38results about How to "Excellent oxygen evolution catalytic performance" patented technology

The invention discloses a sulphur vacancy richened Ni3S2 nanorod oxygen evolution electro-catalysis material and a preparing method and application thereof, and belongs to the field of electrolytic water catalysis. The preparing method comprises three steps that firstly, a precursor film layer is prepared through anodic oxidation treatment of a nickel sheet; secondly, the precursor film layer is subjected to annealing treatment to obtain oxygen vacancy richened NiO film layer; and finally, the film layer obtained after annealing is subjected to hydrothermal sulfidizing to obtain the sulphur vacancy richened Ni3S2 nanorod oxygen evolution electro-catalysis material. As the existence of the sulphur vacancy, energy barriers needing to be overcome by a midbody on adsorption or desorption on the catalyst surface are reduced, and the oxygen evolution catalytic performance is greatly improved. Sulphur vacancy richened Ni3S2 nanorods grow on a nickel substrate in situ, the resistance between acatalyst and the substrate is reduced, and meanwhile, the oxygen evolution catalyzing stability is improved. The method is simple in operation, the requirement for preparing equipment is low, the material is environment-friendly, the preparing method has generalizability, and the development and application of the transition metal sulfide catalyst are further promoted.

The invention relates to a light composite electro-catalysis energy-saving anode for non-ferrous metal electro-deposition, which is composed of a metal substrate, an interlayer and a composite electro-catalysis superficial layer in sequence from inside to outside, wherein the metal substrate is Al or Al base alloy (Al-M1), the interlayer is a composite layer Al2O3-(Pb-M2) composed of Al2O3 or Pb base alloy, and the composite electro-catalysis superficial layer is a composite deposite (Pb-M2)-M3Ox composed of Pb or Pb base alloy and oxide catalyst or a composite deposite PbO2-M3Ox composed of PbO2 and oxide catalyst. The preparation method of the anode comprises the following steps: preparation of the metal substrate: carrying out anodic oxidation on the metal substrate surface and prefabricating a multihole Al2O3 layer; then performing an electro-deposition Pb or Pb base alloy layer on the multihole Al2O3 layer; and plating a (Pb-M2)-M3Ox or PbO2-M3Ox composite superficial layer on the surface of the Pb or Pb base alloy layer. The anode prepared by the invention can effectively reduce production energy consumption, improve cathode product quality, lower labor intensity, is suitable for industrialized production and can replace the Pb base alloy anode applied in the existing industry.

The invention relates to a FeNiCo oxygenated chemical nanosheet with adjustable metal proportion as well as a preparation method and application thereof. The preparation method comprises the followingsteps that S1, a metal organic framework ZIF-67 is prepared by adopting a normal-temperature standing precipitation method; S2, FeSO4*7H2O and NiSO4*6H2O are weighed according to a certain ratio andare fully dissolved in deionized water so as to obtain liquid A, and a proper amount of metal organic framework ZIF-67 powder obtained in the step S1 is taken and and is fully dispersed in absolute ethyl alcohol so as to obtain liquid B; S3, the liquid B is rapidly poured into the liquid A, and stirring is carried out; and S4, a product obtained in the step S3 is washed, and a centrifuged productis subjected to freeze drying so as to obtain the FeNiCo oxygenated chemical nanosheet with uniform morphology. The FeNiCo oxygenated chemical nanosheet as well as the preparation method and application thereof have the beneficial effects that the FeNiCo oxygenated chemical nanosheet serves as an anode for electrocatalytic water decomposition, and the oxygen evolution catalytic performance is excellent; and the material is simple in synthetic process, low in cost, environmentally-friendly and extremely high in repeatability.

The invention discloses a preparation method for an oxygen evolution electrode based on graphene oxide reduction. The method comprises the following steps: 1) oxidizing graphite power to prepare graphite oxide; 2) carrying out ultrasonic treatment on the graphite oxide prepared in the step 1) to prepare graphene oxide; 3) adding water to dilute the graphite oxide prepared in the step 2); 4) carrying out a hydrothermal reduction reaction on the diluted graphite oxide solution obtained in the step 3), thus obtaining a product, namely the oxygen evolution electrode based on graphene oxide reduction. The oxygen evolution electrode based on graphene oxide reduction prepared in the invention has excellent oxygen evolution catalytic performance and long-term stability, can replace expensive iridium and oxide electrode thereof, can be widely applied to the field of water and metal-air photolysis batteries and other energy conversion devices and the like, and has relatively high practical value. The common graphite power is adopted as a raw material in the invention, the raw material source is wide, the price is low, and the preparation method is simple and is suitable for large-scale production.

The invention relates to a preparation method and application of NiFe-LDH oxygen evolution electrocatalytic material rich in cation vacancy. The preparation method includes the steps of (1) soaking Ni-Fe alloy matrix in electrolyte which contains, by weight, 1-3% of NaF, 4-7% of (NH4)2MoO4, 15-25% of H2O, 25-40% of glycerol and 25-55% of phosphoric acid; (2) subjecting the Ni-Fe alloy matrix soaked in the electrolyte to anodizing to obtain NiFeMo anodized film; (3) subjecting a sample treated in step (2) to alkaline liquid etching, washing, and drying to obtain the NiFe-LDH oxygen evolution electrocatalytic material. The NiFe-LDH oxygen evolution electrocatalytic material prepared herein has high catalytic activity and good electrochemical stability; the preparation method is simple, efficient and low in cost, is well popularizable and helps further promote the development and application of LDH catalysts.

The invention relates to an iron-based inert anode with a lithium ferrite protective film and a preparation method and application of the iron-based inert anode. The inner layer of the iron-based inert anode is pure iron or an iron-based alloy, the outer layer of the iron-based inert anode is a lithium ferrite oxide layer, and the pure iron or the iron-based alloy undergoes electrochemical anodicoxidation in lithium-containing molten carbonate to obtain the iron-based inert anode. The iron-based inert anode has good electronic conductivity, excellent oxygen evolution catalytic performance, high stability and good thermal shock resistance; and the iron-based inert anode is low in cost and easy to process and can be used as a stable oxygen evolution inert anode in a high-temperature moltensalt electrolysis system taking carbonate as a main component.

The invention discloses a preparation method of a foamed nickel in-situ-supported SnO2 nanoparticles doped graphite carbon composite material and an application of electrolyzing water to separate oxygen on the basis of the composite material, as a catalyst, and belongs to the technical fields of nano-materials, nano-catalysis, and metal-organic framework materials. The method includes: performingelectro-deposition to foamed nickel in a terephthalic acid and Fe (III) solution containing tin powder, and annealing a produced composite material in air atmosphere at 300 DEG C. The catalyst is lowin raw material cost and simple in preparation method, is low in reaction energy consumption and has industrial application prospect. The catalyst is used for high-effectively catalytically electrolyzing water to separate oxygen and shows excellent oxygen separation electric-catalytic activity and electrochemical stability.

The invention provides a high-performance non-noble metal oxygen evolution catalyst and a preparation method and application thereof. The high-performance non-noble metal oxygen evolution catalyst is core-shell structural nanoparticles of nickel borate-covered nickel boride, wherein a core layer is of nickel boride nanoparticles, and a shell layer is of nickel borate. A nickel salt is reduced in alkaline solution with a borohydride to obtain a precursor, and the precursor is thermally treated to obtain the non-noble metal oxygen evolution catalyst. Application of the non-noble metal oxygen evolution catalyst as anodic oxygen evolution reaction catalyst in water electrolysis equipment is also claimed in the invention. The catalyst prepared herein has excellent catalytic performance and is higher in oxygen evolution activity than other traditional non-noble metal catalysts from literature reports. The preparation method of the invention is simple, economic, convenient to perform, and easy for large-scale production, and has huge potential application value in various industrial catalyst or other fields of science.

Belonging to the technical field of electro-catalytic material synthesis, the invention discloses preparation and application of a heteroatom nitrogen surface modified MoS2 nano-material. The preparedcatalyst has excellent electrocatalytic oxygen evolution performance. The preparation process comprises the steps of: (1) carrying out ultrasonic treatment on carbon cloth (3*3cm) in acetone, ethanoland water respectively for 10min; (2) mixing ammonium molybdate and thiourea uniformly in proportion in water, carrying out high-temperature reaction with clean carbon cloth in a reaction kettle, then performing cooling to room temperature, washing the carbon cloth with ethanol and water in sequence, and performing drying; and (3) putting the MoS2 nanosheet obtained in step (2) and ammonia waterinto a reaction kettle, and carrying out high-temperature reaction for a certain period of time to obtain the heteroatom nitrogen modified MoS2 nano-material. The catalyst obtained by the invention shows excellent electrocatalytic performance, and the preparation process is simple and low in cost, and is suitable for large-scale production.

The invention discloses a preparation method of an MOF catalyst with gluconic acid enhanced catalytic activity and application of oxygen evolution in electrolysed water based on the catalyst and belongs to the technical field of nano catalysis, nano materials and metal organic framework materials. The preparation method comprises the main steps: blending a trimesic acid solution and a nickel nitrate solution under room temperature, adding a prepared gluconic acid solution, utilizing a mixed solution as electrolyte to be deposited on foamed nickel and activating to obtain a nickel gluconate-trimesic nickel composite catalyst, namely the MOF catalyst with the gluconic acid enhanced catalytic activity. The catalyst has the advantages of low preparation raw material cost, simple preparation technology, low reaction energy consumption and industrial application prospect. The catalyst can be applied to efficiently catalyzing oxygen evolution of electrolysed water and has good oxygen evolution electrocatalytic activity and electrochemical stability.

The invention relates to a nanoporous Fe-based amorphous alloy and its preparation method and its application on an oxygen evolution catalytic electrode, specifically: using Fe-based amorphous / nanocrystalline alloy as a precursor, according to the characteristics of an amorphous phase and a nanocrystalline phase Different corrosion resistance, nanoporous Fe-based amorphous alloys prepared by selective etching of nanocrystalline phases. The prepared nanoporous Fe-based amorphous structure is stable, the specific surface area is large, and the composition and morphology can be adjusted. Oxygen catalytic activity, can be widely used in electrolysis of water oxygen evolution electrode and other fields. The preparation method of the invention is simple and has wide applicability.

The invention discloses a method for preparing a bifunctional ternary metal hydroxynitride electrocatalyst by using waste lithium cobalt oxide, which comprises the steps of (1) pulverizing a waste lithium cobalt oxide positive electrode material, screening, grinding the undersize product into powder, soaking in diluted hydrochloric acid, and recording the supernatant as A; (2) adding a sodium hydroxide solution into the solution A until the pH value of the solution is 7 to obtain a solution B; (3) respectively adding a ferric nitrate solution and ethanol into the solution B to obtain a solution C; (4) putting foamed aluminum with the diameter of 1cm*1cm into the solution C, soaking the foamed aluminum on the surface of the solution C by taking the foamed aluminum as a working electrode and the solution C as a reaction solution, and performing plasma discharge on the foamed aluminum in a nitrogen atmosphere so as to generate chemical reaction on the surface; and (5) washing the self-supporting electrode, and carrying out vacuum drying to obtain the bifunctional ternary metal hydroxynitride electrocatalyst. The method is simple, the whole production process is simple, conditions are mild, the process is easy to control, cost is low, and the method is suitable for large-scale production.

The invention discloses a method for preparing a high-activity ternary metal sulfide oxygen evolution catalyst from waste copper foils. The method comprises the following steps: (1) sequentially carrying out ultrasonic treatment on the cut waste copper foils by using 3M hydrochloric acid, ethylene glycol and acetone respectively, and soaking the treated waste copper foils in a manganese chloride solution for later use, denoting as A; (2) adding a sodium sulfate solution into the solution A until the pH value of the solution is 5 to obtain a solution B; (3) adding a ferric trichloride solutioninto B to obtain C; (4) taking a copper foil as a working electrode, a platinum net as an auxiliary electrode and C as an electrolyte, electrifying to carry out electrochemical deposition reaction, and dropwise adding a sodium thiosulfate solution into the solution C; and (5) washing the self-supporting electrode, and drying to obtain the high-activity ternary Cu-Fe-Mn sulfide oxygen evolution catalyst. The method is simple, the process is controllable, the preparation period is short, and the prepared catalyst is stable in performance and high in catalytic activity and has regular nanosheet flower-like morphology.

The invention discloses a FeSe-based amorphous film catalyst and a preparation method and application thereof. A structural formula, by atom percent of each element, of the catalyst is FexCoySez, wherein x is larger than or equal to 20 and smaller than or equal to 50, y is larger than or equal to 20 and smaller than or equal to 50, z is larger than or equal to 5 and smaller than or equal to 35, the amount of x, y and z is 100, and y is smaller than or equal to the amount of x and z. The FeSe-based amorphous film catalyst is prepared according to a magnetron sputtering coating method and greatin oxygen evolution performance and can be used as an oxygen evolution catalyst.

The invention discloses a FeCoMoPB amorphous nanoparticle oxygen evolution catalyst and a preparation method thereof. The chemical formula of the oxygen evolution catalyst is (Fe50Co50)<100-x>MoxPB based on the mole percentage content of each atom, wherein x is equal to 1-10. The preparation method of the oxygen evolution catalyst comprises the following steps: mixing water-soluble ferrite, a cobalt salt, molybdate and sodium hypophosphite, adding deionized water, stirring until complete dissolution to obtain a reaction precursor solution, and then introducing protective gas to remove oxygen in the solution; preparing an aqueous solution of sodium borohydride; slowly dropwise adding the sodium borohydride solution into the precursor solution, fully reacting, and keeping intense stirring and continuously introducing protective gas in the dropwise adding and reacting process; and carrying out suction filtration on the reacted solution, cleaning the obtained precipitate, and carrying out vacuum drying to obtain the FeCoMoPB amorphous nanoparticles with a core-shell structure. Through micro doping of the Mo element and the synergistic effect of multiple elements, the oxygen evolution catalytic performance, structural stability and durability of the Fe-Co-P-B amorphous nano-particle are greatly improved.

A Heteroatom Nitrogen Surface Modified MoS 2 The preparation and application of nanometer materials belong to the technical field of electrocatalytic material synthesis. The prepared catalyst has excellent electrocatalytic oxygen evolution performance. The preparation process includes the following steps: (1) carbon cloth (3*3cm) is ultrasonicated in acetone, ethanol, and water for 10 minutes; (2) ammonium molybdate and thiourea are mixed in water in proportion and reacted with clean carbon cloth React at high temperature in the kettle. After cooling down to room temperature, rinse the carbon cloth with ethanol and water in turn, and dry it; (3) the MoS obtained in step (2) 2 Nanosheets and ammonia water are placed in a reactor at high temperature for a certain period of time to obtain heteroatom nitrogen-modified MoS 2 nanomaterials. The catalyst obtained in the invention exhibits excellent electrocatalytic performance, has a simple preparation process and low cost, and is suitable for large-scale production.

The invention discloses a method for preparing oxygen precipitation electrode based on three-dimensional porous grapheme. The method includes the following steps: 1) oxidizing graphite powder to prepare a graphite oxide; 2) carrying out vacuum drying on the graphite oxide prepared in step 1) at 60-80 DEG C; 3) carrying out heat treatment on the dried graphite oxide prepared in step 2) in vacuum at 80-120 DEG C for 8-24 hours; 4) heating the graphite oxide in step 3) in vacuum to 180-250 DEG C in vacuum and keeping for 5-60 minutes. The oxygen precipitation electrode based on three-dimensional porous grapheme prepared by the method disclosed by the invention has excellent catalytic performance of oxygen precipitation and good long term stability, can be used for replacing costly iridium and an oxide electrode thereof, is widely applied in fields such as photocatalytic water splitting and metal-air battery as well as other energy source converting devices, and has a high practical value, and the raw material of the oxygen precipitation electrode disclosed by the invention is common graphite powder, so that the oxygen precipitation electrode is wide in raw material source, low in cost, simple in preparation method and suitable for mass production.

The invention relates to a FeNiCo oxygenated chemical nanosheet with adjustable metal proportion as well as a preparation method and application thereof. The preparation method comprises the followingsteps that S1, a metal organic framework ZIF-67 is prepared by adopting a normal-temperature standing precipitation method; S2, FeSO4*7H2O and NiSO4*6H2O are weighed according to a certain ratio andare fully dissolved in deionized water so as to obtain liquid A, and a proper amount of metal organic framework ZIF-67 powder obtained in the step S1 is taken and and is fully dispersed in absolute ethyl alcohol so as to obtain liquid B; S3, the liquid B is rapidly poured into the liquid A, and stirring is carried out; and S4, a product obtained in the step S3 is washed, and a centrifuged productis subjected to freeze drying so as to obtain the FeNiCo oxygenated chemical nanosheet with uniform morphology. The FeNiCo oxygenated chemical nanosheet as well as the preparation method and application thereof have the beneficial effects that the FeNiCo oxygenated chemical nanosheet serves as an anode for electrocatalytic water decomposition, and the oxygen evolution catalytic performance is excellent; and the material is simple in synthetic process, low in cost, environmentally-friendly and extremely high in repeatability.

The invention discloses a preparation method of a MOF catalyst with enhanced catalytic activity of gluconic acid and an application based on the catalyst for water electrolysis and oxygen evolution, belonging to the technical fields of nano-catalysis, nano-materials and metal-organic framework materials. The main steps are as follows: after blending the isophthalic acid solution and the nickel nitrate solution at room temperature, adding the prepared gluconic acid solution, using the mixed solution as an electrolyte to deposit on the nickel foam, and after activation, the nickel gluconate-metaphthalic acid is obtained. Nickel formate composite catalyst, that is, MOF catalyst with enhanced catalytic activity of gluconic acid. The cost of raw materials used in the preparation of the catalyst is low, the preparation process is simple, the reaction energy consumption is low, and the catalyst has industrial application prospects. The catalyst is used for efficiently catalyzing the electrolysis of water for oxygen evolution, and has good electrocatalytic activity and electrochemical stability for oxygen evolution.

The invention relates to a method for modifying and optimizing an iridium dioxide catalyst, in particular to a method for modifying and optimizing an anode catalyst of a membrane electrode assembly in pure water electrolysis hydrogen production technology, and belongs to the field of preparation of precious metal catalyst materials. The steps of the method are as follows: heat the iridium dioxide catalyst to 600°C to 900°C for 2h to 5h at a heating rate of 2°C / min to 10°C / min in an atmosphere of oxygen, and cool it after the heat treatment is completed. A modified and optimized iridium dioxide catalyst is obtained; the atmosphere with oxygen cannot contain gas that can react with oxygen. The method optimizes the performance and structure of the existing iridium dioxide catalyst through heat treatment, so that it has good oxygen evolution catalytic activity and stability.

The invention discloses a Ni3S2@Ni-Fe LDH oxygen evolution electro-catalysis electrode as well as a preparation method and an application thereof, and belongs to the field of oxygen evolution catalysis of water electrolysis. The preparation method comprises the following steps of carrying out pretreatment for a nickel matrix, and preparing a nickel-matrix anodic oxide film layer grown in situ through anodic oxidation for the nickel matrix; taking the nickel-matrix anodic oxide film layer as a precursor, and obtaining a Ni3S2 film layer with a nanorod-shaped structure through a sulfuration hydrothermal reaction; and carrying out a ferrum-doping hydrothermal reaction on the film layer subjected to the sulfuration treatment to obtain the Ni3S2@Ni-Fe LDH oxygen evolution electro-catalysis electrode. The method disclosed by the invention is novel, convenient to operate, low in cost, and suitable for industrial production; and the prepared Ni3S2@Ni-Fe LDH electrode material is used for an oxygen evolution reaction of water electrolysis, high in catalytic activity and stability, and capable of being used for industrialized water electrolysis production.

The invention discloses a preparation method of a catalyst based on a nickel-based three-dimensional metal organic frame substance and an application of oxygen evolution by water electrolysis based onthe catalyst, and belongs to the technical field of nanomaterials, nano catalysis and metal organic frame substance materials. The method mainly comprises the steps of performing electro-deposition on polyaniline with foamed nickel to form a Ni@PANI composite, applying gel prepared from a ligand H3TATAB and cobalt nitrate on the Ni@PANI composite, and heating in an air atmosphere to form a Ni@Co2O3 / CN composite catalyst, namely the catalyst based on the nickel-based three-dimensional metal organic frame substance. Raw materials used for preparation of the catalyst are low in cost; a preparation technology is simple; the reaction energy consumption is low; and the catalyst has industrial application prospects. The catalyst is used for efficient catalysis of water electrolysis for oxygen evolution and has good oxygen evolution electrocatalytic activity and electrochemical stability.

The invention relates to a modification and optimization method of an iridium dioxide catalyst, in particular to a modification and optimization method of a membrane electrode assembly anode catalyst in a pure water electrolysis hydrogen production technology, and belongs to the field of preparation of noble metal catalyst materials. The method comprises the steps of heating an iridium dioxide catalyst to 600-900 DEG C in an oxygen atmosphere at a heating rate of 2-10 DEG C / min, carrying out heat treatment for 2-5 hours, and after the heat treatment is finished, cooling to obtain the modified and optimized iridium dioxide catalyst, wherein the atmosphere with the oxygen does not contain gas capable of reacting with the oxygen. According to the method, the performance and the structure of the existing iridium dioxide catalyst are optimized through heat treatment, so that the iridium dioxide catalyst has good oxygen evolution catalytic activity and stability.

The invention provides a kind of porous nano-flower Ni 2 The preparation method of P material includes the method of self-assembly induced by solvent volatilization to prepare nickel precursor, and then obtain nickel compound by roasting, and further use phosphorus source for phosphating treatment to obtain Ni 2 P material. Another aspect of the present invention provides a Ni 2 P material. Ni prepared by the present invention 2 The P material is used in the oxygen evolution reaction of electrolyzed water, and has fast catalytic kinetic performance and good catalytic stability. The invention has the advantages that the preparation method is simple to operate, the material has a stable morphology and structure, and has a porous structure, which is beneficial to the contact between the reactant and the catalyst during the catalytic reaction process, and the material transport of the reactant and the product.

The invention discloses a sulphur vacancy richened Ni3S2 nanorod oxygen evolution electro-catalysis material and a preparing method and application thereof, and belongs to the field of electrolytic water catalysis. The preparing method comprises three steps that firstly, a precursor film layer is prepared through anodic oxidation treatment of a nickel sheet; secondly, the precursor film layer is subjected to annealing treatment to obtain oxygen vacancy richened NiO film layer; and finally, the film layer obtained after annealing is subjected to hydrothermal sulfidizing to obtain the sulphur vacancy richened Ni3S2 nanorod oxygen evolution electro-catalysis material. As the existence of the sulphur vacancy, energy barriers needing to be overcome by a midbody on adsorption or desorption on the catalyst surface are reduced, and the oxygen evolution catalytic performance is greatly improved. Sulphur vacancy richened Ni3S2 nanorods grow on a nickel substrate in situ, the resistance between acatalyst and the substrate is reduced, and meanwhile, the oxygen evolution catalyzing stability is improved. The method is simple in operation, the requirement for preparing equipment is low, the material is environment-friendly, the preparing method has generalizability, and the development and application of the transition metal sulfide catalyst are further promoted.

The invention discloses a preparation method of a coating for a difunctional catalyst applied to electrolysis of water. The preparation method comprises the following steps: with graphite, Ni, Fe, Cu and other metals and netted metals thereof as a conductive substrate, sequentially carrying out acid pickling, alcohol washing, water washing, drying and other pretreatment on the conductive substrate for later use; with an acidic aqueous solution containing phosphomolybdic acid, nickel nitrate, sodium citrate and boric acid as an electroplating solution, conducting cathode plating on a substrate electrode at a normal temperature by adopting a constant current method, wherein current density is 30-75 mA / cm<2>, and plating time is 30-60 min; and with an aqueous ferric nitrate solution as an electroplating solution,conducting secondary cathode plating on the substrate at a normal temperature by adopting a constant potential method, wherein a potential ranges from -1.0 V to -1.5 V, and plating time ranges from 60 min to 120 min. The Ni-Mo-Fe-O-B-P compound high-efficiency catalyst coating prepared by the method has the functions of catalyzing hydrogen evolution and oxygen evolution at the same time, the preparation process of the catalyst is simplified, material and preparation cost is reduced, and the stability of long-time operation of the electrode is improved.

The invention provides a preparation method of alpha-manganese dioxide. By the preparation method, regulation and control of the Mn<3+> content of the alpha-manganese dioxide can be achieved through change of the reaction temperature and the reaction time; moreover, a catalyst obtained after compounding the prepared alpha-manganese dioxide with nitrogen-doped conductive carbon powder has excellentoxygen reduction and oxygen evolution catalyzing performance; by the preparation method, doping of trivalent manganese ions and preparation of the alpha-manganese dioxide can be completed in one pot;in addition, a reaction condition is mild, the synthesis process is simple, and environment friendliness is achieved.

The invention discloses a FeSe-based amorphous thin film catalyst and its preparation method and application. The structural formula according to the atomic percentage of each element is: Fe x co y Se z , wherein 20≤x≤50, 20≤y≤50, 5≤z≤35, x+y+z=100, y≤x+z. The FeSe-based amorphous thin film catalyst of the invention is prepared by a method of magnetron sputtering coating, has good oxygen evolution performance, and can be used as an oxygen evolution catalyst.