221 results about "Electrosynthesis" patented technology

The invention belongs to the technical field of chemical catalysis, and particularly relates to a preparation method of an alkali metal cation modified cobalt-nitrogen-carbon monatomic catalyst and application of the catalyst in electrosynthesis of hydrogen peroxide. The Co-N-C / X catalyst is obtained by taking a cobalt-containing compound as a metal source, mixing the metal source with a nitrogen-containing organic matter and a carbon material, performing rotary evaporation, grinding and high-temperature pyrolysis in an inert atmosphere, performing acid washing with strong acid to construct surface defects, and finally performing stirring adsorption with an alkali metal salt solution, suction filtration and drying. Alkali metal cations are physically adsorbed and anchored on the surface and interface of the Co-N-C catalyst instead of being dissolved in a solution, so that the electronic structure of Co active sites and the adsorption energy of the * OOH intermediate are optimized, and the problem of separation of alkali metal and a product is solved. When the catalyst is used for electro-catalytic oxygen reduction reaction, the H2O2 selectivity reaches up to 98%, the preparation process is simple, the cost is low, large-scale production can be realized, and the problems that the traditional method is high in energy consumption and large in pollution and the existing catalyst is insufficient in selectivity are solved.

The invention discloses an electro-synthesis method of alpha-aminomethyl tetrazole, which comprises the following steps: by taking a platinum sheet as a cathode, a carbon rod as an anode and tetrabutylammonium tetrafluoroborate as an electrolyte under the catalysis of constant current, coupling tertiary amine, isonitrile and azido trimethylsilane by a one-pot method to prepare an alpha-aminomethyl tetrazole derivative, and carrying out post-treatment on the obtained reaction mixed solution, and carrying out column chromatography separation to obtain a pure alpha-aminomethyl tetrazole product. The alpha-aminomethyl tetrazole can be obtained only through one-step reaction, the operation steps are few, a large number of oxidizing agents and additives are not used, the post-treatment process is simple, and the product is easy to separate.

The invention relates to the technical field of electrochemistry, in particular to a foam titanium-based iodine iron double-monatomic electrode, preparation thereof and application of the foam titanium-based iodine iron double-monatomic electrode in preparation of singlet oxygen. The configuration of the foamed titanium-based iodine-iron double-monatomic electrode provided by the invention has a double-monatomic synergistic effect, iodine monatomic can be utilized to dissociate water molecules to release atomic hydrogen, and the atomic hydrogen is used for reducing and activating oxygen adsorbed by iron sites, so that active sites are fully utilized, the atom utilization efficiency and reaction activity are improved, and competitive side reactions are reduced; according to the foamed titanium-based iodine iron double-monatomic electrode material, the singlet oxygen electrosynthesis rate is remarkably increased, the use scene of singlet oxygen in-situ utilization is expanded, and the foamed titanium-based iodine iron double-monatomic electrode material has excellent performance in the fields of degradation of aromatic organic pollutants in water, removal of antibiotic resistance genes, purification of pollutants such as pathogenic viruses in air and the like.

The invention relates to the technical field of degradation-resistant organic wastewater treatment, in particular to a cathode and anode type electro-Fenton coupling wastewater treatment device and method.The cathode and anode type electro-Fenton coupling wastewater treatment method comprises the steps that a titanium electrode or a BDD electrode is adopted in an anode module, 0.05-0.5 mol / L sulfate radical serves as electrolyte, and persulfate is electrically synthesized in situ; a cathode module is a porous carbon electrode, and # imgabs0 # is generated through aeration at the speed of 0.5 L / min to 2 L / min; the space between the cathode modules is filled with three-dimensional invasive plant source biochar catalytic particle electrodes, the H-type double-chamber electrolytic tank separates a cathode chamber and an anode chamber through a proton membrane, and the method comprises an intermittent type (firstly adsorbing trace pollutants and then oxidizing, and biochar is renewable) and a continuous type (synchronously adsorbing and degrading high-concentration wastewater, and pretreating to improve biodegradability). The device realizes the cooperation of adsorption and electrocatalytic oxidation, efficiently treats refractory wastewater, promotes the recycling of invasive plants, and has both environmental protection and economic values.

The invention discloses a method for synthesizing an organic nitrile compound by using Pickering emulsion to electrocatalyze aldoxime dehydration, which comprises the following steps: ultrasonically dispersing carbon nanotubes in water, dissolving aldoxime organic matters in cyclohexane, mixing an aqueous solution with a cyclohexane solution, and forming the Pickering emulsion under the action of a homogenizer with the rotating speed of more than 1500rpm; then injecting a certain amount of nitrogen dioxide gas, continuously electrolyzing for 12 hours within the voltage range of-0.3 VRHE to-1.2 VRHE, and homogenizing for 5 seconds by the homogenizer every 5 minutes; the invention relates to the technical field of organic electro-synthesis, in particular to a method for synthesizing an organic nitrile compound by using Pickering emulsion to electrocatalyze aldoxime dehydration, which is a method for directly preparing organic nitrile from reactants aldoxime and nitrogen dioxide in a reactor under electric drive. According to the method, the traditional synthetic technical route of organic nitrile is avoided, the nitrile compound is synthesized in one step, and the method is a novel synthetic method which is brand-new, green, safe and low in harm to a human body and the environment.

The invention provides an iron metal oxyhydroxide catalyst, a preparation method thereof and application of the iron metal oxyhydroxide catalyst in urea electrosynthesis, and belongs to the technical field of electrocatalysis, the iron metal oxyhydroxide catalyst comprises a stainless steel mesh substrate and a FeOOH layer coating the surface of the stainless steel mesh substrate; wherein the stainless steel mesh substrate is subjected to diluted hydrochloric acid soaking ultrasonic pretreatment. The iron metal oxyhydroxide catalyst with a polarized Fe0-Fe3 + structure is prepared by taking a stainless steel mesh pretreated by diluted hydrochloric acid as a substrate through an electrochemical deposition process. The catalyst has high C-N coupling selectivity and good cycling stability in a urea electro-catalysis synthesis reaction.

The invention discloses a preparation method of a hydroxy ketone compound based on electrosynthesis and the hydroxy ketone compound prepared by the preparation method, and belongs to the technical field of preparation of hydroxy ketone compounds. The preparation method of the hydroxyl ketone compound based on electrosynthesis comprises the following steps: in a protective atmosphere, in an organic solvent, taking an epoxy compound as shown in a formula 1, an aryl iodide as shown in a formula 2 and a carbon monoxide source as reaction raw materials, and under an electrochemical condition and the action of an accelerant and a metal catalyst, carrying out electrosynthesis on the reaction raw materials to obtain the hydroxyl ketone compound based on electrosynthesis. Carrying out electroreduction carbonylation reaction to obtain a hydroxy ketone compound as shown in a formula 3; the reaction process is shown as a reaction formula (1). According to the method, metal powder is prevented from being used as a reducing agent, the operation method is simple and convenient, and the safety is good. # imgabs0 #

The invention belongs to the technical field of electro-catalytic materials, and particularly discloses an N / O co-doped carbon bowl electrode material and a preparation method and application thereof. The preparation method comprises the following steps: mixing ammonia water, silicon alkoxide, alcohol and water to obtain a mixed solution; mixing the mixed solution, resorcinol and a formaldehyde solution, centrifuging to obtain a precipitation sample, and annealing the precipitation sample to obtain solid carbon nanospheres; the solid carbon nanospheres and an alkaline solution are subjected to an etching reaction, and an N / O co-doped carbon bowl electrode material is obtained; the time of the etching reaction is 90 to 100 hours. The prepared N / O co-doped carbon bowl electrode material is a metal-free carbon catalyst, and a prepared N / O co-doped carbon bowl electrode has high ORR activity, excellent 2e-selectivity and long-term stability, and has important significance for promoting acidic electrosynthesis of H2O2.

The invention provides a preparation method of a metal-doped cobalt-based dynamic catalyst and application of the metal-doped cobalt-based dynamic catalyst in electrosynthesis of ammonia, and belongs to the technical field of catalysts. The metal-doped cobalt-based catalyst is prepared by adopting an ion exchange and reducing atmosphere calcination method, has a self-supporting characteristic and high activity, and is directly used as an electrode in the process of electrosynthesis of ammonia, so that the reaction stability is greatly improved. Compared with the existing electrosynthesis ammonia catalyst, the metal-doped cobalt-based dynamic catalyst prepared by the invention has unique advantages in the aspects of interface water activation and nitrogen oxide conversion, and shows excellent application prospects.

The present invention belongs to the field of organic electrosynthesis and relates to a method for electrochemically synthesizing a pyridine-fused polycyclic nitrogen heteroaromatic compound. A 2-[2-phenylethynylamine]-1,4-naphthoquinone analogue, a quaternary ammonium salt and a Lewis acid are dissolved in an organic solvent to obtain a mixed solution; an electrode is inserted into the mixed solution, a constant current is connected in an inert gas atmosphere system, and an electric reaction is carried out with stirring to obtain a pyridine-fused polycyclic nitrogen heteroaromatic compound. The present invention adopts an electrochemical synthesis method, which significantly improves the reaction efficiency. The synthesis method of the present invention does not require an oxidant or a metal catalyst, is simple to operate, and is green and efficient. The pyridine-fused polycyclic nitrogen heteroaromatic compound prepared by the present invention has the characteristics of high biological activity and is widely applicable to the fields of medicine and functional materials. The pyridine-fused polycyclic nitrogen heteroaromatic compound prepared by the present invention can be used as a standard.

A method for recovering NH4+ or K+ ions from manure wastewater is disclosed. The method includes contacting manure wastewater having organic matter and salts with an ion-selective redox material with ionic channels. The manure wastewater reduces the ion-selective redox material which spontaneously takes up NH4+ or K+ ions from the manure wastewater. NH4+-or K+ may be released electrochemically and paired with the simultaneous electrosynthesis of value-added chemicals.

The invention relates to a preparation method of a novel series heterojunction electrocatalyst for urea synthesis, and belongs to the technical field of production of high value-added chemicals and catalysts. The novel bimetallic oxide series electrocatalyst (CuO / Co3O4) is prepared by taking ZIF-67 as a precursor and combining an ion exchange method with a low-temperature pyrolysis method, and green and energy-saving urea electrosynthesis can be realized through co-reduction of electrocatalytic CO2 and NO3 <->. The CuO / Co3O4 series electrocatalyst is prepared into a cathode, and under the action of specific additional bias voltage, the yield of urea electrocatalytically synthesized by the catalyst within 30 min reaches 14 mmol gcat <-1 > h <-1 >, and the highest Faraday efficiency reaches 61.1%; the stable urea yield, Faraday efficiency and current response can still be kept after six times of cyclic utilization, and a green synthesis route and a sustainable technology are provided for urea electrosynthesis. The method has the characteristics of simplicity, high efficiency and low cost, and can be applied to electro-catalytic synthesis of urea.

The invention belongs to the technical field of electro-catalytic synthesis, and provides a hydrophobic electrode with an asymmetric structure, a preparation method of the hydrophobic electrode, and a system and a method for electro-synthesizing H2O2. The hydrophobic electrode with the asymmetric structure comprises a hydrophobic modified porous conductive supporting layer and a catalyst permeating one side of the hydrophobic modified porous conductive supporting layer, the catalyst comprises one or more of carbon black, graphene, carbon nanotubes and zinc oxide; the permeation thickness of the catalyst is smaller than the thickness of the hydrophobic modified porous conductive support layer; one side permeated with the catalyst is a catalyst layer; and one side which is not permeated with the catalyst is a gas storage layer. The hydrophobic electrode with the asymmetric structure can realize efficient and uniform supply of gas (oxygen), can maintain an electrode with stable interface hydrophobicity for a long time and a corresponding system, and has important significance for promoting the practicability of a 2e-ORR electrosynthesis H2O2 technology.

The invention relates to the technical field of electrosynthesis of high-added-value products, in particular to a supported catalyst for producing hydrogen peroxide through electrocatalytic oxygen reduction and a preparation method and application of the supported catalyst. The catalyst is represented by a formula NiTPP (at) CNT-ox, an oxygen-doped carbon nanotube CNT-ox is used as a carrier, and nickel tetraphenylporphyrin NiTPP is used as an active site. According to the preparation method, NiTPP is adsorbed on CNT-ox through a dispersion-adsorption method, and the supported catalyst NiTPP coated CNT-ox is obtained. The NiTPP-CNT-ox prepared by the method has relatively high catalytic activity, selectivity and excellent stability in the process of preparing hydrogen peroxide by electrocatalytic oxygen reduction, and has a potential application prospect.

The invention provides a synthesis method of a hydrogen-bond organic framework film material, namely an electric synthesis method capable of continuously preparing the hydrogen-bond organic framework film material, which comprises the following steps: (1) adding an organic ligand into a poor solvent or a mixed solvent formed by the poor solvent and a good solvent, and then adding alkali to clarify the solution; and (2) applying direct current to the prepared solution by taking a conductive substrate as a cathode and an anode, and collecting a product deposited on the conductive substrate after electrifying for a period of time, so as to obtain the hydrogen bond organic framework film material corresponding to the ligand. The method is simple and rapid, the compact HOF thin film can be rapidly deposited on the conductive substrate, and high-efficiency and continuous synthesis can be achieved. The synthesized HOF film material can be used in the field of electrochromism.

The application discloses a preparation method of an indoline compound based on organic electrosynthesis, and belongs to the technical field of pharmaceutical chemical engineering and related chemistry. The method uses simple arylamine and halogenated olefin as raw materials, and prepares the indoline compound under the electrolysis of an electrode, so that green and efficient synthesis of the indoline compound is realized. The method has the advantages of low cost, high selectivity, mild reaction condition, good functional group compatibility, wide substrate range and environmental friendliness. The indoline compound is an important organic synthesis intermediate, and has a very wide application in the fields of fine chemical engineering and pharmacy. The preparation method has great application value and social and economic benefits.

Provided is a cathode electrode catalyst for ammonia electrosynthesis that contains a perovskite-type metal oxynitride. The perovskite-type metal oxynitride includes, as main metal elements: A, which is at least one element selected from the group consisting of Ba, Sr, and Ca and which contains 50 mol% or more of Ba; and Mo or B, which is at least one element selected from the group consisting of Ta, Nb, and W. The perovskite-type metal oxynitride satisfies a prescribed formula.

An electro-energy or electro-synthetic cell, including a cathode, an anode and an electrode separator positioned between the cathode and the anode. A liquid electrolyte inlet supplies a liquid electrolyte to the cell, and a liquid electrolyte outlet removes the liquid electrolyte from the cell. The liquid electrolyte outlet includes an overflow weir over or through which excess liquid electrolyte flows out of the cell. In another form, one or more drippers are included as part of the liquid electrolyte inlet and / or the liquid electrolyte outlet and drip chambers are positioned below the drippers. In another form, one or more porous capillary structures are located in liquid pathways in the cell, for example in a liquid pathway provided by an overflow weir or adjacent a dripper. In another form, one or more restrictors are utilised that create a pressure drop in the liquid electrolyte passing through the restrictor.

The present invention relates to a method for preparing a structurally discontinuous air self-priming electrode with surface microcracks that resist electrowetting. A carbon black-polytetrafluoroethylene film prepared by coating forms a large number of irregular microcracks during the calcination process, thereby causing structural discontinuity. This structurally discontinuous air self-priming electrode can effectively avoid the electrowetting effect and the resulting electrolyte flooding during electrocatalytic service, maintain stable local water resistance and air self-diffusion channels, and achieve efficient and long-lasting electrochemical synthesis of H2O2. Due to the steric effect, the discontinuity of the electrode structure prevents electric field lines from reaching, resulting in a local low electric field region at the crack. This achieves the electrode's anti-electrowetting ability during long-cycle electrolysis, achieves stable hydrophobicity and rapid oxygen transmission channels under the electric field, and greatly improves the yield, current efficiency, and long-term stability of H2O2 electrosynthesis in air.

1. The name of the product of this design: Electrochemical continuous flow reactor host. 2. Purpose of the product of this design: used for producing chemicals through organic electrosynthesis reactions. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention discloses a hydrogen-embedded tungsten bronze type tungsten-based catalyst as well as a preparation method and application thereof, and belongs to the technical field of electro-catalysis. According to the preparation method, sodium tungstate dihydrate, anhydrous sodium sulfate, citric acid and glucose are taken as raw materials, WO3 with different crystal phases is prepared by adopting a hydrothermal method and an annealing and calcining method respectively, the WO3 is prepared into catalyst slurry, and the catalyst slurry is uniformly coated on a gas diffusion layer carbon paper substrate, so that the hydrogen-embedded tungsten bronze type tungsten-based catalyst is prepared; according to the invention, different crystal phases of WO3 are prepared into electrodes as reduction ends, so that WO3 can form tungsten bronze through embedding H < + > in the reaction process, and finally the hydrogen-embedded tungsten bronze type tungsten-based catalyst is formed, and high current density and high Faraday efficiency of the catalyst can realize efficient one-step electro-catalysis of coupling of nitrate and cyclohexanone to synthesize cyclohexanone-oxime. The practical application requirements of the electric synthesis of the cyclohexanone oxime are met.

The invention provides a self-breathing anti-scaling cathode, a preparation method, an electrolytic bath and application of the electrolytic bath, and belongs to the technical field of electrochemical electrodes. The preparation method comprises the following steps: mixing a carbon substrate and a catalyst precursor solution, and carrying out first calcination on the mixed solution under a protective atmosphere to obtain an anti-scaling cathode; and the anti-scaling cathode is sprayed with a water repellent agent and then subjected to second calcination in an oxygen-containing atmosphere, and the self-breathing type anti-scaling cathode is obtained. On one hand, the oxygen mass transfer efficiency is improved through the self-breathing anti-scaling cathode, deposition of divalent ions such as Ca < 2 + > and Mg < 2 + > is inhibited, the generation capacity of hydrogen peroxide is remarkably enhanced, and the long-term operation stability is improved; on the other hand, a spatial hydrophobic microenvironment is provided, and the yield of H2O2 is increased under the condition that external air ventilation is not needed; meanwhile, due to the design of the hydrophobic anode, decomposition of H2O2 at the anode is reduced, and efficient and stable electrosynthesis of H2O2 for pollutant degradation is realized.

The invention discloses a noble metal modified hollow structure catalyst as well as a preparation method and application thereof, and belongs to the technical field of electro-catalysis. The preparation method comprises the following steps: (1) preparing a precursor to obtain cuprous oxide; (2) constructing a hollow structure: enabling transition metal oxide to grow on the surface of cuprous oxide; adding a Na2S2O3 solution to etch cuprous oxide to obtain a hollow transition metal oxide; (3) precious metal modification: obtaining a transition metal oxide precursor modified by precious metal salt; and (4) thermal treatment growth: carrying out high-temperature annealing on the transition metal oxide precursor modified by the noble metal salt to obtain the noble metal modified hollow structure catalyst. According to the catalyst, through in-situ growth of precious metal oxide particles or precious metal state particles on the surface of the transition metal oxide, intermediate adsorption can be optimized, side reactions are inhibited, and the efficiency and selectivity of reducing nitrate into ammonia are improved.

The invention discloses a low-energy-consumption electrosynthesis method of phosphotriester compounds, and belongs to the technical field of electrolysis processes for producing compounds. In the electrolysis process, the catalyst loses electrons on the surface of the anode, an oxidation-state catalyst with oxidability is formed, and then the oxidation-state catalyst flows into the reaction device along with oxidation-state catalytic liquid. The oxidation-state catalyst reacts with white phosphorus to oxidize the white phosphorus and reduce the white phosphorus into a normal-state catalyst, and the oxidation-state white phosphorus has good reactivity and can further react with a monohydric hydroxyl compound to form a target phosphotriester compound. According to the method, the catalytic liquid is used as a medium participating in circular reaction, the synthesis route overcomes production interruption caused by reaction and product separation of white phosphorus and the unitary hydroxyl compound in an electrolytic tank under the action of current in an existing electrolytic synthesis system, and the method has the advantages of being simple, efficient, green, environmentally friendly and capable of achieving full-continuous flow production; the method is suitable for industrial production and has a good application prospect.

An electrosynthetic cell and its use are disclosed. The electrosynthetic cell can be used in a reductive electrosynthesis of one or more desired chemical products from one or more chemical reactants. The electrosynthetic cell comprises a hydrogen anode half-cell and a cathode half-cell. The hydrogen anode half-cell comprises hydrogen (H2), a first liquid phase solution that is in contact with an anode and a heterogeneous redox catalyst capable of catalyzing the oxidation of H2 to H+, and a redox mediator capable of transferring or accepting electrons and / or protons while undergoing reduction or oxidation. The cathode half-cell comprises a second liquid phase solution comprising the one or more chemical reactants that is in contact with a cathode and a reductive synthesis catalyst capable of catalyzing the reductive synthesis of the one or more desired chemical products from the one or more chemical reactants.

1. The name of the product of this design: electrochemical continuous flow reactor module. 2. Purpose of the product of this design: used for producing chemicals through organic electrosynthesis reactions. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention discloses a bioelectricity-Fenton system based on a modified carbon nanotube cathode catalyst and a method for degrading organic pollutants by using the bioelectricity-Fenton system, and belongs to the field of environmental engineering and wastewater treatment. The prepared modified carbon nanotube cathode catalyst has more excellent two-electron oxygen reduction activity and selectivity, and H2O2 can be efficiently produced under bioelectricity driving. A modified carbon nanotube cathode catalyst is coated on an air diffusion electrode with the loading capacity of 0.009-0.279 mg cm <-2 > to serve as a cathode, a carbon brush with electroactive microorganisms stably attached to the surface serves as an anode, a cathode chamber and an anode chamber are separated through a proton exchange membrane, the cathode chamber and the anode chamber are connected through an external wire, a 200-1000 ohm resistor is externally connected, and the air diffusion electrode is formed. The anolyte is a nutrient solution suitable for microbial growth, and the catholyte is organic wastewater to be treated. During wastewater treatment, the cathode and the anode are short-circuited by using a lead, and the pH of the cathode wastewater is adjusted to be 1-3. The system does not need aeration, H2O2 is electrically synthesized in a self-driven mode, the accumulation amount reaches 103.14 mg L <-1 > after 2 h, the H2O2 and additional Fe < 2 + > form a biological electro-Fenton system, and complete degradation of 10 mg L <-1 > sulfamethazine can be achieved within 20 min. According to the invention, the problems of low H2O2 yield and low pollutant treatment efficiency of a bioelectro-Fenton system are solved.

The invention discloses a method for electrically synthesizing 5-aminolevulinic acid by using pichia pastoris. According to the method, based on construction of pichia pastoris for reducing a glycine pathway and a 5-ALA synthesis pathway, a microbial electrochemical system is used for providing external electric energy to realize electric synthesis of 5-ALA. According to the method, pichia pastoris is selected as a research object, an efficient carbon sequestration glycine reduction pathway and a 5-ALA generation pathway are constructed in the earlier stage, the recombinant pichia pastoris is applied to a microbial electrochemical system, formic acid or CO2 is used as a carbon source, electric energy supplied by the microbial electrochemical system is used as an energy source, and the microbial electrochemical system is constructed. And the generation condition of the pichia pastoris 5-ALA under the electric energy condition is researched.

The present invention is directed to a paired electrosynthesis process for the (co)production of hydroxylamine (HA) and / or ammonia out of N2 or air and water. It further provides an electrolyzer developed for said purpose comprising both a porous cathode and anode with an effective catalyst layer and based on a continuous flow process. The process and electrolyzer of the present invention are particularly useful to efficiently convert reactants such as NOs′, NO2; NOx and N2 at both, the cathode and anode.

The invention is suitable for the technical field of electrochemical catalysts, and provides a preparation method and application of an MOF-derived NiCr2O4 (at) C catalyst, and the method comprises the following steps: mixing nickel salt, chromium salt and terephthalic acid in a solvent to form a mixed solution; wherein the molar ratio of the nickel salt to the chromium salt is (1-2): 1; carrying out solvothermal reaction on the obtained mixed solution at 120-160 DEG C for 6-18 hours, and washing and drying a reaction product to obtain a NiCr-MOF precursor; and carrying out heat treatment on the NiCr-MOF precursor in an inert atmosphere at 450-650 DEG C for 1-3 hours to obtain the NiCr2O4-C catalyst. The obtained catalyst has an MOF-derived porous carbon composite structure, shows about 100% H2O2 selectivity, high catalytic activity and excellent stability in alkaline electrolyte, is simple in preparation method and good in repeatability, and provides a high-performance and low-cost solution for green electrosynthesis of hydrogen peroxide.