30 results about "Alloy nanoparticle" patented technology

The invention discloses a preparation method of a copper-palladium alloy loaded nano titanium dioxide semiconductor material as a catalyst for a carbon dioxide reduction reaction. Firstly, alloy nanoparticles are generated through a sol-gel method, the morphology of the nanoparticles is controlled and agglomeration is prevented through oleylamine and oleic acid, and borane-tert-butylamine is added at the temperature of 170 DEG C to regulate and control the sizes of the generated alloy nanoparticles. A series of characterizations prove that the catalyst has a very good particle loading condition, uniform particle distribution and increased reaction active sites, and shows excellent activity when being applied to a carbon dioxide reduction reaction, when the loading capacities of copper and palladium are respectively 1%, the activity of the obtained catalyst is the highest, the methane generation rate can reach 20.23 mol / g / h, and the methane generation rate can reach 20.23 mol / g / h. The selectivity of methane reaches 100%.

The application belongs to the technical field of high-entropy nanomaterials, and particularly relates to a method for preparing FePt-based high-entropy alloy nanoparticles by a strong magnetic field assisted wet chemical method. A certain amount and proportion of Fe, Pt and additive element X metal precursors, a reducing agent and a surfactant are added into a solvent under a strong magnetic field. After being mixed uniformly under the protection of an inert atmosphere, water removal treatment is performed, then heating is performed at a certain heating rate until a target temperature, and after being kept warm, cooling is performed until room temperature. The obtained black mixed solution is cleaned, centrifuged and vacuum dried. Finally, FePt-based high-entropy alloy nanoparticles with uniform composition and small particle size are prepared. In the experiment process, the strong magnetic field is introduced into the wet chemical synthesis, the reduction speed of the metal precursors can be controlled, the co-reduction of metals with different reduction potentials is realized, the FePt-based high-entropy alloy nanoparticles with uniform composition are obtained, and then excellent water electrolysis hydrogen evolution performance is obtained.

The application belongs to the technical field of catalyst preparation, and relates to a preparation method and application of a CoCuNiPtRu high-entropy alloy nanoparticle catalyst. A one-pot wet chemical method is used to uniformly mix 4-amino pyridine solvent and metal precursors, and then ascorbic acid is quickly added for reduction in an oil bath at 95 DEG C. After reaction, washing and drying, the catalyst is obtained. The method has the advantages of simple process and convenient operation. The obtained catalyst has high activity and selectivity in catalytic degradation of polylactic acid waste plastics under alkaline conditions, can efficiently upgrade and convert the polylactic acid waste plastics into acetic acid, provides a new way for resource utilization of waste plastics, and has good environmental protection and resource recycling prospects.

This invention provides a hydrogen sensor based on nanoparticles, its preparation method, and its application, belonging to the field of hydrogen sensor technology. The nanoparticle-based hydrogen sensor provided by this invention includes a substrate and at least one pair of electrodes spaced apart on the surface of the substrate. The substrate surface between the electrodes is covered with nanoparticles, and the electrode surfaces and nanoparticle surfaces are covered with a thin film layer. The nanoparticles include one or more of palladium nanoparticles, platinum nanoparticles, and alloy nanoparticles, wherein the alloy nanoparticles contain palladium and / or platinum. The material of the thin film layer includes one or more of polymethyl methacrylate, naphthol, silica, alumina, polytetrafluoroethylene, diamond-like carbon film, silicon nitride, and silicon carbide. The nanoparticle-based hydrogen sensor provided by this invention has high sensitivity and excellent stability, enabling rapid and accurate determination of hydrogen in an air environment.

A nitrogen-doped carbon-supported high-entropy alloy nanoparticle electrocatalyst, its preparation method, and its application are disclosed. The catalyst uses nitrogen-doped carbon as a support, on which high-entropy alloy nanoparticles, a single-phase solid solution formed by five metal elements—platinum, copper, iron, cobalt, and nickel—are loaded. The preparation method mainly includes: first, preparing the nitrogen-doped carbon support; then, mixing it with a metal salt precursor and drying it; finally, subjecting the mixture to instantaneous high-temperature thermal shock treatment using Joule heating technology, which forces the various metal atoms to dissolve mutually during ultra-rapid heating and cooling, forming a homogeneous alloy that is firmly loaded onto the support. This method effectively solves the problems of easy phase separation, long cycle, and easy agglomeration of nanoparticles in traditional high-entropy alloy synthesis. The prepared catalyst exhibits excellent catalytic activity in the electrochemical hydrogen evolution reaction, reaching 10 mA / cm² under acidic conditions, for example. 2 The required current density is only 13 mV overpotential. This invention offers a simple and efficient process, providing a new approach for the preparation of high-performance, low-cost electrocatalysts.

This invention discloses a chiral gold-silver-platinum alloy nanomaterial, its preparation method, and its applications, relating to the field of metal nanomaterials technology. The invention includes: a substrate, wherein the substrate is chiral helical gold-silver alloy nanoparticles, and the substrate has a left-handed or right-handed helical morphology; and platinum nanoparticles, wherein the platinum nanoparticles are selectively deposited on the helical edges of the substrate by photodeposition, and the chiral helical morphology of the substrate is preserved after deposition. The photodeposition method is a photodeposition reaction performed under circularly polarized light irradiation with a specific helical direction. This invention provides more active sites for catalytic reactions and effectively avoids the displacement etching of the gold-silver alloy shell by platinum in traditional deposition methods, preserving the complete helical chiral structure.

The application discloses a kind of carbon-nitrogen modified hydroxyapatite as carrier preparation and its application in 1,4-cyclohexane dimethyl alcohol preparation nickel-indium catalyst. The carbon-nitrogen layer modification strategy is applied to hydroxyapatite in the present application, which greatly improves the dispersion and particle size distribution of nickel-indium alloy nanoparticles on the surface of hydroxyapatite, further improves the catalyst activity. In addition, the present application introduces indium into the nickel-based catalyst to form nickel-indium alloy. Indium will transfer electrons to nickel, further enhancing the hydrogenation deoxidation ability of nickel to ester. The catalyst of the present application realizes the efficient conversion of PET and its derivatives to CHDM under relatively mild conditions, and CHDM can be obtained with excellent yield and selectivity.

The application discloses a preparation method of a low-noble-metal heterojunction fuel cell catalyst, which comprises the following steps: (1) preparing Pt-Co alloy nanoparticles; (2) preparing a cobalt acetate ethanol solution, placing the Pt-Co alloy nanoparticles in the cobalt acetate ethanol solution, stirring, growing a cobalt acetate film layer on the outer surface of the Pt-Co alloy nanoparticles, and obtaining the low-noble-metal heterojunction fuel cell catalyst. The preparation method can effectively reduce the use of Pt, reduce the preparation cost of the catalyst, and is suitable for large-scale application. The low-noble-metal heterojunction fuel cell catalyst has high oxygen reduction activity and can effectively improve the catalytic reaction efficiency.

The application belongs to the technical field of supported catalysts, and discloses a modified alumina-supported platinum-based alloy catalyst, a preparation method and application thereof, the catalyst is loaded with PtP alloy nanoparticles on a P-modified Al2O3 carrier, the micro composition of the PtP alloy nanoparticles is Pt1P3, the mass percentage of Pt in the catalyst is 0.1-0.5 wt%, and the mass percentage of P is 1.2-4.8 wt%. In the catalyst preparation process, the step-by-step impregnation and reduction method is adopted, the Al2O3 is sequentially impregnated in aqueous solutions of diammonium hydrogen phosphate and chloroplatinic acid, and after drying, calcination and high-temperature reduction, the PtP / P-Al2O3 catalyst is obtained. The catalyst is suitable for the reaction of propane dehydrogenation to propylene under a hydrogen atmosphere, the propane conversion rate is high, the propylene selectivity is higher than 90%, and after multiple cyclic regeneration, the catalyst can still restore the initial performance.

This invention discloses a high-entropy alloy nanoparticle-supported nitrogen-doped carbon fiber membrane composite material, its preparation method, and its application. Polyacrylonitrile (PAN) is dissolved in N,N-dimethylformamide (DMF) to obtain a matrix solution. Iron, cobalt, nickel, copper, and manganese salts are added to the matrix solution in an equimolar ratio and stirred until homogeneous, yielding an electrospinning precursor solution. The electrospinning precursor solution is then used to prepare a metal-based PAN spun membrane via electrospinning. Finally, the metal-based PAN spun membrane is subjected to pre-oxidation and calcination treatments to obtain the high-entropy alloy nanoparticle-supported nitrogen-doped carbon fiber membrane composite material (FeNiCoCuMn@NC). Benefiting from its continuous interconnected network structure and abundant active sites, this material can efficiently adsorb and catalyze the conversion of lithium polysulfides, suppress the shuttle effect, and simultaneously improve electrode conductivity and alleviate electrode volume expansion. The product obtained by this invention exhibits high specific capacity, excellent rate capability, and cycling stability.

This invention discloses a high-throughput screening and construction method for intermetallic compound Pt3M alloy catalysts, and their applications. The Pt3M alloy catalyst includes a support and an active component supported on the support; the support is a nitrogen-doped activated carbon support; the active component is chemically ordered Pt3M alloy nanoparticles. This invention also discloses the preparation method and applications of the Pt3M alloy catalyst. The active component of the Pt3M alloy catalyst of this invention contains chemically ordered Pt3M alloy nanoparticles, which greatly improves atom utilization compared to traditional catalysts, achieving a reduction in the amount of precious metal. The catalyst synthesized by this invention has a relatively high active metal content and relatively good stability, exhibiting excellent oxygen reduction reaction catalytic activity. The preparation method of this catalyst is simple and easy to synthesize, with uniform dispersion of the active metal Pt, significantly reducing labor costs, and is easy to scale up, showing promise for gram-scale catalyst preparation.

The application discloses a method for plasma treating a low-Pd supported catalyst and application of the method in hydrogen production by methanol steam reforming. The method for plasma treating the low-Pd supported catalyst comprises the following steps: (1) a Pd precursor solution is impregnated onto a ZnTiO3 carrier by using an equal-volume impregnation method, and the obtained mixture is dried and calcined to prepare a Pd / ZnTiO3 catalyst precursor; and (2) the Pd / ZnTiO3 catalyst precursor is placed in an atmospheric pressure intelligent fixed bed experimental device equipped with a plasma generator, and plasma discharge treatment is carried out under an H2 / Ar mixed gas atmosphere. The catalyst provided by the application comprises a ZnTiO3 carrier and PdZn beta alloy nanoparticles supported on the carrier, the PdZn beta alloy nanoparticles have a particle size of 3-5 nm, and the Pd metal dispersion degree is 40-60%. The method provided by the application realizes reduction and dispersion of Pd species under low-temperature and low-power conditions, effectively inhibits agglomeration of metal particles, and significantly improves the hydrogen production activity of the catalyst in methanol steam reforming.

This invention belongs to the field of solid-state battery technology, disclosing an alloyed composite current collector, its preparation method, and a solid-state battery. The alloyed composite current collector of this invention comprises a 3D carbon material current collector and a lithium-phobic polymer layer disposed on the surface of the 3D carbon material current collector. The 3D carbon material current collector includes 3D carbon material as a carrier and lithium-phobic alloy nanoparticles loaded thereon. The raw materials for preparing the lithium-phobic polymer layer include polymers, lithium salts, and solvents. During the electrochemical process, the alloyed composite current collector of this invention can construct a stable SEI film rich in inorganic matter in situ and form specific ion transport channels, ensuring that lithium metal can achieve uniform and dense deposition. This fundamentally solves the problems of dendrite formation, side reactions, and volume expansion, thereby enabling the preparation of solid-state batteries with high energy density, high safety, and long cycle life.

The application provides a high-entropy alloy composite material applied to microwave absorption and a preparation method thereof, relates to the technical field of electromagnetic wave absorption, and constructs a composite structure by introducing high-entropy alloy nanoparticles into a three-dimensional framework of graphene material, forms high-entropy alloy nanoparticles through a heat treatment process, and further composites the high-entropy alloy nanoparticles with the graphene material to construct a three-dimensional network material system with rich interface structures and multistage pores; the structure can not only provide a good conductive network and multiple scattering paths, but also can significantly improve the electromagnetic wave absorption performance of the material through the synergistic effect of various mechanisms such as interface polarization, conduction loss and magnetic loss; the problems that the current single graphene material is prone to strong dielectric loss, easy to cause impedance mismatch imbalance, thereby limiting the further improvement of the wave absorption performance, and the traditional high-entropy alloy is usually prepared by vacuum melting or mechanical alloying, and has problems such as large particle size, poor dispersity and difficulty in constructing a porous structure are solved.

This invention discloses a high-entropy alloy nanoparticle-reinforced skeletal structure aluminum alloy material and its preparation method, relating to the field of aluminum alloy and composite materials technology. The aluminum alloy material of this invention contains dispersed high-entropy alloy nanoparticles. The specific preparation method is as follows: first, a contact medium is applied to the surface of the high-entropy alloy particles; then, the high-entropy alloy particles with the contact medium are sprayed into refined aluminum or aluminum alloy melt, followed by ultrasonic treatment to obtain a melt to be cast; the melt to be cast is then cast to obtain the aluminum alloy material of this invention. This invention couples the high hardness and high strength of the high-entropy alloy with the high plasticity of the aluminum alloy to form synergistic reinforcement. Simultaneously, the contact medium acts as an intermediate bridge to form directional short-range diffusion, not only constructing a high-strength, wear-resistant skeletal structure between aluminum and the high-entropy alloy, but also solving the interfacial bonding problem between the two. This method obtains a three-dimensional continuous skeletal structure with dispersed high-entropy alloy nanoparticles, and significantly enhances the comprehensive performance of aluminum and aluminum alloys.

The invention belongs to the technical field of medicines, and relates to hydrogen-producing acid-resistant liquid metal particles and a preparation method and application thereof. The hydrogen-producing acid-resistant liquid metal particle comprises a liquid gallium-indium alloy nanoparticle, a hyaluronic acid layer wrapping the liquid gallium-indium alloy nanoparticle and a sodium alginate layer wrapping the hyaluronic acid layer, and the hydrogen-producing acid-resistant liquid metal particle can completely pass through gastric juice and trigger hydrogen to be continuously released in a colon alkalescence environment, so that intestinal mucosa injury is repaired, and the intestinal mucosa healing effect is improved. The disordered intestinal flora can be improved.

This invention relates to an ultrastable supported oxygen evolution electrocatalyst based on a ripening intercalation method, which is prepared using the following method: using a single metal oxide AO that remains stable under strong acid and strong oxidizing conditions. x Or mixed metal oxide A Y B Z O x Using noble metal atoms M or their alloys as the active component, a ripening-induced intercalation technique is employed to simultaneously control the growth of the support and the nucleation of the active component, thereby embedding noble metal or their alloy nanoparticles into a metal oxide support to obtain a metal oxide-supported catalyst M-AO. x This invention employs a ripening-induced intercalation technique to embed noble metal or alloy nanoparticles into different metal oxide supports, forming a stable and highly efficient supported catalyst. The catalyst developed in this invention maintains high catalytic activity and stability under strong acid and high current density environments, demonstrating broad application prospects, particularly in the field of green hydrogen energy.

This invention discloses a catalyst supported on carbon-loaded Pd nanoparticles or PdNi alloy nanoparticles, its preparation method, and its application, belonging to the field of chemical engineering technology. The preparation method includes: preparing an aqueous solution of a metal salt by adding water to a metal salt and a surface modifier; mixing the aqueous solution of the metal salt and an aqueous solution of a reducing agent under enhanced mass transfer conditions, reacting to obtain a Pd / PdNi alloy nanoparticle dispersion; immersing a support in the dispersion to obtain a precursor; then removing the solvent, washing, and calcining to obtain the catalyst supported on carbon-loaded Pd / PdNi alloy nanoparticles. This invention also discloses the catalyst supported on carbon-loaded Pd nanoparticles or the catalyst supported on carbon-loaded PdNi alloy nanoparticles prepared by the above method, and its application as a hydrogenation catalyst. The Pd and PdNi alloy nanoparticles in the catalyst of this invention have high crystallinity / alloying degree, small particle size, and uniform distribution; good catalytic effect, improved catalyst lifetime and loading stability, and reduced catalyst cost.

Provided are Ag-Pd alloy nanoparticles having improved migration resistance, and a method for producing the Ag-Pd alloy nanoparticles. One embodiment of the present invention relates to Ag-Pd alloy nanoparticles and a method for producing the same, the Ag-Pd alloy nanoparticles comprising, on the particle surface, an Ag-Pd solid solution phase in which Ag and Pd are solid-solved, and a Pd-rich phase, the content of Pd being 30 at% or more relative to the number of atoms of Ag on the particle surface.

The application discloses a titanium-based PtMn-Ag composite electrode and a preparation method thereof, and comprises a titanium base and a composite catalyst layer loaded on the surface of the titanium base; wherein the composite catalyst layer is composed of PtMn alloy nanoparticles and elemental Ag nanoparticles; the PtMn alloy nanoparticles and the elemental Ag nanoparticles are dispersedly distributed on the surface of the titanium base, the PtMn alloy nanoparticles are ordered intermetallic compound structures, and at least part of the elemental Ag nanoparticles is embedded on the surface of the PtMn alloy nanoparticles or anchored at the grain boundaries of the PtMn alloy nanoparticles, so that the technical problems that the catalyst activity, selectivity and long-term stability are difficult to be synergistically improved and the utilization rate of noble metals is low in the process of electrocatalytic oxygen reduction for synthesizing hydrogen peroxide in the prior art are solved.

The application discloses a two-dimensional nitrogen-doped carbon material loaded rhenium-based alloy nanoparticle electrocatalyst, and a preparation method thereof. The preparation method comprises the following steps: dissolving a rhenium-based metal salt, a transition metal salt, a purine small molecule and an inorganic salt in water to perform a hydrothermal reaction, so as to obtain a two-dimensional structure precursor; and calcining the two-dimensional structure precursor under the protection of an inert gas, so as to obtain the electrocatalyst. The high-melting-point rhenium metal is used to form alloy nanoparticles with the transition metal, so that the defects of sintering of the transition metal-based catalyst in a high-temperature synthesis process can be effectively avoided, the aggregation and growth of the alloy nanoparticles in the high-temperature synthesis process are prevented, the alloy nanoparticles are uniformly and highly densely loaded on the surface of a two-dimensional carbon nitride carrier, the proportion of surface metal atoms is greatly increased, and finally, the prepared electrocatalyst has good hydrogen evolution reaction catalytic activity and catalytic stability.

A catalyst may include ruthenium, oxygen, and a dopant, wherein the dopant comprises a transition metal. The catalyst may further include iridium. A method of making the catalyst may include impregnating ruthenium precursors and dopant precursors on a support, reducing the ruthenium precursors and the dopant precursors to obtain alloy nanoparticles supported on the support and including an alloy of ruthenium and the dopant, annealing the alloy nanoparticles and the support to remove the support and to convert the alloy nanoparticles to an intermediate mixed oxide including ruthenium, oxygen and the dopant, and leaching the intermediate mixed oxide to remove unstable dopant and obtain the catalyst.

The application provides a preparation method of a carbon material catalyst of a noble metal / transition metal alloy rich in dislocation defects in situ, comprising the following steps: preparing a covalent organic framework (COFs) matrix by using a Schiff base reaction; mixing the obtained COFs matrix with noble metal salt, transition metal salt and zinc nitrate, and drying to obtain a COFs precursor of an anchoring metal ion; rapidly heating the COFs precursor of the anchoring metal ion to a preset temperature by using Joule heating, then keeping the temperature at the preset temperature for a preset time, and finally rapidly cooling; repeating the Joule heating process for a preset number of times; and under the condition of high-temperature short-time thermal shock synthesis, obvious stress and strain are generated in the noble metal / 3d transition metal alloy, the interplanar spacing is compressed, serious lattice distortion is caused, a large number of crystal dislocation defects are induced in the alloy nanoparticles, and the original atomic arrangement mode is significantly rearranged.

The application provides a gold-silver alloy nanoparticle and a preparation method and application thereof, and the preparation method comprises the following steps: reacting water, silver sulfide quantum dots and polyvinylpyrrolidone powder at 0 DEG C until the reaction is sufficient, centrifuging, and obtaining a silver sulfide supernatant; mixing chloroauric acid, a sodium citrate solution and a NaOH solution at room temperature until the reaction is sufficient, and obtaining a reaction liquid; mixing the obtained silver sulfide supernatant and the obtained reaction liquid, adding polyvinylpyrrolidone, adding a hydroxylamine hydrochloride solution and a NaOH solution in sequence after reaction, fully reacting, and obtaining gold-silver alloy ions; and purifying the obtained gold-silver alloy ions, so that the gold-silver alloy nanoparticle is obtained. The preparation method adopts an aqueous phase method to synthesize the gold-silver alloy nanoparticle, the synthesis process is simple, green and environment-friendly, and the synthesis means of the gold-silver alloy nanoparticle is enriched; and the gold-silver alloy nanoparticle has potential application in the research of Alzheimer's disease and can effectively inhibit the incorrect folding of A beta 40 protein.

This invention relates to the fields of inorganic chemistry and catalytic chemistry, and discloses a supported catalyst and its preparation method, as well as a method for the gas-phase epoxidation of propylene. The catalyst comprises a titanium-silicon molecular sieve and gold-tin alloy nanoparticles supported on the titanium-silicon molecular sieve; wherein, based on the total weight of the catalyst, the gold content is 0.01-1 wt%, and the tin content is 0.01-1 wt%; wherein, the proportion of 0-valent Au in the gold element is >95%. The catalyst provided by this invention exhibits high catalytic activity in the gas-phase epoxidation of propylene, with a propylene conversion rate as high as 12-18% and a propylene oxide selectivity of 85-95%.

The application discloses a kind of three-dimensional through porous Ni4Mo / C alloy electrode materials and preparation method thereof, it is characterized in that, the electrode material is three-dimensional through porous Ni4Mo / C alloy electrode material in situ growth on the nickel foam metal skeleton, the three-dimensional through porous Ni4Mo / C alloy electrode material is by Ni4Mo / C alloy nanoparticle and carbon material of graphite structure composite into porous nanosheet structure, then in situ assembly assembly is formed three-dimensional through porous structure, using liquid precursor in situ one-step reduction alloyization is obtained, first, foam nickel is washed pretreatment, after drying, NiCl2 6H2O, MoCl2, urea, hexamethylenetetramine are continuously stirred and heated in oil bath, form uniform liquid, a certain amount of liquid is evenly coated on the surface of hydrochloric acid pretreated foam nickel, in-situ pyrolysis reaction is carried out under nitrogen atmosphere, and three-dimensional through porous Ni4Mo / C alloy electrode material is obtained.The prepared three-dimensional through porous Ni4Mo / C alloy electrode material has good water electrolysis hydrogen production performance in wide pH range, and is used for clean energy hydrogen production technology in green technology.

The application belongs to the technical field of solid oxide electrolysis cell, and particularly relates to a preparation method of a NiFe-YSZ electrolysis cell fuel electrode and application thereof. The application adopts an iron nitrate precursor solution to impregnate and modify a Ni-YSZ porous framework, and after high-temperature reduction, in-situ formation of uniformly dispersed NiFe alloy nanoparticles under an electrolysis atmosphere, a NiFe-YSZ composite fuel electrode structure is constructed. The fuel electrode prepared by the application can significantly improve the catalytic activity and reaction kinetics performance of CO2-H2O co-electrolysis, reduce the polarization loss, simultaneously inhibit the Ni particle coarsening and oxidation, maintain the integrity of the three-phase interface, and the electrolysis current density can reach 2075.45 mA / cm 2 at 800 DEG C and 1.3 V electrolysis voltage, the electrolysis current density can reach 510 mA / cm 2 at 800 DEG C, and the constant current can be stably operated for 100 h without attenuation, which is suitable for renewable energy conversion, CO2 resource utilization and other fields, and has a good engineering application prospect.

This invention relates to novel applications of Pd / Ir alloy nanoparticles, specifically their use in the preparation of sensitizing agents for tumor radiotherapy and / or photothermal therapy. In particular, hydrogen-loaded Pd / Ir alloy nanoparticles can significantly enhance the sensitizing effect of radiotherapy and / or photothermal therapy, thereby further achieving anti-tumor effects.

This invention provides Ag-Pd alloy nanoparticles with improved migration resistance and a method for producing the same. [Solution] One aspect of the present invention relates to Ag-Pd alloy nanoparticles comprising an Ag-Pd solid solution phase and a Pd-rich phase in which Ag and Pd are solidly dissolved on the particle surface, wherein the Pd content relative to the number of Ag atoms on the particle surface is 30 atomic percent or more, and to a method for producing the same.

The application relates to an alloy supported catalyst for electrocatalysis of CO2 and a preparation method and application thereof. The catalyst comprises hollow porous carbon spheres and alloy active components supported on the outer surfaces of the hollow porous carbon spheres; the inner diameter of the hollow porous carbon spheres is 210-250 nm; the outer diameter is 280-320 nm; the specific surface area is 500-600 m 2 g ‑1 ; the alloy active components are pure-phase Cu6Sn5; the loading amount is 4.5-5.6 wt.%; and the overall morphology feature is that alloy nanoparticles are supported on the surfaces of the porous hollow carbon spheres. Through CO2 electro-reduction test on the prepared catalyst, the catalyst shows superior formic acid product activity and selectivity, and the selectivity of formic acid in the product is kept above 90% at a local potential. The hollow carbon spheres make the catalyst have excellent stability. The Cu6Sn5 alloy is a key, and the supporting on the hollow porous carbon spheres improves the stability and conductivity of the electrode material.