30 results about "Electron interaction" patented technology

The invention belongs to the technical field of hydrogen storage materials, and particularly relates to a metal borohydride composite material, a preparation method thereof and a hydrogen storage material. The preparation method of the metal borohydride composite material comprises the following steps: preparing the boron-doped carbon-based carrier; the boron-doped carbon-based carrier is mixed with a metal source, a first boron source and a first solvent, hydrogen is added for a thermal reaction, metal borohydride is generated on the surface of the boron-doped carbon-based carrier in situ, and the metal borohydride composite material is obtained. According to the method, a boron-doped carbon-based carrier is prepared, boron and carbon in the boron-doped carbon-based carrier are inert elements, a chemically inert electron-deficient carrier is constructed, and metal cations in metal borohydride are induced to generate charge transfer to the carrier in the in-situ preparation process of the metal borohydride on the surface of the boron-doped carbon-based carrier. Molecular internal electron interaction of metal cations and borohydride anions is weakened, so that the thermodynamic stability of the metal borohydride is reduced.

The application discloses a kind of heterostructure supported catalyst and its preparation method and application, belong to catalytic technical field.The heterostructure supported catalyst provided by the application includes Yb oxide base and metal nanoparticles;The metal nanoparticles are loaded in the Yb oxide base;The metal nanoparticles include ruthenium and doped metal;The doped metal includes at least one of cobalt, iron or manganese.The application loads the metal nanoparticles of ruthenium and doped metal in Yb oxide base, constructs metal / oxide heterostructure, induces strong metal-support electron interaction, this interaction can effectively adjust the local electronic structure of active site, realizes the promotion of catalytic performance, so that the catalyst has the advantages of strong binding force, chemical interface stability, higher catalytic activity and stability, etc., can be prepared for good performance used in electrolytic water hydrogen evolution reaction cathode.

The invention discloses an MIL-125-NH2 encapsulated CuO composite material as well as a preparation method and application thereof in photocatalytic urea synthesis, and belongs to the technical field of photocatalytic materials. MIL-125-NH2 is used as a carrier, the ultrafine CuO nanocluster is encapsulated in a pore channel of the carrier in a precise confinement manner and is recorded as xCuO at MN, and x is the mass percent of CuO and is 1.3-4.0%. According to the composite material, CuO nanocluster atomic-scale dispersion is achieved through dual-induction confinement, the separation efficiency of photon-generated carriers is greatly improved through strong electron interaction between a subject and an object, the yield of 3.5 CuO at MN for catalyzing CO2 and N2 to synthesize urea under the conditions of normal temperature, normal pressure and visible light reaches 149 micromoles g <-1 > h <-1 >, the structural stability is excellent, and the preparation process is simple. The composite material is also applied to photocatalytic urea synthesis, the reaction takes visible light as an energy source and an aqueous solution as a system, high temperature and high pressure are not needed, the composite material is green and environment-friendly, and a high-efficiency catalyst and technical support are provided for industrial application of photocatalytic urea synthesis.

The invention relates to the technical field of artificial olfaction and intelligent sensing, and discloses a gas recognition method and system based on a physical-data dual-drive framework. The method comprises the following steps: acquiring a macroscopic dynamic sensing signal triggered by target gas on a sensor array containing atomic-scale catalytic active sites, and a microscopic physical descriptor for representing an atomic-scale electron interaction rule between gas molecules and the catalytic active sites; and the data branch network and the physical branch network are respectively input into the data branch network and the physical branch network for feature extraction and mapping, cross-modal fusion is carried out through a feature fusion sub-module to obtain joint feature representation constrained by a physical rule, and accordingly, a gas category identification result is output. According to the method, the microcosmic physical descriptors are fused into the model reasoning logic, so that the recognition precision of the structural similar object is effectively improved.

The invention discloses a heteronuclear cerium-germanium complex and a preparation method and application thereof, and belongs to the technical field of organic synthesis.The heteronuclear cerium-germanium complex is a cerium-germanium complex A, a cerium-germanium complex B or a cerium-germanium complex C. Cerium and germanium centers of the complexes are in a specific space adjacent state; the cerium-germanium complex A, the cerium-germanium complex B and the cerium-germanium complex C have unique structures, so that the cerium-germanium complex A, the cerium-germanium complex B and the cerium-germanium complex C become an ideal fundamental research carrier. The method can be used for in-depth exploration of electron interaction or spin coupling possibly existing between cerium and germanium through a ligand skeleton; the two independent metal centers have synergistic reaction activity in a limited space; such structures have potential properties in molecular magnetic or luminescent materials. Therefore, the invention not only enriches the structure types of the rare earth-main group element complex, but also provides a new platform with accurate structure and adjustable performance for the basic research of multi-center metal organic chemistry, and has definite scientific significance and potential application exploration value.

The invention relates to a solid sulfur positive electrode catalytic material, a preparation method and an application, the solid sulfur positive electrode catalytic material comprises a carrier, a first transition metal atom and a second transition metal atom, the first transition metal atom and the second transition metal atom are loaded on the carrier, the carrier is a nitrogen-doped carbon material, and the electronegativity difference value delta EN of the first transition metal atom and the second transition metal atom is more than or equal to 0.01 and less than or equal to 0.5. The solid sulfur positive electrode catalytic material disclosed by the invention can generate a dynamic electron buffer effect in a sulfur conversion reaction process of an all-solid-state battery, and is beneficial to adjusting the charge state of a metal center through reversible electron migration between diatoms during charging and discharging, so that the excessive oxidation or reduction of active sites is inhibited; the structural stability and the valence reversibility of the material in long-term circulation are improved. Meanwhile, the synergistic effect of double atoms can enhance the electron interaction with sulfur substances, so that the solid-solid interface reaction energy barrier can be reduced, and the sulfur conversion reaction kinetics can be improved.

This invention discloses the application of a carbon-modified noble metal catalyst in the low-temperature combustion of propane or mixed alkanes. The carbon-modified noble metal catalyst is prepared by adding sodium hydroxide solution dropwise to a cerium salt solution, mixing, and reacting to obtain a cerium dioxide support. The cerium dioxide support is then impregnated in an equal volume of noble metal salt solution, dried, and calcined. The calcined product and glucose are added to deionized water, mixed, and subjected to a hydrothermal reaction, followed by drying and calcination to obtain the final product. In this invention, carbon species exist in the form of doping or interstitial filling, inducing lattice distortion and a high concentration of surface oxygen vacancies in the support, significantly improving the mobility of lattice oxygen and the reactivity. Simultaneously, the interfacial carbon species optimize the microelectronic environment of the active center through strong electron interactions, maintaining the low valence state of Ru and the metallic states of Pt and Pd. This catalyst effectively avoids the shielding effect of the carbon layer and exhibits excellent catalytic combustion activity and stability for propane and mixed alkanes at low temperatures.

The application relates to a luminol-embedded iron-based metal organic framework composite material and a preparation method and application thereof, and belongs to the technical field. The application discloses a preparation method of a luminol-embedded iron-based metal organic framework composite material (luminol@Fe-DOBDC MOFs), mainly adopting 2,5-dihydroxyterephthalic acid (DOBDC) as an organic linking agent, and Fe in FeCl3.6H2O 3+ As a metal node, Fe-DOBDC MOFs (Fe 3+ And the electronic interaction between the carboxyl groups, the fluorescence of the ligand is significantly quenched, and the stirring reaction with luminol can obtain a fluorescent double-emission composite material, that is, the luminol-embedded iron-based metal organic framework composite material (luminol@Fe-DOBDC MOFs).

A method for simulating a quantum-capacitance response of a material configuration comprises (a) constructing a non-interacting Hamiltonian for the material configuration based on input data; (b) computing a natural-orbitals basis for each of a plurality of parts of the material configuration under the non-interacting Hamiltonian; (c) projecting the non-interacting Hamiltonian in the natural-orbitals basis to obtain a non-interacting quantum-mechanical description for each part; (d) constructing an interacting Hamiltonian by adding an electron-interaction term to the non-interacting Hamiltonian for each of the plurality of parts; (e) for each of a plurality of representative points in a sample space of at least one tunable parameter of the material configuration, using a sums-of-Gaussians procedure to assemble a basis of Gaussian states for approximating low-energy eigenstates of the material configuration under the interacting Hamiltonian; (f) for each of a plurality of vicinities of representative points in the sample space, combining bases of Gaussian states assembled for nearby representative points to form an extended basis; and (g) forecasting the quantum-capacitance response within the sample space using the extended basis.

A method for simulating a quantum-capacitance response of a material configuration comprises (a) constructing a non-interacting Hamiltonian for the material configuration based on input data; (b) computing a natural-orbitals basis for each of a plurality of parts of the material configuration under the non-interacting Hamiltonian; (c) projecting the non-interacting Hamiltonian in the natural-orbitals basis to obtain a non-interacting quantum-mechanical description for each part; (d) constructing an interacting Hamiltonian by adding an electron-interaction term to the non-interacting Hamiltonian for each of the plurality of parts; (e) for each of a plurality of representative points in a sample space of at least one tunable parameter of the material configuration, using a sums-of-Gaussians procedure to assemble a basis of Gaussian states for approximating low-energy eigenstates of the material configuration under the interacting Hamiltonian; (f) for each of a plurality of vicinities of representative points in the sample space, combining bases of Gaussian states assembled for nearby representative points to form an extended basis; and (g) forecasting the quantum-capacitance response within the sample space using the extended basis.

The invention provides a preparation method of a copper-based catalyst, which is specifically applied to a reaction for preparing cyclohexane through benzene hydrogenation. The copper-based catalyst disclosed by the invention has relatively high dispersity, so that benzene can be hydrogenated to generate cyclohexane at a relatively low temperature. In addition, under the assistance of the auxiliary agent, the catalyst provided by the invention has more excellent catalytic performance, and almost all benzene can be converted into cyclohexane. The acid-base property of the surface of the catalyst can be regulated and controlled due to the introduction of the auxiliary agent, and the auxiliary agent can generate electron interaction with metal, so that the electronic performance of the surface of metal copper is regulated and controlled, and benzene can be converted into cyclohexane at a relatively low temperature.

In one aspect, an apparatus for use in a mass spectrometer is disclosed, which comprises an ion reaction device, which includes an ion dissociation unit (e.g., an ion-electron interaction unit) that can receive a plurality of precursor ions and cause their dissociation to generate a plurality of product ions, and a linear ion trap that can receive the product ions and isolate a target product ion of interest for mass analysis. The linear ion trap is positioned in a magnetic field and includes a set of quadrupole rods formed of a paramagnetic material to substantially shield the space between the quadrupole rods from the magnetic field, thereby reducing and preferably eliminating the interference of the magnetic field with the process of isolating the target product ion of interest.

The invention belongs to the technical field of electro-catalytic materials, and discloses a cerium-doped core-shell series catalyst, a preparation method and an application in preparation of ethylene by electro-catalytic reduction of carbon dioxide, the catalyst is an Ag coated Cu2O catalyst taking Ag as a core and cerium-doped Cu2O as a shell layer; wherein the mole percentage of Ce is greater than 0% to 10%, and the mole percentage of Ce is calculated based on the total mole number of Cu and Ce. The rare earth element cerium (Ce) is creatively introduced as a doping agent. Ce is famous for unique Ce < 3 + > / Ce < 4 + > redox pairs and excellent oxygen vacancy regulation and control capability, and is often used as an electronic auxiliary agent or a structure stabilizer in the field of catalysis. If Ce can be introduced into the Ag-coated Cu2O core-shell structure, the oxidation state of Cu is dynamically stabilized in the reaction process by utilizing the electron interaction between Ce and Cu, so that the catalytic active center is protected, and the stability and ethylene selectivity of the catalyst are improved.

The invention provides a DFT calculation model optimization method for vibration-electron interaction in an X-type dual helicene configuration, and belongs to the technical field of quantum chemistry multi-scale calculation. Firstly, experimental data of the X-type double helicene material are obtained through a spectrum technology, microscopic fine data are obtained through quantum chemistry DFT calculation, and energy barrier, vibration spectrum, electron cloud density and molecular orbital energy level data of the X-type double helicene material are obtained through combination. For a molecular aggregation state, a periodic DFT and molecular mechanics MM coupling method is adopted, an active region is described by DFT, a weak interaction region is processed by MM, and periodic characteristics of an energy band structure are calculated based on a mixed precision calculation framework. The vibration-electron interaction of the atomic scale is associated with mesoscopic characteristics such as the energy band structure and the non-radiative transition of molecules through a multi-scale coupling DFT algorithm, the macroscopic photoelectric characteristics of the material are output, and closed loop calculation from the microcosmic level to the macroscopic level is completed.

This invention relates to the field of hydrogen storage materials technology, specifically to a Pd-Y(OH)3 / NH2-rGO formic acid dehydrogenation catalyst, its preparation method, and its applications. The Pd-Y(OH)3 / NH2-rGO formic acid dehydrogenation catalyst of this invention consists of a sheet-like NH2-rGO support and Pd-Y(OH)3 nanoclusters; the Pd-Y(OH)3 nanoclusters are supported on the surface of NH2-rGO, and Pd and Y(OH)3 form a heterostructure through strong electron interactions. By introducing a non-noble metal yttrium component and forming a stable composite structure with palladium, this invention improves the activity and selectivity of the Pd-Y(OH)3 / NH2-rGO formic acid dehydrogenation catalyst while maintaining high performance and high stability. This overcomes the common problems of low catalytic activity and insufficient hydrogen selectivity in existing formic acid dehydrogenation catalysts, achieving a good balance between catalytic efficiency and material cost.

The invention provides a Ni / modified graphite phase carbon nitride photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of energy materials and photocatalysis. According to the invention, Ni atoms are loaded on graphite-phase carbon nitride, so that the graphite-phase carbon nitride is used as a proton reduction active center to promote water cracking and hydrogen desorption; nitrogen vacancies on graphite phase carbon nitride are used for enhancing benzyl alcohol adsorption activation and enriching photo-generated holes to promote the oxidation reaction of benzyl alcohol; and moreover, an atomic interface formed by Ni atoms and nitrogen vacancies remarkably accelerates carrier separation through electron interaction, spatial separation and efficient utilization of photo-induced electron-hole pairs are realized, and the activity of coupling photocatalytic hydrogen production with benzyl alcohol oxidation is further improved.

The application provides a vanadium-loaded oxygen-enriched vacancy CeO2 catalyst and a preparation method and application thereof, and relates to the technical field of metal oxide catalyst preparation. 3+ The preparation method in-situ constructs oxygen-enriched vacancies and Ce on CeO2 nanorods through secondary hydrothermal reduction, forms a high-activity platform with the defects as anchoring points to induce the formation of a Ce-O-V chemical bonding interface with strong electronic interaction. The "defect-interface" system synergistically enhances the redox capacity and electron transfer efficiency of the catalyst, significantly reduces the kinetic energy barrier of NH3 activation and formation of key intermediates. The obtained catalyst has a NO x conversion rate of 90% at a low temperature of 181 DEG C, and the activity window is widened to 181-500 DEG C. Through the above technical scheme, the problem that adsorption and activation are difficult to be considered simultaneously in the low-temperature SCR reaction is solved, and an effective solution is provided for low-temperature flue gas denitrification under flexible operation of a coal-fired power plant.

The invention discloses a high-entropy ceramic wave-absorbing material and a design method and a preparation method thereof, BaBO3 perovskite is used as a structural model, a multistage system collaborative polarization enhancement mechanism is designed, and rare earth (with relatively small ion radius, small particle size and small particle size) is used for preparing the high-entropy ceramic wave-absorbing material. The local lattice distortion is small, and low-temperature structural phase change or tiny phase change temperature deviation is easily generated), transition metals (phase change is easily generated when lattice distortion, electron interaction and magnetic coupling are easily generated and a medium temperature zone is reached) and high bond energy metals (the ion radius is large, the lattice stability and the phase change activation energy are easily improved, and the phase change temperature deviation is easily generated). The B-site doped high-entropy ceramic designed by three different types of doping systems is combined with a multi-granularity blank pressing preparation technology, so that the high-entropy ceramic wave-absorbing material has the characteristics of high strength, high stability, high compactness and high temperature resistance; and a technical guarantee is provided for designing and preparing a durable and reliable high-temperature electromagnetic wave absorbing material.

The application provides a DFT calculation model optimization method for vibration-electron interaction in X-type double-spiralene configuration, and belongs to the technical field of quantum chemistry multi-scale calculation; first, experimental data of X-type double-spiralene material is obtained through spectral technology, and microscopic detailed data is obtained through quantum chemistry DFT calculation, so that the energy barrier, vibration spectrum, electron cloud density and molecular orbital energy level data of the X-type double-spiralene material are obtained. For the molecular aggregate state, the periodic DFT and molecular mechanics MM coupling method is used, the active area is described by DFT, and the weak interaction area is processed by MM, and the periodic characteristics of the energy band structure are calculated based on the mixed precision calculation framework. The multi-scale coupled DFT algorithm is used to correlate the vibration-electron interaction at the atomic scale with the energy band structure, non-radiative transition and other mesoscopic characteristics of the molecule, and the macroscopic photoelectric characteristics of the material are output, so that the calculation closed loop from the micro to the macro is completed.

The invention provides a preparation method and application of a bidentate axial oxygen coordination Fe-N4 site oxygen reduction reaction electrocatalyst. The preparation method comprises the following steps: by taking a potassium-based metal organic framework material as a sacrificial template, preparing an ultrathin porous oxygen-enriched carbon nanosheet through high-temperature pyrolysis and an in-situ Ketching process, and then loading iron phthalocyanine FePc onto the ultrathin porous oxygen-enriched carbon nanosheet through an impregnation method, so as to obtain the bidentate axial oxygen coordination catalyst FePc-O1.61-C. According to the method, by accurately regulating and controlling the local coordination environment of active sites, the electron symmetry of a traditional planar Fe-N4 center is broken, meanwhile, the electron interaction between a metal center and a carbon carrier is enhanced, and the ORR activity and stability of the catalyst are remarkably improved.

According to the composite photocatalytic material of the oxygen vacancy immobilized platinum nano-particles, the preparation method and the application of the composite photocatalytic material in ofloxacin degradation, the oxygen vacancy (Ov) is constructed on the surface of NiCo LDH through ultraviolet radiation, then the Pt nano-particles are anchored to the Ov site through visible light reduction, and a composite structure with strong electron interaction is formed. According to the material, the carrier separation efficiency is remarkably improved (the photocurrent density is improved by 3 times, and the fluorescence intensity is reduced by 50%), the degradation rate of ofloxacin under visible light can reach 89.2% (240 min), and the activity retention rate is gt after five times of circulation; the method is suitable for treating wastewater containing humic acid in a wide pH range (4-10).

The application belongs to the technical field of hydrogen production by water electrolysis, and particularly relates to a composite dispersant, a preparation method and application thereof, and a structure formula of the composite dispersant is as follows. The beneficial effects of the application include that the composite dispersant can make the mixing of high-molecular organic matter and inorganic nano-particle slurry more uniform and stable; the bisphenol A derivative in the composition of the composite dispersant can form a strong pi-pi electron interaction with inorganic nano-material to play an anchoring role, the bisphenol A derivative has similar structural units with a diaphragm base material to improve the affinity of diaphragm slurry and the diaphragm base material support layer, the hydroxyl functional groups in the structure anchor the dispersant on the particle surface through hydrogen bonds and van der waals forces to increase the dispersing performance, the polyether as a strong polar solvation chain has good compatibility with a dispersion medium, and the particles are more stably dispersed in the slurry through a steric hindrance effect.

The invention belongs to the technical field of electro-catalysis hydrogen evolution, and particularly relates to a boron-doped carbon nanofiber loaded ruthenium metal nanoparticle HER catalyst and a preparation method and application thereof. Comprising the following steps: in a solvent, preparing a spinning solution by taking polystyrene and polyvinylpyrrolidone as solutes, soluble ruthenium salt as a ruthenium source and a boron source as a doping agent; preparing the spinning solution into a nanofiber film by adopting an electrostatic spinning process; the nanofiber film is subjected to pre-oxidation and carbonization treatment, and the boron-doped carbon nanofiber loaded ruthenium metal nanoparticle catalyst is prepared. By introducing boron doping, the electron interaction between the carbon fiber carrier and the ruthenium nanoparticles is effectively enhanced, the ruthenium nanoparticles are strongly anchored and prevented from being migrated and agglomerated in the catalysis process, the electron structure of the ruthenium active center is optimized, and the adsorption free energy of the ruthenium active center to a hydrogen intermediate is reduced; the method disclosed by the invention is simple and suitable for industrial production.

The invention discloses a diamond-like carbon layer film coated seawater oxygen evolution electrocatalyst as well as a preparation method and application thereof. Methane gas plasma irradiation is adopted, the surface of a NiFe-LDH nanosheet growing on foamed nickel in situ is rapidly reconstructed into NiFeOOH, and meanwhile a diamond-like carbon film covering layer is generated on the surface of the NiFe-LDH nanosheet. Strong electron interaction exists between the ultrathin diamond-like carbon layer and transition metal Ni and Fe in the catalyst structure, the catalytic performance of the transition metal can be improved, the diamond-like carbon film can prevent Cl from entering a catalytic interface, the adverse effects such as oxidation of Cl on an anode and erosion of the anode are effectively inhibited, and the catalytic performance of the catalyst is improved. And the OER catalytic performance and durability of the catalyst in an alkaline seawater medium are obviously improved. The catalyst shows excellent OER performance and durability under the normal temperature condition of alkaline simulated seawater (1 mol.L1 KOH + seawater) and the industrial condition of alkaline seawater (6 mol.L1 KOH + seawater, 60 DEG C and 500 mA * cm < 2 >).

The invention provides a Zn, Ni-NC / GCE electrochemical sensor for detecting luteolin. The Zn, Ni-NC / GCE electrochemical sensor comprises a working electrode and a sensing material modified on the working electrode, and the sensing material is a Zn and Ni-NC nano material. Two metal elements of zinc (Zn) and nickel (Ni) are introduced, and the electron interaction between the two metal elements is utilized, so that the electronic structure of a carbon matrix in the material is effectively regulated and controlled, and a large number of high-activity catalytic sites are created. The synergistic effect is obviously superior to that of a single metal doped material, and particularly, the adsorption energy of a reaction intermediate can be optimized in an electro-catalytic reaction, so that the catalytic activity is greatly improved. Rich defects and active sites are introduced into the precursor 2-methylimidazole, and an excellent microenvironment is provided for catalytic reaction. In the pyrolysis process, a hierarchical porous carbon material with a high specific surface area is formed. The structure is beneficial to mass transfer and diffusion of reactants, and more active sites are exposed.

The invention relates to a method for preparing hydroxymethyl sulfonate through photocatalysis of methanol and hydrosulphite by using an Au-loaded C3N4 catalyst containing B atoms, which is characterized in that methanol and a hydrosulphite solution are subjected to C-S coupling reaction through photocatalysis of the Au-loaded C3N4 catalyst containing B atoms to generate a product HMS (Hydroxymethyl Methyl Sulfonate). The Au-loaded C3N4 catalyst containing B atoms photooxidizes methanol into formaldehyde, and strong electron interaction exists between the B atoms and Au atoms, so that the Au-loaded C3N4 catalyst has good adsorption and stabilization effects on formaldehyde intermediates. According to the invention, formaldehyde is added into HSO3 <->, so that formaldehyde and HSO3 <-> can be spontaneously subjected to an addition reaction in time, HMS is generated with high selectivity, the system not only has very high HMS yield (4.8 mmol gcat <-1 > h <-1 >), but also has HMS selectivity as high as 100%; the method provides a feasible scheme for green photosynthesis of HMS.

The invention discloses a Pd / Mn / SSZ-13 molecular sieve NOx adsorption material as well as a preparation method and application thereof, and belongs to the technical field of motor vehicle tail gas treatment. A co-impregnation and / or step-by-step impregnation method is adopted, Mn species are introduced into the Pd / SSZ-13 material, the loading capacity of the Mn element is controlled, and the Pd / Mn / SSZ-13 molecular sieve NOx adsorption material is prepared. The mass ratio of the Mn element to the Pd element is (0.8-1.2): 1. On the basis of dual mechanisms of competitive ion exchange and electron modulation of Mn ions, adjacent aluminum sites in a molecular sieve framework are preferentially occupied, so that formation of hydroxylated [Pd (OH)] < + >-Z species is promoted, directional regulation and control of the form of Pd species are realized, strong electron interaction with PdOx species is generated, and weak adsorption of the Pd species to NO is inhibited. The initial desorption temperature of the NOx adsorption material is remarkably improved through the synergistic effect of the two, and a storage-release window of NOx is optimized, so that the NOx release temperature window is efficiently matched with the high-activity temperature interval of a downstream SCR (Selective Catalytic Reduction) catalyst.

The invention relates to the technical field of catalysts, in particular to a metal-modified two-dimensional transition metal boride material and a preparation method and application thereof.The preparation method comprises the steps that MAB phase solid powder and an alkoxide solution are mixed and subjected to a hydrothermal reaction, and a metal-modified two-dimensional transition metal boride material is obtained; performing ultrasonic stirring on the obtained etched transition metal boride solid powder and an intercalator, performing centrifugal separation, filtering, and drying to obtain dry powder; and mixing the dry powder with a urea aqueous solution and a metal precursor aqueous solution, filtering and drying to obtain the metal modified two-dimensional transition metal boride material. The method for preparing the metal-modified two-dimensional transition metal boride material is short in time and high in yield, and the large specific surface area, the strong nucleophilicity to oxygen and the strong electron interaction to the loaded metal of the prepared MBene material are fully utilized; a bifunctional active site can be constructed, and the conversion rate, the selectivity and the stability of the reverse water-gas shift reaction are remarkably improved.

The invention discloses preparation of a nano nickel-based catalyst and application of the nano nickel-based catalyst in preparation of tert-butylamine ethoxyethanol (TBEE). The catalyst is prepared by combining an ammonia distillation method with a direct reduction process: taking a nano metal oxide (MO, selected from SnO2, ZrO2, Al2O3 and SiO2) as a carrier, reacting a nickel salt, an auxiliary agent salt (auxiliary agents are Fe, Co, Ce and La) and an ammonia source (ammonia water or urea) at 50-150 DEG C for 5-48 hours to form a precursor, washing and drying, and directly reducing in a hydrogen atmosphere at 250-550 DEG C for 2-6 hours to obtain the catalyst. According to the catalyst, the interaction of nickel-auxiliary-carrier interface electrons is enhanced through the ammonia distillation effect, nickel electron distribution is regulated and controlled, and high-dispersion nano active sites are formed. When the catalyst is applied to a reaction for synthesizing TBEE from diethylene glycol and tert-butylamine, under the conditions of a solvent-free system, the hydrogen pressure of 1-4 MPa and the temperature of 140-180 DEG C, the conversion rate of diethylene glycol is greater than or equal to 77%, the selectivity of TBEE is greater than or equal to 89%, and the selectivity is improved by more than 25% compared with that of a catalyst prepared by a traditional precipitation method.

This invention relates to a method for preparing a class of electron-rich metal-organic framework (MOF) SO2 adsorbents. The material is a two-dimensional MOF formed by effectively coordinating electron-rich nitrogen-containing tridentate carboxylic acids (H3BTB-NH2 or H3TPY) with metal clusters. These electron-rich groups possess strong electron-donating capabilities, enabling electron-donating interactions with SO2 molecules, thereby enhancing SO2 adsorption capacity and ensuring favorable desorption conditions. The different positions of the nitrogen-containing groups within the MOF structure significantly affect the SO2 adsorption performance of the material. The MOF material designed in this invention introduces different types of nitrogen-containing groups into its tridentate carboxylic acid organic ligands to adjust the spatial sites and electronic properties of the nitrogen groups, further optimizing the SO2 adsorption capacity. This not only achieves highly efficient SO2 adsorption and desorption but also lays the foundation for the subsequent development of environmental remediation materials.