structure. Silicon is then deposited on the composite current collector by chemical vapor deposition to obtain a silicon negative electrode. The porous copper / carbon nanotube current collector-based silicon negative electrode prepared by the present invention is a self-supporting structure, does not require a non-conductive adhesive, and the microscopic porous structure can well alleviate the volume expansion caused by the silicon material during the charge and discharge process, and has a binding effect on the silicon particles, effectively preventing the silicon material from falling off, and significantly improving the coulomb efficiency and cycle performance of the battery.

To provide an alloy member having both corrosion resistance and excellent appearance.SOLUTION: An alloy member 100 comprises a substrate 101 comprising magnesium as a main component and containing lithium, and a corrosion preventive film 102 containing magnesium, phosphorus, and fluorine, the corrosion preventive film 102 being disposed on the substrate 101. The average film thickness T of the corrosion preventive film 102 is 20 μm or more, and the difference between the maximum value and the minimum value of the film thickness of the corrosion preventive film 102 is less than 20 μm.SELECTED DRAWING: Figure 1

The invention relates to a method for preparing a diffusion bonding layer on a nickel-based alloy and YSZ ceramic coating interface, and belongs to the technical field of metal material surface protection and ceramic coatings. According to the preparation method, a YSZ composite ceramic coating is deposited on the surface of the nickel-based alloy by adopting an electrophoretic deposition method, and then an MCr2O5 (M is Zr, Y, Ce, Yb and Al) diffusion bonding layer is prepared on the interface of the nickel-based alloy and the YSZ composite ceramic coating by adopting a pressureless discharge sintering and thermal diffusion treatment method. The bonding layer prepared through the diffusion method is good in interface bonding, the thermal stress between the nickel-based alloy and the YSZ ceramic coating is effectively buffered, the defects that a bonding layer prepared through a traditional method is large in pore impurity amount and the like can be overcome, and the bonding force between the ceramic coating and a base body and the high-temperature anti-oxidation and anti-stripping performance are remarkably improved.

The invention belongs to the technical field of biomimetic materials, and discloses a titanium alloy implant surface biomimetic coating and a preparation method thereof.The biomimetic coating comprises a porous titanium support layer, a micron-sized porous titanium layer is prepared through plasma spraying, and then nano-hydroxyapatite is doped to improve osteoinductivity; the graphene enhancement layer is modified, a graphene oxide film is electrochemically deposited, the graphene oxide film and the titanium substrate are covalently bonded through a silane coupling agent, and strontium ions are loaded to promote osteogenic differentiation; an antibacterial active layer and in-situ reduced graphene oxide form a three-dimensional network conductive structure, tantalum-doped carbon nitride quantum dots are loaded through ultrasonic dispersion and embedded between graphene layers to form an antibacterial phase, and then magnesium silicate nanowires are subjected to hydrothermal growth to form a bioactive phase. Through triple bionic design of porous titanium, ion release / photo-thermal response and PDA adhesion, the bone bonding strength, antibacterial property, wear resistance and corrosion resistance of a coating interface are improved.

The invention provides a vanadium oxide modified bismuth tin alloy electrocatalyst and a preparation method and application thereof. The electrocatalyst is BiSn (VOx) and has a two-dimensional nanosheet morphology, the BiSn is an alloy, the VOx is modified on the surface of a BiSn nanosheet in a cluster form, and the lattice spacing of the BiSn (VOx) corresponds to the (012) plane of Bi. The BiSn (VOx) electrocatalyst with high selectivity and high activity is directly prepared through a one-step electrodeposition method, the electrocatalytic activity of a bismuth-based material is remarkably improved through vanadium oxide modification and tin alloying, the electrocatalyst can achieve formate Faraday efficiency exceeding 90% in a wide potential window, and the preparation method has the advantages that the preparation method is simple, the cost is low, and the application prospect is wide. And good stability is shown in a cycle test. In addition, the electrocatalyst shows excellent performance in a chargeable and dischargeable Zn-CO2 battery system and a co-electrolysis system.

The invention relates to the technical field of photoelectrocatalysis, and aims to provide a Ta3N5-based photoelectrode based on a vapor deposition technology and a preparation method of the Ta3N5-based photoelectrode. According to the photoelectrode, quartz glass serves as a substrate, and the substrate is provided with a multi-layer film structure which is formed on the basis of magnetron sputtering, electron beam evaporation, thermal nitriding treatment, electrochemical deposition and coating; the multilayer film structure sequentially comprises a first Ti metal layer, a Pt conductive metal layer, a Ti < x > Al < y > alloy layer, a Ta3N5 layer, a NiFeCoOz cocatalyst layer and MNPs nano metal particles from bottom to top. The use amount of precious metal can be greatly saved, the preparation cost is reduced, and the application range is expanded; the mobility of photoelectrons can be improved, the transport of photon-generated carriers can be improved, and the photoelectric utilization efficiency can be greatly improved; and the energy loss between two photo-thermal application interfaces is greatly reduced, so that the photo-thermal utilization efficiency of the single photoelectrode is improved.

The invention discloses a miniaturized low-profile flexible ocean galvanic couple type pH sensor and a preparation method thereof, and aims to solve the problems of large profile thickness and insufficient reliability of the conventional flexible pH sensor. A working electrode system and a reference electrode system in the miniaturized low-profile flexible ocean galvanic couple pH sensor are arranged on a flexible polyimide substrate, and the working electrode system comprises an iridium oxide working electrode, a first metal conduction circuit layer and a first metal bonding pad; the iridium oxide working electrode is connected with the first metal bonding pad through the first metal conduction circuit layer, the reference electrode system comprises a reference electrode, a second metal conduction circuit layer and a second metal bonding pad, and the reference electrode is connected with the second metal bonding pad through the second metal conduction circuit layer. The pH response performance is remarkably improved by utilizing the nanocrystalline iridium oxide sensing layer, the sensitivity reaches 72.76 mV / pH, and 16.84 s quick response is realized in a 3m / s high-flow-speed marine environment.

The invention relates to an auxiliary cathode design for preparing a uniform nickel-phosphorus alloy resistive film by electroplating, which aims at the edge polarization effect generated by electroplating the nickel-phosphorus alloy resistive film, changes the distribution of electric field lines by adding an auxiliary cathode, and improves the uniformity of a plating layer by adjusting the width of a copper sheet, the front-back distance and the like. And the edge polarization effect caused by electroplating can be effectively solved. The method is suitable for aerospace, electronic circuit and other industries.

The invention provides a one-dimensional nano material with wave-absorbing performance as well as a preparation method and application of the one-dimensional nano material. The preparation method comprises the following steps: (1) sequentially carrying out heavy ion beam irradiation, ultraviolet light sensitization and chemical etching on a high polymer material template to obtain an etched template; (2) spraying metal on one side of the etching template to form a gold layer; and (3) electrochemical deposition is conducted on the side, not sprayed with metal, of the etching template obtained in the step (2), deposition liquid adopted in the electrochemical deposition is an aqueous solution containing TiF4 and CoCl2, and therefore the Co / TiO2 composite nanowire is generated. Through the preparation method, the Co / TiO2 composite wave-absorbing material which is arranged in parallel, high in impedance matching capability and excellent in microwave absorption performance can be obtained.

The invention discloses a preparation method of a phosphate radical intercalation NiCoFe-LDH catalyst and application of the phosphate radical intercalation NiCoFe-LDH catalyst in hydrogen production through water electrolysis, and belongs to the technical field of hydrogen production through electrolysis. The method comprises the following steps: carrying out electrochemical adsorption and electrochemical oxidation treatment on a NiCoFe-LDH material in a phosphating solution, so as to obtain the phosphate radical intercalation NiCoFe-LDH catalyst. The phosphating solution is a sodium hypophosphite monohydrate solution. According to the preparation method, phosphate radicals are successfully introduced between LDH material layers in a manner of taking the phosphate radicals as a precursor for the first time and an electrochemical oxidation manner, so that the phosphate radical intercalation nickel-cobalt-iron-based hydrotalcite with a nanosheet structure is prepared; the material is stable in structure and low in overpotential in the water electrolysis hydrogen production process, stable operation can be conducted for 400 h when the current density is 400 mA. Cm <-2 >, and the potential retention rate reaches 95% or above; the preparation method is simple, the used reagents are low in cost and rich in source, and the catalyst is suitable for macroscopic preparation and has popularization and application prospects.