580results about "Electrolytic inorganic material coating" patented technology

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 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 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 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.

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.

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 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 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.

The invention discloses a 3D printing titanium alloy composite coating material and a preparation method and application thereof, and relates to the technical field of titanium alloy materials. The micro-arc oxidation ceramic coating is formed on the 3D printing titanium alloy matrix, and the Mn-MOF material grows in situ, so that the biocompatibility of the titanium alloy can be remarkably improved, the composite coating not only improves the surface roughness of the 3D printing titanium alloy matrix, but also effectively promotes cell proliferation and adhesion through introduction of Mn, and the surface roughness of the 3D printing titanium alloy matrix is improved. Therefore, the application potential of the titanium alloy in the biomedical field is improved.

According to the preparation method of the metal atom supported layered manganese oxide electrocatalyst, a precursor solution and foamed nickel are subjected to a hydrothermal reaction, cooling is performed to reach the room temperature after the reaction is finished, the foamed nickel after the reaction is dried, and the layered manganese oxide electrocatalyst is obtained. The layered manganese oxide electrocatalyst is placed in a metal salt electrolyte for electrochemical deposition so as to obtain the metal atom loaded layered manganese oxide electrocatalyst. According to the invention, heterogeneous atoms form metal load on the surface of manganese oxide so as to improve the electrocatalytic activity, selectivity and stability of the catalyst, which is an effective way. The metal load can further regulate and control the interlayer spacing and the electronic structure, more active sites are exposed, and the reaction kinetics can be optimized through bimetal coordination and electronic structure regulation and control; the metal atom doped needle-shaped manganese oxide electrocatalyst is prepared by combining a hydrothermal method with an electrodeposition method, and the preparation method is relatively simpler. In addition, the invention further provides the metal atom supported layered manganese oxide electrocatalyst and application.

The invention relates to a preparation method of a nickel-based heterojunction composite catalytic electrode for hydrogen evolution, and belongs to the technical field of electro-catalysis. According to the method, the CC / NiCo-NiCo (OH) 2 electrode is prepared by regulating the pH value of the electrolyte and utilizing a local alkalescence environment generated by one-step electrodeposition, and the CC / NiCo-NiCo (OH) 2 electrode has a unique structure that NiCo layered metal hydroxide wraps NiCo alloy and has relatively large specific surface area and charge transfer capacity; the CC / NiCo-NiCo (OH) 2 electrode is phosphatized to obtain the CC / NiCo-NiCoP electrode, so that the electronic structure of the material is optimized, more defects are introduced, active sites are increased, and the gas desorption performance is improved; the nickel-based heterojunction composite catalytic electrode CC / NiCo-NiCoP / NiOx for hydrogen evolution is obtained through secondary electro-deposition of the CC / NiCo-NiCoP electrode, the surface NiOx layer plays a role in protecting the CC / NiCo-NiCoP electrode, and the corrosion resistance and cycling stability of the catalyst are improved.

The present invention relates to a hot-dip galvanized steel sheet having excellent plating quality, a steel sheet for plating for manufacturing the same, and methods for manufacturing them. The hot stamping steel sheet according to one aspect of the present invention has a composition containing, by weight%, Mn: 0.1 to 4%, Si: 0.001 to 2%, C: 0.02 to 0.6%, Al: 0.001 to 1%, P: 0.05% or less, S: 0.02% or less, Cr: 1% or less, B: 0.01% or less, with the balance being Fe and inevitable impurities. The GDS profile of the Mn component and the GDS profile of the Si component observed in the depth direction from the surface each sequentially include a maximum point and a minimum point. The difference between the value obtained by dividing the Mn concentration at the maximum point of the GDS profile of the Mn component by the Mn concentration of the base material and the value obtained by dividing the Mn concentration at the minimum point of the GDS profile of the Mn component by the Mn concentration of the base material (converted Mn concentration difference) is 10% or more, and the difference between the value obtained by dividing the Si concentration at the maximum point of the GDS profile of the Si component by the Si concentration of the base material and the value obtained by dividing the Si concentration at the minimum point of the GDS profile of the Si component by the Si concentration of the base material (converted Si concentration difference) can be 10% or more. However, when no minimum point appears within a depth of 5 μm, the point at a depth of 5 μm is regarded as the point where the minimum point appears.

The invention discloses a preparation method and application of a bimetallic phosphate oxygen evolution electrode. The preparation method of the bimetallic phosphate oxygen evolution electrode comprises the following steps: cleaning a nickel substrate in an alkaline solution to remove oil, and cleaning the nickel substrate with pure water; soaking the cleaned nickel substrate in an acid solution, cleaning the nickel substrate with pure water, and placing the nickel substrate in the pure water for later use; the nickel substrate placed in the pure water serves as a cathode, two pure nickel materials are placed on the two sides of the nickel substrate to serve as two anodes, and electro-deposition is conducted on the nickel substrate in a bimetallic phosphate solution; and washing an electrode obtained after electrodeposition of the nickel substrate, and drying to obtain the bimetallic phosphate electrode. According to the preparation method, the adsorption free energy of a catalytic layer on the surface of the bimetallic phosphate oxygen evolution electrode on a reaction intermediate is optimized through the synergistic electronic effect of two metals, so that the intrinsic activity of oxygen evolution reaction is improved, meanwhile, a relatively stable catalytic layer structure is formed, and the stability of the bimetallic phosphate oxygen evolution electrode in the oxygen evolution process is improved.

The invention belongs to the technical field of chemical equipment, and discloses an electrolytic water membrane electrode and a preparation method thereof.The preparation method comprises the steps that a catalyst is electrically deposited on the surface of a substrate material, and a self-supporting electrode is obtained; preparing a first anionic membrane solution and a second anionic membrane solution by utilizing the functionalized polyaryl piperidine polymer and a polar solvent; and spraying the first anionic membrane solution on the surface of the self-supporting electrode, drying for the first time, smearing the second anionic membrane solution again by adopting the coating method, and drying for the second time to obtain the cathode side or anode side electrolytic water membrane electrode. Through an in-situ coating technology, the surface of the self-supporting electrode is directly covered with the anionic membrane solution, the surface microstructure of the self-supporting electrode is uneven, the anionic membrane solution can permeate into the pores, the anionic membrane and the electrode are tightly combined, ion transmission at the electrode / membrane interface is remarkably improved, and the self-supporting electrode is more stable in performance. Therefore, the electrolytic bath performance of the membrane electrode assembly under the condition that pure water serves as electrolyte is improved.

The invention discloses preparation and application of a nickel selenide / ferronickel phosphate crystal / amorphous heterogeneous catalyst, and relates to the technical field of electrochemistry. Selenizing the foamed nickel at low temperature in an inert atmosphere to generate a crystalline NiSex layer in situ; and by taking the obtained electrode as a working electrode, carrying out electrodeposition in a deposition solution containing nickel salt, ferric salt, hypophosphite and acetate by adopting a cyclic voltammetry method, so that amorphous NiFePOy is deposited on the surface of NiSex, and a NiSex / NiFePOy crystal / amorphous heterostructure nanosheet layer is constructed and is used for an alkaline medium urea oxidation reaction. The invention has the following beneficial effects: crystalline / amorphous interface coupling and a nanosheet self-supporting structure synergistically improve active sites and charge transfer capability, reduce energy consumption and improve current output; meanwhile, the electrode stability and durability are enhanced; the method has the advantages of low material cost, mild and simple process, suitableness for amplified preparation, and application potential of urea-assisted water electrolysis energy-saving hydrogen production.

Disclosed are novel electrolytes, and techniques for making and devices using such electrolytes, which are based on compressed gas solvents. Unlike conventional electrolytes, disclosed electrolytes are based on “compressed gas solvents” mixed with various salts, referred to as “compressed gas electrolytes.” Various embodiments of a compressed gas solvent include a material that is in a gas phase and has a vapor pressure above an atmospheric pressure at room temperature. The disclosed compressed gas electrolytes can have wide electrochemical potential windows, high conductivity, low temperature capability and / or high pressure solvent properties. Examples of a class of compressed gases that can be used as solvent for electrolytes include hydrofluorocarbons, in particular fluoromethane, difluoromethane, tetrafluoroethane, and pentafluoroethane. Also disclosed are battery and supercapacitor structures that use compressed gas solvent-based electrolytes and techniques for constructing such energy storage devices. Techniques for electroplating difficult-to-deposit materials using compressed gas electrolytes as an electroplating bath are also disclosed.

The invention discloses an electro-Fenton cathode and a preparation method and application thereof. The electro-Fenton cathode comprises a substrate electrode and a ligand-iron oxide interface loaded on the surface of the substrate electrode. According to the method, a ligand-iron oxide interface is constructed by a method of simply adding a low-dose complex, so that the problem that Fe circulation is blocked in a Fenton reaction under a neutral / alkaline condition is solved, and high-added-value oxidation of glycerol is simply and conveniently realized through effective electro-Fenton production of OH and keeping of medium concentration of strong oxidation free radicals; the two bottlenecks of'uncontrollable free radicals' and'easy inactivation of the Fe catalyst 'in the electro-Fenton technology are broken through, and accurate regulation and control of a reaction path are realized through coordination engineering.

The invention belongs to the technical field of biological implant materials, and discloses a medical titanium alloy implant surface modification method and application, and the medical titanium alloy implant surface modification method comprises the following steps: grinding and polishing a titanium alloy surface, and then carrying out ultrasonic cleaning and drying in ethanol; the titanium alloy is placed in multi-arc ion plating equipment, high-purity tantalum serves as a target material, and a tantalum coating is deposited on the surface of the titanium alloy; the surface of the titanium alloy is coated with photoresist, and then a micropore array is formed in the surface of the tantalum coating through the photoetching technology; the titanium alloy is placed in the electrolyte, a Ti plate serves as a cathode, a Ta plate serves as an anode, and hydroxyapatite is deposited in a porous structure through electrochemical deposition; and removing the photoresist to expose the tantalum coating, ultrasonically cleaning with deionized water, and drying. The titanium alloy implant provided by the invention has excellent corrosion resistance, biocompatibility and mechanical properties, and makes up for the deficiency of a single material, so that the titanium alloy implant subjected to surface modification has wider application.

The invention provides selenium nanoparticles as well as a preparation method and application thereof, and belongs to the technical field of selenium nanoparticles. Acetone ultrasonic cleaning and chemical polishing pretreatment are performed on a pure titanium substrate to obtain a clean surface, an anodic oxidation method is adopted to prepare a # imgabs0 # nanotube array carrier, and the nano-particles are prepared into selenium nano-particles. The method comprises the following steps: accurately depositing selenium nanoparticles on a carrier by using an electrochemical deposition method, realizing load control by combining an electrochemical kinetics principle, realizing uniform dispersion of the particles by matching an ultrasonic dispersion technology with a particle swarm optimization algorithm, and carrying out centrifugal separation and vacuum drying to obtain a spherical selenium nanoparticle product. And a multi-dimensional quality control detection system of a transmission electron microscope, an X-ray photoelectron spectroscopy and dynamic light scattering is established, so that the technical problems that the particle size distribution is non-uniform and the deposition load is difficult to accurately control in the preparation process of the selenium nanoparticles are solved.