522 results about "Pore distribution" patented technology

The invention discloses a hydrotreating guard catalyst for residual oil and application thereof. The catalyst has the advantages of large pore volume, large aperture, high porosity, rational pore distribution, larger external orifice, high pore canal penetrability and over 36 percent of 1,000nm pore canals, and is particularly applied to a hydrotreating method of a residual oil fixed bed to ensure that precipitated metals are uniformly deposited on the whole catalyst bed and impurities, namely vanadium and calcium, can be deposited inside the pore canals so as to improve the utilization ratio of pores and maintain long-period running.

A catalyst for hydrogenated synthesis of glycollate with oxalate and a preparation method for the catalyst belong to the glycollate preparation technical field. The catalyst of the present invention uses the copper metal as the main active component, and silver as the promoter, and is manufactured with the method of immersion. A carrier of the catalyst is the modified silica sol. The select content of the copper metal is 5 to 45 percent of the carrier weight, and the optimal content of the copper metal is 10 to 40 percent. The content of silver metal is 0.1 to 15 percent of the carrier weight, and the optimal content of silver metal is 1 to 8.0 percent. The select carrier is the silica sol with a double peak pore distribution structure and the specific surface area of the carrier is 100-300m²/g; and the optimal specific surface area of the carrier is 120-240m²/g. The present invention settles the problem of applying a Cr/Cu catalyst in the oxalate gas-phase catalytic hydrogenation. Proven by experiments, the catalyst is provided with the very high reaction activity and glycollate selectivity in the reaction to synthesize glycollate with oxalate and hydrogen Moreover, the catalyst is provided with the long usable life and the stable reaction performance, and can be easily controlled.

This invention relates to a 4 group metal oxide and to a method for preparation thereof and the 4 group metal oxide prepared by adding a particle growth inhibiter to a hydrosol a hydrogel or a dried product of a hydrous 4 group metal oxide represented by MO(2-x)(OH)2x (wherein M denotes a 4 group metal and x is a number greater than 0.1 or x>0.1) followed by drying and calcining has a specific surface area of 80 m<2>/g or more, a pore volume of 0.2 ml/g or more and a pore sharpness degree of 50% or more and excellent heat stability and is useful for a catalyst or a catalyst carrier in which a catalyst metal is dispersed to a high degree. This invention further relates to a porous 4 group metal oxide and to a method for preparation thereof and the 4 group metal oxide prepared by application of a pH swing operation is characterized by a large specific surface area, excellent heat stability, high dispersion of a catalyst metal and a controlled and sharp pore distribution and is useful for a catalyst or a catalyst carrier of excellent reaction selectivity.

The invention relates to a porous carbon material and a preparation method thereof. The porous carbon material with fish scale as a raw material is prepared by using the organic and inorganic matters in fish scales as a carbon source and a natural template, and the particular method comprises the following steps: allowing dry fish scale to perform precarbonization at 300-350 DEG C; well mixing the precarbonized fish scale and an alkaline activator with a mass ratio of 1:0.5-1:3, performing activation and carbonization, performing post-treatment to remove inorganic salts, washing with deionized water to obtain a neutral solution, drying to obtain a carbon material with multilevel pore distribution. The preparation method of the invention is simple and low in cost, is applicable to industrial production; and the prepared porous carbon material is applicable to adsorption materials and super capacitors, and has a high adsorption quantity and a good specific energy rate property. The invention opens up a new way for the effective utilization of fish scale which is a waste in fishery.

The invention discloses a polyimide-base nano fibrous membrane which can be used as a lithium ion secondary battery membrane. The polyimide-base nano fibrous membrane is composed of polyimide nano fibers of which the diameters are 20-500 nanometers, the membrane thickness is 15-100 micrometers, and the air penetrability of the membrane is 10-500 seconds; and the pore distribution of the upper andlower surfaces and the inside is symmetrical and uniform, the average pore size is 100 nanometers, and the tensile strength is 100-250mpa. The invention also discloses a preparation method of the polyimide-base nano fibrous membrane. When being used as the lithium ion battery membrane, the polyimide-base nano fibrous membrane has favorable heat resistance, and can not produce the phenomenon of short circuit even at 150 DEG C; and therefore, the battery membrane disclosed by the invention is especially suitable for high-capacity and high-power lithium ion batteries.

The invention relates to a preparation method of a mesoporous X-type molecular sieve and a method for preparing an adsorbent by using the molecular sieve as an active component. The prepared adsorbent based on the mesoporous X-type molecular sieve is used as a paraxylene adsorptive separation adsorbent. The method for preparing the mesoporous X-type molecular sieve comprises the following steps: by using water glass as a silicon source and aluminum hydroxide as an aluminum source, adding a template, and carrying out hydrothermal synthesis to obtain the mesoporous X-type molecular sieve. The mesoporous molecular sieve and kaolin are proportionally molded to obtain 0.3-0.8mm granules, and the granules are subjected to barium ion or (and) potassium ion exchange until the exchange degree is greater than 99%, thereby obtaining the adsorbent which has excellent adsorptive separation capacity for paraxylene in C8 aromatic hydrocarbons. Compared with the prior art, the active component mesoporous X-type molecular sieve of the adsorbent, which is prepared by using the template, has the crystal form structure of the X-type molecular sieve and the pore distribution of the mesoporous and microporous dual models; the mesoporous pore size distribution is 2nm or so; and thus, the problem of overlow mass transfer rate in the adsorbent can be solved.

The invention relates to a method for selective hydrogenation of full-run pyrolysis gasoline, which mainly solves the technical problem in the prior art that it is difficult to selectively hydrogenate full-run pyrolysis gasoline with high colloid and free water content. The present invention adopts the pyrolysis gasoline and hydrogen of the hydrocarbon compound fraction with C5 hydrocarbon to dry point of 204 DEG C as raw materials, the reaction temperature is 30 to 80 DEG C, the reaction pressure is 2.0 to 3.0 MPa, and the fresh oil space velocity is 2.5 to 5.0 hour-1, under the condition that the hydrogen/oil volume ratio is 60-120:1, the raw material is contacted with the catalyst and reacts to convert the diolefin and alkenyl aromatic components in the raw material into monoolefin and alkylaromatic. Including alumina support, active component metal palladium or its oxide, at least one element selected from IA or IIA in the periodic table or its oxide, at least one element selected from IVA or VA in the periodic table or its oxide Oxide, the specific surface area of ​​the carrier is 40-160 m2/g, the total pore volume is 0.3-1.2 ml/g, and the carrier has a technical solution of composite pore distribution, which solves this problem well and can be used for full-run pyrolysis gasoline In the industrial production of selective hydrogenation.

The invention relates to a coating composite for a lithium ion battery separator, wherein the coating composite contains porous electro-insulated oxide particles, binding agent, foaming agent or foam stabilizing agent. The invention further relates to a foam gluing method for the lithium ion battery separator, comprising the steps: mechanically foaming and the coating suspension on the surface of a porous flexible substrate, drying, curing and roll compacting to form a film with micro pores, wherein the suspension contains the coating composite according to the invention. Adopting the coating composition according to the invention and the lithium ion battery separator prepared therefrom can achieve the purpose of small pore diameter, even pore distribution and ensuring the charging and discharging uniformity of lithium ion.

There is disclosed a porous honeycomb filter whose trapping efficiency does not drop even when a porosity fluctuates and which is capable of balancing the trapping efficiency and a pressure loss. The porous honeycomb filter is a filter whose pore distribution has been controlled. A volume of pores having a pore diameter of 15 μm or less is 0.07 cc/cc or less, and a volume of pores having a pore diameter of 40 μm or more is 0.07 cc/cc or less.

A diaphragm is selected from a composite membrane containing polyethylene terephthalate membrane as the base material. The composite membrane contains at least one organic polymer membrane consisting of polymer film-forming materials with a thermal resistant temperature of 170 DEG C to 500 DEG C and heat shrinkage of 0% to 5%. Preferably, a plasticizer is added during solution preparation to achieve more uniform pore distribution so as to obtain the composite membrane with excellent performance. The diaphragm has high temperature resistance and high safety when used for battery diaphragm. In addition, the diaphragm has good solution adsorption performance, so that the diaphragm can adsorb the electrolyte to improve the circle performance of the battery. The invention also provides the diaphragm preparation method, which is simple and convenient. Compared with the conventional battery and the battery using PET composite diaphragm with inorganic coating, the battery using the diaphragm has higher capacity, better high-rate discharge characteristics and low-temperature discharger performance, no flame and liquid leakage during high-temperature test, and excellent high-temperature safety performance.

Silica with a large pore volume, a large specific surface area, a narrow pore distribution, low contents of unwanted metal impurities, and excellent physical properties such as high heat-resistance and water-resistance is provided. The silica has a mode pore diameter (D_max) of 20 nm or less, and a solid-state Si nuclear magnetic resonance (hereinafter called solid-state Si NMR) spectrum of the silica includes a chemical shift (δ ppm) of Q⁴ peak meeting the following inequality (I).

−0.0705×(D_max)−110.36>δ  (I)

The silica with such properties can be suitably used in fields of which particularly excellent heat resistance and water resistance are required, and moreover controlled pore properties, and the fact that physical properties scarcely change over a long period of time are required among the above-mentioned applications.

An effective catalyst includes an amorphous silica-alumina support having a bimodal pore size-distribution. The support may be prepared by a method that includes the physical mixing of two silica-alumina gels prepared so as to have two different average pore sizes. The catalyst has the advantage that both metal dispersion on the support and product diffusion in the pores are optimized. Further, the catalyst has improved performance in the production of hydrocarbons from synthesis gas.

The invention discloses a method for preparing AL2O3 carrier. Said invention uses the farina as pore-expansion agent, which is added as powder after mixing other raw materials uniformly, and its added amount is 10-20wt% of alumina. Compared to present technique, said inventive alumina carrier has high strength, larger pore diameter, and centralized pore distribution, while said inventive method has simple process without special raw material and the cost of material and production are lower. The invention can be used as catalyst in the areas of oil refining, chemical industry and environmental protection, especially as the hydrogenation catalyst of heavy and residual oil.

A dual-pore distribution silica synthesis method includes that water, silicon source and template agent are mixed, and the pH value of the mixture is regulated to 4-12, the mixture is aged for 0.5-4 days at the temperature of 40-120 DEG C, and then the mixture is filtered, rinsed, dried and roasted; the template agent is the mixture of sugar and surfactant, the weight ratio of sugar and surfactant of the template agent is 0.5-2, the molar ratio of silicon and water is 1:30-1:200, the molar ratio of silicon and template agent is 1:0.005-2. The portable pore diameter of the pore with smaller pore diameter of the dual-pore distribution silicon-aluminum material is 2-10 nm, the portable pore diameter of the pore with larger pore diameter is 10-25nm, the specific area is 400-750 m2/g, and the pore volume is 0.8-1.5cm3/g. The dual-pore distribution silicon-aluminum material can be used as absorbent and catalyst, or used as the carriers of absorbent and catalyst.

The invention belongs to the fields of material science and engineering, and particularly relates to a preparation method of a gradient silicon carbide ceramic membrane for water purification. The method comprises the following steps: (1) preparing a silicon carbide ceramic support body; (2) preparing a silicon carbide intermediate layer; and (3) preparing a silicon carbide film, and finally preparing the gradient silicon carbide ceramic membrane for the water purification. The method has the beneficial effects that the prepared silicon carbide ceramic membrane material is high in communicating porosity, high in strength, high in pure water flux, and high in strong acid and alkali resistance; the pore distribution is in a gradient shape, different levels of connection surface are high in bonding strength, the method is simple and convenient to operate, and the gradient silicon carbide ceramic membrane is high in yield. According to the prepared gradient silicon carbide ceramic membrane material for water purification, the breaking strength is greater than 30MPa, the pure water flux is greater than 5m<3>/(m<2>h), and the range tolerance of the pH value is 0-14.

According to the present invention, an exhaust gas purifying catalyst is provided. The catalyst comprises a porous silica support comprising silica having a pore structure, and a perovskite-type composite metal oxide particle supported in the pore structure of the porous silica support. Further, the peak attributable to the space between silica primary particles is in the range of 3 to 100 nm in the pore distribution of the porous silica support.

The invention discloses a preparation method of a ternary positive material of a core-shell structure lithium ion battery. The preparation method comprises the following steps: (1) preparing a multi-element mixed solution of nickel salt, cobalt salt, manganese salt and aluminum salt; (2) under a protective atmosphere, adding the multi-element mixed solution, ammonia water and sodium hydroxide intoa reaction device containing a base solution, and carrying out a co-precipitation reaction to obtain an NCM hydroxide precursor; (3) introducing carbon dioxide gas so that an aluminum hydroxide coating layer is formed on the surface of the NCM precursor; and (4) filtering, washing and drying the precursor, and then adding a lithium source to carry out heat treatment so as to obtain an NCM material, wherein the surface of the NCM material is coated with aluminum oxide. The obtained precursor of a core-shell structure is uniform in pore distribution, moderate in interval and large in specific surface area. The positive material of the core-shell structure lithium ion battery is obtained through further treatment of the obtained precursor and the lithium salt, and the positive material has high charge-discharge specific capacity, long cyclic stability performance and good rate capability.

The invention relates to a lithium ion secondary battery porous silicon/carbon composite negative electrode material and a preparation method thereof. The composite material consists of porous silicon, a graphite-like carbon material and an amorphous carbon material. The preparation method comprises the following steps: by taking pyrolytic carbon as a reducing agent, preparing a silicon-aluminum alloy in one step by a mixture of alkali (earth) metal chloride-containing silicon dioxide powder and aluminum oxide powder; carrying acid corrosion and vacuum drying on the silicon-aluminum alloy; mixing the silicon-aluminum alloy and graphite in an organic polymer solution; drying the solvent by distillation; and finally roasting under inert atmosphere at high temperature to obtain the porous silicon/carbon composite material. Through adjusting the silicon-aluminum ratio and the particle size in the silicon-aluminum alloy preparation process, the pore size and the pore distribution in the final porous silicon/carbon material can be controlled. The porous silicon/carbon material provided by the invention has the characteristics of being high in first coulombic efficiency, long in cyclic life and high in capacity. Moreover, the used raw materials are low in cost and environment-friendly; the preparation method is simple in instruments, short in technological process and suitable for industrial production.

The invention discloses a shale gas reservoir pore structure quantitative calculation method based on nuclear magnetic resonance. The shale gas reservoir pore structure quantitative calculation methodcomprises the following steps: collecting cores; drilling parallel samples, carrying out oil and water self-adsorption nuclear magnetic resonance experiment measurement; contrastively analyzing the difference of a parallel sample oil and water nuclear magnetic resonance T2 spectrum, and determining the distribution of different wetting pore types on the nuclear magnetic resonance T2 spectrum; obtaining a shale gas reservoir full-pore distribution curve according to high-pressure pressurized mercury, nitrogen adsorption and carbon dioxide adsorption; furthermore, obtaining an intersection plate of pore diameters and corresponding T2 time; and according to the intersection plate of different pore types of pore diameters and corresponding T2 time, establishing a quantitative calculation model of the pore diameters according to the pore types. The method has the advantages that a shale gas reservoir pore full-pore distribution curve can be quantitatively calculated through the technology;simultaneously, the nuclear magnetism measurement is quick, simple and loss-free, and is higher in practicability by compared with high-pressure pressurized mercury, nitrogen adsorption and carbon dioxide adsorption; and compared with a conventional method, the calculation result is more accurate.

The invention discloses a three-dimensional rock core visualization method based on CT images. The method includes the steps of image obtaining, grey scale transformation, brightness processing, contrast ratio stretching, binarization and three-dimensional visualization. Through the method, three-dimensional rock core visualization based on the CT images is achieved, geological information of a rock core such as pore morphology and distribution, rock types and microstructures can be visually observed. Compared with the traditional method that slices of a casting body are obtained and cross-section analysis is directly conducted on a three-dimensional rock core entity, the three-dimensional rock core visualization method based on the CT images has the advantages that cracks and pore distribution status of the rock core can be observed on the condition of not changing the morphology and internal structure of the rock core, so that a large amount of modeling time and economical cost are saved, the working efficiency is improved, and researchers can conduct various rock core simulation experiments and analysis on the rock core more visually and conveniently.

The present invention belongs to the preparation field of micropore carbon material, and relates to the preparation method for micropore carbon material with high specific surface area and narrow pore distribution by biomass. The biomass is cleaned and cut into subparagraph with a length of 1~3 centimeter, and then is subjected to carbonizing at 300~500 DEG C for 3~4 hours in the presence of inert atmosphere. The obtained carbonizing product is immerged into an alkaline solution for 20~24 hours until the carbonizing product is totally wetting, and then the carbonizing product is separated from the solution and is activated for 1.5~3 hours at 700~800 DEG C in the presence of inert atmosphere, and then is scrubbed by water until the pH value of the scrub solution is 7~8, and then the carbonizing product is immerged into a diluted acid solution for 4~5 hours and is scrubbed by water until the pH value of the scrub solution is 6~7, finally, the carbonizing product is dried at 80~120 DEG C to obtain micropore carbon material. The preparation method for the present invention has the advantages of that the preparation process is simple, the raw material is cheap and abundant, the preparation condition is free from zone limit; besides, the preparation method is adapted to industrial production.

The invention provides a method for producing bubbles that exhibit an excellent monodispersity. The invention relates to a method for generating bubbles by the injection and dispersion of a gas through a porous body into a liquid, wherein the value produced by dividing the pore diameter that accounts for 10% of the total pore volume in the relative cumulative pore distribution curve of the porous body by the pore diameter that accounts for 90% of the total pore volume in the relative cumulative pore dismeter distribution curve of the porous body is 1 to 1.5.

The present invention discloses a morphological filtering-based electrical imaging reservoir fracture and cave body quantitative characterization method and system. The method includes the following steps that: 1) noise suppression and blank band encryption interpolation are performed on original electric imaging logging data to obtain full-coverage rate electrical imaging logging data; 2) structural elements of appropriate shapes and scales are selected, and morphological filtering is performed on the obtained electrical imaging logging data in the step 1), so that fracture and cave pore distribution of different scales can be determined; and 3) the proportion of the porosity of fractures and the proportion of the porosity of corroded caves are calculated according to the fracture and cave pore distribution of different scales, so that a fracture and cave porosity spectrum which can indicate pore throat size and porosity distribution relationships can be obtained. According to the method of the invention, a mathematical morphological filtering method is introduced into imaging logging data processing; based on the filtering and anomaly recognition technologies of conductivity signals of different scales, the signal-to-noise ratio and identifiability of fracture and cave abnormal signals are improved; and exact information such as intuitive fracture and cave shapes and scale distribution can be provided for the processing and interpretation of electrical imaging logging data.

The invention relates to an alumina carrier with a composite pore structure and a preparation method thereof. The method mainly solves the technical problem that it is difficult to obtain macroporous alumina carriers with different pore distributions above 20 nanometers and the preparation method thereof in the prior art. In the present invention, the specific surface area of ​​the alumina carrier is 40-160 m2/g, the total pore volume is 0.3-1.2 ml/g, and the pore volume with a pore diameter of less than 30 nanometers accounts for 5-60% of the total pore volume. The pore volume of 30 to 60 nanometers accounts for 20 to 75% of the total pore volume, and the pore volume with a pore diameter > 60 nanometers accounts for 20 to 60% of the total pore volume as a composite carrier; the preparation method of the composite carrier adopts firstly alumina A Mixing with alumina B, molding, drying at 50-100°C for 1-24 hours, and then roasting at 800-1150°C for 1-10 hours to obtain a technical solution to the composite carrier solves this problem well, and can be used for pyrolysis gasoline In the industrial production of hydrogen catalysts.

A porous honeycomb structure includes: a plurality of partition walls containing cordierite as a main component and constituted of a porous ceramic having a porosity of 55 to 75% and an average pore diameter of 15 to 35 μm, wherein the partition walls have a pore distribution represented by the following condition formula (1):

Lr>0.3×P/100+0.91  (1),

• • “in the above condition formula (1), Lr means an average developed length ratio, and P means a porosity obtained from a total pore volume measured by a mercury press-in type porosimeter, assuming that a true specific gravity of cordierite is 2.52 g/cc.”The porous honeycomb structure is capable of effectively achieving raising of a trapping efficiency of soot or the like, lowering of a pressure loss, improving a purifying performance by effective use of a catalyst, and lengthening a trapping time, and is additionally capable of improving a dissolved loss limit at the time of filter regeneration, and an isostatic strength.

The invention discloses a mesoporous acid silicon-aluminum catalytic material which is of a pseudo boehmite crystalline phase structure. Based on the oxide weight, the anhydrous chemical expression of the material is (0-0.2)Na2O.(16-20)SiO2.(80-84)Al2O3, the specific surface area is 300-600m<2>/g, the pore volume is 1.0-2.0ml/g, the average pore size is 8-20nm, and the ratio of pyridine infrared B acid to L acid measured at 200 DEG C is 0.060-0.085. The material disclosed by the invention has obvious mesoporous characteristics and centralized pore distribution, and contains the centers of B acid and L acid at the same time; and moreover, the ratio of the B acid to the L acid is obviously increased, and the material obtains better light oil micro-activity.

The invention relates to an efficient ecotype inorganic formaldehyde adsorbing material which is obtained by mixing and curing 50%-75% of a solid raw material containing aluminosilicate, 10-40% of alkaline solution and 10%-15% of a complex reaction activator, wherein the solid raw material containing the aluminosilicate comprises at least one of the following raw materials: clay, kaolin, coal gangue, fly ash, waste incineration ash, slag, red mud and the like; alkali content of the alkaline solution is 3-12mol/L[OH-]; and the complex reaction activator comprises two components at mass ratio of 75-85% of a silicate substance and 15-25% of Al2O3 particle size of which is more than 1000 meshes. The inorganic adsorbing material is of a net porous gel structure, total pore volume is 0.17mL/g-0.36mL/g, specific surface area is 300-650m<2>/g, and pore distribution mainly adopt two modes of micropores (pore diameter is less than 2nm) and mesopores (pore diameter is 2-50nm), wherein the pore volume of the micropores (45%-60%) and the mesopores (25%-50%) accounts for 85%-95% of the total pore volume. The inorganic adsorbing material comprises 80-95% of an amorphous component and 5-20% of a crystal component based on the total mass of the material.

The present invention relates to a heavy oil hydrogenation protection catalyst, preparation and applications thereof. According to the catalyst, Al2O3 or SiO2-containing Al2O3 is adopted as a carrier; a carrier pore volume is 0.98-1.15 ml/g; a specific surface area is 340-380 m<2>/g; pore distribution is as the follow: the amount of the pore volume of pores with a pore diameter of less than 5 nm is 10-15% of the amount of the total pore volume, the amount of the pore volume of pores with a pore diameter of 5-15 nm is 50-55% of the amount of the total pore volume, and the amount of the pore volume of pores with a pore diameter of more than 15 nm is 25-40% of the amount of the total pore volume; the catalyst is loaded with nickel-molybdenum-sulfur, nickel-tungsten-sulfur, molybdenum sulfide, tungsten sulfide, cobalt-molybdenum-sulfur, cobalt-tungsten-sulfur, nickel-cobalt-molybdenum-sulfur, nickel-cobalt-tungsten-sulfur or cobalt-molybdenum-nickel-tungsten, and the loaded material is combined with Ni2P to form the composite catalyst. The catalyst has characteristics of suitable pore size, high metal melting ability, small active ingredient scale, good dispersity and high catalyst activity, and is suitable for heavy oil and heavy oil protection catalysts.

A method of preparing pseudoboehmite is disclosed. The method includes preparing aluminium hydroxide precipitate, ageing, washing and drying. The preparation of the aluminium hydroxide precipitate adopts a reactor, wherein the reactor comprises a reactor cylinder and is provided with a stirrer inside, the bottom of the reactor cylinder is provided with two feeding ports, two material circulating pipelines are disposed outside the reactor cylinder, each of the material circulating pipelines is provided with at least one outlet, circulating material outlets are in the upper part of the reactor cylinder, inlets of the two material circulating pipelines are respectively connected to the two feeding ports through pipelines, and the upper part of the reactor cylinder is provided with an overflow port that is higher than the circulating material outlets. Pseudoboehmite particles prepared by the method are uniform in particle size, so that prepared aluminum oxide is large in pore volume, large in pore diameter and centralized in pore distribution, and the prepared aluminum oxide is uniform and constant in properties.

The invention discloses a method for preparing a nano porous titanium dioxide thin film doped with Pd by a constant voltage dealloying method on a Ti-Cu-Pd amorphous alloy stripe, in order to provide a novel Pd-TiO2 composite electrode catalyst. A nano porous thin film structure with uniform pore distribution is prepared by steps of adopting a traditional electrochemical three-electrode system, using nitric acid solution as an electrolyte solution, and respectively applying a constant voltage to the amorphous alloy stripe to realize constant voltage electrochemical corrosion by Gamry Reference 600 electrochemical workstation. The method is low in implementation cost, simple and convenient to operate, strong in controllability, good in repeatability and low in reaction temperature, so that the method is an efficient and economic synthesis method.