57 results about "Electron interaction" patented technology

The invention discloses an irradiation-reinforced SiC super-junction MOS (Metal Oxide Semiconductor) structure and a preparation process thereof, and belongs to the technical field of MOS semiconductors. Comprising a drain electrode, a semiconductor epitaxial layer, a source electrode and a grid electrode; the semiconductor epitaxial layer comprises an N substrate layer, an N drift layer, a P + layer, an N well layer and a P well layer; by arranging the lightly doped N layer in the middle of the N drift layer and arranging the laterally symmetrical trapezoidal P-layers on the two sides of the N drift layer, the device can interact with electrons in the N drift layer, accelerate carrier recombination, reduce the influence of redundant carriers on the performance of the device, effectively reduce the performance degradation caused by irradiation, and improve the performance of the device. According to the invention, the concave heavily-doped N layer is formed at the bottom end of the lightly-doped N layer, so that the carrier concentration of the region can be greatly improved, and the conductivity is remarkably enhanced.

According to the method, phosphomolybdic acid, copper chloride and ferric chloride serve as precursors, copper and iron-containing phosphomolybdic acid nano-enzyme (Cu, Fe-PMs) with peroxidase-like activity is synthesized through a microwave method, under the acidic condition, on one hand, the surface of Cu and Fe-PMs carries negative charges, high affinity is generated between Cu and Fe-PMs and a substrate TMB with positive charges, and on the other hand, the surface of Cu and Fe-PMs has negative charges; on the other hand, Cu / Fe / Mo three-metal redox couple accelerates the regeneration of Fe < 2 + > and plays an important role in the activity of peroxidase, and meanwhile, due to the introduction of sodium dehydroacetate, Cu and Fe in Cu and Fe-PMs and pyranoid ring and keto O in sodium dehydroacetate interact through coordinate bonds to cause electron interaction, so that the peroxidase-like activity of Cu and Fe-PMs is enhanced, and the peroxidase-like activity of Cu and Fe-PMs is improved. And the Fenton reaction is enhanced through transfer of electrons among the sodium dehydroacetate, the Cu and the Fe-PMs. When Cu and Fe-PMs oxidize TMB and H2O2, sodium dehydroacetate enhances the absorbance of the system, and on the basis, a novel colorimetric rapid detection method of sodium dehydroacetate is established.

The invention discloses a catalyst for preparing gamma-butyrolactone through liquid phase dehydrogenation of 1, 4-butanediol as well as a preparation method and application of the catalyst. Belongs to the technical field of catalyst preparation. The catalyst is composed of a carrier, CuO and MOx, the CuO and the MOx are loaded on the carrier, Cu accounts for 10-50% of the total mass of the catalyst, M accounts for 1-25% of the total mass of the catalyst, M is one of Mn, Zn, Co, Ni, Fe, Cr, Ce, Nb, Ru, Pt, Ir and Pd, and the carrier is one of silicon oxide, aluminum oxide, magnesium oxide, lanthanum oxide, hydroxyapatite and magnesium-aluminum hydrotalcite. An oxide-oxide interface is formed between CuO and MOx through roasting and reduction, and relatively strong electron interaction exists between highly dispersed Cu nanoparticles and the oxide-oxide interface, so that the stability of the catalyst can be enhanced.

The invention provides an Au nanocluster-Cu monatomic / titanium dioxide photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalysis. According to the invention, the Cu monatomic atom is used as a catalyst for hydrogen evolution reaction, the Cu monatomic atom and the Au nano-cluster are loaded at the same time, the Cu monatomic atom can be used as an electron transport bridge to regulate the electronic structure of the Au nano-cluster, the synergistic effect of the Cu monatomic atom and the Au nano-cluster is realized, the catalytic activity is regulated and controlled together, and efficient series connection of multi-step reaction is realized; therefore, the product selectivity can be accurately regulated and controlled; the catalytic oxidation reaction can be dynamically adjusted through carrier mediation or direct contact by virtue of the electron interaction between the Cu monatomic and the Au nano-cluster, so that the electron distribution in the catalytic process is favorably optimized, the reaction energy barrier of C-C bond breakage and hydroxymethyl oxidation is regulated and controlled, and the dynamic performance of generating GA and hydrogen through photocatalytic oxidation of EG is improved.

The invention provides a titanium-based catalyst, a preparation method of the titanium-based catalyst and a synthesis method of pyroxasulfone. The titanium-based catalyst comprises a main active component and an auxiliary metal component M doped in the main active component, wherein the main active component is a titanium dioxide nanobelt, the titanium dioxide nanobelt forms an oxygen vacancy defect, and the concentration of the oxygen vacancy defect is 5-20 [mu] mol / g; the auxiliary metal component M comprises at least one of Re, Ru, Mo, V, Ce, Zn and Cr. The titanium-based catalyst is filled in a fixed bed and is used in a reaction for synthesizing pyroxasulfone through thioether oxidation, and oxygen vacancy defect sites not only can enhance adsorption and activation of reactants so as to improve reaction kinetics in the oxidation process, but also can generate electron interaction with auxiliary metal ions so as to improve the catalytic activity of pyroxasulfone. The dispersity and the stability of the auxiliary agent metal component M on the titanium dioxide nanobelt are improved, so that more reaction active sites are provided, and continuous synthesis of pyroxasulfone is realized.

The invention discloses a preparation method of a functionalized carbon nanotube immobilized cobalt molecule complex and research on electrocatalytic CO2 reduction of the functionalized carbon nanotube immobilized cobalt molecule complex. The invention provides a dual combination strategy, specifically, a composite catalyst is prepared through an in-situ mixing process by taking a functionalized multi-walled carbon nanotube (MWCNT) as a conductive carrier and taking a peripheral modified cobalt tetrabipyridine molecular complex (Coqpy) as a catalytic active component. A carbon nanotube functional group is used as a first coordination ball to realize axial coordination bonding with a Co center, so that more electrochemical active cobalt complexes are allowed to be loaded, and interface electron transfer is accelerated. The pi-pi coupling effect of the peripheral conjugated group of Coqpy and MWCNT further strengthens the interaction and stability of electrons in the complex, and the CO Faraday efficiency and conversion frequency are respectively as high as 97.5% and 79s <-1 >. According to the composite electrode designed by the invention, the catalytic activity and stability of the catalyst are greatly improved, the process is simple, the method is novel, and the method is expected to become a universal and convenient method for preparing the heterogeneous molecular electrocatalyst.

The invention discloses a rare-earth-based bionic nano material as well as a preparation method and application thereof, and relates to the field of microbial pollution and anti-corrosion treatment. According to the invention, the active center of lactonase can be simulated by using a zinc-based material, and ester bonds in N-acyl homoserine lactone (AHL) molecules can be hydrolyzed by using the lactonase so as to block bacterial quorum sensing (QS) among bacterial florae, so that the antibacterial effect is achieved. Meanwhile, the outer layer of zinc is provided with a cerium element as a shell, so that on one hand, permeation of oxygen, moisture and corrosive ions can be prevented; on the other hand, the structure has hydrophobicity, and corrosion of moisture and salt ions to a metal matrix is further reduced through the hydrophobicity. Cerium and an oxide thereof have certain antibacterial ability and can have a synergistic effect with zinc, Ce can promote generation of Zn-N and generate strong electron interaction, better hydrophobicity is shown, and attachment and growth of microorganisms on the metal surface can be further inhibited.

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 present invention discloses an irradiation-hardened SiC superjunction MOS structure and a preparation process thereof, belonging to the field of MOS semiconductor technology. The structure comprises a plurality of mutually parallel MOS cells, wherein a single MOS cell comprises a drain, a semiconductor epitaxial layer, a source, and a gate. The semiconductor epitaxial layer comprises an N substrate layer, an N drift layer, a P+ layer, an N well layer, and a P well layer. The present invention provides a lightly doped N layer in the middle of the N drift layer and laterally symmetrical trapezoidal P- layers on both sides of the N drift layer. These layers can interact with electrons in the N drift layer, accelerate carrier recombination, reduce the impact of excess carriers on device performance, effectively reduce performance degradation caused by irradiation, and improve the reliability and stability of the device in an irradiated environment. The present invention forms a concave heavily doped N layer at the bottom end of the lightly doped N layer, thereby significantly increasing the carrier concentration in this region and significantly enhancing the conductive performance.

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 relates to a monatomic cobalt-loaded tungsten disulfide nanosheet catalyst and application thereof, and the monatomic cobalt-loaded tungsten disulfide nanosheet catalyst is prepared by the following method: carrying out solvothermal reaction on a sulfur-containing precursor and tungsten salt to prepare a WS2 nanosheet; putting the WS2 nanosheet into a ball mill, fully grinding, adding cobalt salt into the ball mill, and continuously grinding to obtain a black solid; and putting the black solid into a magnetic boat, introducing mixed gas, and carrying out heat treatment at 100-800 DEG C for 1-8 h to obtain the cobalt-loaded tungsten disulfide catalyst. The tungsten disulfide nanosheet is subjected to surface modification by utilizing a solid-phase ball milling method, cobalt monatomic is introduced to tungsten disulfide, and the catalytic activity of the monatomic cobalt-loaded tungsten disulfide nanosheet catalyst is improved by utilizing strong electron interaction between metal and a carrier.

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 catalysts, and discloses an organic-inorganic hybrid catalyst as well as a preparation method and application thereof. The catalyst carrier is composed of g-C3N4 and CuZnAl-LDH (layered double hydroxide), the active component is Pd. The active component of the catalyst is the active metal Pd with a nano structure, so that the loading capacity of the metal can be reduced, high catalytic activity is realized, and the cost of raw materials is greatly saved. A carrier of the catalyst is an organic-inorganic composite carrier and has electron vacancies, so that strong electron interaction between the carrier and active metal species is ensured. Under the action of the catalyst, the dimethyl succinate is subjected to high-selectivity hydrogenation, so that the generation of byproducts is reduced. The catalyst is simple and convenient in preparation process and low in cost, and has relatively high atom economic benefits.

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 an atomic-scale dispersion transition metal M-based catalyst as well as a preparation method and application thereof, and belongs to the field of chemical engineering. According to the invention, LDHs is used as an innovative platform, and rich oxygen vacancies which are uniformly distributed are formed through topological transformation in a high-temperature reducing atmosphere, so that M nano-particles formed in a sol fixing process can be promoted to be re-dispersed and anchored in situ, thereby obtaining the M1-YOx-MgAlO catalyst. The active metal M of the catalyst is dispersed in an atomic scale and is anchored by an oxygen vacancy adjacent to an unsaturated coordination Y atom, so that electron interaction between M and Y is initiated, and an electron-deficient and stable M1 delta < + >-YOx synergistic active center is formed. The prepared atomic-scale dispersion transition metal M-based catalyst can be used in a selective hydrogenation reaction, shows excellent hydrogenation activity and selectivity, has outstanding catalytic performance, is easy to recover and reuse, and has good stability.

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.

The invention relates to a supported low-temperature ammoxidation reaction catalyst, a preparation method and application, the catalyst is composed of an active component and a carrier, the active component is precious metal Pt, and the carrier is W-XC72; xC72 and tungsten chloride are mixed and hydrolyzed to generate W-XC72, sodium borohydride is used as a reducing agent, a precursor of Pt is reduced under intense stirring at room temperature, and the Pt / W-XC72 catalyst is synthesized. The prepared catalyst carrier has a large specific surface area, metal particles on the surface of the catalyst carrier are evenly distributed, the active metal and the carrier have strong electron interaction, the surface and interface properties between the active metal and the carrier are changed by regulating and controlling the electronic structure of the active metal, the adsorption energy of reaction intermediates is optimized, and the catalytic activity of the catalyst is improved. Therefore, the activity of the catalyst in ammoxidation reaction is effectively improved. The catalyst has a wide prospect in low-temperature ammonia fuel cells.

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 present invention discloses a metal framework luminescence based on lone electron-π interaction and its circularly polarized luminescent crystal material. The metal framework provided by the present invention is prepared by co-assembly with metal ions as shown in Formula I and Formula II or Formula I and Formula III; further, the metal framework and non-chiral molecules or chiral molecules containing lone electrons prepare fluorescent and circularly polarized luminescent materials through host-guest interaction. The present invention first achieves effective fluorescence emission by encapsulating non-chiral guest molecules through the metal framework; and achieves circularly polarized luminescence by encapsulating chiral guest molecules rich in lone electrons. The present invention not only proves that lone electron-π interaction can effectively achieve metal framework fluorescence emission and chirality induction, but also provides a universal method for the development of optical and chiral optical crystal materials.

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.