54 results about "Cobalt phosphide" patented technology

A catalytic electrode includes a nickel-based porous base material, and a plurality of catalytic alloy balls of nickel and another metal doped with elements, in which the another metal includes iron, the elements include C, F, and S, and the catalytic alloy balls are dispersed on the surface of the nickel-based porous base material. The catalytic electrode also includes a plurality of metal phosphide particles covering the nickel-based porous base material and the catalytic alloy balls, and the metal phosphide particle includes nickel phosphide, nickel iron phosphide, nickel cobalt phosphide, nickel copper phosphide, or nickel zinc phosphide.

The invention provides a bifunctional electrocatalyst, a preparation method thereof and a hydrogen production method, and relates to the field of catalysts. The bifunctional electrocatalyst comprises a conductive substrate and a core-shell type nano array structure vertically growing on the surface of the conductive substrate, a core in the core-shell type nano array structure comprises a tungsten-doped nickel-iron layered bimetal hydroxide nanosheet array, and a shell comprises cobalt phosphide. The bifunctional electrocatalyst shows excellent catalytic performance and stability in oxygen evolution and hydrogen evolution reactions, and has important application value in the field of electrocatalytic water decomposition.

The invention provides a Ru-NiCoP / NF self-supporting electrode and a preparation method and application thereof. According to the Ru-NiCoP / NF self-supporting electrode, foamed nickel serves as a matrix, ruthenium-doped nickel phosphide cobalt loaded on the foamed nickel serves as an active component, the ruthenium-doped nickel phosphide cobalt is of a three-dimensional composite nanostructure with a sea urchin-shaped morphology, Ru in the ruthenium-doped nickel phosphide cobalt contains two valence states of Ru < 3 + > and Ru0, Ni exists in the valence state of Ni < 2 + >, and Co contains two valence states of Co < 2 + > and Co < 3 + >. The Ru-NiCoP / NF self-supporting electrode has good catalytic activity in the hydrogen evolution reaction and oxygen evolution reaction process, and can be used for electrolyzing water.

This invention discloses a platinum-cobalt phosphate catalyst for the selective electrooxidation of ethylene glycol to glycolic acid, its preparation method, and its application. The preparation method includes: S1, pretreating nickel foam (NF); S2, dissolving disodium hydrogen phosphate dodecahydrate and hexadecyltrimethylammonium bromide in a mixture of water and ethylene glycol, adding cobalt nitrate and stirring to obtain a precursor; S3, immersing the nickel foam in the precursor solution and refrigerating it overnight at low temperature; S4, transferring it to a reaction vessel and hydrothermally heating it at 160 °C for 10 hours to obtain cobalt phosphate (CoPO / NF); S5, using CoPO / NF as the working electrode, electrochemically depositing platinum in an H2PtCl6 and KOH electrolyte using cyclic voltammetry; S6, washing and vacuum drying to obtain the final product. This invention is the first to prepare a platinum-cobalt phosphate catalyst for the selective electrooxidation of ethylene glycol to glycolic acid at 100 mA cm⁻¹. ‑2 With a working potential of only 0.67 V at current density (relative to RHE) and a Faraday efficiency of 100% for glycolic acid, it has significant advantages and application potential in the highly selective production of glycolic acid in the electro-oxidation reaction of ethylene glycol.

The invention discloses a composite electrocatalyst based on polyurethane foam, a preparation method and a battery. The composite electrocatalyst is nitrogen and sulfur co-doped carbon foam loaded with cobalt hydroxide nanosheets and CoP, and the specific surface area of the carbon foam is 186-211m < 2 > / g; the carbon foam is obtained by calcining a polyurethane foam-based transition metal composite material in an inert atmosphere at the temperature of 700-750 DEG C. According to the present invention, the cobalt hydroxide nanosheet and the cobalt phosphide are loaded so as to provide the rich self-supporting pore structure, such that the specific surface area of the electrocatalyst can be easily increased, and the cobalt hydroxide nanosheet and the cobalt phosphide are loaded so as to provide the rich adsorption site for the oxygen. Through co-doping of nitrogen and sulfur, the active sites of the electrocatalyst are further increased, and the kinetic efficiency of oxygen reduction reaction is improved. Moreover, in the oxygen reduction reaction process, the composite electrocatalyst is not prone to agglomeration, active substance falling and other problems, and therefore the circulation capacity of the oxygen reduction reaction can be improved.

The application provides a cobalt phosphide water electrolysis catalyst and a preparation method thereof, and the preparation method comprises the following steps: (1) soaking foam nickel in a polyvinylpyrrolidone solution, and obtaining modified foam nickel after reaction; (2) mixing a cobalt nitrate hexahydrate solution and a 2-methylimidazole solution to obtain a mixed solution, adding the modified foam nickel into the mixed solution, and obtaining a metal organic framework ZIF-67@foam nickel material after reaction; (3) carrying out a separated gas phosphorization reaction on the metal organic framework ZIF-67@foam nickel material under a nitrogen atmosphere, and obtaining the cobalt phosphide water electrolysis catalyst. The cobalt phosphide catalyst prepared in the application has a high specific surface area and porosity, is beneficial to the exposure of active sites, and has excellent water electrolysis catalytic performance.

The invention belongs to the technical field of nano material synthesis, and relates to an iron-doped cobalt phosphide hollow nanocage hydrogen evolution catalyst and a preparation method thereof. The catalyst is a composite porous material of Fe-doped CoP nano-particles and nitrogen-doped carbon, and the Fe-doped CoP nano-particles coated with the nitrogen-doped carbon are uniformly loaded on dodecahedral porous nitrogen-doped carbon with the size of 200nm microcosmically. The preparation method comprises the following three steps: (1) reacting cobalt nitrate hexahydrate with 2-methylimidazole in methanol at room temperature, and centrifuging to obtain a ZIF-67 precursor; (2) performing oil bath reflux on ZIF-67 and potassium ferricyanide in ethanol-deionized water, and performing centrifugal drying to obtain a CoFe-PBAs precursor; and (3) annealing CoFe-PBAs for 2 hours at 400 DEG C under the protection of argon, thereby obtaining the target catalyst. The catalyst is excellent in hydrogen evolution activity in a whole pH range, 0.01 Acm <-2 > overpotentials in an acidic system, an alkaline system and a neutral system are 61mV, 133mV and 188mV respectively, only 1.91 V is needed for realizing 1.0 Acm <-2 > current density in a proton exchange membrane electrolytic cell, and the 200-hour operation voltage attenuation rate is as low as 0.1 mVh <-1 >. The method is simple in preparation process, low in cost, outstanding in catalyst activity and stability and suitable for industrial green hydrogen preparation scenes.

The application provides a composite lithium negative electrode material for a solid-state lithium metal battery and a preparation method and application thereof, the preparation raw material of the composite lithium negative electrode material comprises an additive, lithium metal and a solid-state electrolyte; the additive is selected from one or more of gallium phosphide, indium phosphide, tin phosphide, iron phosphide, cobalt phosphide, nickel phosphide, molybdenum phosphide, manganese phosphide, black phosphorus and red phosphorus. The composite lithium negative electrode material prepared by using the additive has good wettability to the solid-state electrolyte sheet, significantly reduces the interface resistance between the solid-state electrolyte and the lithium metal negative electrode, improves the critical current density and the cycle stability, is very close to the solid-state electrolyte sheet at the interface, has good matching with a commercial lithium iron phosphate positive electrode, and the assembled full battery has excellent rate performance and cycle performance.

The present application relates to a kind of load CoP / Bi4TaO8Cl composite material, the composite material is made of layered Bi4TaO8Cl and cobalt phosphide nanoparticles composite, the layered Bi4TaO8Cl is carrier, the cobalt phosphide nanoparticles are loaded on the surface of carrier, form CoP / Bi4TaO8Cl heterojunction structure.Compared with the prior art, the present application selects Cl ‑ Based Bi4TaO8Cl as carrier.Compared with Br ‑ , Cl ‑ With stronger electronegativity, and Ta 5+ , Bi 3+ In the lattice, it is more firmly combined, so as to give the carrier higher structural stability.More importantly, this change makes Bi4TaO8Cl have more positive potential valence band top, and the photo-generated hole has stronger oxidation ability, and provides more sufficient and fundamental driving force for high-energy barrier water oxidation reaction (OER) in thermodynamics.

This disclosure provides systems, methods, and apparatus related to lithium-ion batteries. In one aspect, a method includes synthesizing an intermediate selected from a group of a nickel-manganese-cobalt nitrate, a nickel-manganese-cobalt acetate, a nickel-manganese-cobalt sulfate, a nickel-manganese-cobalt chloride, and a nickel-manganese-cobalt phosphate. The intermediate is mixed with a lithium salt selected from a group of LiOH, LiCl, LiNO3, LiSO4, LiF, LiBr, Li3PO4, Li2CO3, and combinations thereof to form a mixture. The mixture is annealed at a sequence of temperatures and times to form a plurality of single crystals of a lithium nickel-manganese-cobalt oxide, with no cooling of the mixture between operations of the sequence of temperatures and times.

The invention relates to the technical field of nano material preparation, in particular to a technological process for preparing nano CoP, which comprises the following steps: selecting cobalt powder with the particle size of about 20nm and red phosphorus powder with the particle size of about 30m, accurately weighing the nano cobalt powder and the red phosphorus powder according to the molar ratio of 1: 1 by using a precision electronic balance in a vacuum glove box, and uniformly mixing the nano cobalt powder and the red phosphorus powder; the glove box provides an oxygen-free environment to prevent raw materials from being oxidized, in the vacuum glove box, a proper stirring tool is used for evenly mixing the weighed nanometer cobalt powder and red phosphorus powder, and the stirring speed and time are controlled in the mixing process; sealing the mixed powder in a glove box into a metal tube, heating the metal tube in a tubular furnace to 700-1000K in an inert atmosphere, and keeping the temperature for 2 hours; finally, a sample is taken out after the temperature is reduced to the room temperature, grinding is conducted, and cobalt phosphide particles of 20-50 nm are obtained.The preparation technology and the application method of the nanometer CoP are provided, the technological process is simple, and the prepared nanometer CoP particles are small and high in catalytic performance.

The application relates to a cobalt phosphide nanomaterial loaded with iron monatomic atoms and a preparation method and application thereof, and relates to a phosphide catalyst and a preparation method and application thereof. The cobalt phosphide nanomaterial loaded with iron monatomic atoms is a nanowire composed of regular-shaped polycrystal particles, the nanowire is dozens of microns long, and the width is 100nm-500nm; the nanomaterial has a single-phase crystal structure, is composed of Fe, Co, P and C four elements, is Fe monatomic atom doped CoP wrapped by a carbon layer, Fe and Co atoms form an octahedral configuration of six coordination with P atoms; the material contains rich phosphorus vacancy defects. The method comprises the following steps: one, preparing a precursor; two, carbonizing; three, phosphorizing. The cobalt phosphide nanomaterial loaded with iron monatomic atoms is used for electrocatalysis, environmental remediation or energy conversion. The cobalt phosphide nanomaterial loaded with iron monatomic atoms prepared by the application has a clever preparation process, simple and easy operation, excellent performance and is favorable for commercial production.

The application discloses a superfine cobalt phosphide nanocluster / carbon composite catalyst, a supported catalyst and a preparation method and application thereof, and belongs to the field of liquid hydrogen storage and nanometer catalyst preparation. A mild low-temperature 300-400 DEG C in-situ heat treatment strategy is adopted, so that the growth and agglomeration of metal nanometer particles under high temperature are avoided. The average size of the prepared superfine cobalt phosphide nanocluster can reach 4.40+ / -1.3 nm, the extremely small size provides a larger electrochemical active specific surface area, and catalytic active sites are fully exposed. Under the condition of 30 DEG C, the catalyst shows super-high catalytic activity for ammonia borane hydrolysis, and the conversion efficiency TOF is as high as 1188 h ‑1 , and the performance is far higher than that of most reported non-noble metal catalysts.

The invention belongs to the technical field of functional materials, and particularly relates to a three-dimensional hydrophilic electrode material and a preparation method and application thereof. Firstly, a cobalt phosphide nanowire array is obtained on a foamed nickel substrate through hydrothermal and phosphating reactions, then ZIF-67 is grown on the nanowire array, and the cobalt nitrogen carbon / cobalt phosphide / foamed nickel three-dimensional electrode material is obtained after high-temperature carbonization. The electrode material shows excellent hydrophilic property and hydrogen evolution and urea electrooxidation properties. Compared with the prior art, the electrode has the advantages that the electrolysis potential is greatly reduced in urea-assisted seawater electrolysis hydrogen production, the chlorine oxidation reaction is avoided, the electrolysis efficiency is improved, and the development of an efficient chlorine-free seawater electrolysis hydrogen production technology is favorably promoted.

The application belongs to the field of wastewater treatment, and particularly relates to a bivalent cobalt phosphide / TiO2 nanotaper@Ti composite electrode and a preparation method and application thereof in organic matter-heavy metal coupling photoelectric catalysis. The bivalent cobalt phosphide / TiO2 nanotaper@Ti composite electrode comprises a titanium substrate, a titanium dioxide nanotaper layer grown in situ on the surface of the titanium substrate, and a bivalent cobalt phosphide nanosheet layer grown on the surface of the titanium dioxide nanotaper layer. The bivalent cobalt phosphide comprises divalent cobalt phosphide and trivalent cobalt phosphide, wherein the percentage of divalent cobalt in the total cobalt atoms is 70-90%. A p-n heterojunction exists between the titanium dioxide nanotaper and the bivalent cobalt phosphide. The bivalent cobalt phosphide / TiO2 nanotaper@Ti composite electrode can improve the synergistic coupling photoelectric degradation effect of organic matter and heavy metals.

The application provides a high-activity catalyst for electrolysis of water to produce hydrogen and a preparation method and application thereof. Specifically, the catalyst for electrolysis of water to produce hydrogen comprises a carbon sintered body carrier and an active component loaded on the surface and inside of the carbon sintered body carrier, wherein the active component comprises nickel molybdenum nitride (NiMoN), cobalt phosphide (CoP) and cerium oxide, and the catalyst has a porous structure. The catalyst according to the application is low in cost, high in activity and good in stability, can effectively reduce the cost of electrolysis of water to produce hydrogen, and improves the hydrogen production efficiency.

A work machine (100), such as a conveyor at a mining site, includes a conductor bar (106) housing concentric metal tubes (222, 234) for receiving power from a contactor (118) sliding on a power rail (108). Electrical connectivity between conductors (between concentric metal tubes (222, 234)) within the conductor rod (106) is provided using a conductive liquid. The corrosion barrier layer (302, 304) is used to protect the concentric metal tube (222, 234) from corrosion caused by contact with the conductive liquid. The corrosion barrier layer (302, 304) is electroplated and includes nickel phosphide and / or cobalt phosphide to maintain an electrical connection between the conductors while protecting the conductors from corrosion.

The invention discloses a preparation method and application of a cobalt phosphide electrocatalyst with an adjustable interface water-hydrogen bond network, and belongs to the field of electrocatalytic materials. Cobalt nitrate, variable valence metal chlorine salt and urea are used as raw materials to synthesize a hydroxide precursor, and after simple low-temperature phosphating reaction treatment, in-situ oxidation reconstruction is carried out in the water electrolysis oxygen evolution reaction process to prepare the cobalt hydroxide. The preparation method disclosed by the invention has the advantages of simplicity in operation, high efficiency, environmental friendliness, strong controllability, low cost and the like; and the prepared cobalt phosphide oxygen evolution electrocatalyst has the advantages of adjustability of an interface water-hydrogen bond network, high stability, excellent oxygen evolution activity and the like.

The application discloses an electrocatalyst and a preparation method and application thereof, and belongs to the field of electrocatalysts. The electrocatalyst comprises a conductive substrate and an active component; the active component is loaded on the surface of the conductive substrate; the structural formula of the active component is CeFe-LDH@F-NiCoP; F-NiCoP is fluorine-doped nickel-cobalt phosphide, and CeFe-LDH is cerium-iron layered double hydroxide; the F-NiCoP in the active component is in-situ grown on the surface of the conductive substrate in the form of a two-dimensional nanosheet array, and the CeFe-LDH nanoparticles in the active component are grown on the surface of the F-NiCoP two-dimensional nanosheet to form a three-dimensional heterostructure of the active component. The three-dimensional heterostructure electrocatalyst prepared by the application has rich catalytic active sites and excellent oxygen evolution catalytic activity, and exhibits excellent durability under alkaline large-current conditions, which is of great significance to promoting the development of green and clean energy.

The invention discloses a method for preparing a catalyst by preparing layered porous metal oxide to adsorb hydrogen phosphide, and belongs to the technical field of electro-catalytic materials. Comprising the following steps: S1, preparing a nickel source precursor or a cobalt source precursor from a nickel source or a cobalt source; and S2, putting the nickel source precursor or the cobalt source precursor into a quartz tube, putting the quartz tube into a tubular furnace, and introducing hydrogen phosphide to prepare the electrocatalyst containing Ni < x > < 1 > Py1 or Co < x > < 2 > Py2. The layered porous metal oxide prepared by the method is different from common metal oxide due to the excellent structure, so that efficient adsorption of phosphine gas can be realized; and the formed layered porous metal nickel phosphide and cobalt phosphide materials have a wide application prospect in the field of hydrogen production by electro-catalytic water decomposition due to the structural advantages of the layered porous metal nickel phosphide and cobalt phosphide materials.

A catalyst electrode and a method of forming the same and an electrolysis device are disclosed. The catalyst electrode includes a nickel-based porous substrate; a plurality of catalyst alloy spheres of nickel and other metals, doped with a plurality of elements, the other metals including iron, and the elements including C, F, and S, and the catalyst alloy spheres being dispersed on a surface of the nickel-based porous substrate; and a plurality of metal phosphide particles coated on the nickel-based porous substrate and the catalyst alloy spheres, and the metal phosphide particles including nickel phosphide, nickel iron phosphide, nickel cobalt phosphide, nickel copper phosphide, or nickel zinc phosphide.

A working machine (100), such as a tractor at a mining site, includes a conductor bar (106) that connects concentric metal tubes (222, 234) for receiving electrical power from a contactor (118) sliding on a busbar (108). The electrical connection between the conductors within the conductor bar (106), between the concentric metal tubes (222, 234), is established using a conductive fluid. Corrosion barriers (302, 304) are used to protect the concentric metal tubes (222, 234) from corrosion caused by contact with the conductive fluid. The corrosion barriers (302, 304) are electroplated and comprise nickel phosphide and / or cobalt phosphide to maintain the electrical connection between the conductors while protecting the conductors from corrosion.

A work machine, such as a hauler at a mining site, includes a conductor rod housing concentric metal tubes for receiving electrical power from a contactor sliding on a power rail. Electrical connectivity between conductors within the conductor rod, between the concentric metal tubes, are provided using a conductive liquid. Corrosion barriers are used to protect the concentric metal tubes from corrosion resulting from contact with the conductive liquid. The corrosion barriers are electroplated and include nickel phosphide and / or cobalt phosphide to maintain the electrical connectivity between the conductors, while protecting the conductors from corrosion.

The invention belongs to the technical field of hydrogen evolution electrodes, and discloses a hydrogen evolution electrode material with high catalytic activity and a preparation method and application thereof, and the preparation method comprises the following steps: step 1, cleaning foamed nickel; step 2, preparing a tungsten-iron-chromium co-doped hydroxyl cobalt fluoride / foamed nickel precursor WFeCrCo (OH) F / NF on the foamed nickel through a hydrothermal method; 3, the WFeCrCo (OH) F / NF obtained in the step 2 and sodium hypophosphite powder are placed at two different positions of a ceramic boat respectively, the sodium hypophosphite powder is located on the upstream side of a tubular furnace, heat preservation is conducted in a protective gas environment, then the temperature is naturally cooled to the room temperature, and the tungsten-iron-chromium co-doped cobalt phosphide composite electrode material WFeCr-CoP / NF is obtained. Through synergistic doping of three elements of tungsten, iron and chromium, the catalytic activity of the nickel-based hydrogen evolution electrode material is improved.

This invention relates to the application of cobalt phosphide in the preparation of anti-inflammatory drugs, specifically in the field of pharmaceutical formulation. The cobalt phosphide possesses enzyme-like catalytic activities similar to peroxidase (POD), catalase (CAT), and superoxide dismutase (SOD), as well as the ability to scavenge hydroxyl radicals (·OH), making it a broad-spectrum ROS scavenger capable of alleviating inflammation-related diseases. Furthermore, due to its excellent photothermal properties, it can achieve antibacterial effects at inflamed wound sites, and its enhanced catalytic activity through thermal effects and the promotion of tissue wound healing through oxygen generation provide a new direction for developing novel nanomedicines with high ROS scavenging capabilities for the treatment of inflammation, particularly psoriasis.

The invention provides a cobalt phosphide nano-catalyst as well as a preparation method and application thereof. The cobalt phosphide nano-catalyst is prepared by the following method: dissolving cobalt nitrate hexahydrate in water to obtain a precursor solution of cobalt nitrate; dissolving oxalic acid dihydrate in alcohol to obtain an alcoholic solution of oxalic acid; dropwise adding an alcoholic solution of oxalic acid into the precursor solution of cobalt nitrate, reacting to generate cobalt oxalate precipitate, and continuously stirring for a period of time; centrifuging, drying and crushing to obtain CoC2O4 powder; coC2O4 powder and sodium hypophosphite are mixed and put into a porcelain boat, the porcelain boat is put into a tubular furnace, N2 is introduced, and heating and heat preservation are conducted; and after the tubular furnace is cooled to room temperature, taking out solids in the porcelain boat, washing, centrifuging and drying to obtain the cobalt phosphide nano-catalyst. The catalyst has a high specific surface area, an ideal nano structure and abundant active sites, has excellent hydrogen evolution activity, and has good application prospects and large-scale popularization potential in the field of hydrogen production by electrolysis of water.

The application discloses a nickel-cobalt phosphide catalytic electrode which can be used for glycerol oxidation and a preparation method and application thereof, and belongs to the technical field of electrocatalysis. The preparation method comprises the following steps: S1, adding nickel salt, cobalt salt, ammonium fluoride and urea into water and stirring until they are uniformly mixed, and then performing a hydrothermal reaction on the mixture with a foamed nickel substrate to obtain a nickel-cobalt bimetallic hydroxide precursor loaded on the foamed nickel; and S2, placing the nickel-cobalt bimetallic hydroxide precursor loaded on the foamed nickel and sodium hypophosphite in an inert atmosphere and performing a low-temperature phosphorization treatment, and thus the nickel-cobalt phosphide catalytic electrode is obtained. The preparation method is low in cost and easy to operate, and the prepared nickel-cobalt phosphide catalytic electrode can be used as a bifunctional catalyst and has excellent HER and GOR catalytic activities, so that glycerol assisted hydrogen production can be realized at a low voltage, and the effective combination of energy conversion and high-value chemical production is realized.

The invention provides an oxygen evolution self-supporting electrode material and a preparation method and application thereof. The oxygen evolution self-supporting electrode material comprises a foamed nickel (NF) substrate and a carbon-coated iron-doped nickel phosphide cobalt active layer (C (at) NiCoP-Fe) grown on the surface of the foamed nickel substrate in situ, the active layer is formed by phosphating a metal organic framework derivative and contains carbon, iron, nickel, cobalt and phosphorus elements. The carbon-coated iron-doped nickel cobalt phosphide self-supporting electrode (C (at) NiCoP-Fe / NF) is successfully synthesized through a metal organic framework (MOF) precursor template method, and the technical bottlenecks that active sites of traditional transition metal phosphide are not fully exposed, the intrinsic activity is low, agglomeration is prone to occurring in the reaction process and the like are effectively overcome. And the finally prepared electrode material has the characteristics of high active surface area, excellent catalytic activity and long-term stability, rapid electron transmission capability and uniform structure, and has a wide application prospect.

The invention belongs to the technical field of electro-catalytic materials, and particularly relates to a preparation method and application of a vanadium-doped cobalt phosphide heterogeneous composite material. The preparation method comprises the following steps: firstly, growing a ZIF-67 precursor on carbon cloth by an impregnation method to obtain ZIF-67 / CC; then, the ZIF-67 / CC is soaked in a sodium metavanadate solution for etching, and a Co3V2O8 / CC intermediate is formed; the vanadium-doped cobalt phosphide heterogeneous composite material has excellent electro-catalysis oxygen evolution performance and good full water decomposition performance under the alkaline condition, shows excellent conductivity and good stability, can be used as an excellent catalyst for electro-catalysis oxygen evolution reaction, and has good application prospects. The preparation method has certain practical application potential, and is simple, short in process and convenient for commercial popularization.

The invention discloses a preparation method of a lithium ion battery negative electrode material, the negative electrode material and application of the negative electrode material, and the preparation method comprises the following steps: dissolving sodium citrate and a nickel source compound in deionized water, and stirring to form a first solution; dissolving sodium citrate and a cobalt source compound in deionized water, and stirring to form a second solution; mixing the first solution and the second solution, stirring, standing, separating and drying to obtain a precursor; carrying out annealing treatment on the precursor in an inert atmosphere to prepare a nickel-cobalt modified nano carbon skeleton; and carrying out gas-phase phosphating reaction on the nickel-cobalt modified nano carbon skeleton and a phosphorus source in an inert atmosphere to obtain the cobalt phosphide / nickel phosphide nano carbon negative electrode material. According to the scheme, the cobalt phosphide / nickel phosphide nanometer carbon negative electrode material prepared by a three-step method of coordination assembly, pyrolysis carbon formation and gas phase phosphorization has high specific capacity and excellent cycle stability, the preparation process is environment-friendly, and the process is controllable.