93 results about "Reaction intermediate" patented technology

The invention discloses a liquid metal-based catalyst with flowable amorphous cobalt active sites as well as a preparation method and application of the liquid metal-based catalyst. The spherical gallium-based liquid metal loaded amorphous cobalt nanosheet material is synthesized by using a sodium borohydride ice bath method. Due to the optimization of the synthesis process, the amorphous cobalt nanosheets are uniformly distributed on the surfaces of the liquid gallium balls, are small in size, are high in utilization rate and are not easy to agglomerate; the intrinsic flow characteristic of the liquid metal gallium realizes the efficient reverse hydrogen overflow effect, optimizes the formation process of a catalytic reaction intermediate, and accelerates the formation of the intermediate. The composite material has the advantages of low overpotential, high Faraday efficiency, high ammonia production rate, good stability and the like during nitrate electrocatalytic reduction reaction, meets the requirements of production and use, and is low in preparation cost.

According to the catalyst for generating ethylene through electrocatalytic reduction of carbon dioxide, a CuO / SrCO3 heterojunction is synthesized through high-temperature liquid-phase pyrolysis and carbonization, an energy barrier of a reaction intermediate can be optimized through the electron effect of a heterojunction interface carried by the catalyst, efficient adsorption of OCHCHgroups of the reaction intermediate is achieved, and the catalytic activity of ethylene is improved. Further proton coupling of the intermediate is promoted, and finally, a target reduction product C2H4 is efficiently generated; meanwhile, the stability of the structure is guaranteed by a stable heterojunction surface of the heterojunction, so that the heterojunction has excellent durability.

This invention discloses a supported zirconium-based catalyst, its preparation method, and its application. It includes a zirconium-based support and a noble metal supported on the zirconium-based support. The zirconium-based support includes one or more of a zirconium-based composite oxide support and a zirconium-based metal-organic framework material. The zirconium-based composite oxide support includes a composite of zirconium oxide and other oxides, and the other oxides include oxides of one or more elements selected from Si, P, Ce, and Mg. The above-mentioned supported zirconium-based catalyst increases the interaction between the supported noble metal and the support by introducing Si, P, Ce, or Mg into the zirconium-based support to adjust the electron cloud density or oxygen vacancy concentration of the zirconium-based support. By using a zirconium-based metal-organic framework material with regular channels to support the noble metal, reactants and products can diffuse relatively quickly and smoothly, thereby avoiding excessive side reactions and carbon deposition caused by excessive retention of reaction intermediates or products.

The invention discloses a medium-entropy catalyst based on a self-reduction strategy as well as a preparation method and application of the medium-entropy catalyst, and belongs to the technical field of catalysts. The preparation method of the medium-entropy catalyst based on the self-reduction strategy comprises the following steps: jointly dissolving a non-Cu metal salt of which the metal activity is weaker than that of iron, a Cu salt, a metal coordination agent and a surfactant into water to prepare a plating solution, and immersing foam iron serving as a substrate into the plating solution for 10-60 minutes for entropy increase to obtain the medium-entropy catalyst, the molar ratio of Cu to non-Cu metal in the plating solution is (1-2): (1-4). The adsorption / desorption behavior of a reaction intermediate is optimized by cooperatively regulating an electronic structure through multiple elements, and the method has important significance for improving the performance of the NO3RR.

The application provides a regeneration method of halogenated nitrobenzene continuous hydrogenation catalyst, and relates to the technical field of fixed bed halogenated nitrobenzene hydrogenation. The regeneration method mainly comprises the following steps: using alcohol, alkali, petroleum ether and ethyl acetate to preliminarily clean the bed layer, removing azo compounds and other pollutants on the surface of the catalyst by using the special properties of ionic liquids, and then completing the regeneration of the catalyst through the steps of pickling, precious metal solution treatment and drying. The application overcomes the defects of the prior art, has the advantages of simple operation, mild conditions and low cost, realizes the in-situ removal of surface impurities such as reaction intermediates and azo compounds on the catalyst surface without damaging the structure of the catalyst and disassembling the catalyst, further supplements the lost metal active components, and can effectively restore the catalyst activity.

The invention relates to an asymmetric iridium monatomic nano enzyme Ir-S / N-C and a preparation method thereof. S atoms are introduced, an active center with an Ir-S1N3 asymmetric coordination structure is constructed, the electronic structure of the iridium active center is effectively changed, the center position of a d band of the iridium active center is moved upwards, the adsorption / desorption behavior of a reaction intermediate is optimized, a reaction energy barrier is remarkably reduced, and the reaction efficiency is improved. The activity of the oxidoid enzyme reaches 27.98 U / mg, and the activity of the peroxidase reaches 330.24 U / mg; the invention further relates to application of the asymmetric iridium monatomic nano enzyme Ir-S / N-C in preparation of a product for detecting cholinesterase. According to the detection strategy, unstable H2O2 does not need to be additionally added, the operation steps are simplified, the stability and anti-jamming capability of a system are improved, and false positive signals are effectively reduced. Experiments prove that the constructed detection method has a good linear relation and high sensitivity on detection of cholinesterase, the detection limit is as low as 0.21 U.L <-1 >, and great application potential in the fields of biomedical diagnosis and environmental monitoring is shown.

The invention provides a method and equipment for screening an electrochemical alloy oxide catalyst. Comprising the following steps: utilizing a trained machine learning model to predict the difference of second adsorption free energy of each predicted active site on the surface of an alloy oxide to be detected to an electrochemical reaction intermediate; obtaining the first average current density and the uncertainty of the current density based on the difference of the second adsorption free energy of each predicted active site; determining a pre-selected alloy oxide by using the acquisition function to obtain a second average current density of the pre-selected alloy oxide; and under the condition that the difference value between the second average current density and the obtained maximum value of the first average current density is smaller than a preset value, determining that the pre-selected alloy oxide is the target alloy oxide catalyst for the electrochemical reaction. In this way, the electrochemical alloy oxide catalyst with high electrochemical catalytic activity can be rapidly screened out.

The present invention provides a process route for producing auristatin derivative intermediates, which effectively avoids the use of norephedrine in the synthesis route compared to the prior art. Furthermore, the process route for auristatin derivative intermediates according to the present invention allows for the production of the target product in a single step, effectively avoids the generation of reaction intermediates, has a simple purification method, and produces a high yield and purity of the final product, making it suitable for industrial-scale scaling up.

The invention provides a compound for an oil-based drilling fluid viscosity reducer and the oil-based drilling fluid viscosity reducer. The preparation method of the compound for the oil-based drilling fluid viscosity reducer comprises the following steps: mixing polyethylene polyamine, alcohol amine and humic acid for reaction to obtain a first reaction intermediate; and reacting the first reaction intermediate with a fluorine-containing silane coupling agent to obtain the compound for the oil-based drilling fluid viscosity reducer, wherein the ratio of the amount of substance of the humic acid to the polyethylene polyamine to the alcohol amine to the fluorine-containing silane coupling agent is 1 to (0.5 to 0.75) to (0.01 to 0.5) to (0.5 to 5). The viscosity reducer for the oil-based drilling fluid comprises the compound for the viscosity reducer for the oil-based drilling fluid, a fluorine-containing surfactant and an oil-phase solvent in a mass ratio of 100: (10-50): (20-80). The oil-based drilling fluid viscosity reducer provided by the invention has excellent high temperature resistance.

Provided is a method for producing an olaparib precursor, said method comprising the step of performing the following steps (a) to (c) continuously without isolating a reaction intermediate. (a) Reacting dimethyl(3-oxo-1,3-dihydro-2-benzofuran-1-yl)phosphonate and 2-fluoro-5-formylbenzoic acid in DMF, acetonitrile, or THF and in the presence of diazabicycloundecene. (b) Reacting the reaction mixture obtained in the reaction of (a) with hydrazine. (c) Adjusting the reaction liquid obtained in the reaction of (b) to a pH of not more than 4, to obtain 2-fluoro-5-(4-oxo-3,4-dihydro-phthalazine-1-ylmethyl)-benzoic acid, which is an olaparib precursor.

The invention provides a tackifying and shear strength improving agent, a preparation method thereof and an oil-based drilling fluid containing the tackifying and shear strength improving agent. The preparation method comprises the following steps: mixing a first surfactant, montmorillonite and rectorite, and carrying out a first reaction to obtain a first reaction intermediate; mixing the first reaction intermediate with a second surfactant, and carrying out a second reaction to obtain a second reaction intermediate; mixing the second reaction intermediate with a fluorine-containing quaternary ammonium salt surfactant, and carrying out a third reaction to obtain a third reaction intermediate; and mixing the third reaction intermediate with a silane coupling agent modified nano material under an alkaline condition, and carrying out a fourth reaction to obtain the tackifying and shear strength improving agent for the oil-based drilling fluid. The obtained tackifying and shear strength improving agent is used for the oil-based drilling fluid, and has excellent tackifying and shear strength improving effects and ultrahigh temperature resistance.

The application belongs to the technical field of catalytic chemistry and porous materials, and specifically discloses a kind of vacancy anchoring full-silicon core-shell monatomic catalyst and its preparation method, the application makes Fe highly dispersed in the form of monatomic through the synergistic anchoring effect of silicon vacancy and ligand, avoids the metal oxide cluster produced by traditional impregnation method, inhibits excessive pyrolysis caused by local overheating, reduces the generation of gas impurities such as low-carbon alkane, the crystalline shell layer of the catalyst shortens the diffusion path of the product dimethyl ethylene ketone, DMK molecules can be quickly desorbed and leave the active center after generation, the content of by-product dimers is reduced, the structure of the catalyst improves the feed rate and accelerates the product diffusion, prevents the secondary reaction of reaction intermediates in the pore, greatly reduces the carbon deposition rate, forms a hydrophobic gradient layer by MTES modification, effectively repels the associated by-products isobutyric acid generated in the reaction, blocks the DMK polymerization reaction, thereby maintaining the yield of the target product DMK.

The invention discloses a trace antimony (Sb) doped palladium (Pd)-based catalytic material as well as a preparation method and application thereof, and belongs to the technical field of electrocatalytic carbon dioxide reduction. The catalytic material is prepared by taking a palladium precursor and an antimony precursor as metal sources and adding a structure-directing agent into an alkaline mixed solvent through a one-step solvent hydrothermal method. By introducing a trace amount of Sb element, the electronic structure of Pd is effectively regulated and controlled, and the adsorption behavior of a reaction intermediate is optimized, so that the performance of Pd in an electro-catalysis carbon dioxide reduction reaction is remarkably improved. An electrochemical test shows that under a neutral condition (0.5 M KHCO3), the catalytic material can improve the carbon monoxide Faraday efficiency of Pd from 40% to 80%, and shows excellent catalytic activity and good stability. The method is simple in synthesis process, mild in condition and good in repeatability, and the obtained catalytic material is controllable in structure and has a wide application prospect in the field of electrocatalytic carbon dioxide reduction.

The invention belongs to the technical field of organic photochemical synthesis and catalysis, and discloses application of a spin catalyst based on a macrocyclic gadolinium complex in photooxidation reduction reaction. According to the spin catalyst, the high-spin ground state of gadolinium ions is utilized, intersystem crossing of a photoreaction intermediate singlet-state free radical ion pair to a triplet-state free radical ion pair is promoted through the paramagnetic effect, and the reverse electron transfer process is effectively inhibited. Particularly, in a water-containing system, the Gd-DOTP complex induces solvent water molecules to form an ordered hydrogen bond network through a phosphonic acid group on a ligand, a proton-mediated spin transmission channel is constructed, and efficient catalysis can be achieved under the millimole-level low concentration (0.53.0 mM). The system obviously inhibits BET, improves the organic photooxidation reduction reaction efficiency, is suitable for reactions such as halogenated aromatic hydrocarbon dehalogenation and benzene oxidation hydroxylation, and has the advantages of small catalyst dosage, good stability, wide application range and the like.

The invention relates to the technical field of tert-butyllithium preparation, in particular to a tert-butyllithium preparation method which comprises the following steps: preparing raw materials, dissolving lithium and washing oil, mixing the raw materials to start reaction, dropwise adding a modifier, carrying out heat preservation treatment, cooling, settling and taking clear liquid. According to the method, trace impurities on the surface of lithium are removed in the pretreatment link, the PVP coating can block contact of water, oxygen and lithium in a long-acting mode, lithium is prevented from going bad in the earlier stage of storage and reaction, and meanwhile the compatibility of lithium and organic solvents such as n-pentane is enhanced; the interference of impurities on the reaction can be eliminated in a high-purity state of the chlorinated tert-butane, byproducts such as lithium tert-butoxide are prevented from being generated, the moisture in the system is strictly limited by deep dehydration, a stable anhydrous environment is provided for synthesis of the tert-butyllithium, and the reaction efficiency is guaranteed; the operation of deep dehydration and impurity removal by activated aluminum oxide creates a high-cleanliness solvent system for the reaction, avoids the action of water and polar impurities with tert-butyllithium or reaction intermediates, and prevents product decomposition or impurity generation.

This invention provides a multi-scale neighborhood synergistic catalyst, its preparation method, and its applications. The method uses nitrogen-doped carbon nanotubes (NCNTs) as a structural platform, achieving precise construction of Al diatomic sites through vapor-phase migration, trapping, and reduction fixation of volatile metal precursors. Furthermore, it combines secondary vapor-phase deposition to drive the surface deposition and nucleation of metal-containing Y species, resulting in in-situ growth into metal nanoclusters to obtain Al2-Y. NC / NCNT catalyst. In this catalyst, Al species are atomically dispersed and exhibit coordination unsaturation, while metallic Y is anchored to its neighboring interface in the form of nanoclusters. Both maintain a stable nearest-neighbor structure under the confinement and anchoring effect of carbon nanotube doping sites. The Al2 sites can regulate the selective adsorption configuration and electronic state of reaction intermediates, while the Y nanoclusters provide efficient hydrogen molecule activation and overflow hydrogen supply channels. Together, they lower the energy barrier of key hydrogenation steps and suppress excessive hydrogenation side reactions. This invention features mild conditions, a simple process, and exhibits excellent hydrogenation activity and selectivity.

The invention discloses a metal-doped VOOH nano-enzyme material with a hollow spherical shell structure as well as a preparation method and application of the metal-doped VOOH nano-enzyme material, and belongs to the technical field of nano-materials and biological catalysis. The invention aims to solve the problems that the peroxidase-like activity of the existing pure-phase VOOH nano material is relatively limited, the electronic structure of the pure-phase VOOH nano material is not in the optimal state of catalyzing H2O2 decomposition, and the adsorption / desorption energy barrier of a reaction intermediate is relatively high. The chemical general formula of the metal-doped VOOH nano-enzyme material with the hollow spherical shell structure is M-VOOH, and M is a doped metal element. The preparation method comprises the following steps: 1, dissolving a precursor; 2, acidity adjustment; 3, doping metal; and 4, reduction and crystallization. According to the application, the catalyst serves as a peroxidase-like catalyst to catalyze decomposition of hydrogen peroxide.

The invention relates to a composite coating copper electrode for improving the performance of a C2 product prepared by reducing carbon dioxide through electro-catalysis and a preparation method of the composite coating copper electrode, and belongs to the technical field of catalysis and energy. The core of the invention is to provide a synergistic modification strategy for simultaneous coating of micromolecules and polymers. Specifically, benzotriazole (BTA) and polyvinyl chloride (PVC) are mixed, and the copper surface is coated with the mixture at a time to form the composite coating. Through the synergistic effect of BTA and PVC, key reaction intermediates (such as * COOH and * COCOH) can be effectively stabilized, an electronic structure is optimized, and C-C coupling is remarkably promoted. Experiments show that: Cu-BTAamp; the PVC electrode is arranged in an H-type electrolytic tank, and the Faraday efficiency of the product can be improved from 36% to 71.0 + / -5.6%. In addition, the PVC matrix can effectively package and fix BTA, and the long-term stability of a catalytic system is greatly enhanced. The method is simple, low in cost and high in universality, and a new technical approach is provided for efficient and stable reduction preparation of high-value multi-carbon fuel.

This invention discloses a method for producing aromatics from carbon dioxide via a bifunctional catalyst of zinc oxide-zirconia@C / hierarchical porous nano-ZSM-5 molecular sieve. The invention addresses the problems of low selectivity for aromatics and excessively high selectivity for byproducts in existing catalysts used in the carbon dioxide hydrogenation conversion reaction. The method involves pyrolyzing a zinc-modified organometallic complex under a nitrogen atmosphere to prepare a ZnO-ZrO2@C composite metal oxide, which is then mixed with a modified hierarchical porous nano-ZSM-5 molecular sieve to form a bifunctional catalyst. This catalyst is then loaded into a fixed-bed reactor, activated under a nitrogen atmosphere, and then a mixture of carbon dioxide and H2-Ar gas is introduced into the reactor. Aromatics are produced under controlled reaction conditions. The bifunctional catalyst used in this invention improves the diffusion performance of reaction intermediates and aromatic products, suppresses side reactions such as reverse water-gas shift and excessive hydrogenation, and significantly improves the carbon dioxide conversion rate and the selectivity for tetramethylene-rich aromatics.

The invention discloses a preparation method of a boron-doped copper-silver bimetallic catalyst for electro-catalysis CO2 reduction, and belongs to the technical field of micro / nano material preparation and electro-catalysis CO2 reduction. The boron-doped copper-silver bimetallic catalyst is synthesized through a two-step method, copper nitrate is used as a copper source, silver nitrate is used as a silver source, sodium borohydride is used as a boron source, the boron-doped copper-silver bimetallic catalyst is synthesized through normal-temperature stirring and high-temperature calcination, and then the boron-doped copper-silver bimetallic catalyst is used as a template to be subjected to electrochemical reduction, so that ethylene can be prepared through high-efficiency and high-selectivity electro-catalysis of CO2 reduction. The method disclosed by the invention is simple to operate, economical and practical, the boron-doped copper-silver bimetallic catalyst is beneficial to electron transfer and adsorption of reaction intermediates, the efficiency and the selectivity of preparing ethylene by electrocatalytic CO2 reduction are higher, and the method has very good industrial application potential.

The invention discloses a preparation method and application of a catalyst for preparing formic acid from CO2 under high current density, and belongs to the field of CO2 electroreduction. According to the catalyst, InO (OH) is used as a substrate, ionic liquid is introduced to modify the substrate, and the ionic liquid is prepared from corresponding chlorinated quaternary phosphonium salt and trifluoromethanesulfonamide through a reaction. Wherein quaternary phosphonium cations can form a local electric field at a cathode in CO2 electroreduction, a reaction intermediate of formic acid is stably generated, and the product selectivity is greatly improved. Anions have very strong hydrophobicity, remarkably inhibit hydrogen evolution side reaction, have the effect of enriching CO2, and can form a high-concentration CO2 local microenvironment. Under the synergistic effect of anions and cations, the problems that an indium-based catalyst is weak in CO2 adsorption capacity, low in catalytic activity and the like are effectively relieved, and the catalyst still has good formic acid Faraday efficiency under the ampere-level current density. The preparation method is simple and easy to popularize.

The invention discloses a CoN-C three-function catalyst regulated and controlled by rare earth metal Er as well as a preparation method and application of the CoN-C three-function catalyst. According to the catalyst, Er2O3 and CoN-C are compounded to form a heterostructure, 4f orbital electrons of Er are utilized to regulate and control interface charge distribution, interaction between the catalyst and a reaction intermediate is enhanced, meanwhile, Er2O3 forms a protective layer on the surface of an active site, and metal agglomeration and dissolution are effectively inhibited. The catalyst has the optimal CoN-C active site density after being annealed at 600 DEG C, and shows excellent OER, HER and ORR electrocatalytic activity and stability. The preparation method is simple, low in cost and suitable for green energy conversion systems such as water electrolysis hydrogen production, zinc-air batteries and the like, and has a good application prospect.

The invention provides a method for preparing 5 alpha-hydroxyl laxogenin by a one-pot method, which comprises the following steps: S1) dissolving diosgenin in a mixture of an organic solvent and water, adding a halogenating reagent, and heating for reaction after dissolving to obtain a dihydroxylation intermediate; s2) adding an oxidizing agent into the reaction liquid obtained in the step S1), adding a quenching agent after reaction, adding a mixture of an organic solvent and water after vacuum concentration, pulping, filtering and drying to obtain a 5 alpha-hydroxyl laxogenin crude product; s3) adding a pulping solvent into the crude product obtained in the step S2), heating, pulping and filtering to obtain a wet product; and adding a recrystallization solvent into the wet product, heating for dissolving, dropwise adding a crystallization solvent for crystallization, carrying out gradient cooling, filtering, and drying to obtain the 5 alpha-hydroxy laxogenin. The method avoids introducing a protecting group, so that the reaction route is greatly shortened; reaction intermediates do not need to be separated and purified, reaction procedures are reduced, and production cost is reduced; the refined finished product is relatively high in purity and stable in quality; the reaction conditions are mild.

This invention discloses a ruthenium complex-modified nickel-based metal framework material, its preparation method, and its application in the electrocatalytic reduction of nitrate to ammonia. The method includes: adding a DMAC solution of terephthalic acid to an aqueous nickel chloride solution, mixing, adding the ruthenium complex, transferring the resulting solution to an autoclave for solvothermal treatment, immersing the resulting precipitate in an aqueous ammonium hexafluorophosphate solution, and stirring at room temperature to obtain RuNi-BDC. The introduction of the ruthenium complex, through the interaction between its organic ligands and the MOF framework, achieves high dispersion of ruthenium species, increases the exposure of active sites, and enhances the structural stability of the material. This system optimizes the adsorption energy for reaction intermediates, transforming the catalytic mechanism from single Ni catalysis to Ni-Ru bimetallic synergistic catalysis, effectively lowering the energy barrier of the rate-determining step of nitrate reduction, and improving the activity of the electrocatalytic nitrate reduction reaction, providing a new approach for achieving efficient electrocatalytic reduction of nitrate to ammonia.

The invention relates to a system and a method for synthesizing acetic acid by directionally converting carbon monoxide through photoelectrocatalysis and application of the system, the system is a photo-assisted electrocatalysis reaction system and comprises a cathode and anode reaction tank and a photo-assisted component, and a cathode catalyst adopted by the cathode and anode reaction tank is a copper-based catalyst directly loaded on the surface of carbon paper; the photo-assisted assembly comprises a light source and a quartz glass plate, visible light is used as an excitation light source, the cathode catalyst layer is directly irradiated through the quartz glass plate, the evolution path of a surface reaction intermediate is changed, and carbon monoxide is promoted to be directionally converted into acetic acid. Compared with the prior art, the maximum current density exceeds 900 mA / cm < 2 >, excellent acetic acid selectivity and production efficiency are still kept after continuous operation for 270 hours or above, and the reaction system is more efficient and stable.

The invention relates to a preparation method of an organic acid anion regulation hydrogen bond network electrode, the method is simple and convenient in process, an MOF material containing an organic acid ligand is used as a precursor, selective structure mismatch is generated through in-situ electrochemical treatment, dissociated metal ions and hydroxyl ions in an electrolyte are subjected to secondary coordination, and the organic acid anion regulation hydrogen bond network electrode is obtained. Thus, an amorphous catalyst for anchoring organic acid anions is formed on the surface of the electrode. Organic acid anions reserved on the surface of the catalyst can construct a stable and ordered hydrogen bond network structure with water molecules on an electrode electrolyte interface, the proton transfer process is regulated and controlled, reaction intermediates are stabilized, side reactions are inhibited, and the catalytic activity is remarkably improved. The invention further relates to application of the electrode in an oxygen reduction reaction and methanol oxidation reaction coupling system, and results show that the selectivity of the electrode in the reaction system, the selectivity of target products H2O2 and the selectivity of formate both exceed 90%, and the electrode can stably run for 200 h or above and has excellent catalytic performance and stability.

The application provides a lipase mutant and application thereof, the lipase mutant of the application is that the 81th amino acid of the lipase with the amino acid sequence of SEQ ID NO:2 is changed from serine to leucine and / or the 164th amino acid is changed from valine to glutamic acid.The application realizes comprehensive optimization of enzyme catalytic conformation and reaction intermediate stability through a selected mutation strategy, so that a lipase mutant with significantly improved catalytic performance in the alpha-pinene epoxidation reaction is obtained.Compared with the wild-type lipase, the lipase mutant of the application can significantly improve the conversion rate of the alpha-pinene epoxidation reaction, and provides a high-quality enzyme source for efficient epoxidation of alpha-pinene.

The application discloses a preparation method of a cobalt-based non-noble metal catalyst and application of the catalyst in electrolysis of waste plastics, and belongs to the field of solid waste treatment and resource utilization. The application first obtains a precursor by self-assembly on a foam nickel substrate through a hydrothermal method, and then performs selenization treatment on the precursor by using a sodium borohydride reduction method to construct a heterostructure of CoBDC and CoSe. The obtained catalyst has a loose porous nanocluster shape, and the heterojunction interface is beneficial to optimizing electron distribution and effectively adjusting the adsorption behavior of a reaction intermediate on an active site, so that the activity and selectivity of electrocatalysis of a 1,4-butanediol oxidation reaction (BOR) are significantly improved, and the oxidation upgrading of PBS plastics is realized. The catalyst can efficiently convert PBS waste into high-value-added succinic acid (SA), and has both environmental benefits and economic benefits.

This invention provides a negative molecular glass photoresist compound based on hexabromotriptene, its synthesis method, and its applications, belonging to the field of photoresist resin technology. The negative molecular glass photoresist compound of this invention has a high glass transition temperature, a single molecular weight, and good thermal stability, which is beneficial for achieving high-resolution and low LWR / LER patterns. Compared with traditional positive photoresists, negative photoresists also have advantages such as high mechanical strength and low gas production, and can be widely used in the photolithography field. The synthesis process of the trimerptene derivative of this invention is simple, and the separation and purification of reaction intermediates and final products are convenient, making it suitable for industrial production. Furthermore, the core raw materials trimerptene and pinacol ester derivatives used are both produced domestically, which can completely solve the problems of high cost and difficult synthesis of semiconductor photoresists and their raw materials from the source, and has broad application prospects.

The invention discloses a preparation method of a Fe, Co and Ni trimetal monatomic spin modulation metal organic framework material, and relates to the technical field of MOF materials. The specific preparation method comprises the following steps: adding cobalt salt and nickel salt into an organic solvent, carrying out ultrasonic treatment and stirring to form an organic solvent solution of the cobalt salt and the nickel salt, sequentially adding a 2, 3, 6, 7, 10, 11-hexaamino triphenylene hexahydrochloride aqueous solution and a sodium acetate aqueous solution into the organic solvent solution of the cobalt salt and the nickel salt, and carrying out ultrasonic stirring reaction to obtain CoNi-MOF; and the CoNi-MOF is immersed in an organic solvent solution of ferric salt for standing, and a product is washed and dried to obtain the CoNi-MOF coated Fe. According to the method, Co, Ni and Fe single atoms are used as adsorption and activation sites, the adsorption energy and reaction energy barrier of the functional material to NH3 and a reaction intermediate are improved, and the electronic structure and catalytic activity of the functional material are optimized by adjusting the ratio of raw materials, the spin state of the single atom sites and the synergistic effect between metal sites. Therefore, the sensitivity, the selectivity and the detection limit of the CoNi-MOF-coated Fe on NH3 are improved.