91results about "Nickel sulfides" patented technology

The invention discloses a preparation method of a NiSH nano material, which comprises the following steps: dissolving nickel salt in absolute ethyl alcohol to form a solution A, and dissolving an organic ligand thiosalicylic acid in absolute ethyl alcohol to form an organic ligand solution B; mixing the solution A and the organic ligand solution B, and performing stirring reaction to obtain a mixed solution C; the mixed solution C and deionized water are mixed and stirred, guest molecules are added, stirring continues to be conducted, heating reaction is conducted, after the reaction is finished, products are collected and cleaned through centrifugation, the products are dried away from light, and the NiSH nanometer material is obtained, and the guest molecules are 4-fluorosalicylic acid, 4-trifluoromethylsalicylic acid or 4-bromosalicylic acid. According to the application of the NiSH nanometer material in the water-based nickel-zinc battery, the NiSH nanometer material is prepared into electrode slurry, the surface of carbon cloth is coated with the electrode slurry, and the electrode slurry is used as an electrode plate of the water-based nickel-zinc battery after being dried. The NiSH nano material prepared by the method has high conductivity and cycling stability, and the electrochemical performance of the aqueous nickel-zinc battery can be improved.

The invention relates to the technical field of etching waste liquid treatment, and provides a nickel-containing etching waste liquid treatment method which comprises the following steps: 1, neutralizing and extracting copper; step 2, nickel deposition; step 3, evaporative crystallization; wherein the step I specifically comprises the following steps: slowly adding sodium bicarbonate into the nickel-containing waste liquid, stirring to adjust the pH value of the waste liquid to weak acidity, preferentially forming a basic cupric carbonate Cu2 (OH) 2CO3 precipitate when Cu < 2 + > is within the pH value range, and stably remaining Ni < 2 + > in the solution, and carrying out operations such as filtering separation and the like; and the step 2 specifically comprises the treatment of adding sodium hydroxide into the nickel-containing filtrate from which most of copper is removed to adjust the pH value to be neutral and the like. According to the technical scheme, the problems that according to an existing nickel-containing etching waste liquid treatment method, the harmless treatment effect is achieved in a chemical precipitation mode, the main purpose is to stabilize solid nickel, although the emission requirement is met, the waste liquid still contains copper, soluble salt and other components, and huge resource waste is caused by direct emission are solved.

The invention discloses a preparation method of a NiS / NiSe2 heterojunction containing a non-interface Ni vacancy. The preparation method comprises the steps of precursor preparation and in-situ selenylation treatment. The invention further discloses the NiS / NiSe2 heterojunction containing the non-interface Ni vacancy. The NiS / NiSe2 heterojunction containing the non-interface Ni vacancy is prepared through the method.

This invention belongs to the field of lithium-ion battery technology, specifically relating to a composite cathode material for lithium-ion batteries and its preparation method. The composite cathode material consists of three parts: a cathode matrix material, a lithium replenishment material, and a catalyst material. The preparation method is as follows: (1) preparing a composite material of the cathode matrix material and the lithium replenishment material in situ; (2) dispersing the catalyst material on the surface of the composite material and forming a stable interface layer between the catalyst material and the lithium replenishment material. Through the method of this invention: the lithium replenishment material has both surface modification of the cathode matrix material and lithium replenishment of the negative electrode, simultaneously improving the battery's initial efficiency and cycle stability; introducing the catalyst material onto the surface of the lithium replenishment material in situ fixes the free O generated by the Li release from the lithium replenishment material, alleviating the battery swelling phenomenon and further improving the battery's cycle stability and safety; moreover, the preparation process is simple, the raw materials are cheap and readily available, the production cost is low, and it is easy to promote industrial production.

The invention discloses a resourceful treatment method for stainless steel pickling waste liquid and waste water. The waste liquid is divided into high-concentration waste liquid and low-concentration waste liquid according to the acid concentration and the salt concentration to be treated respectively. Sequentially recovering gypsum, chromic hydroxide, nickel sulfide, ferrous hydroxide and manganese-rich slag from the low-concentration waste liquid through gradient precipitation; and neutralizing free acid from the high-concentration waste liquid by using ferrous hydroxide generated in a low-concentration section, cooling and crystallizing to recover ferrous sulfate, deeply removing nickel by using nickel sulfide generated in the low-concentration section, and precipitating to recover chromium hydroxide. In the whole process, generation of ferric iron is strictly controlled, and high-value productization recovery of free acid and all metals is achieved. The method has the advantages of low medicament consumption, high metal recovery rate, high product value, no secondary pollution and the like.

The present invention discloses a bimetallic sulfide heterojunction modified diaphragm, a preparation method thereof, and an application thereof. The technical solution comprises the following steps: synthesizing a bimetallic sulfide heterojunction material having a three-dimensional flower-like structure constructed by self-assembly of NiS2-WS2 heterojunction nanosheets by a one-step hydrothermal method; then preparing the bimetallic sulfide heterojunction material into a slurry and uniformly coating the slurry on one surface of a commercial polymer diaphragm, thereby finally obtaining a bimetallic sulfide heterojunction modified diaphragm and applying the slurry to a lithium-sulfur battery; the NiS2-WS2 heterojunction in the bimetallic sulfide heterojunction modified diaphragm can improve interfacial activity, increase surface catalytic active sites, optimize the adsorption capacity for polysulfides, and promote catalytic conversion, thereby effectively improving the rate performance and cycle stability of the lithium-sulfur battery.

The invention provides a method for preparing a sulfide heterogeneous foam carrier from foam metal and application, and the method comprises the following steps: placing a sulfur source in a porcelain boat, placing the foam metal in another porcelain boat, placing the two porcelain boats in a quartz tube, and placing the quartz tube in a tubular furnace, placing a porcelain boat filled with a sulfur source at the upstream, close to a gas inlet, of a tubular furnace, and placing a porcelain boat filled with foam metal at the center of the tubular furnace; sealing the tubular furnace, continuously introducing inert gas to keep inert atmosphere, and then heating the tubular furnace to 400-800 DEG C for reaction; and after the reaction is completed, continuously introducing inert gas, reducing the temperature of the tubular furnace to room temperature, and taking out a product, namely the sulfide heterogeneous foam carrier.

The invention belongs to the technical field of new materials, and provides a preparation method of high-yield nickel disulfide (NiS2) or a nickel disulfide / sulfur compound (NiS2 / (x-2) S, 3 < = x < = 8) and an application of NiS2 or NiS2 / S in an electrode material. The preparation method comprises the following steps: mixing a nickel ion (Ni < 2 + >) solution with a sodium disulfide (Na2S2) solution or a sodium polysulfide (Na2Sx, x is greater than or equal to 3 and less than or equal to 8) solution, stirring and reacting for 0.5-12 hours, collecting precipitates obtained by reaction, washing and drying to obtain a NiS2 or NiS2 / (x-2) S (x is greater than or equal to 3 and less than or equal to 8) product. The preparation method is simple and easy to operate, low in cost, high in atom utilization rate, green and environment-friendly, high in safety and capable of realizing large-scale industrial production. And when used as an electrode material for a sodium ion battery, the composite material shows good electrochemical performance.

The application provides a kind of copper sulfide@nickel disulfide positive electrode material based on two-dimensional nanosheet wrapping three-dimensional cube and its preparation method and lithium-magnesium dual-ion battery, first using copper salt, alkaline solution and D (+) -glucose in the water bath condition of 70 DEG C, directional formation Cu2O cube.And then, Cu2O and nickel source, sulfur source and surfactant are synthesized by solvothermal synthesis, forming the structure of two-dimensional and three-dimensional combination of NiS2 nanosheet wrapping Cu2S cube.The two-dimensional and three-dimensional combination structure can shorten the particle transmission path, achieve the effect of fast charging and discharging, at the same time, provide more active sites, increase the specific surface area, fully contact with electrolyte, improve the cycle stability of battery.

The invention provides a process for generating a metal sulphide comprising nickel and / or cobalt, comprising the steps of: i. forming an aqueous metal sulphate solution by reacting sulphuric acid with a raw material feed comprising nickel and / or cobalt in water; ii. crystallizing said metal sulphate from said aqueous metal sulphate solution to form a crystallized metal sulphate in a mother liquor, the mother liquor comprising an uncrystallized metal sulphate; iii. separating said crystallized metal sulphate from said mother liquor; iv. reacting at least a portion of said uncrystallized metal sulphate with hydrogen sulphide in an acidic aqueous medium, thereby obtaining a slurry consisting of a solid phase comprising a metal sulphide precipitate and an aqueous phase comprising one or more impurities and sulphuric acid; and v. separating said solid phase and said aqueous phase.

The invention relates to the technical field of electrode materials, and particularly discloses a three-dimensional porous carbon composite electrode material and a preparation method thereof. The three-dimensional porous carbon composite electrode material provided by the invention comprises a multi-component metal sulfide core body and an N and S co-doped three-dimensional porous carbon layer coating the surface of the core body, wherein the multi-component metal sulfide core body comprises Mn, Ni, S and C. According to the invention, multi-component metal sulfide is adopted to synergistically inhibit diffusion, form nanoscale pores and relieve volume expansion, and meanwhile, by introducing the N and S co-doped three-dimensional porous carbon layer, more Na < + > adsorption active sites are provided, and the conductivity is enhanced.

The invention discloses a method and a system for purifying a magnesium sulfate solution. The method comprises the following steps: pretreating a magnesium sulfate solution containing nickel and cobalt impurities to remove suspended matters and organic matters in the magnesium sulfate solution; adding sodium hydrosulfide into the pretreated magnesium sulfate solution, enabling nickel and cobalt to respectively react with the sodium hydrosulfide to generate precipitates, and carrying out solid-liquid separation to obtain the purified magnesium sulfate solution and precipitates containing nickel sulfide and cobalt sulfide; evaporating and crystallizing the purified magnesium sulfate solution to obtain magnesium sulfate crystals, and drying to obtain a magnesium sulfate product; and carrying out post-treatment on the precipitate containing the nickel sulfide and the cobalt sulfide, and recovering nickel and cobalt in the precipitate. The method can efficiently remove nickel and cobalt impurities in the magnesium sulfate solution, has the advantages of high efficiency, environmental protection, recoverable resources and the like, and can reduce the production cost and improve the resource utilization rate.

The invention provides nickel sulfide as well as a preparation method, an electrochemical performance test method and application thereof, and relates to the technical field of electrochemical materials. The method comprises the following steps: adding nickel acetate hexahydrate and thioacetamide into a container, adding ultrapure water into the container, and uniformly stirring to obtain a mixed solution; transferring the mixed solution into a reaction kettle, sealing the reaction kettle, putting the reaction kettle into a drying oven, heating the reaction kettle to a first temperature for a first duration, and carrying out a hydrothermal reaction to generate nickel sulfide; and after the hydrothermal reaction is finished, after the reaction kettle is cooled to room temperature, opening the reaction kettle, and washing nickel sulfide in the reaction kettle to prepare nickel sulfide. According to the method, the concentration in nickel sulfide is accurately controlled by regulating and controlling the hydrothermal reaction time, and the electro-catalytic hydrogen evolution performance is improved, so that the performance of the nickel sulfide electrochemical material is optimized.

The invention discloses a heavy metal emission reduction and sludge reduction treatment process method for circuit board wastewater. The invention provides a layered precipitation strategy of'first acid, second alkali and second sulfur '. The method comprises the following steps: performing acid precipitation on alkaline organic wastewater by using acidic wastewater, and recovering printing ink residues; carrying out air stripping treatment on the copper ammonia wastewater by utilizing an alkaline condition, and precipitating high-purity copper hydroxide; and finally, carrying out deep precipitation on residual complexing heavy metals by utilizing excessive sulfides in the pretreatment stage, and further recovering copper resources in the comprehensive water tank through coprecipitation of copper hydroxide and copper sulfide. Sludge generated in each process is classified and treated; printing ink slag, biochemical residual sludge and copper / nickel sulfide sludge are subjected to synergistic pyrogenic process treatment; copper hydroxide sludge is selectively subjected to acid dissolution to prepare copper sulfate. Lime, ferrous sulfate and polyaluminum are not used in the whole process. According to the method, the medicament is utilized to the maximum extent, the sludge is reduced by 50% or above, and the resource value of valuable metal is increased by 3-5 times.

The invention belongs to the technical field of water electrolysis hydrogen production catalysts, and relates to a preparation method of a high-crystallinity self-supporting nickel sulfide nanosheet, which comprises the following steps: 1, dissolving dimethylglyoxime in absolute ethyl alcohol to form a solution A, and dissolving nickel nitrate hexahydrate in deionized water to form a solution B; 2, mixing and stirring the solution A and the solution B to generate nickel dimethylglyoxime precipitate; 3, centrifugally separating the nickel dimethylglyoxime precipitate, and alternately washing with deionized water and ethanol; 4, the purified nickel dimethylglyoxime is dispersed in a mixed solvent composed of deionized water and ethyl alcohol, and a dispersion system is obtained; 5, adding sodium sulfide into the dispersion system, uniformly mixing, and reacting at a constant temperature; 6, after the constant-temperature reaction is finished, naturally cooling to room temperature, centrifugally separating a solid product, washing with deionized water and ethanol, and carrying out vacuum drying to obtain the nickel sulfide electrocatalyst; the method is simple and easy to operate, and an effective scheme is provided for solving the problem of high cost of a traditional noble metal catalyst in the field of water electrolysis hydrogen production.

The invention discloses a Ni3S2 / Ni (OH) 2 / metal phthalocyanine heterojunction self-supporting electrocatalyst as well as a preparation method and application thereof. According to the catalyst, foamed nickel serves as a substrate and a nickel source, a Ni3S2 / Ni (OH) 2 nanosheet array precursor grows in situ through one-step hydrothermal, metal phthalocyanine is loaded through solvothermal, and the Ni3S2 / Ni (OH) 2 / metal phthalocyanine composite electrode material with a multistage heterogeneous interface is formed. The material can be used for preparing 2, 5-furandicarboxylic acid (FDCA) through efficient electro-catalysis of deep oxidation of 5-hydroxymethylfurfural (HMF) in an alkaline solution at room temperature; the metal phthalocyanine molecular catalyst and the nickel-based composite material are combined for preparing the self-supporting electrode for the first time, efficient and high-selectivity total oxidation of HMF is achieved in an alkaline environment, the structure avoids using a binder, the conductivity, the structural stability and the active site exposure degree are enhanced, and industrial large-scale preparation is facilitated.

The invention belongs to the technical field of functional materials, and particularly relates to a three-dimensional heterogeneous difunctional electrode material and a preparation method and application thereof. The preparation method of the three-dimensional heterogeneous difunctional electrode material comprises the following steps: S1, pretreating the foamed nickel substrate; s2, respectively dissolving cobalt nitrate hexahydrate, urea and ammonium fluoride into water to obtain a mixed solution A; s3, carrying out hydrothermal treatment on the pretreated foamed nickel and the mixed solution A; s4, surface cleaning is conducted on the foamed nickel obtained through the hydrothermal treatment with deionized water and ethyl alcohol; and S5, performing vulcanization treatment on the electrode material obtained in the step S4. In the alkaline seawater electrolysis and hydrazine oxidation reaction coupling process, the synthesized electrode material shows the hydrazine oxidation potential far lower than that of commercial precious metal in the hydrazine oxidation reaction, the energy consumption of seawater electrolysis hydrogen production in a mixed system is greatly reduced, and wide application prospects are achieved.

The present disclosure provides a cluster material and a preparation method thereof, the method comprising: converting a metal material or alloy material into metal ions; preparing a liquid medium, the liquid medium comprising a surfactant and a solvent; dispersing the metal ions in the liquid medium and applying an alternating pulse field to control the reaction and dispersion of the material to obtain a colloidal solution or suspension of the cluster material, and centrifuging the colloidal solution or suspension to obtain a cluster material powder. This scheme combines physical and chemical methods in a multi-step organic composite, and by utilizing an alternating field to regulate the growth process of cluster nucleation, it not only avoids the disadvantages of larger size and poor uniformity of clusters synthesized by physical methods, but also allows for targeted selection and change of reaction raw materials in the liquid medium according to the target product, thereby greatly improving the efficiency of chemical cluster synthesis and being more environmentally friendly.

The invention discloses a NiCo-LDH / Ni6S7 composite bifunctional catalytic electrode material with a self-supporting nano array structure and a preparation method thereof.The preparation method comprises the steps that urea is added into a first solvent, and heating and stirring are conducted till the urea is completely dissolved to obtain a solution A; sequentially adding nickel salt and cobalt salt into the solution A, and stirring until the nickel salt and the cobalt salt are completely dissolved to obtain a solution B; adding ammonium salt into the solution B, and stirring until the ammonium salt is completely dissolved to obtain a solution C; putting the cleaned and dried foamed nickel into the solution C for hydrothermal reaction, and washing and drying to obtain a NiCo-LDH material with a self-supporting nano array structure; and adding a vulcanizing agent into a second solvent, heating and stirring until the vulcanizing agent is completely dissolved to obtain a solution D, putting the NiCo-LDH material with the self-supporting nano array structure into the solution D for hydrothermal reaction, and washing and drying to obtain the NiCo-LDH / / Ni6S7 composite material with the self-supporting nano array structure. The problems that an existing LDH material is prone to agglomeration and curling and poor in conductivity, and catalytic performance is reduced due to the fact that a polymer adhesive is used are solved.

The application relates to a high-capacity sodium ion battery negative electrode material and a preparation method thereof. The high-capacity sodium ion battery negative electrode material comprises a carbon material base and a transition metal sulfide in-situ grown and embedded into the inside of the carbon material base; wherein the molar ratio of carbon elements in the carbon material base to transition metal elements in the transition metal sulfide is (50-1):1.

The application relates to a preparation method of an electrochemiluminescence sensor and application thereof, and belongs to the technical field of electrochemiluminescence sensors, and specifically comprises the following steps: step 1, firstly, a bare glassy carbon electrode is repeatedly polished with aluminum oxide powder, and then the electrode is thoroughly cleaned before use; Au@CN solution is coated on the electrode; step 2, after the electrode is dried, a conconavalin A solution is added dropwise, and after 1 hour, the electrode is washed with a phosphate solution to block the non-specific binding between the conconavalin A and the electrode surface; step 3, NMS / CNT@Glu solution is coated on the electrode surface, and after 1 hour, the obtained electrode is washed to remove the unbound NMS / CNT@Glu on the outer surface, so that an electrochemiluminescence sensor for detecting conconavalin A is obtained. When the sensor detects conconavalin A, a wide linear range and a low detection limit are exhibited, so that the sensor can be applied to actual detection.

This invention discloses a Co 0.2 Cd 0.8 This paper describes the preparation method of S / CaTiO3 / NiSx materials and their application in photocatalytic nitrogen fixation, belonging to the field of photocatalytic materials technology. Firstly, an S-type heterostructure Co was prepared using an ultrasonic method. 0.2 Cd 0.8 S / CaTiO3 composite, then using ultrasound to bond metalloid NiS x Nanoparticle co-catalysts and Co 0.2 Cd 0.8 S / CaTiO3 complex forms Co 0.2 Cd 0.8 S / CaTiO3 / NiS x Ternary composite photocatalyst. The semiconductor Co in this invention... 0.2 Cd 0.8 S and semiconductor CaTiO3 first form an S-type heterostructure, which not only accelerates the directional movement and separation of photogenerated electrons and holes, but also maintains the strong redox capability of photogenerated charge carriers; in addition, NiS is loaded onto the S-type heterostructure. x co-catalyst, NiS x Nanoparticle co-catalysts, acting as electron-capturing centers, can not only provide more reactive sites but also further improve charge separation efficiency.

The application provides a positive electrode material and a preparation method thereof, a positive electrode sheet and a lithium ion battery, and comprises a positive electrode active material and a coating layer coated on the surface of the positive electrode active material, wherein the coating layer comprises a lithium-rich reverse perovskite lithium supplement and a conductive agent, the mass content of the lithium-rich reverse perovskite lithium supplement is 0.01-10% of the mass of the positive electrode active material, and the mass content of the conductive agent is 0.01-3% of the mass of the positive electrode active material. Compared with the prior art, the positive electrode material provided by the application uses a lithium-rich reverse perovskite compound as a lithium supplement, is simultaneously compounded with the positive electrode active material to form a coating type structure, can additionally provide a large amount of lithium ions, makes up for the irreversible lithium loss of the negative electrode, and improves the reversible capacity of the full battery system.

The invention provides a method of cascade flash (FWF) Joule heating and a system thereof. The FWF Joule heating process subjects an external feedstock in an external vessel to a flash Joule heating process, wherein the flash Joule heating process of the external feedstock causes conversion of an internal feedstock within an internal vessel (the internal vessel is within the external vessel) to a converted material.

The invention provides a preparation method of a heterogeneous transition metal chalcogenide material. The preparation method comprises a heating step, a plasma forming step and a deposition step. In the heating step, the chalcogenide solid is heated at a heating temperature to form a chalcogenide gas. In the plasma forming step, reaction gas is introduced to assist the chalcogenide gas in forming chalcogenide plasma. In the deposition step, a substrate is arranged adjacent to the chalcogenide plasma, the substrate comprises a base material and a plating layer, and the chalcogenide plasma and the plating layer are subjected to a deposition reaction at a reaction temperature and a reaction pressure to form the heterogeneous transition metal chalcogenide material with excellent optical characteristics and a surface-enhanced Raman scattering effect. Therefore, the heterogeneous transition metal chalcogenide material can be applied to a surface-enhanced Raman scattering sensor.

The present invention belongs to, but is not limited to, the field of energy storage materials technology and discloses a method for preparing graphene-composite nickel sulfide and its application. A nickel source, a carbon source, and a sulfur source compound are added to a certain amount of deionized water. After a period of vigorous stirring, a green, clear solution is obtained. The clear solution is frozen with liquid nitrogen and placed in a freeze dryer. After drying at a certain temperature for several hours, a precursor material is obtained. The prepared precursor material is placed in a high-temperature tube furnace and subjected to high-temperature heat treatment in an inert atmosphere to obtain the graphene-composite nickel sulfide. The nickel source and carbon source compounds are nickel citrate, and the sulfur source compound is thiourea, and the mass ratio of the two is 1:6 to 5:4. The method of the present invention has the advantages of simplicity, high efficiency, and low preparation cost. The prepared graphene-composite nickel sulfide has high electrical conductivity and excellent structural stability, and exhibits excellent electrochemical performance as a negative electrode for sodium ion batteries.

The application belongs to the field of electrochemical catalysts, and particularly relates to a semiconductor phase MoS2 transition metal-based composite catalyst, a preparation method thereof and application of the semiconductor phase MoS2 transition metal-based composite catalyst in electrocatalytic synthesis of ammonia from N2O. The preparation method of the semiconductor phase MoS2 transition metal-based composite catalyst comprises the following steps: (1) dissolving molybdate and a sulfur-containing organic compound in water, then adding a soluble salt of a transition metal to form a uniform precursor solution by stirring; adding a phosphorization source into the precursor solution to uniformly disperse to obtain a mixed solution; (2) reacting the mixed solution in step (1) at 160-200 DEG C for 20-28 h, cooling to room temperature after the reaction is completed, and washing and drying the obtained product to obtain the semiconductor phase MoS2 transition metal-based composite catalyst. The application successfully constructs a close heterojunction of transition metal phosphide / sulfide and MoS2 in a MoS2-based composite structure through a one-pot hydrothermal-phosphorization synergistic preparation method.

The invention discloses a multilayer graphene-coated NiS / Ni3S2 composite material, a preparation method and a supercapacitor, NiS / Ni3S2 is uniformly laid on the surface of multilayer graphene to form a film, a small part of NiS / Ni3S2 forms raised nanosheets or nanosheet clusters, the nanosheets or nanosheet clusters are distributed sparsely in multilayer graphene sheets, the thickness of the multilayer graphene-coated NiS / Ni3S2 composite material is smaller than that of the multilayer graphene sheets, and the thickness of the multilayer graphene-coated NiS / Ni3S2 composite material is smaller than that of the multilayer graphene sheets. The distribution density on the edge of the multi-layer graphene sheet is relatively high. The weight ratio of the NiS and the Ni3S2 in the multi-composite material is 70 to 80 percent. The composite material provided by the technical scheme of the invention has excellent supercapacitor performance.

The application provides a preparation method of a molybdenum oxide-nickel sulfide heterostructure nanometer array electrocatalyst, and comprises the following steps: 1) preparing a nickel foam (NF) substrate; 2) preparing a homogeneous solution of thiourea and (NH4)6Mo7O 24 ·4H2O in a molar ratio of 10-20:1; 3) dissolving the thiourea and (NH4)6Mo7O 24 ·4H2O in deionized water to obtain a homogeneous solution after stirring; and 4) reacting the nickel foam substrate prepared in the step 1 with the homogeneous solution prepared in the step 2 to obtain a MoO x -Ni3S2 / NF heterostructure nanometer array sample. The technical scheme of the application can greatly improve the conductivity and catalytic efficiency of the catalyst and reduce the manufacturing cost.