140 results about "Molybdenum carbide" patented technology

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 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 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.

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.

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.

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 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 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.

The invention provides an ultralow platinum-loaded composite photocatalyst based on indium zinc sulfide as well as a preparation method and application of the ultralow platinum-loaded composite photocatalyst, and belongs to the technical field of photocatalytic materials. The preparation method comprises the following steps: (1) mixing molybdenum carbide with an alcohol reagent for the first time to obtain a dispersion liquid; dropwise adding a chloroplatinic acid solution into the dispersion liquid, carrying out second mixing, adjusting the pH value to 7-8, and carrying out a high-temperature reaction to obtain a Mo2C-Pt composite material; (2) dispersing the Mo2C-Pt composite material in an alcohol reagent to obtain a suspension liquid; sequentially adding a zinc source, an indium source and thioacetamide into the suspension liquid, and stirring until the brownish black mixture becomes a grey white suspension liquid; and carrying out heating reaction on the off-white suspension to obtain the Mo2C-Pt-coated ZIS composite photocatalyst. The obtained ultra-low platinum supported photocatalyst has low cost and high performance, the preparation method is simple, and the photocatalytic hydrogen evolution performance is excellent.

The invention belongs to the technical field of electrochemical biosensing, and particularly relates to a membrane-free anti-interference metabolite detection device and a construction method thereof, in particular to a membrane-free anti-interference biosensor based on hydrogen peroxide signal transduction and a construction method thereof. The sensor comprises a working electrode and a reaction layer arranged on the surface of the working electrode, wherein the reaction layer comprises a biological recognition unit for in-situ generation of hydrogen peroxide and a catalysis unit for electrochemical reduction of hydrogen peroxide; the catalytic unit comprises a nitrogen-doped carbon matrix on which at least one of iron (Fe), cobalt (Co) and copper (Cu) in a monatomic form and molybdenum carbide (MoC) nanoparticles are loaded. The sensor disclosed by the invention shows excellent anti-interference capability and detection accuracy in a real human body sample, and can be expanded and applied to various oxidase coupled metabolite detection systems which are generated by depending on hydrogen peroxide, so that a universal sensing platform is provided for non-invasive or minimally invasive metabolite analysis in complex biological fluid.

The invention discloses an electrocatalytic composite material based on cobalt monatomic regulation and control of molybdenum carbide phase change as well as a preparation method and application of the electrocatalytic composite material, and relates to the technical field of electrocatalytic hydrogen production. The preparation method comprises the following steps: dispersing a cobalt source, a molybdenum source and a surfactant in water, and adjusting to acidity to obtain a reaction solution; placing a substrate in the reaction solution, and reacting at 150-250 DEG C for 4-8 hours to obtain a precursor; placing the precursor and a carbon source in an inert atmosphere, raising the temperature to 800-1000 DEG C at 3-7 DEG C / min, and keeping the temperature for 1-3 hours to obtain an electro-catalytic composite material; in the reaction solution, the molar ratio of the molybdenum element to the cobalt element is 1: (0.01-0.33); the molar ratio of the molybdenum element to the carbon source in the reaction solution is 1: (0.01-0.03). A hydrothermal synthesis and high-temperature carbonization method is adopted, a carbide phase structure is precisely regulated and controlled through cobalt monatomic, and optimization of an electronic structure and catalytic performance is achieved, so that application of electrolyzed water in a full pH range is achieved.

This invention discloses a method for preparing and applying a Pt-doped molybdenum carbide catalyst, belonging to the field of catalytic materials technology. The method comprises the following steps: (1) mixing a molybdenum source, a platinum source, and a carbon source to obtain a mixture; grinding the mixture to obtain product S1; (2) heating product S1 in a Joule heating apparatus under an inert gas atmosphere until fully reacted to obtain product S2; (3) cooling, washing, and drying product S2 to obtain the Pt-doped molybdenum carbide catalyst. This method can synthesize a Pt-doped molybdenum carbide catalyst in a few seconds or even less than one second. This catalyst exhibits good catalytic activity for electrocatalytic hydrogen evolution, chemical hydrogen evolution, and thermochemical hydrogenation reactions, and is widely used in water electrolysis, chlor-alkali industry, organic synthesis, and other fields. The raw materials used in this invention are inexpensive, the process is simple, and the time consumption is short, making it suitable for rapid catalyst production.

The application discloses a kind of liquid-phase laser preparation methods of molybdenum carbide carrier load metal composite material, first based on liquid-phase pulse laser ablation technology in acetone ablation elemental Ag or Au target material, obtain the Ag or Au nanoparticle of uniform dispersion with 1-2 layers carbon layer coating, the process metal nanoparticle size distribution is uniform and adjustable.Then utilize pulse laser irradiation technology to make oxide MoO3 powder in high carbon reduction liquid phase environment (acetone) in situ carbonization change into MoC nanoparticle.Finally, using 355nm wavelength laser irradiation metal nanoparticle and MoC mixed liquid can prepare Ag@MoC or Au@MoC etc. series composite materials.The method improves the traditional metal doped molybdenum carbide process, without adding any other surfactant, stabilizer and other chemical reagents, avoid the generation of other impurity products.Operation is simple, green and efficient, and strong universality.

The invention provides a molybdenum oxide-molybdenum carbide composite catalyst for producing hydrogen by electrolyzing water and a preparation method thereof. The preparation method mainly comprises the following steps: 1) performing hydrothermal reaction on ammonium molybdate and urea to obtain a molybdenum oxide nanobelt; 2) performing low-temperature primary thermal carbonization on the molybdenum oxide nanobelt to obtain a precursor MoOx / C nanobelt; and 3) carrying out secondary microwave carbonization and reduction heat treatment on the precursor MoOx / C nanobelt to prepare the molybdenum oxide-molybdenum carbide composite catalyst. According to the prepared molybdenum oxide-molybdenum carbide composite catalyst, catalytic active sites are remarkably increased, the electronic structure is effectively adjusted, and then the excellent performance of hydrogen evolution through electrolysis of water is shown. The method has the advantages of simple process, low cost, good controllability and the like, is suitable for large-scale popularization and application, and has a wide application prospect in the field of hydrogen production by water electrolysis.

The invention relates to the technical field of high polymer materials, and provides a TPV foaming coated sealing strip which comprises a composite TPV rubber strip and a framework used for supporting the composite TPV rubber strip, the framework is located below the composite TPV rubber strip, and the composite TPV rubber strip comprises a foaming body and a coating layer from inside to outside; the coating layer comprises the following components in parts by weight: 55-75 parts of ethylene propylene diene monomer, 20-30 parts of polypropylene resin, 1-1.5 parts of an anti-aging agent, 2-3 parts of a cross-linking agent, 6-8 parts of a lubricating agent, 2-4 parts of a dispersing agent and 2-5 parts of filler; the lubricant is prepared from graphite and modified molybdenum disulfide in a mass ratio of 0.9: (0.6-1.2); the modified molybdenum disulfide is molybdenum disulfide composite molybdenum carbide. By means of the technical scheme, the problem that in the prior art, a TPV foaming coating type sealing strip is insufficient in abrasion resistance is solved.

This invention discloses a core-shell hydrogenation catalyst and its preparation method. The catalyst comprises a core layer and a shell layer, wherein the core layer is alumina loaded with an active metal component, and the shell layer is alumina loaded with molybdenum carbide. The active metal is at least one of Group VIII metals and at least one of Group VIB metals. The preparation method of the catalyst is as follows: first, boehmite powder is mixed with an organic acid solution and dried before introducing the active metal component. Then, after molding, a spherical core layer material is obtained. Then, under rolling spherical conditions, the obtained spherical core layer material, boehmite powder, molybdenum carbide powder, and an organic alcohol polymer solution are mixed evenly to obtain a catalyst precursor. Finally, the catalyst precursor is dried and calcined to obtain the core-shell hydrogenation catalyst. The hydrogenation catalyst provided by this invention is particularly suitable for the hydrogenation conversion of heavy oil, coal tar, and other oils containing macromolecular aromatics and polycyclic aromatic hydrocarbons.

Disclosed is a catalyst for hydrogen evolution reaction or hydrogen oxidation reaction, which is a catalyst that can be used under alkaline conditions and has significantly improved kinetic characteristics compared to existing commercial platinum catalysts. The present invention provides a catalyst for electrochemical hydrogen reaction under alkaline conditions and a method for preparing the same, and a ruthenium-based catalytic electrode containing the same, which can be used as an electrode for anion exchange membrane-based water electrolysis cell and fuel cell, wherein the catalyst has 2 to 20 ruthenium supported in an aggregate form on the surface of a molybdenum carbide-carbon nanocomposite carrier.

The invention provides a carbide supported catalyst and a preparation method and application thereof, the active components of the catalyst comprise, by mass, 70%-99.95% of molybdenum carbide and / or iron carbide, and 0.05%-30% of nonferrous metal; the mass percent of the non-ferrous metal is calculated according to the metal form, and the non-ferrous metal comprises at least one of ruthenium, rhenium, rhodium, cobalt, barium and nickel. The catalyst provided by the invention is relatively simple in preparation process, non-toxic and easily available in raw materials, beneficial to industrial application and capable of greatly reducing the cost; the catalyst prepared by adopting the method is easy to form, relatively high in mechanical strength and high in catalytic activity, and effectively integrates various synthesis ammonia active components, so that the catalyst has a very strong industrial application prospect.

The application belongs to the field of environmental functional materials and water treatment technology, and specifically discloses a composite material for simultaneously removing antibiotics and hexavalent chromium in water based on a selenium iron / carbon molybdenum heterostructure, and a preparation method and application thereof. The composite material comprises composite selenium iron nanoparticles and carbon molybdenum, and a heterojunction interface is formed between the selenium iron nanoparticles and the carbon molybdenum. The selenium iron / carbon molybdenum catalyst constructed by the heterojunction engineering utilizes the enhanced active metal circulation reaction and a large number of in-situ generated interface defects to synergistically improve the intrinsic electron transfer capability, constructs a high-efficiency redox reaction interface platform, and efficiently activates the persulfate oxidant, so as to realize the simultaneous and rapid removal of antibiotics and heavy metals in water.

The application relates to a preparation method of a non-noble metal single-atom doped molybdenum carbide catalyst, wherein C3N4 is used as a self-sacrifice template, dopamine hydrochloride and alkali are sequentially added into a solvent A, then in-situ polymerization is carried out, a polydopamine layer is coated on the surface of the C3N4 to obtain a precursor A; a metal source is dissolved in a solvent B, then the precursor A is impregnated, and the solvent is evaporated to obtain a precursor B; the precursor B is subjected to heat treatment at 600-1200 DEG C under an inert gas atmosphere, and the non-noble metal single-atom doped molybdenum carbide catalyst is obtained. The application also relates to a molybdenum carbide-based hydrogenation catalyst prepared by the method, the activity component has high dispersity, a two-dimensional porous structure is beneficial to the adsorption and diffusion of reactants, the preparation method is simple and easy to implement, and the catalyst has excellent catalytic performance in selective hydrogenation of aromatic nitro compounds, selective hydrogenation of quinoline and the like.

The invention discloses a molybdenum carbide nano flower ball-loaded low-platinum-loading-capacity hydroxide catalyst and a preparation method thereof, and belongs to the technical field of new energy materials. The invention designs and synthesizes a molybdenum carbide carrier with a porous nanoflower structure for providing anchoring positioning for a platinum-nickel electric load. The invention finds that the alkaline HOR performance of the Pt / Ni-coated Mo2C catalyst is the best when the content ratio of platinum to nickel is 10: 1. Structural characterization and electrochemical hydrogen oxidation performance tests of the system show that the Pt / Ni-coated Mo2C catalyst can reach the current density of 2mA cm <-2 > under the overpotential of 50mV, and the performance of the Pt / Ni-coated Mo2C catalyst is equivalent to that of a commercial platinum-carbon (20wt.% Pt / C) catalyst. The invention provides a new thought for developing an efficient and stable hydroxide catalyst with low platinum (0.3364 wt.%) loading capacity. The supported electrocatalyst has very strong electrocatalytic hydrogen oxidation performance and very good electrocatalytic application potential.