199 results about "Alloy catalyst" patented technology

The invention belongs to the technical field of catalytic materials and hydrocarbon reforming, and particularly relates to a high-entropy catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a metal salt solution containing lanthanum, chromium, copper, zinc, manganese, nickel, iron and cobalt ions with a chelating agent and a dispersing agent for reaction, carrying out ultrasonic cavitation treatment to obtain sol, adjusting the pH value, gelatinizing under an oil bath heating condition to obtain a colloidal precursor, drying, and calcining in an air atmosphere to obtain a perovskite type high-entropy oxide precursor; and then treating in a reducing atmosphere to obtain the FeZnCuNiCo perovskite type high-entropy alloy catalyst which contains metal components of La, Cr, Ni, Mn, Fe, Zn, Cu and Co and takes a multi-metal alloy active center of Fe-Zn-Cu-Ni-Co as a main component. The high-entropy catalyst can meet the harsh requirements of high temperature, strong carbon deposition driving force and long-period operation in a propane dry reforming reaction, and is suitable for industrial application scenarios of continuous production of high-temperature synthesis gas.

The invention belongs to the technical field of catalysts, and discloses a rare earth platinum alloy catalyst and a preparation method and application thereof. The catalyst comprises a nitrogen-doped carbon carrier, and a PtGd alloy and a Ni elementary substance are loaded on the nitrogen-doped carbon carrier. The preparation method comprises the following steps: (1) preparing a Gd-ZIF material; and (2) uniformly mixing the Gd-ZIF, the platinum source solution and the nickel source solution, carrying out vacuum drying treatment, heating to 700-1000 DEG C in a reducing atmosphere, keeping the temperature for 1-2 hours, and cooling to room temperature to obtain the rare earth platinum alloy catalyst. The invention discloses application of a rare earth platinum alloy catalyst which is used as a cathode oxygen reduction reaction catalyst of a hydrogen fuel cell. The preparation method disclosed by the invention is simple to operate and can be used for large-scale preparation; the Pt content of the rare earth platinum alloy catalyst prepared by the method is reduced to 13%, and the cost of raw materials is directly and greatly reduced; the maximum half-wave potential of the rare earth platinum alloy catalyst can reach 0.93 V vs.RHE which is far higher than that of commercial Pt / C.

The invention discloses a surface oxidation monatomic nano-alloy catalyst as well as a preparation method and application thereof, and belongs to the technical field of advanced nano-energy materials and electro-catalysis. A surface-oxidized monatomic nano-alloy catalyst comprises a hydroxylated carbon nanotube carrier and bimetallic nano-alloy particles loaded on the hydroxylated carbon nanotube carrier, in the bimetallic nano-alloy particles, non-noble metal elements are dispersed in noble metal nano-particles in a monatomic form, the size of the bimetallic nano-alloy particles is 3-4 nm, and the surface-oxidized monatomic nano-alloy catalyst is prepared from a surface-oxidized monatomic nano-alloy catalyst. An oxide layer with the thickness of 0.3-0.6 nm is arranged on the surface of the bimetallic nano-alloy particle; the loading amount of the noble metal is 5-15wt%. Ruthenium and other non-noble metal elements are alloyed and anchored on the carbon material substrate, the conductivity of the catalyst can be greatly improved, the size of alloy particles is accurately controlled within the range of 3-4 nm, active sites can be exposed to the maximum extent, and structural stability is considered.

The invention relates to a multi-conductive-agent composite conductive paste for a lithium battery and a preparation method of the multi-conductive-agent composite conductive paste, and belongs to the technical field of lithium battery conductive pastes.The multi-conductive-agent composite conductive paste is characterized in that an iron-molybdenum catalyst is loaded on expanded graphite, then vertical orientation carbon nanotubes and transverse graphene blades are grown in situ, the specific surface area is increased, and the expanded graphite serves as a layered carrier; a metal alloy catalyst can be uniformly loaded in natural pores of the carbon nanotube, a layered framework is kept from collapsing at a high temperature, support is provided for directional growth of a carbon material, electrons can be rapidly transmitted along the carbon nanotube when the composite conductive paste is prepared, gaps of the carbon nanotube are filled by graphene blades, a breakpoint-free conductive network is formed, and the composite conductive paste is prepared. And meanwhile, abundant pores provide channels for lithium ion diffusion, so that the conductive efficiency is improved from the source of the structure, and abundant specific surface area and subsequent nitrogen and sulfur loading provide sufficient sites.

The invention discloses a citric acid coordination regulated amino-functionalized palladium-silver alloy catalyst as well as a preparation method and application thereof. Nitrogen-doped carbon is used as a carrier, and the palladium-silver alloy catalyst is constructed through coordination-confinement in-situ reduction of citric acid. According to the preparation method, citric acid is introduced, and synergistic interaction of sub-nano-scale dispersion and efficient interface mass transfer is achieved through dual synergistic regulation and control of the size and the interface; the coordination effect enables the palladium-silver alloy to achieve sub-nano-scale superfine dispersion; as a competitive hydrogen bond acceptor / donor, the polycarboxyl group can effectively break an interface hydrogen bond network and inhibit the formation of a tight gas film from the source. The mechanism ensures that the catalyst is always in full contact with a mixed aqueous solution containing formic acid and formate and hydrogen is quickly released during formic acid dehydrogenation hydrogen production reaction, so that the catalyst has excellent anti-poisoning cycling stability while keeping high intrinsic activity, and the technical problem that high activity and long-term stability are difficult to consider at the same time is solved.

The invention discloses an ultra-dispersion storage type solid-liquid two-phase gallium-based alloy catalyst and a preparation method thereof. The catalyst takes liquid metal gallium as a storage container, and binary gallium-based alloy is uniformly dispersed in the liquid metal gallium. The ultra-dispersed storage type gallium-based alloy catalyst is prepared through step-by-step ball milling, gradient heating, gradient cooling and grinding redispersion, and uniform distribution of gallium-based alloy in liquid metal gallium is achieved. An internal alloy is segregated on the surface of liquid metal Ga through an electrochemical activation means, and efficient catalytic reaction is achieved. According to the storage type catalyst prepared by the process, the internal alloy is uniformly dispersed, is not agglomerated, and can be segregated on the surface of Ga for multiple times, so that the effect of storing sites is effectively realized. The segregated alloy is in a cluster shape, and a large number of agglomerated blocks do not exist. The ultra-dispersed storage type solid-liquid two-phase gallium-based alloy catalyst can realize repeated reactivation after surface sites fall off and are inactivated, so that internal storage sites are separated out again, and the catalytic activity is recovered.

The application provides a preparation method of a platinum-cobalt alloy catalyst, which comprises the following steps: preparing a hexadecyl trimethyl ammonium bromide clear solution; preparing a platinum compound, a transition metal cobalt salt and a dimethyl imidazole dispersion solution; adding the dispersion solution into the hexadecyl trimethyl ammonium bromide clear solution in sequence, stirring, adding a carbon black, a ketchen black, a cabot black or a carbon nanotube slurry, and continuously stirring to obtain a mixed solution I; then centrifuging, vacuum drying and grinding the mixed solution I to obtain an intermediate powder; then performing a different temperature staged calcination on the intermediate powder under a reducing / inert atmosphere to obtain an ordered low platinum-cobalt alloy catalyst powder; and then performing an acid washing, suction filtration, vacuum drying and grinding on the ordered low platinum-cobalt alloy catalyst powder to obtain a catalyst product which can be used in a fuel cell. The platinum-cobalt alloy catalyst prepared by the application can be applied to a proton exchange membrane fuel cell as a cathode oxygen reduction catalyst, and the platinum-cobalt alloy catalyst can improve the utilization rate, catalytic activity and durability of the noble metal Pt in the fuel cell cathode ORR catalyst, and can reduce the manufacturing cost and use cost of the fuel cell.

The invention belongs to the technical field of fuel cells, and particularly relates to a high-durability alloy catalyst and a preparation method and application thereof. The prepared high-durability alloy catalyst comprises a metal monatomic carrier Q-N-C and PtM alloy nanoparticles loaded on the metal monatomic carrier Q-N-C, the metal monatomic carrier Q-N-C is composed of a nitrogen-doped carbon carrier N-C and a metal monatomic Q loaded on the nitrogen-doped carbon carrier N-C, and the PtM alloy nanoparticles are composed of Pt salt and M metal salt; the related preparation method can effectively adjust the interaction between the carrier and the alloy, has high durability, and can solve the problem that the second phase metal in the alloy catalyst is easy to dissolve out by using the monatomic catalyst as the carrier of the catalyst and using the carrier as a receiver for receiving the dissolution of the second phase of the alloy catalyst. Meanwhile, excellent electrochemical performance and relatively high stability are realized.

The invention relates to the technical field of catalytic materials, in particular to a monatomic alloy catalyst and a preparation method and application thereof.The preparation method comprises the steps that a first solution obtained by mixing cobalt salt, silver salt and a solvent is mixed with a second solution obtained by mixing 2-methylimidazole and a solvent, stirring treatment is conducted, and a first precursor solution is obtained; and carrying out first heat treatment on the obtained precipitate in an inert atmosphere to obtain the fcc Ag1Co / C monatomic alloy catalyst. A first solution and a second solution are mixed to obtain an Ag / ZIF-67 precipitate which is a Co-based zeolite imidazate framework structure composite material, an organic framework of the Co-based zeolite imidazate framework structure composite material is decomposed and carbonized through high-temperature heat treatment, meanwhile, Ag and Co species are reduced and converted into nanoparticles, and the Ag / ZIF-67 precipitate is obtained. And finally, the composite material catalyst with the Ag1Co monatomic alloy nanoparticles embedded into the nitrogen-doped carbon matrix is formed. The catalyst shows the most excellent activity and selectivity, the removal rate of 4-NP reaches 100% within 6 min, and high catalytic activity can be achieved.

A hydrogen evolution electrode preparation method based on a three-period minimal curved surface structure belongs to the technical field of new energy electrolytic hydrogen production and fluid transportation, and comprises the following steps: constructing a three-dimensional model of the required three-period minimal curved surface structure; performing image slicing processing on the three-dimensional model by using slicing software; printing a required three-period minimal curved surface structure by using a plane projection micro-stereolithography 3D printer; a nanometer ultraviolet lamp is adopted to circularly irradiate the three-period extremely-small curved surface structure; soaking in a sulfuric acid solution and carrying out ultrasonic oscillation; carrying out vacuum drying and carrying out oxygen plasma hydrophilic treatment; depositing a nickel-based compact conductive layer on the three-period minimal curved surface structure by using chemical deposition; depositing a nickel-iron alloy catalyst on the three-period minimal curved surface structure of the nickel substrate by using electro-deposition; and carrying out ultrasonic oscillation with ethanol and vacuum drying. According to the application, collaborative design of catalyst distribution and a macro-microstructure is realized, and a new way is provided for preparation of a high-performance water electrolysis hydrogen production electrode.

The application provides a screening method and device for a reforming product oil selective hydrogenation alloy catalyst, and the method comprises the following steps: obtaining reactant information, small molecule substance information which can reflect the structural characteristics of the reactant, all alloy catalyst systems to be screened, and the relationship between transition metals and hydrogen atom adsorption capacity; generating an alloy catalyst surface model for each alloy catalyst system, predicting the surface hydrogen atom coverage, combining the small molecule substance information to construct a kinetic model, and obtaining intrinsic reaction kinetic information of each alloy catalyst surface model; taking the predicted surface hydrogen atom coverage and hydrogen atom adsorption energy as input data, and taking catalytic performance as output data to construct a prediction model; obtaining the catalytic performance prediction value of each alloy catalyst surface model according to the prediction model; and screening the alloy catalyst according to the catalytic performance prediction value to obtain the reforming product oil selective hydrogenation alloy catalyst. The method can realize rapid screening of the catalyst.

The application relates to a preparation method of a nanoporous NiBi alloy catalyst for nitrogen reduction. The nanoporous NiBi alloy catalyst is obtained by using Al, Ni and Bi metal particles as raw materials and by adopting a method of smelting, belt casting and dealloying. The application has the following advantages: (1) the three-dimensional nanoporous structure of the catalyst can provide abundant active sites for the catalytic reaction and is beneficial to electron transmission in the reaction process; (2) the synergistic effect of the Ni phase and the NiBi phase can effectively reduce the reaction energy barrier of the rate-determining step, inhibit the hydrogen evolution side reaction and improve the catalytic efficiency; and (3) the preparation method is simple and efficient, low in price, safe and environmentally friendly, and has a good application prospect in the field of electrocatalytic nitrogen synthesis ammonia.

The invention belongs to the technical field of nano material catalysts, and particularly relates to a metal organic framework derived carbon-supported high-entropy alloy catalyst for carbon dioxide hydrogenation and a preparation method thereof. The preparation method comprises the following steps: dissolving zirconium salt, an amino-functionalized organic ligand and a regulator in a solvent to react to form an MOF precursor; the MOF precursor and a salt template agent are subjected to heat treatment in an inert atmosphere, then the template agent is removed, purification is performed, and a nitrogen-doped carbon carrier is obtained; a transition metal compound and a noble metal compound are loaded on a nitrogen-doped carbon carrier through an impregnation method, and then reduction and alloying treatment are performed by adopting a pulse Joule thermal method to prepare the catalyst. A Co, Ni, Cu, Pt and Pd five-element metal system adopted in the catalyst forms an efficient synergistic catalytic center, and a CH4 synthesis path with high activity and high selectivity is guided together; a pulse Joule thermal method is used for reduction activation, so that the catalyst has excellent carbon deposition resistance and long-term operation stability.

This invention provides a zinc-nickel single-atom alloy catalyst, its preparation method, and its applications. The invention relates to the field of catalyst synthesis technology. This zinc-nickel single-atom alloy catalyst has a carbon-coated structure with a porous surface. Zinc is dispersed in single-atom form on the surface of nickel particles, forming a single-atom alloy structure, and simultaneously possessing both Lewis acidic and Lewis basic sites. Through innovative material design and preparation methods, this invention successfully synthesizes a novel zinc-nickel single-atom alloy catalyst with superior performance. This catalyst cleverly combines efficient photothermal conversion, the electronic regulation characteristics of single-atom alloys, and the structural advantages of a porous carbon support. It achieves highly efficient and selective conversion of CO2 cycloaddition reactions under mild conditions, while exhibiting significant advantages in energy consumption, cost, and stability, showing promising prospects for industrial applications.

The invention relates to a preparation method and application of a Turing-shaped high-entropy alloy catalyst under an interlayer confinement range, and belongs to the technical field of catalyst preparation and electro-catalysis. According to the method, materials are ingeniously taken, commercialized crystalline flake graphite which is low in cost and resistant to acid and alkali corrosion is particularly selected to be combined with aniline to assist metal salt cation coordination, and simple mixing and sufficient intercalation are conducted firstly. And finally, performing in-situ pyrolysis on the metal salt ions confined between the carbon layers through low-temperature heat treatment, and promoting the formation of a Turing structure pattern with uniform size and uniform distribution by virtue of a confinement diffusion-reaction mechanism, so as to successfully obtain the Turing-shaped high-entropy alloy catalyst. In a performance test, the catalyst shows excellent three-function electro-catalysis HER / ORR / OER activity and stability under an alkaline medium. Furthermore, an oxygen electricity-hydrogen electricity sustainable energy system based on self-driving of the metal-air battery is constructed by virtue of the excellent multifunctional catalytic performance of the catalyst.

Disclosed is a method for preparing a platinum-based alloy catalyst using a solution combustion synthesis method, as characterized in that a metal which forms an alloy together with platinum is first loaded on a support and then platinum is loaded thereon.

The present application relates to the technical field of catalytic materials, and discloses a halloysite nanotube loaded palladium-platinum bimetallic alloy catalyst and a preparation method thereof, the catalyst comprising heat pretreated halloysite and uniformly dispersed palladium-platinum bimetallic alloy particles, and the mass ratio of palladium, platinum and heat pretreated halloysite being 0.012-0.022:0.012-0.022:1. The preparation method comprises mixing the heat pretreated halloysite with palladium chloride and chloroplatinic acid hexahydrate, adding concentrated ammonia water to adjust the pH to 9-11 to form an ammonia complex; obtaining a precursor through a hydrothermal reaction, and adding sodium borohydride for liquid phase reduction. The bimetallic alloy phase produces geometric and electronic synergistic effects, thereby reducing the reaction activation energy; the ammonia complex ion is chemically bonded with the hydroxyl group of the carrier to prevent the loss of active components in the hydrothermal environment. The catalyst is combined with glycerol to produce hydrogen in situ, thereby avoiding the safety hazards and equipment investment of external high-pressure hydrogenation, and realizing the high-yield conversion of green diesel under extremely low noble metal loading.

The application belongs to the technical field of nanomaterials and electrocatalysis, and particularly relates to a one-dimensional nanowire structure monatomic alloy catalyst, a preparation method and application. The catalyst comprises a carrier and an active component, the structure of the active component is that Pt is dispersed in the form of monatomic on the surface of a nanowire of a base metal M, the M comprises one or more of Au, Ag, Ru, Pd, Rh, Ir and Os, and the active component is anchored on the carrier. The catalyst has an excellent one-dimensional nanowire structure with outstanding stability, the preparation process is simple, the effective product yield is high, and the prepared platinum-based catalyst material has superior oxygen reduction electrocatalytic performance and stability.

This invention belongs to the field of catalytic materials technology, and discloses a NiCo nanosphere alloy catalyst material, its preparation method, and its application. The invention involves dissolving nickel nitrate, cobalt nitrate, and anhydrous sodium acetate in ethylene glycol and stirring vigorously until homogeneous. The homogeneous solution is then transferred to a polytetrafluoroethylene (PTFE) reactor and reacted at an ambient temperature of 25–350°C for 1–120 h. The reaction product is washed, centrifuged, and the resulting pale blue precipitate is dried. The dried pale blue precipitate is then reduced in a tube furnace to obtain a NiCo alloy catalyst material with a nanosphere structure. The synthesis process of this NiCo alloy catalyst material is simple and the conditions are mild. When used for the catalytic hydrogenolysis of lignin to high-value aromatic monomers, the obtained catalyst material exhibits high selectivity for aromatic monomers, and its catalytic performance is comparable to commercially available noble metal catalysts, representing a significant breakthrough in replacing noble metals with inexpensive transition metals.

The invention discloses an oxygen reduction catalyst based on Nb-oxygen fluorine cluster confinement and pulse induction ordering as well as a preparation method and application of the oxygen reduction catalyst. The preparation method of the platinum-based multi-component alloy catalyst comprises the following steps: S1, adding ammonium niobate fluoride and hydrogen peroxide into a dispersion liquid containing a carbon carrier for reaction so as to introduce Nb-oxygen fluorine clusters on the surface of the carbon carrier in situ; s2, a platinum source, a cobalt source and a nickel source are added into a product obtained in the step S1, then ascorbic acid and sodium borohydride are added for a reaction, and Pt-Co-Ni alloy particles in the Nb-oxygen fluorine cluster confinement range are obtained; and S3, carrying out pulse Joule heating treatment on the product obtained in the step S2 so as to convert the alloy from a disordered structure into an ordered L12 phase, thereby obtaining the platinum-based multi-component alloy catalyst. The catalyst disclosed by the invention shows excellent oxygen reduction reaction activity and long-term stability when applied to the cathode of the proton exchange membrane fuel cell.

This invention discloses an alloy catalyst, comprising a support and a copper-ruthenium alloy supported on the support, wherein the copper-ruthenium alloy is: Cu 0.7 Ru 0.3 The alloy catalyst prepared by this invention can be used to prepare cyclopentanone. The catalyst has high activity, good stability, and low price. The reactants used in the reaction are renewable, widely distributed, and inexpensive. The preparation of cyclopentanone using the catalyst of this invention does not require the introduction of acid or alkali, which solves the problem of difficult acid treatment in the prior art. Furthermore, it is not corrosive to the reaction equipment, which is conducive to large-scale production.

This invention discloses a multi-element alloy catalyst for hydrogen production via water electrolysis in an alkaline electrolyzer, its preparation method, and its application, relating to the field of catalyst technology for hydrogen production via water electrolysis. The catalyst comprises a multi-element alloy component and a rare earth metal oxide component; based on the total mass of the multi-element alloy catalyst, the mass fraction of the multi-element alloy component is 70%–99.9%, and the mass fraction of the rare earth metal oxide component is 0.1%–30%. The multi-element alloy component contains Fe, Ni, Cr, and Mn. In preparation, the above metals are first mixed in proportion, then evaporated by plasma heating and condensed with an inert gas to obtain alloy powder, which is then mixed with rare earth oxide powder. This method is simple and easily scalable. The resulting catalyst exhibits high activity and long-term operational stability in the alkaline oxygen evolution reaction, while effectively reducing material costs by utilizing inexpensive metal elements, providing a feasible technical solution for efficient and low-cost hydrogen production via water electrolysis.

The invention provides preparation and application of a carbon carrier loaded Ru-based alloy catalyst, and belongs to the technical field of electrolytic hydrogen production. According to the catalyst, firstly, nitrogen-doped carbon is loaded on a porous substrate, then Ru-based metal is further loaded on the basis of the porous substrate loaded with the nitrogen-doped carbon, and the Ru-based alloy is obtained through electrochemical reduction of the Ru-based metal. The catalyst can show excellent hydrogen evolution activity and stability in high-corrosivity acidic water electrolyte, the RuNi alloy catalyst can reach the current density of 1.5 A cm <-2 > only with the overpotential of 200 mV, the stability of more than 2000 hours is shown under the high current density of 1.1 A cm <-2 >, and the catalyst can be effectively applied to the field of electrolytic hydrogen production.

The application discloses an electrochemical double hydrogenation three-cell system, which comprises a chemical cell, an anode cell, a cathode cell, an ion exchange film, a palladium film, and a power supply; the palladium film serves as an anode electrode, and a first nano-porous palladium alloy catalyst is coated on one side of the surface of the palladium film; a cathode electrode is arranged in the cathode cell, and the cathode electrode is a second nano-porous palladium alloy catalyst; the system generates adsorbed hydrogen by electro-oxidation of a second organic substrate in the anode cell on the surface of the palladium film through the anode electrode; the adsorbed hydrogen is transferred to the chemical cell through the characteristics of the palladium film body phase hydrogen transfer, and the hydrogenation of the organic substrate is realized on the surface of the first nano-porous palladium alloy catalyst; meanwhile, the cathode electrode generates adsorbed hydrogen by hydrolysis on the surface of the second nano-porous palladium alloy catalyst to realize the hydrogenation of the organic substrate, and finally the electrochemical double hydrogenation of the organic matter is realized; experimental results show that when the three-cell system is applied to organic hydrogenation, the faraday efficiency is as high as 200%, and meanwhile, the system has excellent stability and ultralow energy consumption.

The present invention addresses the problem of providing a carbon-supported platinum or platinum alloy catalyst for a solid polymer fuel cell, said catalyst having high activity and high durability. [Solution] A carbon-supported platinum or platinum alloy catalyst in which platinum particles or platinum alloy particles are supported on mesoporous carbon, the carbon-supported platinum or platinum alloy catalyst being characterized in that: the load rate of platinum or platinum alloy in the catalyst is 30-70% by weight of the total weight of the catalyst; relative to the total weight of the platinum particles or the platinum alloy particles, the total weight of the platinum particles or the platinum alloy particles loaded outside the pores of the mesoporous carbon is 60-90%; the average particle diameter D1 of the platinum particles or platinum alloy particles supported in the pores of the mesoporous carbon is the same as or greater than the average particle diameter D2 of the platinum particles or platinum alloy particles supported outside the pores of the mesoporous carbon, and the average particle diameter D1 and the average particle diameter D2 are each independently 2 nm or more and 8 nm or less.

The invention belongs to the technical field of new materials, and particularly discloses a precious metal-loaded porous high-entropy alloy catalytic material as well as a preparation method and application thereof. A laser powder bed melting technology is used for constructing a three-period tiny curved surface structure micron hole precursor of the high-entropy alloy; and then a dealloying technology is combined with a replacement reaction, the precursor is placed in a corrosive liquid containing precious metal salt, and precious metal is replaced by active elements in the precursor, so that the precious metal is introduced while a nano-porous structure is formed on the surface of the precursor, and the precious metal-loaded micro-nano hierarchical porous high-entropy alloy catalyst is formed. After being activated by sulfate in wastewater treatment, the catalyst shows excellent dynamic advantages and extremely high environmental stability, and pollutants can be efficiently degraded within extremely short time. The risk of toxic residues existing in the traditional advanced oxidation technology is eliminated, and the biotoxicity and mutagenicity risk of the treated water body are remarkably reduced, so that extremely high practical value and environmental safety are shown.

The invention discloses a supported Ni-based alloy catalyst preparation method, which comprises: S1, dissolving a tungsten compound in water, loading on an Al2O3 carrier through an impregnation method, aging, drying, and roasting in air to obtain an intermediate; and S2, dissolving a nickel compound in water, loading the nickel compound on the intermediate through an impregnation method, aging, drying, roasting in air, and performing reduction treatment in an H2 atmosphere to obtain the catalyst. The catalyst is high in activity, good in selectivity and stability, simple in preparation method and low in cost.

The invention belongs to the technical field of alkaline electrolysis water oxygen evolution reaction, and particularly relates to a high-entropy alloy catalyst and a preparation method and application thereof, and the catalyst takes carbon as a carrier and is marked as FeCoNiWCd / C. The preparation method of the high-entropy alloy catalyst comprises the following steps: S1, dispersing a carbon carrier in a solvent, performing ultrasonic homogenization in an ice water medium, sequentially adding salt solutions of five metals, namely Fe, Co, Ni, W and Cd, into the solvent, and continuing ultrasonic treatment to obtain a uniform suspension; s2, transferring the turbid liquid obtained in the step S1 to a high-pressure microjet dispersion instrument for dispersion, and then transferring the turbid liquid to an evaporator for drying; and S3, grinding the powder in the S2, performing thermal decomposition reduction in a tubular furnace, and cooling to room temperature to obtain the catalyst FeCoNiWCd / C. According to the method, uniform distribution of the alloy on the carbon carrier is promoted through high-pressure microjet dispersion, and the obtained high-entropy alloy is small in particle size, large in specific surface area and excellent in electro-catalytic performance.

This invention belongs to the field of catalyst technology, specifically relating to a high-entropy alloy catalyst, its preparation method, and its application. The high-entropy alloy catalyst is composed of five metallic elements—Pt, Ir, Fe, Mo, and Bi—in a molar ratio of (0.05-0.3):(0.05-0.3):(0.1-0.4):(0.1-0.4):(0.05-0.3), and the catalyst is supported on carbon nanotubes. The catalyst of this invention exhibits good thermal stability and resistance to carbon deposition, retaining over 90% of its activity after five cycles.

The invention provides a high-entropy alloy catalyst, a preparation method and application of the high-entropy alloy catalyst in methanol synthesis, atomic-scale uniform dispersion and alloying of four metal elements of Fe, Co, Ni and Zn on a carbon carrier are realized by adopting a two-step carbon thermal shock method, and meanwhile, a Cu-rich active layer structure is constructed on the surface of the catalyst by controllably introducing a Cu element. The preparation method not only solves the problem of non-uniform mixing of elements in a traditional method, but also can accurately regulate and control active sites, so that the catalyst has optimized CO adsorption sites (Fe / Co) and methanol desorption sites (Ni / Zn / Cu), and the catalytic activity and stability of a reaction for preparing methanol by CO hydrogenation are remarkably improved.