29 results about "Chloride cobalt" patented technology

The invention relates to the technical field of catalyst processing, and discloses a high-activity transition metal phosphide electrolyzed water catalyst and a preparation method thereof, and the high-activity transition metal phosphide electrolyzed water catalyst comprises the following components by weight: 1-3 parts of cobalt chloride hexahydrate; 0.5 to 1.5 parts of ruthenium trichloride; 0.5 to 1.5 parts of iridium chloride (III) hydrate; 1-2 parts of copper sulfate pentahydrate; 2 to 4 parts of sodium hypophosphite; 1 to 2 parts of urea; 1 to 2 parts of glucose; 1-2 parts of sodium sulfide nonahydrate; 0.5 to 1 part of crystalline aluminum chloride; 50 to 100 parts of deionized water; and 0.1 to 0.5 part of hexadecyl trimethyl ammonium bromide. By introducing the plasma auxiliary treatment technology, the electronic structure of the catalyst is optimized, the conductivity and stability of the catalyst are improved, and the efficiency and durability of hydrogen production through water electrolysis are enhanced.

The invention discloses a Co / Bi4TaO8Cl Fenton-like catalyst as well as a preparation method and application of the Co / Bi4TaO8Cl Fenton-like catalyst. The preparation method of the catalyst comprises the following steps: dispersing a Bi4TaO8Cl material into water to obtain a first solution, and carrying out ultrasonic treatment on the first solution to obtain a Bi4TaO8Cl dispersion liquid; dropwise adding a cobalt chloride solution into the Bi4TaO8Cl dispersion liquid to obtain a second solution, stirring the second solution for a period of time, centrifugally collecting precipitates, washing and drying to obtain powder; and calcining the obtained powder under the protection of an inert gas atmosphere to obtain the Co / Bi4TaO8Cl material. The Co / Bi4TaO8Cl Fenton-like catalyst prepared by the method has the advantages of high efficiency, rapidness, greenness and economy, the ARB inactivation efficiency can reach 100% within 10 minutes, the ARG degradation rate can reach 2.3 min <-1 >, and the Co / Bi4TaO8Cl Fenton-like catalyst has good environmental factor interference resistance and cycle stability.

The utility model discloses a device for removing TOC in cobalt chloride, and relates to the technical field of TOC devices, in particular to a device for removing TOC in cobalt chloride, the device comprises a filter box and an oil removing box, the filter box is located above the oil removing box, the upper surface of the filter box is provided with a feeding port, the inner wall of the filter box is fixedly connected with a fixing frame, and the fixing frame is fixedly connected with a motor. A sliding block is slidably connected to the inner wall of the fixing frame, a first filter screen is fixedly connected to one side of the sliding block, and a second filter screen is arranged below the first filter screen. According to the device for removing TOC in cobalt chloride, impurities in liquid are filtered out through a first filter screen and a second filter screen, then the liquid enters the position above a belt and continuously runs in the solution through the belt, floating oil is sucked to the belt, then residual oil on the belt is scraped out through a scraper blade, and through a fixing frame and a sliding block, the TOC in the cobalt chloride is removed. And the first filter screen and the second filter screen can be conveniently replaced or cleaned, so that the effects of replacing and cleaning are achieved.

The invention belongs to the technical field of electrocatalyst preparation, and particularly relates to a metal sulfide-metal double-layer hydroxide heterostructure electrocatalyst as well as a preparation method and application thereof. The method comprises the following specific steps: S1, putting a piece of pretreated foamed nickel into a 0.005 g / mL-0. 015 g / mL thiourea aqueous solution, and sequentially carrying out ultrasonic treatment and heating to obtain nickel sulfide; s2, nickel chloride hexahydrate and cobalt chloride hexahydrate are dissolved in deionized water, thiourea is added, and the mixture is stirred until the mixture is completely dissolved; and performing electrochemical deposition by adopting a three-electrode system to form sulfur-doped cobalt-nickel double-layer hydroxide and nickel sulfide, and then sequentially cleaning and drying to prepare the metal sulfide-metal double-layer hydroxide heterostructure electrocatalyst. The electrocatalyst has the advantages of high performance, low cost, high benefit and the like.

The invention relates to the technical field of resin preparation, in particular to zirconium-loaded chromium removal resin as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing methyl acrylate, divinyl benzene and dibenzoyl peroxide to obtain a homogeneous organic mixture; mixing water, cellulose, sodium chloride and the methylene blue solution to obtain a mixture; mixing the homogeneous organic mixture, the mixed material and a pore-foaming agent, then carrying out heat treatment, recovering the pore-foaming agent to obtain a polyacrylic acid-divinylbenzene copolymer, and the like, so as to obtain the zirconium-loaded chromium-removing resin. The zirconium stability of the zirconium-loaded chromium removal resin is very good, and the resin-loaded zirconium shedding rate is less than 50% after the resin is soaked in 1 + 1 hydrochloric acid for 48 h; the zirconium-loaded chromium removal resin can effectively remove chromium metal in the cobalt chloride solution, the chromium metal is less than 0.01 mg / L, and the requirements of customers are met.

The invention discloses a portable handheld solid oxygen generator used in a special environment. The portable handheld solid oxygen generator comprises an oxygen generator body, a heat insulation protective layer and a shell. More than two heat insulation protective layers are arranged between the outer wall of the oxygen generator and the shell, and the overall outer diameter is not more than 70 mm; an oxygen generating core of the oxygen generator comprises chlorate, a catalyst, fuel and a chlorine inhibitor; chlorate is sodium chlorate or potassium perchlorate; the catalyst is one or more of cobalt oxide, cobaltosic oxide, cobalt hydroxide or cobalt chloride; the fuel is metal fuel; the chlorine inhibitor is one or more of barium peroxide or calcium hydroxide. The oxygen generator is fast in oxygen generation, high in purity, small in size, light in weight, free of maintenance, easy to operate, convenient to carry, safe, reliable, high in environmental adaptability and low in surface temperature, and can be used under the limiting working condition without being affected by the external environment.

The present invention provides a method for quickly detecting the content of calcium oxide and magnesium oxide in cement for roads, bridges and tunnels, and relates to the technical field of calcium oxide and magnesium oxide content detection. The detection method comprises the following steps: adding a digestion solution and an appropriate amount of pure water to cement to prepare a suspension, adding an appropriate amount of cobalt chloride to the suspension until it turns pink, placing a filter bag in the suspension, adding an appropriate amount of strong acidic cation exchange resin to the filter bag until the pink disappears, removing the filter bag containing the strong acidic cation exchange resin and placing it in an aluminum sulfate solution for treatment, filtering the aluminum sulfate solution and drying and weighing the precipitate produced in the solution, performing EDTA titration on the original suspension, and calculating the calcium oxide and magnesium oxide content. The present invention overcomes the shortcomings of the prior art. By separating calcium ions and magnesium ions and performing detection, the content of calcium oxide and magnesium oxide can be detected in only one test, while effectively improving the detection speed, accuracy and operational safety.

The present invention discloses a Co3S4 nanocatalyst rich in sulfur vacancies, its preparation method and application. Using cobalt chloride, ammonium fluoride, and urea as raw materials, the Co3S4 nanocatalyst is synthesized by a hydrothermal method. The raw material cost is low and the preparation method is simple. Then, a Co3S4 nanoflower with a spinel-type structure rich in sulfur vacancies is obtained through a reduction method. By controlling the reduction time, more active areas are increased and more active sites are exposed, showing good activity and product selectivity in electrocatalytic oxygen evolution and hydrogen evolution reactions.

The invention provides a preparation method of a color-changing calcium carbonate adsorption drying agent, which comprises the following steps: preparing porous calcium carbonate by using artificial agglomerated stone waste residue as a raw material through high-temperature calcination by a salting-out method, coupling by using an aluminum-titanium composite coupling agent, and preparing the color-changing calcium carbonate adsorption drying agent by using cobalt chloride as a coloring agent. The average pore size of the prepared color-changing calcium carbonate adsorption drying agent is about 38nm, the color-changing calcium carbonate adsorption drying agent is of a mesoporous structure, the saturated water absorption capacity in air can reach 45.625 mg / g, and the color is changed from blue to light red after water absorption. After being dried, the product turns from light red to blue and can be repeatedly used.

The invention discloses a preparation method of a thermochromic material for filling intelligent insulating glass. Weigh 0.01 - 0.03 g of cobalt chloride and add it to 20 mL of ethylene glycol solvent, and stir at room temperature until completely dissolved; then add 2 - 4 g of calcium chloride and stir until completely dissolved to obtain the thermochromic material. The material prepared by this method has a relatively low thermochromic temperature (38°C - 53°C), and has a high initial light transmittance at room temperature. At the same time, it can intelligently adjust its light transmittance as the temperature rises, and the light transmittance adjustment range is more than 20%, ultimately achieving the purpose of energy conservation.

The invention belongs to the technical field of chemical analysis and detection, and particularly relates to a magnetic eutectic solvent, a preparation method and application thereof, and a pretreatment method and a quantitative detection method of wastewater containing antidepressant drugs. The magnetic eutectic solvent provided by the invention comprises a hydrogen bond acceptor, a hydrogen bond donor and cobalt chloride, the hydrogen bond acceptor comprises tri-n-octylphosphine oxide; the hydrogen bond donor comprises aniline, acetamide, ethylene glycol, 1, 3-propylene glycol, thymol or L-menthol; the molar ratio of the hydrogen bond acceptor to the hydrogen bond donor is (1-4): (1-3); the molar ratio of the hydrogen bond acceptor to the cobalt chloride is (1-4): 0.5. The magnetic eutectic solvent provided by the invention has the characteristics of simple preparation and environmental friendliness; the extraction process is simple and convenient and separation is easy to realize when the compound is used as an extraction agent to extract the antidepressant in wastewater, the wastewater pretreatment process is remarkably simplified, and an efficient pretreatment method is provided for accurate detection of trace drug residues in a complex matrix.

The invention provides a crop total-effect biostimulant based on a mineral substance-enzyme composite technology and a preparation method of the crop total-effect biostimulant. The composition is prepared from a phase A, a phase B, a phase C and a phase D, wherein the phase A is prepared from full-spectrum mineral chelated microelement liquid, macroelement nitrogen, phosphorus and potassium: 50 kg of potassium nitrate, 20 kg of ammonium dihydrogen phosphate, medium element: 30 kg of magnesium sulfate heptahydrate, full-spectrum microelement: 5.0 kg of iron: EDTA-Fe: 3.0 kg of manganese: EDTA-Mn: 2.5 kg of zinc: EDTA-Zn: 1.0 kg of EDTA-Cu: 2.0 kg of boric acid: 0.5 kg of molybdenum: ammonium molybdate: 0.1 kg of cobalt chloride: 0.05 kg of selenium: sodium selenite: 8.0 kg of silicon: potassium silicate: 0.8 kg of titanium: citric acid titanium: rare earth; the preparation method comprises the following steps: dissolving the components in 600L of pure water, and fully stirring until the components are completely dissolved to obtain a phase A; according to the crop total-effect biostimulant based on the mineral substance-enzyme composite technology and the preparation method of the crop total-effect biostimulant, the crop nutrition and physiological problems can be solved, long-term coexistence of high-concentration mineral substances and enzyme activity is ensured, the crop stress resistance is improved, physiological diseases are prevented and treated, and the crop yield and quality are improved.

The invention relates to the field of metal surface treatment, and particularly discloses a gray passivation solution for zinc alloy and a passivation method. The gray passivation solution for the zinc alloy comprises the following components: 60-85 g / L of nickel chloride hexahydrate, 60-75 g / L of sodium thiocyanate, 5-10 g / L of ammonium chloride, 20-30 g / L of chromic nitrate nonahydrate, 10-15 g / L of cobalt chloride hexahydrate, 15-20 g / L of monopotassium phosphate, 40-60 g / L of zinc dihydrogen phosphate, 80-110 mL / L of a zinc nitrate solution, 20-30 g / L of manganese dihydrogen phosphate and 0.05-0.2 g / L of a surfactant, and a solvent of the gray passivation solution for the zinc alloy is pure water. The content of zinc nitrate in the zinc nitrate solution is 300g / L. The gray passivation solution for the zinc alloy has the advantages of being uniform in coating film surface, high in binding force and resistant to abrasion and corrosion.

The invention discloses a Co0. 66Nb1. 33O4 catalytic material and a preparation method and application thereof.The preparation method specifically comprises the following steps that firstly, a certain amount of niobium pentachloride and cobalt chloride hexahydrate are weighed and dissolved in a proper amount of concentrated hydrochloric acid respectively, then the niobium pentachloride and the cobalt chloride hexahydrate are mixed and stirred to be uniform under the ice-water bath condition, ammonia water with a certain concentration is slowly dropwise added into the mixture to adjust the pH value to be proper, and the mixture is stirred to be uniform; and transferring the mixed solution into a 50 mL reaction kettle, carrying out a hydrothermal reaction at 240-260 DEG C for 22-24 h, after the reaction is finished, naturally cooling to room temperature, and finally carrying out suction filtration, washing, drying and grinding on the obtained product to obtain the Co0. 66Nb1. 33O4 catalytic material. The invention provides a novel method for synthesizing the Co0. 66Nb1. 33O4 material, the prepared Co0. 66Nb1. 33O4 material has the advantages of high purity, good crystallinity, strong catalytic activity, multiple reaction active sites and the like, in addition, the application range of the Co0. 66Nb1. 33O4 material in the field of environmental catalysis is also widened, and the Co0. 66Nb1. 33O4 material can be applied to rapid catalytic degradation and removal of antibiotic pollutants in water.

The invention belongs to the technical field of cutting fluid, and particularly relates to environment-friendly metal cutting fluid and a preparation method thereof. The environment-friendly metal cutting fluid is prepared from the following raw materials in percentage by weight: 8-12wt% of an extreme pressure anti-wear agent, 5-9wt% of an anti-rust agent, 7-12wt% of a pH regulator, 1-3wt% of an emulsifier, 2-5wt% of a stabilizer, 0.2-0.5 wt% of a defoaming agent, 18-28wt% of water and the balance of base oil, the anti-wear reagent at extreme pressure is prepared by the following preparation processes: dissolving lanthanum nitrate and yttrium nitrate in water, adjusting the pH value in nitrogen, reacting under a heating condition, and treating to obtain layered La / Y-LDH; and dissolving hexaacetylene benzene and cobalt chloride in pyridine, adding the layered La / Y-LDH, performing ultrasonic dispersion, performing heating reaction, and treating to obtain the product. The environment-friendly metal cutting fluid disclosed by the invention has good wear resistance and excellent stability.

The invention discloses a carbonized fabric and a preparation method thereof. A metal chlorate solution (such as cobalt chloride, nickel chloride and other metal chlorates) is introduced as a charring coating, so that a conductive network can be stabilized in the charring process, the microstructure regulation and control capability is improved, and the high temperature resistance and oxidation resistance of the material can be enhanced. According to the material, renewable fibers are used as raw materials, carbon conversion is achieved through a green low-energy-consumption technology, and the material has good electromagnetic shielding performance and a flexible structure, has corrosion resistance and practicability and can be widely applied to the fields of intelligent electronics, wearable equipment, building protection and the like.

The invention provides a preparation method and application of a CoMn bimetal organic framework compound. Comprising the following steps: 1, adding 4, 4 '-dipyridyl and 3-(chloromethyl) benzoic acid into DMF (Dimethyl Formamide), dissolving, and filtering to obtain a product; drying the product in vacuum to obtain a precursor; step 2, dissolving the precursor, cobalt chloride hexahydrate and manganese chloride tetrahydrate in a mixed solvent for reaction to obtain an intermediate product; and step 3, cooling the reaction kettle to room temperature to obtain the bimetallic organic framework compound CoMn-MOF. The CoMn-MOF is of a bimetallic structure of metal Co and metal Mn, and CoMn-MOF is synthesized by selecting a long-chain ligand rich in chloride ions. The CoMn-MOF is rich in nitrogen reduction sites, can ionize chloride ions and has a bimetallic channel structure, the structure can provide a large number of active sites, the transmission rate of the chloride ions and more chloride ions, and the conductivity of the material is improved. According to the method, the specific capacity, the cycling stability and the high safety of the chloride ion battery are effectively improved.

The application discloses a treatment method of cobalt chloride raffinate, which comprises the steps of removing COD by oxidation, removing phosphorus, primary precipitation and secondary precipitation. The treatment method of cobalt chloride raffinate disclosed by the application fully utilizes by-product sodium hypochlorite in the production process, removes COD by using the strong oxidizing property of sodium hypochlorite in an acidic environment, fully recovers cobalt and nickel residues by using step-by-step precipitation, realizes the open circuit of magnesium, and reduces safety and production costs. Moreover, through detection, Co is completely removed after the raffinate is treated by the method disclosed by the application, the removal rate of Ni and Mg is greater than 99%, the removal rate of COD can reach about 80%, the removal rate of TP can reach more than 90%, and the discharge requirements are met.

The invention discloses a testing device for evaluating the water-blocking performance of water-blocking glue, and the device is characterized in that the device comprises a transparent cavity; cobalt chloride test paper is arranged in the transparent cavity; a cavity between the upper opening of the transparent cavity and the cobalt chloride test paper is filled with a fiber material; and the upper opening of the transparent cavity is sealed by a silica gel adhesive to be tested to form a sealing layer with the thickness of about 0.5-1cm. The invention further discloses a testing method of the device. According to the invention, the sample preparation of the to-be-tested silica gel adhesive is not limited, and the silica gel adhesive does not need to be prepared into a sheet-shaped sample meeting specific requirements. The water-blocking performance of the silica gel adhesive can still be accurately evaluated aiming at the silica gel adhesive which is difficult to prepare, is pasty, is in an irregular form and is inconvenient to prepare in the prior art, and the application range is wider.

This invention discloses a composite metal oxide electrode material, its preparation method, and a supercapacitor, belonging to the field of capacitor technology. The preparation method includes: dissolving cobalt chloride and trisodium citrate in deionized water to prepare solution A; dissolving potassium ferricyanide in deionized water to prepare solution B; adding solution B dropwise to solution A and allowing the reaction to proceed to obtain a CoHCF precursor; calcining the CoHCF precursor to obtain the composite metal oxide electrode material. This invention utilizes a Prussian blue analogue-derived composite metal oxide to effectively enhance the pseudocapacitive properties and cycle stability of the material. Trisodium citrate is used as a complexing agent to control the metal ion release rate, enabling cobalt and iron ions to form a more stable complex. Furthermore, this invention optimizes the electrochemical performance of the electrode material by adjusting the cobalt-iron ratio, the amount of trisodium citrate, additives, and calcination, thereby improving the specific capacitance, energy density, and cycle life of the supercapacitor.

The present invention discloses a Co / Bi4TaO8Cl type Fenton catalyst, a preparation method and an application. The steps of the catalyst preparation method are as follows: dispersing Bi4TaO8Cl material in water to obtain a first solution, ultrasonically treating the first solution to obtain a Bi4TaO8Cl dispersion; dripping a cobalt chloride solution into the Bi4TaO8Cl dispersion to obtain a second solution, stirring the second solution for a period of time, collecting the precipitate by centrifugation, washing, and drying to obtain a powder; calcining the obtained powder under the protection of an inert gas atmosphere to obtain a Co / Bi4TaO8Cl material. The Co / Bi4TaO8Cl type Fenton catalyst prepared by the present invention has the advantages of high efficiency, rapidity, and green economy. The inactivation efficiency of ARB can reach 100% within 10 minutes, and the degradation rate of ARG can reach 2.3min. ‑1 , with good resistance to environmental interference and cycle stability.

The utility model provides a solution impurity removal system which comprises an iron remover, a filter, a clear liquid tank, a preheater and an evaporation unit which are sequentially arranged, a solution is subjected to iron removal through the iron remover and then subjected to impurity removal through the filter, and clear liquid obtained after impurity removal enters the clear liquid tank. Clear liquid in the clear liquid tank enters the preheater to be preheated and then is conveyed to the evaporation unit to be evaporated and crystallized. Therefore, high-purity cobalt chloride can be obtained. Meanwhile, the solution impurity removal system further comprises a back flushing unit, when many impurities exist on a filter membrane in the filter, the preheated clear liquid can be conveyed to the filter through the back flushing unit to flush the filter membrane so as to remove the impurities on the filter membrane, so that flow reduction of the filter is avoided, the service life of the filter is prolonged, introduction of the impurities can be avoided, and the service life of the filter is prolonged. And the heated clear liquid is used for flushing, so that the flushing effect can be improved.

The invention relates to a slant culture medium of tylosin producing bacteria, which consists of the following components: 1.8 to 2.5 percent of insoluble starch, 0.15 to 0.25 percent of peptone, 0.003 to 0.01 percent of cobalt chloride, 0.05 to 0.1 percent of dipotassium phosphate, 0.1 to 0.2 percent of potassium nitrate, 0.02 to 0.07 percent of sodium chloride, 0.001 to 0.002 percent of ferrous sulfate, 0.05 to 0.1 percent of magnesium sulfate, 2.0 to 2.4 percent of agar strip and the balance of drinking water. The tylosin production strain slant culture medium prepared by using a new formula can enhance the environmental resistance of the strain, the strain still grows well under a wide humidity condition, and the fermentation titer of the tylosin is effectively improved by improving the quality and the quantity of spores and greatly shortening the slant culture period.

The utility model discloses a kind of concentrated tank cleaning device and electrodepositing cobalt production system, be configured in connecting concentrated tank, the inside hollow of concentrated tank, concentrated tank cleaning device includes: stirring assembly and cleaning component, stirring assembly includes stirring paddle and rotating shaft, stirring paddle is built into concentrated tank, rotating shaft is connected in stirring paddle, and with concentrated tank rotation connection, cleaning component includes at least one cleaning piece and driving part, cleaning piece is relatively set to the bottom inner wall of concentrated tank, driving part is connected in rotating shaft and cleaning piece, for driving cleaning piece to slide close to or away from bottom inner wall.The utility model can effectively solve the problem that the crystalline salt formed on the bottom inner wall of concentrated tank due to the high concentration of cobalt chloride by using conventional high-pressure water gun flushing, thereby leading to poor cleaning effect.

The invention relates to the technical field of sodium ion batteries, in particular to a preparation method of a sodium-cobalt chloride battery positive electrode material, the positive electrode material, a battery positive electrode and a battery. The preparation method of the sodium-cobalt chloride battery positive electrode material comprises the following steps: in the presence of a precipitant, carrying out a co-precipitation reaction on cobalt chloride and a sodium source in a solvent to obtain a precipitate; and drying the precipitate, and sintering in a nitrogen atmosphere to obtain the sodium-cobalt chloride battery positive electrode material. According to the sodium-cobalt chloride battery disclosed by the invention, by optimizing the preparation process of the positive electrode material, the problem of performance degradation of the battery at high temperature and in long circulation is solved, and excellent electrochemical performance and long service life are realized.

The application relates to the technical field of hard alloy, and particularly discloses a hard alloy material containing graphene oxide and a preparation method thereof, which comprises the following steps: S1, preparing graphene suspension aqueous solution, cobalt chloride aqueous solution and ammonium oxalate aqueous solution respectively; S2, mixing the graphene suspension aqueous solution and the cobalt chloride aqueous solution to obtain a GO / CoCl2.6H2O mixed aqueous solution, then adding the ammonium oxalate aqueous solution, uniformly mixing, heating and performing a hydrothermal reaction to obtain a GO / CoC2O4 precursor; S3, placing the GO / CoC2O4 precursor in a reducing atmosphere, heating and calcining to obtain a GO / Co composite powder; and S4, mixing and sintering the GO / Co composite powder and tungsten-carbon powder to obtain the hard alloy material. Through the hydrothermal reaction and the processing mode of high-heat reduction calcination, the graphene oxide is uniformly dispersed in cobalt powder and is made into a GO / Co composite powder, and then the GO / Co composite powder is compounded and sintered with the hard alloy powder, so that the problems of uneven dispersion and easy agglomeration of graphene in the hard alloy can be effectively solved.

To provide a polymer desiccant material that allows for good visual confirmation of moisture content. [Solution] The polymer desiccant material with cobalt chloride is manufactured by immersing the polymer desiccant material in a cobalt chloride solution with a cobalt chloride concentration of 2000 ppm to 10000 ppm for an immersion time of 5 minutes to 60 minutes.

The invention aims to provide a method for constructing Pt-CoNi LDH nanospheres on a foamed nickel (NF) substrate based on a corrosion-dispensing method, the foamed nickel substrate is corroded through cobalt chloride, abundant active sites are created, and in-situ growth of Pt atoms in the dispensing process is combined, so that uniform loading and high dispersion of the Pt-CoNi LDH nanospheres on the surface of foamed nickel are realized. The preparation method has the characteristics of greenness, environmental protection, low cost and simple and convenient process, the prepared Pt-CoNi LDH / NF nanospheres show excellent hydrogen evolution and urea oxidation activity under alkaline conditions, and a new thought is provided for the design of an efficient electrocatalyst.

The invention discloses a Co11 (HPO3) 8 (OH) 6 / Co9S8 nanotube composite electrode material and a preparation method thereof, and belongs to the technical field of functional material preparation. According to the method, cobalt chloride and sodium pyrophosphate are used as raw materials, water is used as a solvent, a Co11 (HPO3) 8 (OH) 6 nanowire is prepared through a hydrothermal method, and after the Co11 (HPO3) 8 (OH) 6 / Co9S8 nanotube is prepared after the Co11 (HPO3) 8 (OH) 6 / Co9S8 nanowire is vulcanized. The Co11 (HPO3) 8 (OH) 6 / Co9S8 nanotube is applied to a supercapacitor as an electrode material, and has relatively good electrochemical energy storage performance. When the current density is 4.0 A g <-1 >, 6.0 A g <-1 >, 10 A g <-1 >, 15 A g <-1 > and 20 A g <-1 >, the capacitance is 1218 F g <-1 >, 1098.3 F g <-1 >, 1022 F g <-1 >, 918.8 F g And under 10A g <-1 >, after 10000 charge-discharge cycles, the capacitance of the material can still reach 920F g <-1 >. The method is easy to operate and implement, low in cost, high in yield and good in reproducibility, and has a good application prospect in supercapacitor devices.