22 results about "Alcohol oxidation" patented technology

The invention discloses a difunctional alcohol dehydrogenase derived from Geobacillus thermodenitrifis, the difunctional alcohol dehydrogenase takes NAD < + > as a cofactor, can specifically catalyze a continuous oxidation reaction of omega-hydroxy fatty acid, and catalyzes the omega-hydroxy fatty acid to synthesize alpha, omega-binary fatty acid through single enzyme catalysis without an aldehyde intermediate. The alcohol dehydrogenase has dual catalytic functions of alcohol oxidation and aldehyde oxidation, the oxidation process from hydroxymethylene to carboxyl can be completed in one step, the reaction steps are simplified, accumulation and separation of intermediate aldehyde are avoided, the conversion efficiency is improved, and the alcohol dehydrogenase is alpha, omega-dibasic fatty acid and is a novel alcohol dehydrogenase. The invention provides a simple and efficient biocatalysis way for biosynthesis of dodecanedioic acid, especially dodecanedioic acid, and has important industrial application value.

The invention relates to the field of electrocatalytic materials, in particular to an anion modified NiCo hydroxide electrocatalytic material and application thereof. The NiCo hydroxide modified by phosphate radicals and other anions is synthesized through a two-step hydrothermal method, and the performance of the NiCo hydroxide for preparing amide through electro-catalysis ethanolamine oxidative coupling is studied. Taking the NiCo hydroxide modified by phosphate as an example, under the optimal condition, the productivity and Faraday efficiency of acetamide achieved by the NiCoPO catalyst reach the maximum value and are superior to those reported at present. It is found that the catalytic activity and stability of the catalyst can be remarkably improved through introduction of anions, and the yield and Faraday efficiency of acetamide in five cycles are kept relatively stable. Meanwhile, NiCoPO can efficiently catalyze oxidative coupling of other long-chain alcohols and aromatic ring alcohols with ammonia. The invention provides a new thought and method for developing an efficient and stable electrocatalyst, and also provides powerful support for industrial application of alcohol oxidative coupling preparation of organic compounds such as amide and the like.

This invention discloses a cobalt zeolite catalyst, its preparation method, and its application in the oxidation reactions of benzylamine, alcohols, and anisole sulfides, specifically relating to alcohol oxidation, amine oxidative coupling, and sulfide oxidation reactions. This invention further expands the application scope of cobalt zeolite catalysts, clarifying their suitability for the oxidation reactions of alcohols, amines, and sulfides. The catalyst is prepared via in-situ hydrothermal synthesis, and its catalytic performance can be optimized by precisely controlling pore size, cobalt species dispersion, and their existing forms. Under oxygen or air atmospheres, this catalyst can efficiently achieve highly selective oxidation of benzyl alcohols, while simultaneously promoting the oxidative coupling reactions of benzylamines and the selective oxidation reactions of sulfides. The cobalt zeolite catalyst provided by this invention has clearly defined application scenarios, mild reaction conditions, and demonstrates significant industrial application potential, providing important theoretical reference and practical direction for catalyst development in the field of green organic synthesis.

The invention provides a flowing membrane electrode for electrolytic hydrogen production coupled alcohol oxidation and an electrolytic hydrogen production coupled alcohol oxidation method. The flowing membrane electrode comprises an anode, an electrochemical diaphragm and a cathode; the anode and the cathode are arranged on the two sides of the electrochemical diaphragm respectively and are attached to the electrochemical diaphragm to form a sandwich structure; the thickness of the electrochemical diaphragm is 200 to 500 [mu] m; the anode and the cathode are respectively prepared by immobilizing a catalytic material in a conductive substrate; the conductive substrate has a porous structure, and the pore diameter of the porous structure is 100-500 [mu] m. By adopting an alcohol fed-batch feeding mode, through optimizing the alcohol concentration in a reaction fluid and combining with a porous structure flowing membrane electrode, relatively high selectivity of organic acid, Faraday current efficiency of an anode and hydrogen yield are realized in a long-term continuous electrolytic hydrogen production coupling alcohol oxidation reaction; the problems of low reaction rate and low accumulation amount of organic acid products are solved.

The application provides a multi-component platinum-bismuth-based intermetallic ordered nanosheet and a preparation method and application thereof, and relates to the technical field of multi-metal alloy catalysts.The multi-component platinum-bismuth-based intermetallic ordered nanosheet provided by the application comprises platinum elements, bismuth elements and auxiliary metal elements, the auxiliary elements comprise 1-4 kinds of iridium elements, ruthenium elements, osmium elements, rhodium elements, tin elements and lead elements, and the multi-component platinum-bismuth-based intermetallic ordered nanosheet has an intermetallic ordered structure and a two-dimensional nanosheet morphology.The multi-component platinum-bismuth-based intermetallic ordered nanosheet provided by the application is structurally stable, is applied to a fuel cell as a catalyst, and has excellent electrocatalytic performance, including formic acid oxidation electrocatalytic performance and alcohol oxidation electrocatalytic performance.The application provides a preparation method of the multi-component platinum-bismuth-based intermetallic ordered nanosheet, the preparation conditions are mild and simple to operate, and problems such as catalyst agglomeration caused by high-temperature calcination to transform an ordered phase are effectively avoided.

The invention provides a selective oxidation catalyst as well as a preparation method and application thereof. The main components of the catalyst are iron and molybdenum, potassium ferricyanide is added in the preparation process for modification, the structure of the catalyst is improved, the binding force between the components is enhanced, and therefore the stability and selectivity of the catalyst are improved. The catalyst prepared by the method can improve the strength of the catalyst after reaction, improve the binding force between active components and prolong the service life of the catalyst, and can be applied to preparation of aldehyde by alcohol oxidation.

The invention belongs to the technical field of electrochemical new energy conversion, and particularly relates to a preparation process of a nitrogen-doped carbon nanotube-based electrode material and high-efficiency conversion application of biomass alcohols of the nitrogen-doped carbon nanotube-based electrode material. The nitrogen doping controllable adjustment of NH2-CNT is realized by adopting a grinding and program temperature control annealing process, then the dispersion liquid is prepared, the dispersion liquid is loaded on carbon paper in a spraying and infrared lamp irradiation drying manner to prepare the electrode, and the electrode is applied to an electro-catalysis biomass alcohol oxidation system for the first time. The nitrogen-doped aminated multi-walled carbon nanotubes can realize excellent catalytic activity and biomass alcohol oxidation capacity, which are higher than those of commercial platinum-carbon and nitrogen-doped CNTs materials. The initial potential of the reaction is as low as 1.1 V vs.RHE, and the oxidation current can reach 80 mA / cm < 2 > under the potential of 1.6 V vs.RHE. The preparation process is simple, the production cost is low, industrial large-scale production is easy, and the method has wide application prospects in the fields of energy, environmental protection, electro-catalysis and the like.

The invention belongs to the field of alcohol catalytic oxidation, and particularly relates to a multi-component alloy alcohol oxidation electrode, preparation and application of the multi-component alloy alcohol oxidation electrode in an alcohol fuel cell, and the preparation method of the electrode comprises the following steps: depositing an M1-M2-M3-LDH material on a carbon-based carrier, and then performing reduction treatment to prepare an M1-M2-M3-multi-component alloy carbon-based carrier; and preparing a precursor electrode by taking the M1-M2-M3-multicomponent alloy and carbon-based carrier as an active material, and carrying out CV electrochemical etching in an acidic electrolyte by taking the precursor electrode as a working electrode to prepare the multicomponent alloy alcohol oxidation electrode, wherein M1 comprises at least one noble metal of Pt, Au, Ag, Pd and Ir; m2 comprises at least one divalent metal of Co, Ni, Cu, Zn and Mn; m3 comprises at least one trivalent metal of Ga, In, Bi, Sb and Fe; the molar weight ratio of M1 to M2 to M3 is 1: (1-8): (1-6); the number of CV circulation circles of the CV electrochemical etching is 10 to 100. The material provided by the invention can effectively resist the problem of CO poisoning, and can significantly improve the alcohol catalytic oxidation effect.

The invention relates to the field of preparation of an electro-catalytic methanol oxidation catalyst, and discloses a catalytic material as well as a preparation method and application thereof. The catalytic material comprises a carbon nanotube and ternary nanoparticles loaded on the carbon nanotube, wherein the ternary nanoparticles contain an Ni element, an Se element and a Pt element; wherein the mass ratio of the Ni element to the Se element to the Pt element is (0.1-10): (0.1-10): 1. The catalytic material disclosed by the invention is applied to an anode catalyst for electro-catalysis alcohol oxidation, especially to an anode catalyst for electro-catalysis methanol oxidation, and shows relatively good electrochemical performance.

The present application relates to a kind of molybdenum-containing catalyst composition, by adjusting the composition structure and loading mode of catalyst, thereby improving the heat transfer performance and physical strength of catalyst, adding polyethylene glycol during the preparation of catalyst to modify, so that the structure of the prepared catalyst is more fastened, the life of catalyst is extended.The catalyst prepared by the method can be applied to the industrial device for preparing aldehyde by alcohol oxidation, such as preparing formaldehyde by methanol oxidation, etc.

The invention relates to the technical field of catalysis, and discloses a supported metal-based catalyst as well as a preparation method and application thereof. The supported metal-based catalyst comprises a carrier and active components, the carrier comprises nitrogen-doped carbon black, and the active components comprise Pd nanoparticles and bismuthyl carbonate; the supported metal-based catalyst contains oxygen vacancies. According to the supported metal-based catalyst, the catalytic activity of the Pd center is enhanced through the synergistic effect of Pd and bismuthyl carbonate, the catalytic efficiency is guaranteed in the alcohol oxidation esterification reaction, meanwhile, the dosage of the catalyst is reduced, and the cost is reduced.

The present application relates to a kind of catalyst for preparing aldehyde by oxidation method and its application, the catalyst is prepared by coprecipitation method, add trimethylol ethane and macromolecular polymer polyphenyl diamide during preparation process and modify, improve catalyst structure, enhance the binding force between components, so as to improve the stability and selectivity of catalyst.The catalyst prepared by the method can be applied to alcohol oxidation to prepare aldehyde industrial device, such as methanol oxidation to prepare formaldehyde, etc.

The invention discloses a bimetallic-doped metal organic framework material Pd-Cu-coated UiO-66-NH2, a Pickering emulsion based on the bimetallic-doped metal organic framework material Pd-Cu-coated UiO-66-NH2 and application of the Pickering emulsion, and belongs to the technical field of catalysts. The preparation method comprises the following steps: dissolving UiO-66-NH2 and Cu (NO3) 2.3 H2O in deionized water, and mixing and stirring to obtain Cu-coated UiO-66-NH2; the preparation method comprises the following steps: dissolving Cu-coated UiO-66-NH2 and Na2PdCl4 in deionized water, mixing and stirring, and then adding sodium borohydride for reduction, so as to obtain Pd-Cu-coated UiO-66-NH2. According to the invention, Pd-Cu-coated UiO-66-NH2 is used as an emulsifier, and toluene and water are used as solvents, so that the Pickering emulsion with stable Pd-Cu-coated UiO-66-NH2 is formed. The preparation method of the Pickering emulsion with stable Pd-Cu-coated UiO-66-NH2 is simple, and the Pickering emulsion shows relatively high catalytic capability and stability in an alcohol oxidation reaction.

This invention belongs to the interdisciplinary field of resource recovery from spent lithium-ion batteries and electrocatalytic energy conversion technology, and discloses a method for preparing an alcohol oxidation-coupled hydrogen production catalyst using spent ternary cathode materials. This method employs a synergistic strategy of electric field-driven delithiation and in-situ modification with iron hydroxide: first, the spent cathode material is pretreated, and then delithiation is performed via an electric field to convert it into a Ni-Co-Mn transition metal composite oxide, simultaneously recovering lithium carbonate; then, the transition metal composite oxide is mixed with iron salt, and after ultrasonic reaction, FeOOH grows in situ on the surface of the transition metal composite oxide and is loaded onto a nickel foam substrate to form a composite catalyst. The transition metal and FeOOH exhibit a significant synergistic catalytic effect, greatly enhancing the alcohol oxidation-coupled hydrogen production reaction, reducing the total electrolytic potential of water electrolysis, and improving hydrogen production efficiency. This invention features a simple process, mild reaction conditions, and combines the advantages of high-value resource recovery with low-energy hydrogen production.

The invention belongs to the crossing field of waste lithium ion battery resource recycling and electro-catalysis energy conversion technologies, and discloses a method for preparing an alcohol oxidation coupling hydrogen production catalyst by using a waste ternary positive electrode material. The method adopts a synergistic strategy of electric field driven lithium removal and iron hydroxide in-situ modification, and comprises the following steps: firstly, pretreating the waste positive electrode material, converting the waste positive electrode material into Ni-Co-Mn transition metal composite oxide through electric field driven lithium removal, and synchronously recovering lithium carbonate; then the transition metal composite oxide is mixed with ferric salt, through ultrasonic reaction, FeOOH grows on the surface of the transition metal composite oxide in situ and is loaded on the foamed nickel substrate, a composite catalyst is formed, transition metal and FeOOH have a remarkable synergistic catalytic effect, the alcohol oxidation coupling hydrogen production reaction is greatly improved, the total potential of electrolyzed water is reduced, and the hydrogen preparation efficiency is improved. The method is simple in process and mild in reaction condition, and has the advantages of high-value recovery of resources and low-energy-consumption hydrogen production.

The application discloses an Au@Pt core-shell structure supported catalyst, which comprises a carrier and Au@Pt nanoparticles supported on the carrier, the Au@Pt nanoparticles are in a core-shell structure, wherein the core layer is Au, the shell layer is Pt, the particle size of the Au@Pt nanoparticles is 2-10 nm, the diameter of the core layer is 1-3 nm, and the thickness of the shell layer is 1-7 nm. The application further discloses a preparation method of the Au@Pt core-shell structure supported catalyst and application of the catalyst in an alcohol oxidation process. According to the method, the alcohol oxidation catalyst can be prepared only through room-temperature liquid-phase reduction, the process is simple and convenient, the prepared catalyst has a unique core-shell structure, and the catalyst has excellent catalytic activity and stability, so that the reaction system can realize high conversion rate oxidation of alcohol to obtain corresponding carboxylic acid without adding an external alkali.

Disclosed are a genetically engineered bacterium catalyzing the production of a quinoline compound, and a use thereof. The genetically engineered bacterium expresses monoamine oxidase and an enzyme capable of catalyzing alcohol oxidation, the enzyme capable of catalyzing alcohol oxidation being selected from alcohol oxidase or alcohol dehydrogenase. It has been unexpectedly discovered that monoamine oxidase coupled to alcohol dehydrogenase or alcohol oxidase can catalyze the preparation of quinoline from amino alcohol substrates, which fills the gap that current biocatalysis methods cannot synthesize amino alcohol substrates into quinoline compounds.

The application discloses a Pd@UIO66-NH2@COF Pickering emulsion based on a core-shell structure and a preparation method and application thereof, and belongs to the field of catalytic synthesis. The Pd@UIO66-NH2@COF is used as an emulsifier, toluene and water are used as solvents, and a Pd@UIO66-NH2@COF stable Pickering emulsion is formed. The Pd@UIO66-NH2@COF stable Pickering emulsion disclosed by the application has the advantages of simple preparation method and high catalytic capacity and stability in alcohol oxidation-Knoevenagel series reaction.

The invention discloses a method for preparing aldehyde or ketone by catalytically oxidizing alcohol, which is characterized in that in the presence of an oxonium nitrate compound, an alcohol compound is subjected to oxidation reaction to generate corresponding aldehyde or ketone. The method provided by the invention has the advantages of mild reaction conditions, wide substrate universality, and realization of efficient catalysis of alcohol oxidation without metal and other co-catalysis in the reaction, and is a method suitable for industrial production.

This invention discloses a method for preparing 6,10,10-trinitro-2-oxa-6-azaadamantane-4,8,9-triol trinitrate, belonging to the field of organic synthesis technology. Using 1,3,5,7-cyclooctatetraene as a starting material, the method involves oxidative cyclization, ammonolytic cyclization, Boc protection and silane ether protection, secondary alcohol oxidation, deBoc acetylation, oximeization, geminitrohydration, and nitration to finally synthesize 6,10,10-trinitro-2-oxa-6-azaadamantane-4,8,9-triol trinitrate. The synthesis method is simple, and the final product exhibits stable properties. This invention addresses the lack of research on "azaadamantanes" (alkanes with nitrogen and oxygen heteroatoms synergistically introduced onto the same adamantane skeleton) and the general lack of substituents available for in-depth functionalization in existing adamantane skeleton construction methods. Furthermore, it introduces six explosive groups into the synthesized skeleton, resulting in a product with high density and excellent detonation performance.

The application discloses a polyhydric alcohol oxidation alternating current electrolysis method, a membrane-free electrolysis device and a large-scale electrolysis system, and belongs to the technical field of new energy chemical industry. In order to solve the problems of the poisoning of the noble metal catalyst in the traditional electrocatalytic polyhydric alcohol technology, and the high energy loss and high construction and operation cost of the traditional direct current power supply mode, the application uses a noble metal-based catalyst as a working electrode in an electrolysis system, uses polyhydric alcohol and an aqueous electrolyte as working electrode substrates, applies alternating current between the working electrode and a counter electrode, and generates high-value-added products and hydrogen through electrocatalysis. A membrane-free electrolysis device and a large-scale electrolysis system are designed for the alternating current electrolysis process. The device and the system can realize high current density, super-long stability and efficient production, greatly reduce the cost and reaction energy consumption, improve the production efficiency and economy, and are expected to be applied to actual production.

This invention discloses a method for preparing and applying phosphorus-doped palladium-molybdenum alloy ultrathin two-dimensional nanomaterials. The nanomaterials are prepared via a wet chemical method, exhibiting good dispersibility and a thin, curved two-dimensional structure with a lateral dimension of several hundred nanometers and a thickness of approximately 1.2 nanometers. Catalysts prepared by combining phosphorus-doped palladium-molybdenum alloy ultrathin two-dimensional nanomaterials with carbon are applied to the electrocatalytic oxidation of alcohols, demonstrating excellent activity and stability for various alcohols. The mass activities for the electrocatalytic oxidation of methanol, ethanol, ethylene glycol, and glycerol reach as high as 2.32 Å mg, respectively. ‑1 Pd 4.95A mg ‑1 Pd 4.06 mg ‑1 Pd 4.98A mg ‑1 Pd The phosphorus-doped palladium-molybdenum alloy ultrathin two-dimensional nanomaterial catalyst disclosed in this invention can greatly reduce catalyst costs and improve electrocatalytic alcohol oxidation performance, showing promising application prospects in the field of alkaline direct alcohol fuel cells.