75results about How to "Small Tafel slope" patented technology

The invention discloses a preparation method of an alpha phase cobaltous hydroxide nanosheet for an oxygen evolution reaction. A cobalt source compound and an alkaline reagent are dissolved into hydrophilic solutions, reflux condensation under microwave heating is carried out after even mixing, natural cooling to the room temperature is carried out, separation is carried out after centrifugal washing, and the alpha phase cobaltous hydroxide nanosheet is obtained after vacuum drying. According to a preparation method, the microwave heating reflux condensation manner is adopted, the preparation method is simple, easy to operate, low in cost and environment-friendly, no special equipment is needed in the overall reaction process, industrial production is facilitated, and finally the obtained product is higher in quality. The alpha phase cobaltous hydroxide nanosheet prepared through the method can have the beneficial effects of being high in material electrical conductivity, many in active site, high in electrocatalytic activity and the like. The material prepared through the method is an ideal oxygen evolution reaction catalytic material with wide commercialization application prospect.

The invention relates to a foamed nickel-based porous NiFe hydrotalcite nanosheet as well as preparation and application thereof. The invention discloses a preparation method of a foamed nickel-basedporous NiFe hydrotalcite nanosheet. The preparation method comprises the following steps that foamed nickel is immersed into a reaction solution, wherein the reaction solution comprises bivalent nickel salt, trivalent iron salt, urea, ammonium fluoride, hydrogen peroxide and water; then a reaction is conducted at the temperature of 100-120 DEG C under the closed condition, so that the foamed nickel-based porous NiFe hydrotalcite nanosheet is obtained after the reaction is completed.

The invention belongs to the field of new energy materials and electrochemical energy conversion devices, and particularly relates to ferrocobalt selenide and a preparation method and application thereof. Ferrocobalt selenide is prepared by means of a two-step hydrothermal method, firstly, a ferrocobalt basic carbonate precursor with a uniform and dense nanosheet shape is prepared by adopting a first-step hydrothermal reaction, and secondly, the precursor is selenized through second-step hydrothermal treatment on the premise of not damaging the uniform and dense nanosheet shape; the preparation method is simple, safe, efficient and controllable. When ferrocobalt selenide is used as an oxygen generating catalyst, since ferrocobalt selenide has a spinel structure, selenized ferrocobalt selenide is a thin nanosheet, more catalytic active sites are exposed, ferrocobalt selenide has high catalytic activity, the starting voltage of the catalyst is low, the overvoltage at a place of 10 mA m<2> is 217 millivolts, and ferrocobalt selenide has electrochemical properties such as lower Tafel slope and good catalytic stability.

The invention discloses a preparation method of a Fe-doped MoS2 nanomaterial. The preparation method comprises the following steps: dissolving trivalent Fe salt and ammonium tetrathiomolybdate into DMF, and reacting at 180 to 200 DEG C for 6 to 24 h to obtain the Fe-doped MoS2 nanomaterial. The invention also provides a nickel foam-loaded Fe-doped MoS2 nanomaterial which comprises a nickel foam substrate and a Fe-doped MoS2 nanomaterial loaded on the nickel foam substrate. In addition, the invention also provides the preparation method and application of the material. According to the preparation method of the Fe-doped MoS2 nanomaterial disclosed by the invention, a target product can be obtained by one step of solvent thermal reaction through simple operation; a surfactant for morphological control does not need to be introduced in the preparation process and the surface of the product is clean and easy to clean.

The invention discloses a preparation method and application of a VN@WN nanoparticle with an electrocatalysis function. The preparation method comprises the following steps: firstly, grinding a mixture of dicyandiamide, ammonium metavanadate and phosphotungstic acid, carrying out sieving with a 60-mesh sieve to obtain a mixture, putting the mixture into a porcelain boat, putting the porcelain boatinto a tubular atmosphere furnace, and respectively placing two furnace plugs at the two ends of a tube at an interval of 5 cm; introducing inert gas into the tubular atmosphere furnace to exhaust air in the tube, controlling the inner air pressure of the tube to be -1 MPa to 0 MPa, heating the tube to 700 DEG C to 900 DEG C at a heating rate of 10 DEG C / min, and maintaining the tube at the temperature for 120 min to 180 min; and carrying out cooling to obtain a sample and grinding the cooled sample in a mortar to obtain the VN@WN nanoparticle. The VN@WN nanoparticle with the electrocatalysisfunction prepared by using the preparation method is applied to the enhancement of hydrogen production activity. The VN@WN nanoparticle prepared by the method has an electrocatalytic function, can provide a clean and sustainable energy source for electrolysis of water, and is capable of eliminating the obstacle that a high-cost platinum-based material is widely applied to the industry. The electrocatalyst is simple in preparation process, good in hydrogen production performance and good in stability and circularity.

The invention discloses a method for synthesizing high-activity Ni-Mo-Co hydrogen evolution catalyst under the acid environment. The method comprises the following steps: (1) preparing catalyst electroplating liquid; (2) cleaning a substrate; (3) preparing template electrolyte; (4) manufacturing a template; (5) reprocessing the catalyst electroplating liquid; (6) depositing a catalyst. The methodhas the advantages of low cost, simpleness in operation and short period, and the prepared hydrogen evolution catalyst can remarkably reduce hydrogen evolution overpotential and can more remarkably reduce the hydrogen evolution overpotential under the acid environment.

The invention discloses an oxygen evolution electrocatalytic material, a preparation method and applications thereof, wherein the catalytic material contains an iron-nickel-chromium layered double hydroxide (FeNiCr-LDH) and a metal substrate, the FeNiCr-LDH vertically grows on the surface of the metal substrate in situ, and the metal substrate contains an iron element, a nickel element and a chromium element. According to the invention, a one-step hydrothermal synthesis method is adopted, a metal substrate is used as a semi-sacrificial template, ultrathin nano-sheet-like FeNiCr-LDH grows on the surface of the metal substrate in situ under the regulation and control of a 2,5-dihydroxy terephthalic acid ligand to obtain an electro-catalytic material, and the electro-catalytic material is directly used as a self-supporting electrode for an electro-catalytic oxygen evolution reaction; the prepared electro-catalytic material has excellent electro-catalytic activity and good electrochemicalstability; and the preparation process is simple and feasible, the cost is low, and the electro-catalytic material has a large-scale industrial application prospect.

The invention relates to a simple electro-deposition Co-Ce / NF electrode material and preparation and application thereof.The preparation method comprises the following steps: (1) dissolving a cobalt source, a cerium source and ammonium chloride in deionized water and mixing the components until the solution is clear, thereby preparing an electro-deposition solution; (2) in an electro-deposition device filled with the electro-deposition solution in the step (1), with foamed nickel as a working electrode for connection, a silver chloride electrode as a reference electrode and a platinum wire electrode as a counter electrode, preparing a Co-Ce / NF material through a one-step electro-deposition method; and (3) washing and drying the obtained Co-Ce / NF material to obtain the target product Co-Ce / NF electrode material. Compared with the prior art, according to the Co-Ce / NF electrode material synthesized by the invention, rare earth elements cerium and cobalt form an alloy to generate a synergistic effect; the electrochemical performance of the cobalt alloy is improved by using the activity of rare earth elements, the surface area of the material is increased by using foamed nickel as a carrier, and in addition, the synthesis method is simple, convenient, low in energy consumption and excellent in electrochemical performance and is expected to be applied to industrial large-scale production.

The invention provides a hydrogen evolution electrocatalytic material as well as a preparation method and application thereof. The hydrogen evolution electrocatalytic material contains ultrafine ruthenium nanoparticles with the metal loading capacity of 0.05-5wt% and a nitrogen-doped carbon skeleton with the nitrogen doping capacity of 1.0-10.0 at%, wherein the ultrafine ruthenium nanoparticles are uniformly loaded in the nitrogen-doped carbon skeleton, and the nitrogen-doped carbon skeleton contains a nitrogen element, a carbon element and an oxygen element. The hydrogen evolution electrocatalytic material provided by the invention can catalyze water electrolysis hydrogen evolution reaction, and can ensure the stability of the catalyst material while realizing efficient electrocatalytic hydrogen evolution.

The invention provides a zinc oxide-based carbon dioxide reduction electrocatalyst and a preparation method thereof. The catalyst is prepared from a chemical composition, i.e., ZnO, and is a dandelion-shaped particle with the particle size being 2.0 to 3.4mu m, wherein the hexagonal-prism ZnO forming the dandelion-shaped particle has the diameter being 60 to 90nm and the length being 1.0 to 1.7mum. According to the zinc oxide-based carbon dioxide reduction electrocatalyst and the preparation method thereof provided by the invention, the dandelion-shaped nano-zinc oxide is prepared through a liquid phase precipitation method. The invention has the advantages that the novel zinc oxide-based carbon dioxide reduction electrocatalyst with the characteristics of low initial potential, small tafel slope, favorable stability, higher selectivity and the like is provided, and meanwhile, the preparation method provided by the invention is simple in preparation process and low in cost.

The invention provides an iron-nitrogen co-doped carbon and MXene compound as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing an iron-doped imidazolinate framework; preparing Fe-N-C; mixing Fe-N-C and Ti3C2Tx, dispersing the mixture into N,N-dimethylformamide, and carrying out ultrasonic treatment; carrying out suction filtration, washing and drying, heating to 300 DEG C and 400 DEG C in a nitrogen atmosphere, and carrying out heat preservation for 0.5 hour to 2 hours so as to obtain the iron-nitrogen co-doped carbon and MXene compound FeNC@Ti3C2Tx. The iron-nitrogen co-doped carbon and MXene compound prepared by the preparation method can effectively catalyze an oxygen reduction reaction.

The invention discloses an iron-group carbide nano crystal-graphene nanoribbon composite material as well as preparation and application thereof, and belongs to the technical field of carbon nano materials. Graphene nanoribbon arrays are vertically grown on silicon wafers, iron-group carbide nano crystal is arranged at the top ends of the graphene nanoribbon arrays, and the iron-group carbide nano crystal is one of Fe3C, Co3C and Ni3C. The preparation comprises the following steps: firstly, vertically growing the graphene nanoribbon arrays on the silicon wafers, subsequently, evaporating iron-group elements at the top ends of the graphene nanoribbon arrays, and finally producing the iron-group carbide nano crystal. The iron-group carbide nano crystal-graphene nanoribbon composite material disclosed by the invention can be used in hydrogen evolution catalysis and oxidation reduction catalysis after the silicon wafers at the bottom are removed.

The invention discloses a method for preparing molybdenum disulfide nanosheets with atomic layer steps, which is characterized by comprising the following steps: pretreating raw materials; centrifugally cleaning; preparing a dispersion solution; dispersing a sample; performing pulse laser processing; and performing centrifugal cleaning and separation. The invention further discloses the molybdenumdisulfide nanosheets with the atomic layer step. The molybdenum disulfide nanosheet is prepared through the method.

The invention relates to a defect-rich Fe2O3-FeF2 nano porous film, a preparation method and application thereof, and aims to solve the technical problems of complex preparation process, high reactiontemperature, long preparation cycle and high cost in existing hydrogen and oxygen evolution bifunctional electrocatalysts. The technical scheme adopted by the invention includes: firstly conducting anodic oxidation treatment on an ordinary iron foil, then using NH4F as the fluorine source, in an argon atmosphere, carrying out fluorination reaction on the iron foil subjected to anodic oxidation treatment by chemical vapor deposition (CVD) method, and performing natural cooling to room temperature, thus obtaining the Fe2O3-FeF2 nano porous film. According to the invention, the preparation process is simple, only needs anodic oxidation equipment and a CVD furnace, and can complete preparation of the Fe2O3-FeF2 composite nano porous film without special atmosphere and pressure environment, and the obtained Fe2O3-FeF2 nano porous film contains FeF2 and Fe2O3 phases, is rich in defects, and has the advantages of high electrocatalytic hydrogen and oxygen evolution activity, low initial potential, large electric current density, stable performance and the like.

The invention relates to an oxygen evolution reaction FeOOH / Co(OH)2 composite electrocatalyst preparation method. The method adopts cobalt nitrate and ferric nitrate as raw materials to prepare a deposition electrolyte. Constant voltage potential layered deposition is used, and the deposition principle is that cathodic reduction of nitrate to a hydroxide ion is carried out, hydroxide precipitationis formed with a transition metal ion on the surface of a substrate, L-alanine is added to a nitrate electrolyte, and the electrostatic interaction between amphoteric terminal groups and anions and cations in a transition metal salt solution can effectively form nanoparticle growth on substrate carbon fibers during the electrodeposition process. The FeOOH / Co(OH)2 composite electrocatalyst prepared by the invention has high electrocatalytic performance and electrochemical stability, and can be used as an electrocatalytic material in an oxygen evolution reaction in the fields such as development of metal-air cells and clean energy.

The invention belongs to the field of electrolytic water catalysts, and particularly discloses a preparation method of a hollow iron selenium derivative catalyst and a product and application thereof,wherein the preparation method comprises the following steps: (1) carrying out hydrothermal reaction on a conductive substrate together with a mixed aqueous solution of soluble ferrous salt, seleniumpowder, a reducing agent and an alkaline solution to obtain an iron diselenide precursor; (2) placing a conductive substrate on which the iron diselenide precursor is grown in an alkaline solution asa working electrode, inserting a reference electrode and a counter electrode, electrifying and performing CV scanning to obtain a hollow iron oxide compound on the conductive substrate, wherein the scanning cycle times are not less than 20 times. The method comprises the following steps: firstly, obtaining an iron selenium compound with a hollowed-out shape through hydrothermal reaction; and secondly, electrochemically activating the iron selenium compound to finally obtain an iron oxide compound product. Compared with the prior art, the method can effectively solve the technical problems that commercial noble metal oxygen evolution catalysts are inferior in price and have unsatisfactory electrocatalytic characteristics such as catalytic activity, stability and the like.

The invention discloses a tantalum nitride carbon nano-film integrated electrode with cobalt nano-particles growing in a confinement manner, and a preparation method and an application thereof. The preparation method comprises the following steps: synthesizing a tantalum oxide nano-film taken as a carrier, loading a Co(tzbc)2(H2O)4 complex on the carrier through a hydrothermal technology, carryingout a nitridation reaction on the synthesized composite material through a chemical vapor deposition (CVD) technology, and naturally cooling the obtained reaction product to room temperature to prepare the tantalum nitride carbon nano-film integrated electrode with cobalt nano-particles growing in the confinement manner. The preparation process is simple, and the preparation of the tantalum nitride carbon nano-film integrated electrode with cobalt nano-particles growing in the confinement manner can be completed through a CVD furnace without a special pressure environment. The prepared tantalum nitride carbon nano-film integrated electrode with cobalt nano-particles growing in the confinement manner has electro-catalytic hydrogen evolution and oxygen evolution properties at the same time.

The invention discloses nanometer ditungsten carbide particles, and a preparation method and applications thereof. The preparation method comprises following steps: tungsten trioxide powder and urea are ground in a mortar according to a certain mass ratio and are uniformly mixed, and then an obtained mixture is transferred into a crucible; and the nanometer ditungsten carbide particles are prepared, wherein carrying out heat treatment on a uniformly mixed powder in an inert atmosphere to obtain W2C nano particles. The method is simple in process, easy to control and capable of saving energy, the obtained nanometer ditungsten carbide particles are uniform, the crystallinity degree is high, no other impure phase is generated, and the method is suitable for large-scale production and has goodelectrochemical performance.

The invention provides a molybdenum carbide nanorod for a catalyst and a preparation method and application of the molybdenum carbide nanorod. The preparation method disclosed by the invention comprises the following steps of: dispersing molybdenum trioxide and hypoxanthine in deionized water to obtain a dispersion liquid, carrying out a hydrothermal reaction on the obtained dispersion liquid, naturally cooling the obtained dispersion liquid to room temperature after the reaction is finished, successively conducting centrifuging, washing and drying to obtain a precursor nanorod, calcining theprecursor nanorod under inert gas, and conducting natural cooling to room temperature to obtain the molybdenum carbide nanorod. The molybdenum carbide nanorod prepared by the invention shows excellenthydrogen evolution reaction catalytic performance in an alkaline medium, and has relatively small overpotential and Tafel slope. The method has the advantages of simple preparation process, low cost,no use of reagents with strong toxicity and great harm to the environment, no pollution to the environment, greenness, environmental protection, suitableness for industrial production, and very goodlarge-scale commercial preparation and application prospect.

The invention provides a preparation method of an iron-based MOFs oxygen evolution electrocatalyst with a high-activity crystal face proportion, and the catalyst, and belongs to the technical field of oxygen evolution electrocatalysts. The method comprises the following steps: weighing ferric salt and an organic ligand fumaric acid according to the molar ratio of iron ions to fumaric acid of 1: (64-128), dissolving the ferric salt and the organic ligand fumaric acid in an N, N-dimethylformamide solvent, and uniformly stirring to obtain a mixed solution; carrying out solvothermal reaction on the obtained mixed solution at a certain reaction temperature for a period of time, and naturally cooling to room temperature; and washing the obtained product with absolute ethyl alcohol, and then drying and collecting to obtain the product which is the iron-based MOFs oxygen evolution electrocatalyst. The iron-based MOFs electrocatalyst with the high active crystal face exposure proportion can be synthesized in situ by regulating and controlling the proportion of the metal Fe ions and the organic ligand fumaric acid and using a mild solvothermal method, the preparation method is mild, simple and easy to operate, and the purpose of regulating and controlling the crystal face can be achieved without additionally introducing a surfactant.

The invention discloses a preparation method of a molybdenum selenide-acetylene black composite material and an application of the molybdenum selenide-acetylene black composite material as a catalyst in a hydrogen evolution reaction. The preparation method comprises the steps that firstly, selenium powder and sodium molybdate are dissolved in distilled water and stirred and dissolved sufficiently, and a solution (1) is formed; hydrazine hydrate is added dropwise to the solution (1) and stirred and mixed uniformly, and a solution (2) is obtained; acetylene black is subjected to acidizing treatment and then ultrasonically dispersed in distilled water, and a homogenous solution (3) is obtained; the solution (3) is added dropwise to the solution (2) and mixed uniformly, and a mixed solution (4) is obtained; pH of the mixed solution (4) is regulated to 12.0-12.5, and a solution (5) is obtained; treated nickel foam sheets are soaked in the solution (5) and then transferred to a reaction kettle for the reaction; the temperature is reduced to room temperature after the reaction, a product is subjected to centrifugation, washing, drying and stripping, and the molybdenum selenide-acetylene black composite material is obtained. When the prepared molybdenum selenide-acetylene black composite material is taken as the catalyst in the hydrogen evolution reaction, the hydrogen evolution overpotential is low, and the Tafel slope is small.

The invention provides a preparation method of a VN@Co electrocatalyst. The preparation method includes the steps of: (1) proportioning urea, ammonium metavanadate, cobalt chloride hexahydrate and sodium hypophosphite in mass ratio to obtain raw materials; 2) grinding the raw materials, and then putting the ground raw materials into a tubular atmosphere furnace; 3) heating the tubular atmosphere furnace in an inert atmosphere and performing heat preservation; and 4) grinding the reaction product to obtain the VN@Co electrocatalyst. The method provided by the invention has simple process, the obtained VN@Co electrocatalyst has the characteristics of excellent electrocatalytic activity, little additional energy consumption during electrolysis, long service life, and high electrocatalytic activity.

The invention discloses a ternary layered carbide Mo2Ga2C composite flower-like MoS2 nano-particle composite material and a preparation method and application thereof. According to the composite material, flower-like MoS2 nanoparticles are used as compounds, ternary layered carbide Mo2Ga2C is used as a carrying substrate material, the ternary layered carbide Mo2Ga2C has a length of about 5 [mu]m and a width of about 3 [mu]m, and is a hexagonal crystal phase layered skeleton material, two Ga layers are stacked between Mo2C layers in a simple hexagonal arrangement, the closely packed Mo atoms are interleaved with the double layers of Ga to form a Mo-Mo-Ga-Ga-Mo-Mo layer, the two Ga layers lie exactly on tops without being closely packed, the carbon atoms occupy octahedral position points among the Mo atoms, and the flower-like MoS2 nanoparticles are uniformly distributed on the surface of the layered Mo2Ga2C to form a stable carrying structure. The invention further discloses a preparation method of the composite material. The preparation method is low in cost, simple in preparation condition and high in repeatability. The invention also provides an application of the nano material as a water splitting catalytic electrode, and the electrode material has the advantages of high conductivity, strong cycling stability and the like.

The intention relates to a Co@ FePx-NCs material for alkaline solution hydrogen evolution and a preparation method and application thereof. The method comprises the steps that firstly, ferric chloride, sodium hypophosphite, dicyandiamide and ethyl alcohol are mixed and prepared into a solution, then a cobalt source is added into the solution and mixed evenly, and a mixed solution is obtained; by heating and evaporating the mixed solution to dryness, a CoPx / FePx-C2N4H4 mixture is obtained, finally by soaking the CoPx / FePx-C2N4H4 mixture in a phosphoric acid solution for etching, and sequentially filtering, drying and calcining, the Co@ FePx-NCs hydrogen evolution material is obtained. The Co@ FePx-NCs material can be used for electrocatalytic hydrogen evolution reaction. Compared with the prior art, the preparation method is simple, the raw material cost is low, the earth reserve of main elements is sufficient, the electrochemical performance of the electrode material is improved through the composite effect of two transition metals, and the Co@ FePx-NCs material has a wide industrial application prospect.

The invention belongs to the technical field of air batteries, and particularly relates to a flexible neutral zinc air battery and a preparation method thereof. The preparation method comprises the following steps of (1) pyrolyzing a cobalt metal organic framework material coated zinc metal organic framework material ZIF8@ZIF67, and doping nonmetal atoms to obtain nonmetal atom doped porous nitrogen carbon, adding inorganic salt into the polymer aqueous solution, uniformly mixing, and condensing to obtain a solid electrolyte, and (2) assembling the flexible neutral zinc-air battery by taking metal zinc as a negative electrode, the non-metal atom-doped porous nitrogen carbon as a positive electrode and the solid electrolyte as an electrolyte. The porous carbon composite material can be obtained by pyrolyzing and doping the ZIF8@ZIF67 material with the core-shell structure, and the porous carbon composite material has a unique electronic structure and components, so that the porous carbon composite material has higher oxygen reduction and oxygen evolution catalytic activity and excellent stability in a neutral environment.

The invention provides a FeCu-N-HC nanosphere catalyst and a preparation method thereof, and belongs to the field of air battery catalytic materials. The preparation method comprises: firstly formingFeCu-N coordination, physically mixing NaCl and SiO2 nanosphere templates, then preparing the FeCu-N6-containing hollow carbon nanospheres through carbonization, and the BET specific surface area being 610 m<2> g<-1>. Due to the fact that the Fe-Cu synergistic coordination ligand is formed firstly, when oxygen reduction catalysis is conducted on the finally-prepared FeCu-N6, the catalysis steps can be effectively shortened, and the catalysis rate of active sites is increased. The FeCu-N-HC hollow carbon nanosphere prepared by the method is used as an oxygen reduction catalyst, and the catalytic performance and the stability of the FeCu-N-HC hollow carbon nanosphere are superior to those of a current commercial 20% Pt / C catalyst.

A preparation method for high catalytic activity electrocatalyst 1T' phase tungsten sulfide. Ammonium tungstate and thiourea are dissolved in a high boiling point solvent, heated to 100-120°C under the protection of inert gas, and then heated at 280-320°C. After the reaction, naturally cool to room temperature, add ethanol, filter to obtain a filter cake, wash and dry the filter cake to obtain a high catalytic activity electrocatalyst 1T' phase tungsten sulfide. In the present invention, ammonium tungstate and thiourea are dissolved in a high-boiling solvent and subjected to heat treatment to obtain metal 1T' phase WS with uniform size distribution. 2 Nanoparticle self-assembly. 1T’ phase WS prepared by the present invention 2 The products all have the advantages of high crystallinity, uniform morphology and size, no agglomeration, and good dispersion in non-polar solvents. Since 1T’ phase WS 2 It has higher conductivity and more catalytically active sites, allowing it to exhibit excellent hydrogen evolution reaction activity as an electrocatalyst.

The invention relates to a composite carbon-base [Mo3S13]<2-> electrochemical hydrogen evolution catalyst and a preparation method thereof. The catalyst contains reduced graphene oxide carbon nano-tube aerogel and [Mo3S13]<2->, wherein [Mo3S13]<2-> is loaded on pores and surface of a net structure of the reduced graphene oxide carbon nano-tube aerogel, and the mass ratio of [Mo3S13]<2-> to the reduced graphene oxide carbon nano-tube aerogel is (1-10) to 2. By loading the reduced graphene oxide carbon nano-tube aerogel with [Mo3S13]<2->, more active sulfur atoms can be exposed, the dispersity of active substances can be further improved, and the electron transfer rate can be increased, so that the catalyst can integrally present excellent electrochemical hydrogen evolution properties such as relatively low hydrogen evolution overpotential (-.-0.12V), relatively small Tafel slope (-62mV / dec) and relatively small electrochemical impedance (-7ohm); and after 1000 cyclic voltammetry scanning, a polarization curve becomes very small, and the relatively stability is presented.

The invention discloses a preparation method and application of an iron-nickel-doped tantalum nitride carbon nano-film integrated electrode. The method comprises the following steps: synthesizing a tantalum oxide nano-film, taking the tantalum oxide nano-film as a carrier, loading ferric hydroxide and nickel hydroxide through a hydrothermal method, carrying out a nitridation reaction on the synthesized composite material through a chemical vapor deposition (CVD) method, and naturally cooling to room temperature to prepare the iron-nickel-doped tantalum nitride carbon nano-film integrated electrode. The preparation process is simple, and the preparation of the iron-nickel-doped tantalum nitride carbon nano-film integrated electrode can be completed through a CVD furnace without a special pressure environment. The prepared iron-nickel-doped tantalum nitride carbon nano-film integrated electrode has electro-catalytic hydrogen evolution and oxygen evolution performances at the same time.

The invention discloses a method for preparing IrO 2 The @Ir core-shell structure electrocatalyzed oxygen evolution reaction catalyst method includes the following steps: material pretreatment; weighing and dispersion; laser treatment; annealing. The invention also discloses a kind of IrO 2 The @Ir core-shell structure electrocatalytic oxygen evolution reaction catalyst is prepared by the above method.