76results about How to "Improve catalytic stability" patented technology

According to the nickel-based catalyst and the preparation method and application thereof, through Ga modification, the methane cracking depth can be reduced, and then carbon deposition is effectively inhibited; ceO2 oxygen vacancies can effectively activate CO2, the generated intermediate oxygen species O further reacts with deposited carbon so as to achieve the purpose of carbon cleaning, the GaxNi / CeO2 catalyst is prepared by adopting a urea homogeneous precipitation method, 1000-hour long-term stable catalytic conversion of the nickel-based catalyst in a carbon dioxide methane dry reforming reaction is achieved, and the catalyst has the advantages of simple process, low cost and high efficiency. The nickel-based catalyst prepared by the method can keep good catalytic stability.

The application discloses a kind of delta-MnO2-GO catalyst and its preparation method and application in room temperature formaldehyde degradation, it is related to inorganic catalyst technical field.The preparation method of delta-MnO2-GO catalyst of the application can significantly limit the growth of manganese dioxide nanosheet by doping with low amount of GO, to manufacture abundant mass transfer transmission channel, delta-MnO2-GO catalyst presents unique two-dimensional crown structure, two-dimensional coral-like hierarchical pore structure delta-MnO2 nanorod is uniformly dispersed on the GO of plane structure, greatly promote the exposure of catalytic site and the mass transfer of reactant, produce a large number of surface active oxygen ROS and hydroxyl radical-OH, greatly maintain the excellent catalytic activity and stability to HCHO degradation, stably realize nearly 100% HCHO elimination at room temperature.

The application discloses a preparation method of a palladium-iron-based catalyst. A carbon carrier is added into an iron precursor solution, and after impregnation, solid-liquid separation, washing, drying and calcination in an oxygen-containing atmosphere, an iron and carbon mixed carrier is obtained. Then the mixed carrier is impregnated in a palladium precursor solution, and after separation, washing and drying, the palladium-iron-based catalyst is obtained after reduction. The palladium-iron-based catalyst prepared by the method has high dispersion and stable palladium. In the reaction of selective hydrogenation of phenol to cyclohexanone, the conversion rate of phenol and the yield of cyclohexanone are both higher than 95%, and the catalyst has good catalytic stability.

The invention discloses a rare earth tailing-based aerogel catalyst for refractory coal and a preparation method thereof, and the preparation method comprises the following steps: a, pretreating rare earth tailings rich in cerium oxide to obtain raw material powder; b, carrying out modification treatment on the raw material powder obtained in the step a to obtain modified powder; and c, preparing rare earth tailing-based aerogel from the modified powder obtained in the step b, and grinding to obtain the catalyst. The rare earth tailing-based aerogel catalyst prepared by the invention has a relatively high specific surface area and a rich pore structure, obviously improves the combustion efficiency of fire coal, can be suitable for fire-retardant solid fuel, realizes wide-load stable combustion of fire-retardant coal powder, expands the coal type adaptability of a unit, reduces the use amount of long flame coal, and reduces the production cost. The coking problem is effectively solved.

This invention discloses a two-step hydrothermal method for preparing nickel-iron bimetallic MOF derivatives and its application. By controlling the precursor structure through a two-step hydrothermal strategy, the nickel-iron bimetallic MOF derivative catalyst forms a foam-like hierarchical porous carbon framework. The metal nanoparticles are uniformly dispersed, small in size, and encapsulated by carbon layers, significantly improving the specific surface area and accessibility of active sites. It exhibits excellent hydrogen yield and anti-carbon deposition performance in plastic pyrolysis tar reforming. The synergistic effect of nickel and iron electrons effectively inhibits metal sintering and carbon deposition, and has good catalytic stability. This invention solves the problem in existing nickel-iron bimetallic MOF derivatives where phase separation easily occurs in one-step synthesis due to the difference in nucleation and growth rates between nickel and iron ions and organic ligands, leading to uneven metal distribution, increased particle size, underdeveloped pore structure, and low accessibility of active sites, thus affecting catalytic reforming activity and anti-carbon deposition ability.

The present application relates to a kind of metal single atom and nanoparticle composite catalyst and its preparation method.By the reasonable proportioning of metal salt, dicyanediamine and urea dosage, high loading single atom and nanoparticle composite catalyst is prepared by simple two-step pyrolysis method, the preparation method is simple, metal loading can be controlled, with good reproducibility and applicable to a variety of metal salt (such as Co, Cu, Ni, Fe, Mn, etc.).Single atom and nanoparticle composite catalyst obtained by the present application can construct a large number of active sites, significantly improve the catalytic activity and stability of catalyst, for degrading sulfonamide organic pollutants, quinolone organic pollutants and tetracycline organic pollutants, or for depolymerization lignin, all of which show excellent catalytic activity, and the degradation or depolymerization effect is higher than that of currently reported catalyst.

This invention relates to the field of catalyst preparation, and discloses a methanation catalyst, its preparation method and application, and a methanation method. The methanation catalyst contains a catalyst support and a nickel active component. Based on the total mass of the methanation catalyst, the catalyst support comprises 80-90 wt% by mass, and the nickel active component (calculated as oxide) comprises 10-20 wt% by mass. The average mechanical strength of the catalyst support is 35-80 N / mm. The particle mechanical strength dispersion coefficient of the catalyst support is in the range of 0-0.55. The catalyst support has a large specific surface area and pore volume. Combined with the supported nickel active component, it can improve the catalytic activity and selectivity of the catalyst. Simultaneously, the catalyst has high average mechanical strength, resulting in high CO conversion and methane selectivity in the methanation reaction.

The invention discloses a sulfur-tolerant platinum-based catalyst and a preparation method thereof, and the preparation method of the sulfur-tolerant platinum-based catalyst comprises the following steps: weighing roasted ZrO2 as a carrier, weighing ammonium metatungstate, completely dissolving in deionized water, dropwise adding the solution until the carrier is completely immersed, and carrying out ultrasonic treatment; standing at room temperature, drying, and roasting in air at 500-600 DEG C to prepare a tungsten oxide loaded solid acid composite carrier WO3-ZrO2; and weighing chloroplatinic acid, completely dissolving the chloroplatinic acid in deionized water, dropwise adding the solution into the composite carrier, completely immersing the composite carrier, carrying out ultrasonic treatment, standing at room temperature, drying, and roasting in air at 250-350 DEG C to obtain the sulfur-tolerant platinum-based catalyst. The catalyst is simple in preparation method, has relatively strong tolerance to different sulfur species, and has good low-temperature catalytic performance and catalytic stability to low-carbon alkane.

The invention discloses a copper-silicon catalyst for plasma treatment as well as a preparation method and application of the copper-silicon catalyst. According to the method, a copper-silicon catalyst precursor prepared by a traditional ammonia distillation method is subjected to dielectric barrier discharge plasma treatment in the atmosphere of H2 / Ar and the like, and traditional high-temperature roasting and reduction processes are replaced. According to the method, efficient reduction and high dispersion of copper can be achieved at the room temperature, the Cu < + > / Cu0 proportion is regulated and controlled, and the strong interaction between metal and a carrier is enhanced. The catalyst is used in a reaction for preparing ethylene glycol through hydrogenation of dimethyl oxalate, the activity, selectivity and stability of the catalyst are higher than those of a traditional heat treatment catalyst, the dimethyl oxalate conversion rate reaches up to 100%, the ethylene glycol selectivity is larger than 97%, and the stability reaches 1000 h or above. The method is simple in process, low in energy consumption and environment-friendly, and has a wide industrial application prospect.

The application provides a self-supporting Ni-Fe-Mn oxygen evolution electrocatalyst and a preparation method thereof, and belongs to the technical field of catalytic material preparation. The Ni, Fe and Mn metal raw materials are repeatedly smelted, and after smelting, suction casting is carried out to obtain a cast plate. The cast plate is subjected to homogenization treatment, and then is cut and polished. Finally, etching is carried out in a nitric acid solution to obtain the self-supporting Ni-Fe-Mn oxygen evolution electrocatalyst. The self-supporting electrocatalyst is prepared by the method of arc smelting, heat treatment and chemical etching, and has the advantages of simple preparation process, easy industrialization, adjustable size, excellent stability and excellent OER performance.

This invention discloses a supported boron-doped palladium oxide cluster catalyst, its preparation method, and its application. The preparation method includes optimizing the geometry and electronic structure of the Pd clusters through Pd precursor regulation and B atom doping. The B-doped Pd oxide cluster material substrate is carbon nitride, the Pd cluster loading is 0.5-2%, and B atoms are distributed in the Pd clusters. The molar ratio of B to Pd atoms is 0.01-0.2:1, and the average valence of Pd atoms is Pd₂. 1+ -Pd 4+ This catalyst can efficiently mineralize perfluorooctanoic acid and other carboxylic acid perfluorinated compounds in water through a chain reaction of decarboxylation coupled with hydroxylation and defluorination under normal temperature and pressure. The defluorination rate exceeds 95%, and its activity is not affected by environmental factors such as ions, dissolved organic matter, and pH in the water. The catalyst is suitable for the removal of perfluorocarboxylic acids from surface water, groundwater, or industrial wastewater, and has the advantages of simple operation, high efficiency, and good stability.

This invention discloses a method and its application for controlling the bending degree of a two-dimensional cobalt four-coordinate conjugated compound on a three-dimensional tubular carbon material. The specific procedure involves ultrasonically dispersing a three-dimensional honeycomb-structured tubular carbon material in methanol, and dispersing the two-dimensional cobalt four-coordinate conjugated compound in methanol. The dispersion of the two-dimensional cobalt four-coordinate conjugated compound is slowly added dropwise to the dispersion of the three-dimensional honeycomb-structured tubular carbon material, while magnetic stirring. The solution is filtered and washed with methanol. Finally, the resulting solid is dried in a vacuum drying oven to obtain a composite structure of the two-dimensional cobalt four-coordinate conjugated compound and the three-dimensional honeycomb-structured tubular carbon material. This invention modifies the bending strain of the two-dimensional cobalt four-coordinate conjugated compound on the three-dimensional honeycomb-structured tubular carbon material by controlling the diameter of the tubular material. The preparation method is simple, efficient, environmentally friendly, and low-cost.

The invention relates to the technical field of monatomic catalysis, and discloses a monatomic catalyst as well as a preparation method and application thereof. The monatomic catalyst comprises a nitrogen-doped porous carbon carrier and transition metal dispersed on the surface of the nitrogen-doped porous carbon carrier in a monatomic form; wherein the loading capacity of the transition metal is 0.2-2% by mass; on the basis of the total amount of the catalyst, the content of nitrogen in the nitrogen-doped porous carbon carrier is 0.5-4% by mass. Transition metal in the monatomic catalyst is uniformly dispersed on the surface of the nitrogen-doped porous carbon carrier in a monatomic form, and the monatomic catalyst has high activity and high stability when being used as a catalyst for an electrocatalytic oxygen reduction reaction, a hydrogen evolution reaction, an oxygen evolution reaction or a fuel cell.

The application discloses a kind of for sweat glucose concentration monitoring method, it is related to sweat monitoring field, comprising the following steps: step 1, enzyme-fixed chain conjugate synthesis: glucose dehydrogenase is reacted with bilirubin oxidase respectively with bifunctional crosslinking agent and is purified, obtain enzyme-crosslinking agent intermediate;It is clicked with azide modified DNA fixed chain chemistry reaction again, and after purification, obtain GDH-fixed chain and BOx-fixed chain conjugate;Step 2, preparation of circular DNA template: after annealing hybridization of phosphorylated template chain and primer chain, it is connected into ring by T4 DNA ligase;Step 3, rolling circle amplification self-assembly package enzyme DNA hydrogel;The present application uses super-flexible DNA hydrogel as flexible electrode material, realizes the efficient fixation and continuous stable catalysis of GDH and BOx, and constructs flexible sweat-based EBFC self-powered sensor as flexible bioelectrode, to realize continuous non-invasive blood glucose monitoring.

This invention relates to the field of nanomaterials, specifically to a metal-organic framework composite material, its preparation method, applications, and a method for oxidative removal of organic sulfur from fuel oil. The composite material comprises Ce-MOF nanomaterials and MnO2 nanomaterials, wherein the weight ratio of MnO2 nanomaterials to Ce-MOF nanomaterials is 1:(13-15). In the X-ray photoelectron spectrum of the composite material, a characteristic peak exists at 530 eV for the O 1s spectrum. The composite material of this invention exhibits good synergistic effects between MnO2 nanomaterials and Ce-MOF nanomaterials, demonstrating excellent catalytic activity and stability.

The invention discloses an II-type heterojunction BiOBr / NiV-LDH composite photocatalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing NiV-LDH powder by adopting a hydrothermal method; the BiOBr / NiV-LDH composite photocatalytic material is further prepared by adopting a sol-gel method; the micro-morphology of the BiOBr / NiV-LDH composite photocatalyst is accurately regulated and controlled to be of an II-type heterojunction nanosheet structure by regulating and controlling key process parameters such as the reaction temperature and the reaction time of a sol-gel method; according to the structure, the specific surface area of the material is greatly increased, and then rich active sites are provided for photocatalytic reaction; in the prepared BiOBr / NiV-LDH composite photocatalytic material, an II-type heterojunction structure formed by BiOBr and NiV-LDH can obviously reduce the recombination rate of photo-induced electron-hole pairs, and the visible light response range of the material is effectively widened; meanwhile, NiV-LDH has excellent photo-generated hole capturing capability, can be used as a cocatalyst for surface oxidation reaction, and synergistically improves the photocatalytic performance, so that the composite material finally shows excellent catalytic activity and stability in the field of pollutant degradation.

The invention relates to the technical field of water electrolysis, and discloses a water electrolysis hydrogen evolution method which comprises the following steps: under a water electrolysis condition, taking a water electrolysis hydrogen evolution catalytic electrode as a working electrode to carry out water electrolysis reaction; the water electrolysis hydrogen evolution catalytic electrode comprises a conductive substrate and a catalytic material compounded on the surface of the conductive substrate, and the catalytic material comprises a carbon-coated platinum-based alloy nano material and conductive carbon black; the preparation method of the carbon-coated platinum-based alloy nano material comprises the following steps: (1) mixing tetraammineplatinum acetate, transition metal acetate, citric acid and a solvent under a stirring condition, carrying out a coordination reaction, and carrying out solid-liquid separation to obtain a product solution; (2) removing a solvent in the product solution, and drying to obtain a precursor material; (3) performing high-temperature pyrolysis on the precursor material in an inert atmosphere; and (4) contacting the high-temperature pyrolysis product with acid, and then optionally washing and drying. The method has relatively low reaction overpotential and relatively high reaction activity and stability.

The invention belongs to the technical field of synthesis of organic compounds, and relates to a synthesis method of drometrisiloxane, which comprises the following steps: carrying out Williamson etherification reaction on an ultraviolet light absorber UV-P and methyl allyl chloride to obtain an intermediate I; carrying out Claisen rearrangement reaction on the intermediate I to obtain an intermediate II; and carrying out hydrosilylation reaction on the intermediate II and heptamethyltrisiloxane to obtain dromethicone, the Williamson etherification reaction comprises the following steps: dissolving an ultraviolet light absorber UV-P in an alcohol ether solvent, and reacting with methyl allyl chloride under the condition of an acid-binding agent. According to the synthesis method of the drometrisiloxane, the etherification reaction is efficient, simple and convenient, the hydrosilylation reaction catalyst is high in efficiency, the solvent system is green and economical, the overall process is high in yield and purity, and the product quality is excellent.

The application belongs to the technical field of materials, and discloses a non-noble metal catalyst for biomass hydrogenation reaction, and a preparation method thereof, which comprises the following steps: adding A fuel and B metal salt into distilled water, heating, stirring and dissolving, and obtaining a gel along with water evaporation; placing the gel into a high-temperature device, and obtaining metal oxide powder with a spinel structure through a combustion reaction; and reducing the metal oxide powder, thereby obtaining the catalyst. The preparation method of the catalyst uses nitrate or acetate of the non-noble metal B as raw material, and A fuel is chelated with metal ions as a ligand during mixing and stirring, and uniformly disperses the metal ions, and is oxidized by the metal salt as fuel during the solution combustion synthesis, releases heat, decomposes to generate gas, and brings abundant mesopores to the obtained spinel oxide. The raw material is low in cost, green and environment-friendly, the preparation process is simple, the period is short, and the catalyst has great industrial application potential.

The application provides a hollow spherical nickel-iron oxide and a preparation method and an electrocatalyst thereof, and the preparation method comprises the following steps: mixing a nickel source, an iron source, a saccharide carbon source template agent and a solvent to obtain a precursor solution; performing spray atomization treatment on the precursor solution to obtain atomized droplets; performing pyrolysis treatment on the atomized droplets to obtain a pyrolysis product; and performing calcination treatment on the pyrolysis product to obtain the hollow spherical nickel-iron oxide. The amorphous nickel-iron oxide hollow microspherical catalyst is prepared by the method of saccharide carbon source template agent + spray pyrolysis, and through the synergistic effect of the amorphous structure and the hollow morphology, the specific surface area and the active site exposure are increased, the catalytic activity and stability are improved, the efficient and stable operation of the catalyst under medium and low temperature and high current density is realized, the actual demand of industrial hydrogen production is met, and the total cost of hydrogen energy production is reduced.

The application discloses a preparation method of a pyrrolidone derivative. Under the action of a non-precious bimetallic multifunctional catalyst, an acetylenic acid derivative shown in formula I is reacted with an amine, a nitro compound or a nitrile compound shown in formula II in a reaction solvent under the heating and stirring of hydrogen gas to prepare a pyrrolidone derivative shown in formula III, and a reaction formula is as follows: the non-precious bimetallic multifunctional catalyst is a nitrogen-doped carbon-based carrier NC derived from a metal-organic framework material ZIF-8 and an effective active ingredient embedded on the carrier NC; the effective active ingredient comprises two metals, one metal is Co, and the other metal is any one of Ni or Cu. The yield of the pyrrolidone derivative synthesized by the method can reach 77% to 100%. The method has the advantages of simple process, high selectivity of the target product, cleanness and environmental protection, small catalyst consumption, low cost, simple catalyst preparation, high catalytic stability and suitability for industrial production.

The application discloses a noble metal / metal fluoride sulfur-resistant catalyst, a preparation method thereof and application of the catalyst in catalytic oxidation of CO. The catalyst comprises a nano metal M fluoride carrier rich in surface F defects and a noble metal active component supported on the carrier. The noble metal active component is supported on the carrier in at least one of an oxide and an element form. The metal M is selected from at least one of Cr, Al, Ti and Mg. The noble metal loading in the catalyst is 0.1-2.0 wt%. The application constructs a strong interaction system of "noble metal-metal fluoride carrier", anchors Pt species by using the surface F defects of the nano metal fluoride carrier, and effectively prevents chemical adsorption of SO2 and other sulfides on the noble metal active sites and sulfation by means of the strong chemical stability of the fluoride and the electrostatic repulsion of the fluoride to sulfur species, so that the stability of the catalyst in catalytic oxidation of CO in a sulfur-containing atmosphere is remarkably improved.

The invention discloses a preparation method of a monatomic catalytic material and application of the monatomic catalytic material in degradation of bisphenol A. The method comprises the following steps: (1) adding acetic acid and zircon salt into an organic solvent containing terephthalic acid or ortho-substituted terephthalic acid, and reacting in a sealed environment at high temperature to obtain UiO-66-X; wherein the molar ratio of zircon salt to terephthalic acid or ortho-substituted terephthalic acid is less than 1; (2) soaking the UiO-66-X obtained in the step (1) in N, N-dimethylformamide, then soaking the UiO-66-X in acetone, centrifuging, washing, and carrying out vacuum drying overnight to obtain UiO-66-X powder; (3) dispersing the UiO-66-X powder in an organic solvent containing cobalt salt, carrying out ultrasonic dispersion, and reacting in a sealed environment at high temperature to obtain Co / UiO-66-X; and (4) firstly soaking the Co / UiO-66-X obtained in the step (3) in N, N-dimethylformamide, then soaking the Co / UiO-66-X in acetone, centrifuging, washing, and carrying out vacuum drying overnight to obtain Co / UiO-66-X powder.

The application relates to a high-entropy alloy carbon nanofiber material and a preparation method and application thereof. The preparation method of the high-entropy alloy carbon nanofiber material comprises the following steps: S1. polyacrylonitrile is prepared into first spinning liquid, electrostatic spinning is carried out, and first nanofiber film is prepared; S2. polyvinylpyrrolidone, a cobalt source, a nickel source, a copper source, a zirconium source and a metal M source are prepared into second spinning liquid, the second spinning liquid is electrostatically spun, the formed second nanofiber film is covered on one face of the first nanofiber film, and a composite nanofiber film is obtained; and S3. the composite nanofiber film is subjected to pre-oxidation and carbonization treatment, and the high-entropy alloy carbon nanofiber material is obtained. The high-entropy alloy carbon nanofiber material has good flexibility and good hydrogen evolution catalytic performance brought by high content of active substances, and the preparation method does not need to use noble metals as raw materials.

The application discloses a propane dehydrogenation catalyst, a preparation method and application, the propane dehydrogenation catalyst includes carrier and the Pt component, Sn component and alkali metal component supported on the carrier;The carrier is spherical activated carbon;The alkali metal component is selected from potassium and / or sodium. Wherein, the carrier is spherical activated carbon, the spherical activated carbon is 0.4-2.0mm spherical particle, the specific surface area of the spherical activated carbon is 500-2000m 2 / g, the pore volume is 0.55-1.5mL / g, has the micropore of 0.5-1.5nm, 4-10nm mesopore and 50-200nm macropore.The catalyst prepared by the application has higher catalytic activity, propylene selectivity and catalytic stability.

This application provides a highly sensitive and interference-resistant microsensor for ethylene monitoring, comprising a housing and a working electrode, a reference electrode, and a protective electrode disposed within the housing. One end of the housing is a detection tip, and the other end is a mounting end. The detection tip is sealed and filled with a breathable membrane layer. The housing is filled with a composite ionic electrolyte. The detection end of the working electrode is coated with a Pd-based doped composite nanolayer, which is applied to the detection end of a platinum wire substrate using a sputtering process. This application, through improvements to the electrode material, nanocoating process, and electrolyte system, effectively enhances the detection accuracy of the microsensor for ethylene detection, achieving nano-molar level accuracy, while also improving its interference resistance, coating stability, and service life.

The utility model discloses a kind of polypropylene catalyst production devices with mixing function belong to polypropylene catalyst production field, including reaction kettle, the inside of reaction kettle is equipped with stirring mechanism, the middle part of reaction kettle is equipped with heating grinding mechanism, the heating grinding mechanism includes two rotatingly connected in reaction kettle heat insulation plate, two the heat insulation plate is rotatably connected by hinge, the upper surface of heat insulation plate is attached with rotating plate;Through the cooperation of each device between above, start servo motor, grinding roller rotates itself, grinding roller is pulverized to gelatin, so that gelatin becomes powder, obtains polypropylene catalyst, not only makes polypropylene catalyst have high dispersibility and controllability, to improve the catalytic activity and stability of polypropylene catalyst, improve the performance of polypropylene catalyst, also make polypropylene catalyst direct grinding, reduce working step, to improve the production efficiency of polypropylene catalyst.

The invention relates to the field of preparation of Fischer-Tropsch synthesis catalysts, and discloses a packaged Fe-based catalyst as well as a preparation method and application thereof. The catalyst comprises iron oxide particles and a molecular sieve wrapping the iron oxide particles; the average particle size of the iron oxide particles is not greater than 20nm. The encapsulated Fe-based catalyst provided by the invention has relatively high catalytic activity and stability.

The invention relates to the technical field of catalyst preparation, and discloses a preparation method of a high-dispersion copper-based catalyst and application of the high-dispersion copper-based catalyst in preparation of CHDM, the preparation method comprises the following steps: (1) adding a copper salt, a manganese salt, an aluminum salt and a rare earth metal salt into water, and dissolving to obtain a mixed salt solution; sodium hydroxide and sodium carbonate are added into water to be dissolved, and a mixed alkali solution is obtained; (2) reacting the mixed salt solution and the mixed alkali solution in a micro-liquid membrane reactor, after the reaction is completed, carrying out crystallization reaction on the obtained suspension, and then centrifuging and drying to obtain a quaternary hydrotalcite precursor; and (3) roasting and reducing the quaternary hydrotalcite precursor to obtain the copper-based catalyst. According to the copper-based catalyst, Cu nanoparticles are highly dispersed on the surface of a composite metal oxide, the copper-based catalyst is applied to 1, 4-cyclohexanedicarboxylic acid dimethyl ester reaction hydrogenation for preparing 1, 4-cyclohexanedimethanol, excellent catalytic activity and stability are shown, and CHDM has a high trans-cis ratio.

This invention discloses a method for preparing and applying a non-high-temperature pyrolysis metal single-atom catalyst, comprising the following steps: dispersion: dispersing graphene oxide and a transition metal compound in an amide solvent to obtain a graphene oxide dispersion and a metal precursor dispersion; mixing: mixing the graphene oxide dispersion and the metal precursor dispersion, and homogenizing them under physical field-assisted treatment to obtain a mixed precursor suspension; solvothermal reaction: placing the mixed precursor suspension in a closed reaction vessel and performing a solvothermal reaction under autogenous pressure and heating conditions, and cooling after the reaction to obtain an intermediate product containing a metal-graphene hydrogel; purification and drying: washing and purifying the intermediate product with a polar solvent, followed by vacuum drying to obtain a non-high-temperature pyrolysis metal single-atom catalyst; grinding: grinding the obtained non-high-temperature pyrolysis metal single-atom catalyst into powder.