729 results about "Electrocatalyst" patented technology

The application provides a preparation method of a self-coiled structure molybdenum disulfide / nitrogen-doped porous carbon composite material, a product and application, high-content nitrogen-doped porous carbon material is synthesized by inducing dicyandiamide molecules to undergo a supramolecular self-assembly process, and on this basis, a hydrothermal reaction is carried out to coat molybdenum sulfide sheet layer material on the surface, and finally, a self-heating coiling treatment is carried out to form a carbon-based electrocatalyst of the self-coiled structure molybdenum disulfide / nitrogen-doped porous carbon. Compared with a high specific surface area carbon-based catalyst, high doping concentration of nitrogen atoms can provide more electron-rich properties to facilitate the adsorption of substances, and the self-coiled carbon-based material can exhibit very excellent electrochemical performance, especially in the aspect of electrochemical hydrogen production. The preparation method is simple in operation, low in preparation cost and suitable for large-scale production.

The invention belongs to the technical field of electrocatalysts, and discloses a method for preparing a heterogeneous monomolecular electrocatalyst by using water-soluble metalloporphyrin / phthalocyanine and a carbon carrier and application of the heterogeneous monomolecular electrocatalyst. The method comprises the following steps: 1) dissolving water-soluble metalloporphyrin / phthalocyanine in water to obtain a water-soluble metalloporphyrin / phthalocyanine solution; 2) soaking the electrode coated with the nanoscale carbon material in a water-soluble metalloporphyrin / phthalocyanine solution; or uniformly mixing the carbon nanomaterial organic solvent dispersion liquid with a water-soluble metalloporphyrin / phthalocyanine solution to obtain a composite catalyst; and dispersing the composite catalyst in an organic solvent, uniformly mixing with a binder solution, coating an electrode with the mixture, and drying to obtain the heterogeneous monomolecular electrocatalyst. The method disclosed by the invention is simple, catalyst molecules can be completely dispersed and adsorbed on a nanoscale carbon material in a single molecule form, and active sites are improved; the prepared monomolecular electrocatalyst is used for electrocatalysis of carbon dioxide reduction reaction, and high product selectivity and stability of carbon dioxide reduction can be realized.

The invention relates to a Ni monatomic doped zinc oxide electrocatalyst and application thereof in electrocatalytic synthesis of urea. Ni in the catalyst is anchored to ZnO crystal lattices in a monatomic form to form a Ni-O-Zn atomic-scale interface, Ni-Ni coordination does not exist, and the catalyst is prepared by adopting a hydrothermal method. The catalyst is loaded on a conductive substrate, CO2 and NO3 <-> are synergistically reduced in a CO2 saturated KHCO3 / KNO3 mixed electrolyte to generate urea, the urea yield is 41.38 mmol h <-1 > gcat <-1 > at-0.8 V (vs RHE), and the Faraday efficiency is 31.47%. Compared with Ni nano-particle loaded ZnO and non-doped ZnO, the catalyst has the advantages that the yield and selectivity of urea are remarkably improved, and the catalyst is suitable for efficiently synthesizing urea under mild conditions.

A preparation method of a high-activity nitrogen-doped carbon-loaded CoRu nano-alloy is used for enhancing pH universal hydrogen evolution, and is characterized by comprising the following steps: dissolving dopamine hydrochloride in an aqueous solution containing H2O2 and CuSO4. 5H2O, and magnetically stirring to form a uniform mixture; and pre-wetting carbon cloth with ethanol, immersing the pre-wetted carbon cloth in the dopamine solution for 10 minutes, taking out the pre-wetted carbon cloth, washing the pre-wetted carbon cloth with deionized water for three times, and carrying out vacuum drying to obtain the polydopamine modified carbon cloth marked as PDA / CC. And immersing the obtained PDA / CC into 20 mL of aqueous solution containing Co (NO3) 2.6 H2O and RuCl3 for 6 hours to realize metal ion adsorption. And washing and drying a sample, and calcining the sample in a tubular furnace at 700 DEG C in an N atmosphere for 2 hours to obtain the self-supporting nitrogen-doped porous carbon-loaded CoRu alloy material which is recorded as CoxRu (at) CN / CC. Through a synthesis strategy based on active ion capture and in-situ carbon thermal reduction, and through construction of a nitrogen-doped carbon cobalt ruthenium alloy nanostructure and a strong metal-carrier synergistic effect, efficient hydrogen overflow and establishment of stable active sites are realized; therefore, the performance bottleneck that high activity and high stability of a traditional electrocatalyst in a wide pH range are difficult to cooperate is broken through.

The application discloses a method for realizing resource utilization of phenol pollutants in water by using a nickel-ruthenium hybrid electrocatalyst, and belongs to the technical field of environmental electrocatalytic water treatment. The nickel-ruthenium hybrid electrocatalyst loaded on carbon cloth is prepared by using a simple two-step electrodeposition method, aiming at problems such as high energy consumption, high material consumption and high carbon emission of a traditional wastewater treatment mode. The catalyst has high stability and high selectivity, and can realize directional conversion of phenol pollutants in water into high-value p-benzoquinone under mild conditions, so as to simultaneously realize removal of the phenol pollutants in water and recovery of high-value-added chemicals. The application provides a new method for treatment and resource utilization of high-concentration phenol wastewater.

The invention relates to the field of efficient integrated assemblies of PEM water electrolysis hydrogen production systems, and discloses an efficient integrated assembly for a PEM exchange membrane water electrolysis hydrogen production system, an anode electrode unit in the integrated assembly comprises a ruthenium-based high-entropy metal oxide electrocatalyst, and the ruthenium-based high-entropy metal oxide electrocatalyst comprises ruthenium, tin, manganese, chromium and tantalum elements; the preparation method of the ruthenium-based high-entropy metal oxide electrocatalyst comprises the following steps: grinding solid inorganic ruthenium salt, tin salt, manganese salt, chromium salt, tantalum salt and sodium chloride to obtain a metal salt mixture; carrying out ball milling to obtain a high-entropy metal oxide precursor; and carrying out heat treatment and water washing treatment on the precursor to obtain the ruthenium-based high-entropy metal oxide electrocatalyst. The invention also discloses application of the electrocatalyst in water electrolysis oxygen evolution reaction in an acid solution and water electrolysis hydrogen production reaction of a PEM proton exchange membrane, and the electrocatalyst shows excellent electrocatalytic activity.

The invention provides an alkaline hydrogen evolution electrocatalyst and a preparation method and application thereof.The alkaline hydrogen evolution electrocatalyst comprises a carrier and an active component, the carrier comprises a reduced graphene oxide layer and a rare earth element doped transition metal oxide layer which are sequentially stacked, and the active component comprises precious metal; the active component is loaded on the surface of one side, far away from the reduced graphene oxide layer, of the rare earth element doped transition metal oxide layer. According to the alkaline hydrogen evolution electrocatalyst provided by the invention, the transition metal oxide layer doped with the noble metal and the rare earth element can form a synergistic catalysis interface, and the reduced graphene oxide layer is used as a carrier substrate, so that a continuous conductive network can be constructed to guarantee electron transmission, and a loaded material can be dispersed and supported through a lamellar structure of the reduced graphene oxide layer; through the synergistic effect of the components and the structure, the hydrogen evolution reaction activity and stability of the catalyst under the alkaline condition are remarkably 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 an enzyme-mimic CeO2-based multi-active-site catalyst, a preparation method and application thereof, an electrolytic tank and a battery. CeO2 nanorods are synthesized through hydrothermal and high-temperature pyrolysis methods, and then metal ions are anchored to the surfaces of the CeO2 nanorods through strong interaction of carriers; metal nanoclusters and nanoparticles with specific sizes are synthesized, and then chemical vapor deposition reaction is performed through sodium hypophosphite, so that the bionic nano-enzyme electrocatalyst with multiple active sites is obtained. The multi-active-site catalytic material provided by the invention has high selectivity of ammonia production from nitrate radicals, ammonia production efficiency and Faraday efficiency when being used as a cathode. When the RuO2 is used as an anode, in an alkaline water electrolysis reaction, when the current density is 50 mA / cm < 2 >, the overpotential is 288 mV, which is far better than that of commercial RuO2. Based on excellent oxidation and reduction performance, the zinc nitrate battery has high power density, high ammonia yield and good charge-discharge cycle stability, and nitrate removal, ammonia production and power supply can be achieved at the same time.

The invention discloses a high-entropy perovskite hydroxide, a preparation method thereof and application of the high-entropy perovskite hydroxide in electro-catalysis of nitrate to synthesize ammonia, and belongs to the technical field of high-entropy perovskite hydroxides. The high-entropy perovskite hydroxide is ASn (OH) 6, and A is one or more of Zn, Mn, Co, Ni and Cu. The high-entropy perovskite hydroxide electrocatalyst which is simple in synthesis method, stable in structure and easy in raw material obtaining is obtained, the electrocatalyst can be applied to electrocatalysis of nitrate to synthesize ammonia, the highest NH3 Faraday efficiency is 98.16%, and the yield is 5.12 mg h <-1 > mgcat <-1 >. And a foundation is laid for developing other high-entropy perovskite compounds as electrocatalysts for electrocatalytic synthesis of nitrate.

An electrocatalyst comprising a layered double hydroxide is disclosed, wherein the layered double hydroxide comprises intercalated charge-balancing anions and at least some of the charge-balancing anions are basic anions. The electrocatalyst is useful for alkaline seawater electrolysis (ASWE), and the latter can demonstrate stable operation at a high current density.

The preparation method mainly comprises the following steps: dissolving chloroplatinic acid, lanthanum salt and manganese salt in water according to a certain proportion, adding a complexing agent, adjusting the pH value, and carrying out gelation, drying and high-temperature calcination to obtain a perovskite precursor; and treating in a reducing atmosphere, so that platinum atoms are selectively dissolved out from crystal lattices, high-dispersion platinum nanoparticles are formed on the surface, and finally, the composite catalyst with extremely low platinum loading capacity is obtained. According to the method, platinum species are stably anchored through the perovskite carrier, the platinum atom utilization rate and catalytic stability are remarkably improved, excellent electrocatalytic activity and durability are shown in the oxygen reduction reaction, and the method can be widely applied to energy conversion equipment such as zinc-air cells and fuel cells and has important practical application value.

The application discloses a preparation method and application of a zirconium dioxide loaded iridium oxide nanocluster oxygen evolution electrocatalyst. A mixed solution of zirconium salt, amide solvent and organic acid is prepared, and the mixed solution is kept at 120 DEG C for 24 hours; after cooling, the white product is separated, washed and dried. Then, the product and iridium salt are dispersed in a mixed solution of tetrahydrofuran and water, and sodium nitrate and potassium nitrate aqueous solution are added under stirring; after stirring, rotary evaporation is carried out at 60 DEG C, and the greenish powder obtained after drying is vacuum dried at 60 DEG C for 12 hours; the greenish powder is kept in a muffle furnace at 450 DEG C for 30 minutes, and then cooled in air; the greenish powder is washed with deionized water and anhydrous ethanol for multiple times, and finally vacuum dried at 60 DEG C for 12 hours. The zirconium dioxide loaded iridium oxide material based on oxygen overflow stable tetragonal zirconia can be specially applied to an electrocatalyst for an oxygen evolution reaction in an acidic electrolyte, has excellent oxygen evolution reaction activity, follows a lattice oxygen mechanism in the reaction process, and can realize an oxygen overflow effect from tetragonal zirconia to iridium oxide nanoclusters to stabilize the catalyst.

The invention belongs to the technical field of electrocatalytic materials, and discloses a CeO2 / NiCo2O4 heterojunction oxygen evolution reaction electrocatalyst and a preparation method thereof. According to the electrocatalyst, a composite protection layer composed of nitrogen-doped carbon quantum dots and CeO2 is constructed on the surface of a NiCo2O4 nanosheet array, cobalt ions are captured and dissolved out through pyridine nitrogen, reintegration is promoted through CeO2 oxygen vacancy, and interface dynamic self-repairing is achieved. And the nitrogen-doped carbon quantum dots are embedded into the CeO2 layer and are in direct contact with NiCo2O4 to synergistically inhibit cobalt loss and maintain structural integrity. By constructing the CeO2 / nitrogen-doped carbon quantum dot composite interface layer with dynamic ion capture and self-repairing capabilities, the problems of structure instability and performance degradation caused by cobalt ion dissolution of the NiCo2O4-based oxygen evolution reaction electrocatalyst under the working condition of strong oxidizing property are successfully solved; the method has important application value and industrialization prospect in the technical field of green hydrogen energy electrolyzed water.

The application relates to the development and technical field of electrocatalysts, and discloses a benzothiadiazole modified single-atom zirconium-doped metal copper electrode material and a preparation method and application thereof. The preparation method comprises the following steps: dissolving inorganic copper salt and inorganic zirconium salt, adding the inorganic copper salt and the inorganic zirconium salt into an alkaline solution, and performing hydrothermal reaction to obtain a single-atom zirconium-doped copper oxide precursor; dissolving benzothiadiazole, adding the benzothiadiazole into a dispersion solution of the single-atom zirconium-doped copper oxide precursor to obtain a mixed solution; spraying the mixed solution on a polytetrafluoroethylene film substrate loaded with copper nanoparticles to obtain a benzothiadiazole modified single-atom zirconium-doped copper oxide precursor electrode material; and performing electrochemical reduction treatment on the benzothiadiazole modified single-atom zirconium-doped copper oxide precursor electrode material to obtain a benzothiadiazole modified single-atom zirconium-doped metal copper electrode material. The electrode material is applied to an electro-reduction carbon dioxide reaction as a working electrode, exhibits excellent electro-reduction CO2 performance in an acidic environment, and realizes high-value-added C 2+ product with high selectivity.

The application provides a preparation method of a large-size tungsten-doped NiFe nanowire electrocatalyst, wherein the foam nickel is immersed in a corrosion solution containing Fe and W for 3-15 minutes to obtain a W-doped NiFe catalyst. The nanometer structure of the catalyst is an ordered nanowire with a diameter of 40-60 nm, and there is no agglomeration phenomenon, which is beneficial to the exposure of active sites and the release of oxygen, and the dense structure can improve the stability of the catalyst. When the W-NiFe catalyst is applied to an oxygen evolution reaction, the overpotential is only 143.7 mV when the current density is 10 mA cm ‑2 , and the catalyst can be stably operated for 150 hours under a current density of 500 mA cm ‑2 . The catalytic performance and stability of the catalyst are superior to those of a noble metal IrO2.

The application provides a porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction and a preparation method. The preparation method comprises the following steps: adding 4,4-diamino diphenyl ether and pyromellitic dianhydride into a solvent, uniformly mixing, and preparing a polyamide acid precursor spinning solution; electrospinning the prepared polyamide acid precursor spinning solution to prepare polyamide acid nanofibers; immersing the prepared polyamide acid nanofibers in a mixed metal salt solution containing cobalt salt, lanthanum salt and zinc salt to prepare polyamide acid nanofiber precursors loaded with metal ions; and performing programmed temperature heat treatment on the prepared polyamide acid nanofiber precursors loaded with metal ions in a protective atmosphere to prepare the porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction. The prepared porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction has excellent electrochemical oxygen reduction reaction and oxygen evolution reaction bifunctional catalytic activity.

The application provides a copper-tin metal oxide composite electrocatalyst for efficient ammonia oxidation and a preparation method thereof, and belongs to the technical field of electrocatalysis. The self-supporting SnO2-Cu2O composite electrocatalyst which is not easy to fall off and has good conductivity is obtained by in-situ growth on a conductive substrate through a two-step hydrothermal method. The application utilizes the synergistic effect between Cu2O and SnO2, exhibits excellent AOR performance, and has low initial potential and long-term running stability. The preparation method is simple, and the cost is low. In the fields of electrocatalytic ammonia-nitrogen wastewater treatment and ammonia electrolysis hydrogen production, the application has excellent industrial application prospect.

Low-cost and earth abundant, Ni1-xMox alloy nanocrystals, with sizes ranging from 18-43 nm and varying Mo composition (0.0-11.4%), were produced by a colloidal chemistry method for alkaline HER reactions. For a water splitting current density of −10 mA / cm2, these alloys demonstrate over-potentials of −62 to −177 mV, which are comparable to commercial Pt-based electrocatalysts (−68 to −129 mV). The cubic Ni0.934Mo0.066 alloy nanocrystals exhibit the highest activity as alkaline HER electrocatalysts, outperforming commercial Pt / C (20 wt %) catalyst.

The application discloses a preparation method and application of an oxygen-evolving electrocatalyst of iridium oxide anchored by surface titanium oxygen species. The catalyst is obtained by electro-oxidizing a titanium nitride supported metal iridium cluster pre-catalyst. The surface titanium oxygen species is obtained by electrochemical reconstruction of titanium nitride, and the iridium oxide is obtained by electro-oxidizing a metal iridium cluster. When the catalyst is used for an anode oxygen evolution reaction, the catalyst has excellent catalytic activity and significantly improved stability. Compared with existing catalysts, the catalyst provided by the application is obtained by electro-oxidizing a pre-catalyst. In a PEM electrolytic cell, the titanium nitride carrier in the pre-catalyst plays a role of a pore-forming agent in the electro-oxidation dissolution process, and the catalytic layer is spontaneously thickened, thereby solving the problems of poor uniformity and mechanical stability of a super-thin catalytic layer electrode of a PEM water electrolysis cell, and more easily realizing large-scale industrial application under an ultra-low iridium load.

Catalyst-coated ion-conducting membrane comprising an anode catalyst layer, a cathode catalyst layer and an ion-conducting membrane layer arranged between the anode catalyst layer and the cathode catalyst layer, wherein: the anode catalyst layer comprises an anode electrocatalyst and an ion-conducting polymer, wherein the anode electrocatalyst comprises particles of a platinum group metal or a platinum group metal alloy, and the anode electrocatalyst is present in the anode catalyst layer with a load of less than 0.20 mg of the platinum group metal per cm² of the anode catalyst layer;and the cathode catalyst layer comprises an ion-conducting polymer and a cathode electrocatalyst comprising platinum-containing particles and a carbon-based support, wherein the carbon-based support comprises individual primary particles or an aggregate of primary particles, the primary particles comprising pores, with some of the platinum-containing particles located within the pores and some of the platinum-containing particles located on an outer surface of the carbon-based support; wherein the platinum-containing particles on the outer surface of the carbon-based support have a mean average particle size of ≤3.0 nm; and wherein less than 50% of the surface area of ​​the platinum-containing particles is in contact with the ion-conducting polymer of the cathode catalyst layer.

This invention provides a NiCoB-P-F high-efficiency hydrogen evolution electrocatalyst, its preparation method, and its application. The catalyst uses a monomeric NiCoB substrate, on which phosphorus (P) and phosphorus (F) elements are co-doped. The mass ratio of P to F is (2-6):(1-3). The raw material for P doping is NaH₂PO₂; the raw material for F doping is NH₄F. The method employs a vapor deposition process to co-dope P and F elements onto the monomeric NiCoB substrate. The hydrogen evolution electrocatalyst of this invention enhances the electrocatalytic performance of the hydrogen evolution reaction under alkaline conditions, with an overpotential η... 10 As low as 25mV, η 300 With a voltage as low as 134mV, it can significantly reduce the hydrogen evolution overpotential under high current density, thereby improving the overall catalytic efficiency and stability.

A method for preparing and applying an iron hydroxyl oxide-metal-organic framework heterostructure alkaline water electrolysis catalyst is disclosed, belonging to the technical field of electrochemical energy storage materials. The preparation method involves: firstly, anolysing iron foam under constant current; then dissolving 2,5-dihydroxyterephthalic acid and nickel nitrate hexahydrate in a mixed solvent of N,N-dimethylformamide / ethanol / deionized water; transferring the mixture to a reaction vessel, tilting the iron foam into the vessel, sealing and heating the reaction, and then naturally cooling to room temperature; removing the iron foam, rinsing it with deionized water and ethanol (both sides), and finally vacuum drying. This method is simple and reproducible, requiring no cumbersome high-temperature pyrolysis or etching processes, and is suitable for large-scale preparation. In a standard three-electrode system, the prepared electrocatalyst is directly used as the working electrode in a 1 M KOH electrolyte for electrocatalytic reaction; the electrocatalyst exhibits excellent water splitting activity and cycling stability at high current densities.

The application prepares an NP co-doped graphite nanosheet electrocatalyst, and has the advantages of simple and efficient preparation method, easy operation, low cost and practical application significance. The application takes cheap graphite powder as raw material, takes melamine and sodium hypophosphite as nitrogen source and phosphorus source respectively, and prepares the NP co-doped graphite nanosheet in a tube furnace through a high-temperature gas phase method. The NP co-doped graphite nanosheet is activated by electrochemistry to generate adjacent quinone structures with basic OER activity and further oxidize P-containing functional groups to obtain more phosphoric acid functional groups with HER activity, and the NP co-doped graphite nanosheet exhibits excellent electrocatalytic performance. The overpotential of the basic OER is only 314 mV, and the overpotential of the acidic HER is only-69.4 mV.

This invention relates to the field of electrocatalyst technology, and discloses a carbon fiber-supported Fe3O4 composite material, its preparation method and application, and a method for electro-Fenton oxidation degradation of organic pollutants. The method includes: (1) pretreating carbon fibers with hydrochloric acid to obtain pretreated carbon fibers; (2) reacting a mixed solution containing ferrous sulfate and nitrate with the pretreated carbon fibers and ammonia, allowing it to stand to obtain mixture I; and (3) heat-treating mixture I to obtain the carbon fiber-supported Fe3O4 composite material. This preparation method is simple, requires no particularly expensive equipment, can be synthesized at relatively low reaction temperatures, is easy to operate, and the resulting composite material exhibits excellent catalytic performance and stability.

The invention discloses an iridium-ruthenium diatom / sponge nickel composite material, a preparation method thereof and application of the iridium-ruthenium diatom / sponge nickel composite material in alkaline electro-catalytic hydrogen evolution. The preparation method comprises the following steps: weighing nickel acetate, dissolving hydrazine hydrate, chloroiridic acid and a ruthenium trichloride aqueous solution in deionized water to prepare a mixed solution, placing the mixed solution in a high-pressure reaction kettle, and carrying out a hydrothermal reaction to obtain the iridium-ruthenium diatom / sponge nickel composite material electrocatalyst. Compared with an original sponge nickel electrocatalyst, the iridium ruthenium diatom / sponge nickel composite material prepared by the invention has better alkaline electrocatalytic hydrogen evolution performance; the method has the advantages that the acidity of chloroiridic acid enables part of Ni atoms to be dissolved out to generate Ni vacancies, so that iridium-ruthenium diatomic nucleation sites are provided. The composite material can synergistically catalyze alkaline hydrogen evolution, the mechanism of the composite material provides alkaline H2O cracking sites for nickel sites, active hydrogen species are obtained, rapid desorption of hydrogen protons is further achieved through iridium-ruthenium diatoms, and therefore more excellent alkaline electrocatalytic hydrogen evolution performance is obtained.

The invention belongs to the technical field of electrocatalytic materials and electrolytic hydrogen production, and particularly relates to a composite electrocatalyst and a preparation method and application thereof. According to the preparation method of the Ni single active center composite electrocatalyst based on the high-rubidium high-silicon lithium ore base as the carrier, uniform loading and efficient activation of the Ni single active center on the ore carrier are achieved through the steps of pretreatment, acid etching activation, lithiation regulation and control, Ni active solution preparation, solvothermal loading, roasting shaping and the like on the high-rubidium high-silicon lithium ore. When the catalyst is applied to urea electrolytic hydrogen production, the catalyst has the advantages of low initial potential, low overpotential and high stability.

The invention belongs to the field of electrocatalyst preparation and application, and particularly relates to a CNS-FeNi2S4 / NF composite electrocatalyst and a preparation method and application thereof. According to the preparation method, a one-step hydrothermal method and a one-step solvothermal method are adopted, foamed nickel is taken as a substrate, and FeNi2S4 supported by cocatalysts CNS with different contents is loaded on the foamed nickel, so that the CNS-FeNi2S4 / NF composite electrocatalyst is obtained. By optimizing the content of the cocatalyst CNS, the composite electrocatalyst with excellent oxygen evolution performance is obtained, the overpotential of the electrocatalyst is reduced, and the electrochemical active surface area is increased, so that the composite electrocatalyst is subjected to electrocatalytic oxygen evolution reaction in an alkaline solution, and has high activity and good stability. The catalyst has the advantages of low cost, simple synthesis steps, greenness, no pollution and the like.

The application relates to the development and technical field of electrocatalysts, and discloses a preparation method and application of a proton sponge modified fluorine atom doped metal copper electrode material, which comprises the following steps: adding a dispersion solution of a proton sponge into a dispersion solution of a hydroxyl copper fluoride precursor to obtain a mixed solution; uniformly spraying the mixed solution on a polytetrafluoroethylene film substrate loaded with copper nanoparticles to obtain a proton sponge modified hydroxyl copper fluoride precursor electrode material; and then electrochemically reducing the proton sponge modified hydroxyl copper fluoride precursor electrode material to obtain the proton sponge modified fluorine atom doped metal copper electrode material. The application further discloses the proton sponge modified fluorine atom doped metal copper electrode material obtained by the above preparation method and application of the proton sponge modified fluorine atom doped metal copper electrode material to an electro-reduction carbon dioxide reaction as a working electrode. The electrode material provided by the application exhibits excellent electro-reduction CO2 performance in an acidic environment, and realizes the preparation of high-value C 2+ products with high selectivity under an industrial-grade current density.

The present application relates to the field of catalyst, discloses a kind of electrocatalyst and its preparation method and application.The electrocatalyst includes metal active component, oxide carrier component and optional activated carbon, and the loss rate of metal active component of the electrocatalyst is less than 0.3wt% after being soaked in 10wt% 60 DEG C hydrochloric acid for 24h.The method for preparing electrocatalyst includes: impregnating carrier with impregnation solution containing binder and metal active component precursor, and then sequentially drying and calcining, and the carrier is selected from oxide carrier and / or activated carbon.The application also discloses the application of electrocatalyst as described above in three-dimensional electrocatalytic oxidation treatment of organic amine wastewater.The application also discloses the application of binder in reducing the loss rate of metal active component of electrocatalyst.The electrocatalyst of the present application can quickly and effectively reduce COD in organic amine wastewater under the action of current, and has stable performance, efficient operation, suitable for long-period operation, and great potential for development.