189 results about "Molybdenum carbide" patented technology

The invention belongs to the technical field of catalysts, and particularly relates to a supported Co-based catalyst with a nano molybdenum carbide auxiliary as well as a preparation method and application of the supported Co-based catalyst. The preparation method comprises the following steps: depositing molybdenum oxide on the surface of a carrier material by adopting an atomic layer deposition method, then carrying out carburizing treatment to obtain a molybdenum carbide catalyst, depositing cobalt oxide on the surface of the molybdenum carbide catalyst by adopting the atomic layer deposition method, and then carrying out reduction treatment to obtain the supported cobalt-based catalyst with the nano molybdenum carbide assistant. According to the preparation method provided by the invention, the size of molybdenum carbide and the dispersity and valence state of cobalt are controlled by regulating and controlling the deposition times of molybdenum oxide, and the prepared catalyst has excellent catalytic activity and stability in the hydroformylation reaction of long-chain olefin with the carbon atom number being greater than or equal to 5.

This invention belongs to the field of catalytic material preparation technology, specifically relating to a method for preparing high specific surface area pure phase α-type molybdenum carbide by hydrogen intercalation modification of MoO3 and its application, including the following steps: (1) adding MoO3 powder to hydrochloric acid and dispersing it to prepare a mixture of MoO3 and hydrochloric acid; (2) adding metal powder to the mixture in step (1) and performing pre-reduction treatment by in-situ hydrogenation of the metal and hydrochloric acid to prepare H x MoO3 precursor; (3) H prepared in step (2) x The MoO3 precursor is carbonized under a carbon source gas to obtain a pure α-type molybdenum carbide with a high specific surface area. This method is simple and effective, avoids the use of corrosive NH3 gas during carbonization, and does not require a metal as a medium, thus solving the current problem of not being able to prepare metal-free modified pure α-MoC in one step.

Molybdenum(0) coordination complexes comprising ligands which each coordinate to the metal center by nitrogen or phosphorous are described. Methods for depositing molybdenum-containing films on a substrate are described. The substrate is exposed to a molybdenum precursor and a reactant to form the molybdenum-containing film (e.g., elemental molybdenum, molybdenum oxide, molybdenum carbide, molybdenum silicide, molybdenum nitride). The exposures can be sequential or simultaneous.

The invention discloses a high-dispersion and small-particle-size alpha-MoC1-x / SiO2 catalyst as well as a preparation method and application thereof. The catalyst is composed of alpha-MoC1-x nanoparticles dispersed on a silicon dioxide carrier, the alpha-MoC1-x / SiO2 catalyst is generated in a three-dimensional SiO2 confined network in a limited manner, wherein the three-dimensional SiO2 confined network is constructed by in-situ polycondensation of silica sol under the condition that the pH value is 2.3-2.8, and the molybdenum content is 30-60%; the average particle size of the alpha-MoC < 1-x > nanoparticles is 1.0-2.2 nm, and the alpha-MoC < 1-x > nanoparticles are highly dispersed in the SiO2 confinement structure; the alpha-MoC1-x nano-particles are face-centered cubic phase molybdenum carbide, and the mass fraction of the face-centered cubic phase molybdenum carbide is larger than or equal to 90 wt%. The alpha-MoC1-x / SiO2 obtained by the invention can realize higher methanol selectivity and intrinsic activity under the condition of 140-180 DEG C, and can stably operate for 100 hours. The invention provides a novel small-particle-size and high-dispersion molybdenum carbide catalytic material and a preparation strategy thereof for preparing methanol through low-temperature and high-selectivity CO2 hydrogenation.

The application provides a preparation method and application of a molybdenum carbide loaded jute derived porous carbon material, and belongs to the technical field of electrochemical catalysis. The preparation method comprises the following steps: pretreating jute fibers to obtain jute powder; placing the jute powder in a molybdenum compound containing solution to obtain a mixture, the jute powder in the mixture adsorbing the molybdenum compound, and the mass ratio of the jute powder to the molybdenum compound in the molybdenum compound containing solution being any value in 1:(2.5-6.25); and carbonizing the jute powder adsorbing the molybdenum compound at 800-900 DEG C to obtain the molybdenum carbide loaded jute derived porous carbon material. The jute fiber derived porous carbon is used as a carrier, and the precursor is fully adsorbed and combined in the molybdenum compound containing solution. By adjusting the mass ratio and the carbonization temperature, the highly dispersed and stably loaded molybdenum carbide is realized, the structural stability and catalytic activity of the molybdenum carbide based catalyst are improved, and the catalytic efficiency of the hydrogen evolution reaction is further improved.

The invention belongs to the technical field of a preparation method of a multi-component composite catalyst, and discloses a preparation method of a nickel-doped molybdenum carbide composite perovskite catalyst, which comprises the following steps: maintaining a constant high-temperature condition in a single reactor, continuously executing minute-level instantaneous gas phase pulse according to a preset time sequence, according to the method, deposition in-situ instantaneous carbonization of molybdenum-containing species and deposition of nickel-containing species are sequentially completed, and finally rapid cooling is carried out. Separation of process time is utilized to cope with migration and agglomeration trends generated by thermodynamic driving of all solid-phase components at continuous high temperature; the formation of the microstructure of the catalyst is controlled by the time sequence of the gas phase pulse instead of a single temperature field, so that the high dispersion state of the active component can be locked and stored by a dynamic process in a necessary high-temperature reaction environment.

The application belongs to the technical field of catalysts, and relates to a supported molybdenum carbide catalyst, which comprises a carrier and an active component; the carrier is MY molecular sieve, and the active component is molybdenum carbide; M is one or two of Co, Ni and Cu. A preparation method thereof is also disclosed, in which a molybdenum source solution is mixed with MY molecular sieve, dried, calcined, and then carbonized in a reducing mixed gas atmosphere to obtain the supported molybdenum carbide catalyst. The Y molecular sieve has good hydrothermal stability, a typical microporous structure, a large specific surface area, and can better disperse the active substance, so that more active components are exposed on the surface and participate in the reaction, and at the same time, smaller and more dispersed metal particles are obtained, which can effectively avoid the contact between the metal particles and the molybdenum carbide; on the other hand, the metal M is beneficial to H2 activation, improves the H2 dissociation capacity, and is helpful to remove the hydroxyl groups remaining on the surface of the molybdenum carbide during the reaction.

The invention relates to a molybdenum carbide-based catalyst for hydrogen production by methanol reforming and a preparation method and application thereof, the molybdenum carbide-based catalyst is CCu / MoC, Cu / MoO3 is used as a precursor, and activated carbon is doped to prepare the molybdenum carbide-based catalyst; in the molybdenum carbide-based catalyst, a metal component Cu loaded on alpha-MoC is a main active component; the preparation method comprises the following steps: roasting molybdenum metal oxide to obtain MoO3; adding a copper metal compound into MoO3, grinding, further drying, and roasting to obtain a Cu / MoO3 catalyst precursor; and uniformly mixing the Cu / MoO3 catalyst precursor with the modified activated carbon, reducing, carbonizing and passivating to obtain a CCu / MoC catalyst, namely the molybdenum carbide-based catalyst. Compared with the prior art, the preparation method has the advantages that the formation of an alpha-MoC crystal phase in the carbonization process of the molybdenum carbide-based catalyst can be effectively promoted, and the dispersion degree of active components on the surface of the carrier is greatly improved, so that the catalyst has good low-temperature activity and hydrogen production efficiency, and meanwhile, the catalyst also has good stability and relatively low CO selectivity.

The application discloses a biomass-based nitrogen-doped carbon-carbide molybdenum composite catalyst and a preparation method and application thereof, and is characterized in that: a widely-sourced biomass, especially agricultural biomass waste, is used as a carbon and nitrogen source, ammonium molybdate is used as a molybdenum source, and a nitrogen-doped carbon-carbide molybdenum composite catalyst is prepared through one-step pyrolysis under an ammonia atmosphere; the catalyst is mesoporous nitrogen-doped carbon loaded with pure beta-phase carbide molybdenum, has the characteristics of a large pore size, high dispersion of beta-phase carbide molybdenum and the like, and has good thermal stability; the catalyst can efficiently denitrogenate quinoline and directively convert the quinoline, and high-selectivity aromatic hydrocarbon products can be obtained; the conversion rate is not less than 99%, the denitrogenation rate is not less than 99%, the selectivity of aromatic compounds is not less than 86%, and the catalyst has the characteristics of low hydrogen consumption due to the avoidance of hydrogen saturation reaction.

The present invention relates to a method for preparing a fluorine-doped Mo₂C nanocatalyst on a nitrogen-carbon nanosheet. This method uses a simple two-step pyrolysis method. First, two molybdenum sources are introduced, and MoO₃: ammonium molybdate = 1: (2-2.5). Then, ammonium fluoride (NH₄F) and molybdenum-dopamine (Mo-PDA) are uniformly mixed by solid-phase grinding. After calcination, the anion fluorine is doped into molybdenum carbide and modifies it, and then the fluorine-doped Mo₂C nanocatalyst on the nitrogen-carbon nanosheet can be obtained. The catalyst obtained by the present invention has higher catalytic activity, cyclic stability and hydrogen production efficiency in the reaction of electrolyzing water under alkaline conditions, and has the advantages of simple synthesis process, simple operation and short synthesis cycle.

The invention discloses a hydrogenation catalyst as well as a preparation method and application thereof. The hydrogenation catalyst comprises a carrier and active metal components, the carrier is a core-shell carrier, a core layer is alumina, a shell layer is alumina containing molybdenum carbide, and the active metal components comprise at least one of VIII group metal oxides and at least one of VIB group metal oxides. The catalyst can be used for hydrogenation of heavy oil, residual oil and the like, is especially suitable for a residual oil hydrogenation process, and realizes efficient hydrogenation.

The invention belongs to the technical field of lubricating oil, and particularly relates to an internal combustion engine oil composite additive and a preparation method and application thereof. The internal combustion engine oil composite additive is prepared from the following raw materials in percentage by mass: 5 to 25 percent of sulfonate, 5 to 12.5 percent of an oxidation and corrosion inhibitor, 5 to 12.5 percent of an anti-wear agent, 5 to 10 percent of an antioxidant, 1 to 2.5 percent of heptadecenyl imidazoline succinate, 0.5 to 1 percent of a nano compound and the balance of a dispersing agent, the nano compound is a compound of nano molybdenum carbide and nano aluminum oxide. Lubricating oil adopting the internal combustion engine oil composite additive has good wear resistance, water resistance and corrosion resistance, meanwhile, good low-temperature fluidity and low loss, oxidative deterioration of engine oil and generation of sediments can be effectively inhibited, the low-speed preignition frequency of an engine can be reduced, and the service life of the engine oil is prolonged. Timing chain abrasion protection and valve system abrasion protection are provided for an engine.

The invention relates to the technical field of semiconductor materials, and particularly discloses a flexible flow guide ring, a preparation method and a silicon carbide crystal growth method applying the flexible flow guide ring. The flexible flow guide ring comprises any one or more of tantalum carbide, tungsten carbide, molybdenum carbide, niobium carbide and zirconium carbide. The preparation method of the flexible flow guide ring comprises the following steps: placing a flexible flow guide ring blank in heat treatment equipment containing silicon carbide powder or carbon powder, vacuumizing, filling argon, carbonizing, and obtaining the flexible flow guide ring after carbonization is finished. The silicon carbide crystal growth method using the flexible flow guide ring comprises the following steps: assembling the flexible flow guide ring and a crucible containing silicon carbide seed crystals and silicon carbide powder, transferring the crucible to a single crystal growth furnace after the assembly is completed, growing the silicon carbide crystals by using a PVT method, and obtaining the high-quality silicon carbide crystals after the growth is completed. The problems of crystal defects and flow guide ring cracking in the growth process of the silicon carbide crystal can be reduced.

The application provides a molybdenum-based monolithic catalyst, a preparation method and application thereof, and the preparation method comprises the following steps: S1, providing an electrically conductive carbon carrier and pretreating; S2, mixing a molybdenum-based precursor and a high-molecular alcohol substance in water to form a stable impregnation liquid system; S3, placing the pretreated electrically conductive carbon carrier into the impregnation liquid system, ultrasonic impregnating, and then drying to obtain a catalyst precursor; and S4, calcining the catalyst precursor under an inert gas to obtain the molybdenum-based monolithic catalyst. The application adopts a modified impregnation liquid to replace a traditional modified carrier strategy, improves the wettability of the impregnation liquid to the hydrophobic electrically conductive carbon carrier, and ensures the uniform distribution of the molybdenum-based active component on the electrically conductive carbon carrier. In addition, a core-shell high-activity catalytic structure of MoO2 core-molybdenum carbide shell is constructed, which can synergistically significantly improve the catalytic activity and stability.

The application provides a method and application for reducing molybdenum trioxide to generate molybdenum dioxide or molybdenum carbide, which comprises the following steps: dispersing MoO3 powder in a mixed solution of monohydric alcohol and polyhydric alcohol, adding a triblock copolymer P123 stabilizer, and obtaining a suspension which is subjected to microwave-assisted solvothermal reaction, centrifugation or filtration and washing, and then brown H 0.93 The MoO3 / C precursor microspheres are placed in an argon plasma environment and calcined at a high temperature of 500-600 DEG C for 30-60 min to obtain brown-black MoO2 / C microspheres; or the H 0.93 The MoO3 / C precursor is placed in a hydrogen-argon plasma environment and calcined at a high temperature of 500-600 DEG C for 30-60 min to obtain gray Mo2C / C microspheres. The MoO2 / C and Mo2C / C materials prepared by the application have nanocrystalline characteristics and excellent electrochemical performance, and have a good commercial application prospect as negative electrode materials of lithium batteries.

A composite catalyst for electrochemical hydrogenation (ECH) of furfural (FF) to 2-methylfuran (MF) includes Molybdenum Mxene and carbon nitride. In an example, the composite catalyst is two dimensional (2D)-on-2D Mo3C2@g-C3N4. By performing the ECH of FF with the composite catalyst in a mild electrolyte solution and enabling the selective production of MF at particular applied potentials, the composite catalyst minimizes challenges commonly associated with conventional ECH methods. The structure of the composite catalyst, in which Molybdenum sites act as active centers and nitrogen facilitates the hydrogenation of FF, enables direct hydrogenation of FF to MF, thereby increasing selectivity and efficiency. The composite catalyst shows a high preference for FF reduction over HER, significantly increasing the faradaic efficiency (FE). The Molybdenum Mxene can be Molybdenum carbide. In an example, an amount of Molybdenum Carbide in the composite catalyst is between about 5 and about 10 mass percent.

The application discloses a synthesis method and application of one-dimensional molybdenum carbide fibers with controllable crystal phase ratio, and belongs to the technical field of nanofiber preparation. The technical scheme is as follows: a carbon source and a molybdenum source are dissolved in a solvent to form a spinning stock solution, the spinning stock solution is prepared into a fiber membrane through a spinning method, and pre-oxidation is carried out under air or oxygen conditions; a carbothermal reduction reaction occurs in an inert atmosphere, different crystal structure molybdenum carbides are formed by controlling the reduction ability of the carbon source on the molybdenum source; and the different crystal structures include one phase or a mixed structure of two phases of metastable alpha-MoC and stable beta-Mo2C. In the reaction of preparing molybdenum carbide by carbothermal reduction of the carbon fiber, the reduction ability of the carbon can be adjusted to realize continuous conversion from the metastable alpha-MoC to the stable beta-Mo2C phase, and the safe, simple, efficient and flexible preparation method greatly reduces the difficulty and cost of material preparation, and provides a basis for the wide application of the molybdenum carbide material in different fields.

The present invention belongs to the field of sludge treatment and provides a method for comprehensively recovering copper components from copper-containing sludge by combining flameless combustion and pyrolysis. Aniline monomer and silicon carbide nanowires are dispersed in an acidic solution, oxidatively polymerized to form a polyaniline / silicon carbide composite material, which is then loaded with ammonium molybdate and subjected to high-temperature carbonization and sulfurization to obtain a functional material with molybdenum carbide as an active component. A phosphazene-based composite material with pollutant adsorption capacity is prepared by reacting hexachlorocyclotriphosphazene with hexagonal boron nitride, supplemented with cerium oxide and ferrous sulfide. The Mo2C@SiC-C material and the phosphazene complex serve as a catalyst and an adsorbent, respectively, and are synergistically used in a multi-stage heat treatment process. In the preheating stage, the porous structure of the material preliminarily adsorbs volatile pollutant gases. In the pyrolysis stage, the Mo2C catalyzes the decomposition of organic matter to reduce the generation of harmful gases. In the reduction stage, the Mo2C reduces the activation energy of the copper oxide reduction reaction to improve the recovery efficiency of metallic copper.

The invention discloses a method for mass production of spherical carbon by cracking hydrocarbon gas with a metal ball lifting liquid metal catalyst. The method comprises the following steps: using a composite catalyst system formed by the metal ball and the liquid metal catalyst as a cracking reaction catalyst; the metal balls are selected from one or more of zirconium oxide balls, calcium oxide balls, nickel oxide balls, TZM alloy balls, tungsten carbide balls, titanium carbide balls and molybdenum carbide balls. The method has the advantages that the carbon curing rate of the liquid metal catalytic cracking hydrocarbon gas hydrogen production technology can be obviously improved, the efficient utilization of the feed gas is realized, and the production cost is further reduced.

This invention provides a method for treating wastewater using molybdenum carbide-activated peracetic acid, relating to the field of advanced oxidation water treatment. The method includes the following steps: mixing organic wastewater and peracetic acid in a reactor, adjusting the pH, and then adding molybdenum carbide to initiate the oxidation reaction, rapidly degrading pollutants in the water. The pH of the organic wastewater is preferably weakly alkaline. In this invention, organic pollutants can be oxidized and degraded by active species generated by molybdenum carbide-activated peracetic acid, such as organic free radicals and hydroxyl free radicals. The degradation efficiency of sulfamethoxazole in the organic wastewater is highest at an initial pH of 9, achieving a removal rate of over 95% for different concentrations of sulfamethoxazole within two minutes. It also has a certain removal effect on other organic pollutants such as methylene blue. Molybdenum carbide is a solid powder, making it easily removed from water. This invention requires no additional energy intake, and peracetic acid also disinfects and sterilizes the water.

A kind of co-sputtering preparation method of molybdenum carbide composite phase film, Mo2C and Mo are deposited by Mo2C target and Mo target co-sputtering on substrate, and alpha-MoC / beta-Mo2C composite phase film is obtained after annealing treatment.The present application is co-sputtered with Mo2C and Mo target, that is, alpha-MoC / beta-Mo2C composite phase film can be obtained, and the alpha-MoC / beta-Mo2C composite phase film has more optimal hydrogen evolution performance compared with single-phase MoC.The preparation method of the co-sputtering preparation method of molybdenum carbide composite phase film is simple, stable and good, so it can be suitable for preparing large-area, binder-free hydrogen evolution negative electrode material.

The present disclosure relates to a noble metal single atom or cluster-porous molybdenum carbide / carbon nanocomposite using dynamic arrangement of noble metal single atoms or clusters, a method for preparing the same, a catalyst for hydrogen evolution reaction or hydrogen oxidation reaction including the same, and an electrode including the catalyst. The noble metal single atom or cluster-porous molybdenum carbide / carbon nanocomposite of the present disclosure, which is prepared by uniformly bonding a noble metal catalyst only on molybdenum carbide in the form of single atoms or clusters in atomic scale through selective dynamic arrangement, may have remarkably improved catalytic activity and kinetic characteristics since the utilization of the noble metal is improved through selective dynamic arrangement of the noble metal catalyst, may have high stability due to strong interaction between the noble metal catalyst and the molybdenum carbide, and may have high tolerance to carbon monoxide.In addition, the use of the noble metal can be decreased and the nanocomposite can be used as a catalyst for electrochemical hydrogen evolution reaction (HER) or hydrogen oxidation reaction (HOR) under acidic and basic conditions because it has superior catalytic activity, high stability and high tolerance to carbon monoxide. Furthermore, it can be prepared at low cost by a simple synthesis method and has good commercial viability.

According to the molybdenum carbide-metal composite catalyst as well as the preparation method and the application thereof, phenol and a formaldehyde solution are subjected to a heating reaction in a system in which an alkaline sodium hydroxide solution and a surfactant exist to form phenolic resin, molybdate and transition metal salt are introduced in the auto-polymerization process of the phenolic resin, and the molybdenum carbide-metal composite catalyst is obtained through one-step high-temperature carbonization treatment. The molybdenum carbide-metal composite catalyst which takes mesoporous carbon as a carrier and is loaded with molybdenum carbide particles and transition metal in a high-dispersion manner is obtained, and tight combination between the transition metal and molybdenum carbide is realized. According to the preparation method, sintering of the catalyst at high temperature can be effectively limited, the number of catalytic active sites is increased, efficient and stable catalysis is achieved, and the obtained molybdenum carbide-metal composite catalyst shows excellent activity and stability in the RWGS process. Meanwhile, the preparation method is simple and convenient in process, high in product composition morphology controllability and suitable for batch production.

The application discloses a preparation method and application of a selenium and nitrogen co-doped carbon loaded molybdenum-based lithium-sulfur battery diaphragm. A MoO3@ZIF-8 nanotube precursor material is synthesized through a hydrothermal method, and then is subjected to annealing treatment and selenium treatment, so as to obtain a selenium and nitrogen co-doped carbon loaded molybdenum carbide modified diaphragm. The application has the advantages of mild reaction condition, simple preparation method, obvious structural advantages of the obtained product, three-dimensional network structure of nanotube which can accelerate the transmission of electrons and ions and provide a large number of catalytic sites, strong polarity which can improve the adsorption capacity of polysulfides, and the like, and the lithium-sulfur battery has high discharge specific capacity, large current rate bearing capacity and excellent cycle stability, so that the lithium-sulfur battery has a wide application prospect.

The invention relates to the technical field of optical thin film manufacturing, in particular to a Mo2C / Ge multilayer film reflector and a preparation method thereof. The structure comprises a substrate, a periodic multilayer film and a cap layer which are tightly stacked in sequence from bottom to top, the periodic multilayer film comprises germanium films and molybdenum carbide films which are alternately stacked, and the first layer and the last layer are germanium films; in one period of the periodic multilayer film, the thickness of the germanium film is 17-21 nm, and the thickness of the molybdenum carbide film is 7-12 nm; the cap layer is made of molybdenum carbide, and the thickness of the cap layer is 2-4 nm. The number of cycles of the periodic multilayer film is 18-25, and the thickness of each cycle is 24-33 nm. And a direct-current magnetron sputtering method is adopted for alternate lamination preparation. The Mo2C / Ge multilayer film reflector has the advantages that the Mo2C / Ge multilayer film reflector has relatively small interface diffusion and relatively good stability; and meanwhile, the reflectivity at frequency doubling and long wave positions is relatively low, and the out-of-band reflectivity inhibition is better.

The application provides a method for preparing molybdenum carbide / carbon composite nanospheres based on electrostatic spinning technology, which comprises the following steps: adding ammonium molybdate into dimethylformamide, stirring for 2 hours, then adding polyacrylonitrile, and stirring for 6 hours to obtain a spinning solution; loading the spinning solution into a 10 mL syringe for electrostatic spinning to obtain precursor nanospheres Mo@PAN, and placing the precursor nanospheres in a tube furnace for heat treatment to obtain molybdenum carbide / carbon composite nanospheres. The application also provides applications in the fields of electrocatalytic hydrogen evolution, energy storage and coating materials. The molybdenum carbide / carbon composite nanospheres prepared by the method have uniform size distribution and good dispersibility. The spherical structure has good mechanical properties, and can ensure the structural stability of the material in the application process, preventing the microstructure of the material from being damaged. Meanwhile, the nanoscale spherical morphology provides a high specific surface area, which provides more active sites for the material in the applications of catalysis and energy storage, and is beneficial to improving the performance of the material.

The invention relates to the field of degradation catalysis, in particular to a catalyst for producing diesel oil by degrading polyolefin and application of the catalyst. The catalyst for producing diesel oil by degrading polyolefin comprises the following components in parts by weight: 1 part of molybdenum carbide and 2-3 parts of a solid acid catalyst. The preparation method of the molybdenum carbide comprises the following steps: uniformly mixing ammonium molybdate and melamine, then carrying out heat preservation for 2-5 hours at the temperature of 750-850 DEG C in an inert atmosphere, and cooling to obtain the molybdenum carbide. According to the method for preparing the diesel oil by catalytically degrading the polyolefin, after process parameters are adjusted and optimized, the catalytic selectivity is greatly improved.

This composite comprises a molybdenum compound and a noble metal. The molybdenum compound is at least one compound selected from the group consisting of molybdenum sulfide and molybdenum carbides, and the noble metal is at least one metal selected from the group consisting of platinum and palladium.

The invention discloses a sulfur-containing molybdenum carbide hydrogen evolution material and a preparation method and application thereof, and the preparation method comprises the following operation steps: S1, placing a molten salt electrolyte and a molybdenum-containing precursor in a crucible, mixing according to a certain proportion, and transferring to a molten salt reaction furnace to obtain a completely molten mixed molten salt; s2, immersing a cathode and an anode into the completely molten mixed molten salt at the same time for molten salt electrolysis, and obtaining a molybdenum carbide crude product from the cathode; s3, the molybdenum carbide crude product is subjected to aftertreatment and then mixed with the sulfur-containing precursor in proportion, hydrothermal vulcanization treatment is conducted, and the sulfur-containing molybdenum carbide hydrogen evolution material is formed. According to the preparation method, the substitution amount and bonding form of sulfur are accurately regulated and controlled through a molten salt electrolysis-hydrothermal preparation method, and the electronic structure and surface active site density of the material are optimized, so that the HER catalytic performance is improved, and the problems of non-uniform sulfur doping, insufficient activity and the like in a traditional method are solved.

The application discloses a platinum-nickel loaded molybdenum carbide / molybdenum dioxide nanocomposite material, a preparation method and application. The application first uses a metal molybdenum salt and a complexing agent as raw materials to prepare a Mo2C / MoO2 base material containing a heterojunction, then loads PtNi on the Mo2C / MoO2 base material to prepare the platinum-nickel loaded molybdenum carbide / molybdenum dioxide nanocomposite material. The MoO2 / Mo2C nanomaterial carrier well anchors the PtNi alloy, further improves the catalytic stability of the material, and the electronic coupling and interface synergistic effect provided by the heterojunction can enhance the reactivity of the active sites, so as to maximize the catalytic performance of the material, and further reduce the hydrogen production application cost under an acid condition. Experimental results show that the platinum-nickel loaded molybdenum carbide / molybdenum dioxide nanocomposite material has the advantages of high catalytic activity, excellent stability and the like as a hydrogen production electrocatalyst of an acid electrolyte, and therefore has a wide application prospect.