58 results about "Catalyst nanoparticles" patented technology

The invention discloses a device and a method for preparing a single-walled carbon nanotube by a two-step method. The device comprises a carbon nanotube growth chamber, a product collection module, a catalyst supply module, a carbon source supply module and an etching agent supply module, the carbon source supply module is used for introducing a first airflow containing a carbon source in a first direction, the etching agent supply module is used for introducing a second airflow containing an etching agent in a second direction, and the first direction is opposite to the second direction so that the airflow intersects to form a vortex; the catalyst supply module introduces catalyst particles in a third direction, and the third direction points to the position near the vortex; and the product collecting module is arranged above the vortex and is used for collecting the formed single-walled carbon tubes. Controllable preparation of catalyst nanoparticles and ordered separation of carbon nanotube growth steps are realized, the influence of hybrid variables on the reaction is reduced, the vortex is formed by opposite intersection of airflow, and the problem of local deposition and blockage of tangential laminar flow is avoided by the vortex, so that the influence on the quality and continuous growth of the carbon nanotubes is avoided.

The invention discloses a bimetallic MOFs mediated morphology-controllable catalyst, a preparation method and application thereof, and the preparation method comprises the following steps: respectively adding an iron salt, a cobalt salt and an organic ligand into an organic solvent, and then adding an alkaline regulator and a surfactant; transferring the stirred solution into a reaction kettle to carry out solvothermal reaction, and centrifuging, washing and drying the suspension after the reaction to obtain a bimetal organic framework (MOFs) precursor; and carrying out heat treatment in a gas atmosphere to obtain the catalyst. The bimetallic MOFs are obtained through a one-step solvothermal method, the size and morphology of the product are regulated through the alkaline regulator, agglomeration of catalyst nanoparticles can be reduced by adding the surfactant, the preparation method is simple, the specific surface area of the product is high, and when the catalyst is used for preparing high-carbon hydrocarbon through catalytic hydrogenation of carbon dioxide, the yield of the product is high. The conversion rate of carbon dioxide reaches up to 47.82%, the selectivity of high-carbon hydrocarbon reaches 59.68%, the selectivity of by-products carbon monoxide and methane is low, and the catalytic activity is good.

The invention discloses an iridium oxide catalyst with a dendritic pore structure, a preparation method and application of the iridium oxide catalyst in a proton exchange membrane water electrolysis technology, and belongs to the technical field of water electrolysis. The preparation method comprises the following steps: dissolving an iridium source in water, adding a mixed template agent, dissolving, adding a pore-enlarging agent, and uniformly mixing to obtain a uniform emulsion; and adding an initiator for reaction, after the reaction is finished, centrifugally cleaning for 3-5 times by using a mixed solution of water and absolute ethyl alcohol in a volume ratio of 1: 1, washing off the template agent, and drying to obtain the iridium oxide catalyst with the dendritic pore structure. Compared with commercial iridium oxide catalyst nanoparticles, the iridium oxide catalyst with the dendritic pore structure prepared by the invention provides more active sites, and meanwhile, the mass transmission capability of the catalyst is remarkably improved due to the abundant pore structure, and the diffusion limitation existing in a non-porous material is overcome; therefore, the catalyst shows relatively high activity and stability in PEM electrolyzed water oxygen evolution reaction under low iridium loading, and efficient oxygen evolution catalytic reaction is realized.

The invention relates to an hcp phase ordered structure PtCu oxygen reduction catalyst and a preparation method thereof.The preparation method comprises the steps that carbon black and a Cu metal precursor are mixed, and a Cu / C precursor is obtained under the action of a reducing agent; pt and Cu / C are compounded through an impregnation method; the PtCu alloy loaded on the conductive carbon black is ordered through high-temperature gas reduction, and the loaded PtCu intermetallic compound catalyst is obtained. The catalyst nanoparticles prepared by the invention are uniformly distributed on the carbon carrier, the size of the nanoparticles is about 3-5nm, and the alloy structure is an intermetallic compound structure. The preparation process is simple, environment-friendly and suitable for large-scale batch production; the prepared catalyst has high oxygen reduction activity and stability, and can be directly applied to fuel cells.

The present invention discloses a method for catalytic hydrogenation refining of coking crude benzene, which belongs to the technical field of crude benzene hydrogenation refining, and comprises the following steps: preparing a catalyst carrier; preparing a catalyst impregnation liquid; preparing a catalytic hydrogenation catalyst; catalytic hydrogenation refining; and component separation. The present invention adopts high-temperature co-carbonization technology to combine rectorite with pollen to form a modified carbonized pollen with a multi-level pore structure, which significantly enhances the adsorption, thermal stability and catalytic performance. The hollow structure catalyst nanoparticles prepared by the Kirkendall effect not only increase the active sites, but also promote the internal diffusion of reactants and products, effectively improving the catalytic efficiency. At the same time, the chelation effect of the ionic liquid and the synergistic effect of the oxygen-containing functional group realize the effective loading of the catalyst carrier and the catalyst body, enhance the stability and service life of the catalyst, strengthen its catalytic and desulfurization performance, and provide a new way to achieve efficient and environmentally friendly chemical production.

The utility model belongs to chemical device technical field provides a kind of atomization collision flow type catalyst preparation device, including first raw material tank, second raw material tank, first reaction liquid buffer tank, second reaction liquid buffer tank, reaction tank, first air compressor and second air compressor;The first raw material tank is connected with the reaction tank by the first reaction liquid buffer tank, the second raw material tank is connected with the reaction tank by the second reaction liquid buffer tank, the first air compressor and the second air compressor are all connected to the bottom of the reaction tank;Device is dispersed to raw material by ultrasonic disperser, avoids the problem that reactant gathers and concentration is not uniform.Simultaneously the feeding mode of high-pressure spray makes two air flows to collide quickly, strengthens mixing process, is beneficial to the rapid nucleation of catalyst nanoparticle, reduces reunion phenomenon;Simultaneously reduce the attachment and aggregation of particle in pipeline, reduce the risk of pipeline blockage.

To provide a novel catalyst layer (CL) composition and a structure that provide excellent durability and sustained catalyst performance for contemplated large vehicle applications.SOLUTION: A CL composition and a structure include: an internal composition composed of binder-coated nanoparticles, binder-free catalyst nanoparticles, and regular electrical, ionic, gas, and liquid pathways; a multilayer structure with different packing densities between multiple sub-layers; and an external pattern of an outer surface of the CL. An improvement in CL durability and catalyst performance is achieved, and by using the CL of the present invention, a novel solid electrolytic plating process is demonstrated and a novel thin film coating catalyst product is obtained. The binder-coated nanoparticles function as interconnecting substrates or sites to which nanoparticles that are not coated on their binder-coated surface are adhesively attached, and achieve a regular structure in which the binder-free catalyst nanoparticles are consistently interspersed between the binder-coated nanoparticles and their aggregates.SELECTED DRAWING: Figure 2

The application relates to an iridium oxide catalyst with a dendritic pore structure, a preparation method and application thereof in proton exchange membrane water electrolysis technology, and belongs to the technical field of water electrolysis. An iridium source is dissolved in water, then a mixed template agent is added, a pore expanding agent is added after dissolution, and a uniform emulsion is obtained after mixing uniformly; an initiator is added to carry out reaction, after the reaction is completed, the mixed solution of water and anhydrous ethanol with a volume ratio of 1:1 is used for centrifugal cleaning for 3-5 times, the template agent is washed away, and the iridium oxide catalyst with the dendritic pore structure is obtained after drying. Compared with commercial iridium oxide catalyst nanoparticles, the prepared iridium oxide catalyst with the dendritic pore structure provides more active sites, meanwhile, the rich pore structure significantly improves the mass transfer capacity of the catalyst, diffusion limitation existing in the poreless material is overcome, therefore, in a low iridium load, the PEM water electrolysis oxygen evolution reaction exhibits higher activity and stability, and high-efficiency oxygen evolution catalytic reaction is realized.

The invention relates to a preparation method of a ruthenium-based acidic water electrolysis hydrogen production catalyst, and belongs to the technical field of clean renewable energy nanometer materials and catalysis. The method is characterized in that a carbon carrier and a metal compound are adopted as precursors, a polyol reduction method is adopted, carbon-loaded ruthenium-based alloy nanoparticles are obtained, and then the ruthenium-based catalyst is prepared through low-temperature pyrolysis under the air condition. The ruthenium-based catalyst nanoparticles are uniform in size, compared with a conventionally adopted hydrothermal method, the method is simple in step, controllable in morphology and uniform in size distribution, and meanwhile, the prepared material has high catalytic activity and stability and can be applied to cathode and anode catalyst materials of a proton exchange membrane water electrolysis device.

The invention belongs to the technical field of hydrogen production electrolytic cells, and particularly discloses an electrode catalyst for a hydrogen production electrolytic cell and a preparation method thereof, an electrode and an electrolytic cell, the electrode catalyst comprises first metal nanoparticles, the size of the first metal nanoparticles is smaller than or equal to 10 nm, the first metal nanoparticles form a first metal nanoparticle aggregation structure, and the first metal nanoparticles form a second metal nanoparticle aggregation structure; the size of the first nano-particle agglomerated structure is less than or equal to 65 nm; the second metal nanoparticles are distributed among the first metal nanoparticles and at least partially cover at least one part of the first metal nanoparticles, and the size of the second metal nanoparticles is smaller than or equal to 10 nm. The size of the electrode catalyst nano-particles can be controlled, agglomeration is limited, the crystallinity is reduced, and defect active sites are enriched.

Carbon nanofiber doped alumina (Al-CNF) supported MoCo catalysts in hydrodesulfurization (HDS), and / or boron doping, e.g., up to 5 wt % of total catalyst weight, can improve catalytic efficiency. Al-CNF-supported MoCo catalysts, (Al-CNF-MoCo), can reduce the sulfur concentration in fuel, esp. liquid fuel, to below the required limit in a 6 h reaction time. Thus, Al-CNF-MoCo has a higher catalytic activity than Al—MoCo, which may be explained by higher mesoporous surface area and better dispersion of MoCo metals on the AlCNF support relative to alumina support. The BET surface area of Al—MoCo may be 75% less than Al-CNF-MoCo, e.g., 166 vs. 200 m2 / g. SEM images indicate that the catalyst nanoparticles can be evenly distributed on the surface of the CNF. The surface area of the AlMoCoB 5% may be 206 m2 / g, which is higher than AlMoCoB 0% and AlMoCoB 2%, and AlMoCoB 5% has the highest HDS activity, removing more than 98% sulfur and below allowed levels.

The present invention discloses an apparatus and a method for preparing single-walled carbon nanotubes by a two-step process. The apparatus includes a carbon nanotube growth chamber, a product collection module, a catalyst supply module, a carbon source supply module, and an etchant supply module; the carbon source supply module is used to introduce a first gas stream containing a carbon source in a first direction, and the etchant supply module is used to introduce a second gas stream containing an etchant in a second direction, and the first direction and the second direction are opposite to each other so that the gas streams intersect to form a vortex; the catalyst supply module introduces catalyst particles in a third direction, and the third direction points to the vicinity of the position where the vortex is located; the product collection module is arranged above the vortex to collect the formed single-walled carbon tubes. The present invention realizes the controllable preparation of catalyst nanoparticles and the orderly separation of the carbon nanotube growth step, reduces the influence of confounding variables on the reaction, the counter-directional intersection of the gas streams forms a vortex, and the vortex avoids the problem of local deposition and blockage of the tangential laminar flow, thereby avoiding the influence on the quality and continuous growth of carbon nanotubes.

A high temperature fuel cell includes an anode, a cathode, a polymer electrolyte membrane disposed between the anode and the cathode, phosphoric acid, and a cathode catalyst disposed on the cathode and in contact with the phosphoric acid. The cathode catalyst includes a Pd-containing core or a Pt-containing core, a Pt-containing shell, in a compressed state, on the Pd-containing core, and an anti-phosphate poisoning surface modifier disposed on the Pt-containing shell.

Carbon nanofiber doped alumina (Al—CNF) supported MoCo catalysts in hydrodesulfurization (HDS), and / or boron doping, e.g., up to 5 wt % of total catalyst weight, can improve catalytic efficiency. Al—CNF-supported MoCo catalysts, (Al—CNF—MoCo), can reduce the sulfur concentration in fuel, esp. liquid fuel, to below the required limit in a 6 h reaction time. Thus, Al—CNF—MoCo has a higher catalytic activity than Al—MoCo, which may be explained by higher mesoporous surface area and better dispersion of MoCo metals on the AlCNF support relative to alumina support. The BET surface area of Al—MoCo may be 75% less than Al—CNF—MoCo, e.g., 166 vs. 200 m2 / g. SEM images indicate that the catalyst nanoparticles can be evenly distributed on the surface of the CNF. The surface area of the AlMoCoB 5% may be 206 m2 / g, which is higher than AlMoCoB 0% and AlMoCoB 2%, and AlMoCoB 5% has the highest HDS activity, removing more than 98% sulfur and below allowed levels.

Carbon nanofiber doped alumina (Al-CNF) supported MoCo catalysts in hydrodesulfurization (HDS), and / or boron doping, e.g., up to 5 wt % of total catalyst weight, can improve catalytic efficiency. Al-CNF-supported MoCo catalysts, (Al-CNF-MoCo), can reduce the sulfur concentration in fuel, esp. liquid fuel, to below the required limit in a 6 h reaction time. Thus, Al-CNF-MoCo has a higher catalytic activity than Al—MoCo, which may be explained by higher mesoporous surface area and better dispersion of MoCo metals on the AlCNF support relative to alumina support. The BET surface area of Al—MoCo may be 75% less than Al-CNF-MoCo, e.g., 166 vs. 200 m2 / g. SEM images indicate that the catalyst nanoparticles can be evenly distributed on the surface of the CNF. The surface area of the AlMoCoB5% may be 206 m2 / g, which is higher than AlMoCoB0% and AlMoCoB2%, and AlMoCoB5% has the highest HDS activity, removing more than 98% sulfur and below allowed levels.

The invention relates to the field of diameter and conductive property controlled growth of single-walled carbon nanotubes, in particular to a method for growing a sub-nano diameter semiconductor single-walled carbon nanotube in a crystal face step height confinement. According to the method, a crystal face (110) of a zirconium oxide single crystal substrate is screened, the atomic step height of the crystal face (110) of the zirconium oxide single crystal substrate is regulated and controlled through heat treatment, and the small-diameter catalyst nanoparticles are prepared through steps with the small crystal face height. By adopting a normal pressure chemical vapor deposition method, the controllable growth of the diameter and the conductive property of the single-walled carbon nanotube is realized by utilizing a confinement space provided by the step. By selecting the crystal face of the substrate and regulating and controlling the step height, based on the strong interaction between the single-walled carbon nanotube and the atomic step of the substrate, the controlled preparation of the semiconductor single-walled carbon nanotube with sub-nanometer diameter and narrow chiral distribution is realized, and a new candidate single crystal substrate is provided for the controlled growth of the single-walled carbon nanotube; and a material foundation is laid for the development of carbon nanotube-based nano-electronic devices.

The invention provides a modified catalyst and a preparation method thereof, a membrane electrode, a fuel cell and application, the modified catalyst comprises a catalyst matrix and a modified layer loaded on the outer surface of the catalyst matrix, the catalyst matrix is a Pt / C catalyst, and the structural formula of the material of the modified layer is SiO2-(CH2) 3SH. By adopting the modified catalyst provided by the invention, on one hand, when the modified catalyst is applied to a membrane electrode, the coverage of an ionomer on catalyst nanoparticles can be reduced, so that active sites of the catalyst are increased, and the catalytic performance is improved; and on the other hand, the local oxygen mass transfer resistance in the cathode catalyst layer can be greatly reduced, so that the cathode catalyst layer has better catalytic activity and mass transfer rate, and the comprehensive performance is better.

The invention provides a bio-based degradable foaming material and a preparation method thereof, and relates to the technical field of biodegradable materials. The invention aims to solve the problems that the existing PBAT / TPS foaming material is thick and large in foam hole, deteriorated in mechanical property, unstable in foaming process and the like due to poor interfacial compatibility and insufficient melt strength. According to the method, PBAT and TPS are used as matrixes, maleic anhydride grafted PBAT is added as a reactive compatibilizer, nanoparticles are added as a physical reinforcing and nucleating agent, and a chemical foaming agent AC and a catalyst ZnO are matched. The foaming material is prepared through a high-speed mixing and hot-pressing foaming one-step forming process. The composite material comprises the following raw materials in percentage by weight: 10-40% of TPS, 60-90% of PBAT, 1-5% of a foaming agent, 1-5% of a compatilizer, 0-3% of a catalyst and 0.5-5% of a nanoparticle nucleating agent. The prepared foaming material has high foaming ratio and good compression strength and rebound resilience, can be completely biodegraded, and is suitable for the fields of logistics packaging, electronic product protection and the like.

A method of manufacturing a catalyst membrane includes providing a membrane, generating an aerosol of catalyst nanoparticles by spark ablation, and directing the aerosol of catalyst nanoparticles towards a first side of the membrane such that the catalyst nanoparticles are deposited onto the membrane thereby forming the catalyst membrane. A catalyst membrane includes a membrane and catalyst nanoparticles attached directly to the membrane in a binder-free manner.

The present invention provides a hydrogen energy electrode and a preparation process thereof, wherein the preparation process includes: cleaning and pre-treating the selected base material according to the electrode processing requirements to remove impurities and pollutants on the surface of the base material; selecting the catalyst material according to the electrode processing requirements and preparing catalyst nanoparticles by chemical reduction or electrochemical deposition; uniformly coating the prepared catalyst nanoparticles on the base material to form a catalyst layer on the surface of the base material to obtain an electrode pre-processed body; covering the electrode pre-processed body with a proton exchange membrane coated with the catalyst layer to form an electrode pre-finished product; and post-treating the electrode pre-finished product to obtain a hydrogen energy electrode. The overall preparation process of the present invention is simple, easy to operate, and low in cost. The performance of the prepared electrode is more stable, and the bonding force between the proton exchange membrane and the catalyst layer is strong, which effectively improves the efficiency and service life of the battery.

The invention discloses a low-cost silicon nanowire material and a preparation method thereof, and belongs to the technical field of secondary resource utilization. The preparation method comprises the following steps: pre-treating a waste photovoltaic silicon plate to obtain a high-purity silicon wafer; putting the high-purity silicon wafer into a first deposition solution, and depositing Ag catalyst nanoparticles on the surface of the high-purity silicon wafer; washing the high-purity silicon wafer with the Ag catalyst nanoparticles deposited on the surface; putting the high-purity silicon wafer into a second deposition solution, and depositing a Cu layer on the Ag catalyst nanoparticles; and putting the high-purity silicon wafer into the etching solution to etch the high-purity silicon wafer to obtain the silicon nanowire material. According to the invention, the etching rate can be improved, the silicon nanowire material obtained by etching is ensured to have good morphology uniformity and quality, and the preparation cost is effectively reduced.

Improved photocatalysis is provided for chemical reactions involving hydrogen in two component plasmon-catalyst nanoparticles. The main idea of this work is to configure the optical illumination of the nano-articles to suppress formation of an undesirable hydride phase in the nanoparticles. This idea is broadly applicable to any chemical reaction involving hydrogen. Specific examples considered experimentally in this work are acetylene hydrogenation to produce ethylene, carbon dioxide reduction and ammonia synthesis.

Carbon nanofiber doped alumina (Al—CNF) supported MoCo catalysts in hydrodesulfurization (HDS), and / or boron doping, e.g., up to 5 wt % of total catalyst weight, can improve catalytic efficiency. Al—CNF-supported MoCo catalysts, (Al—CNF—MoCo), can reduce the sulfur concentration in fuel, esp. liquid fuel, to below the required limit in a 6 h reaction time. Thus, Al—CNF—MoCo has a higher catalytic activity than Al—MoCo, which may be explained by higher mesoporous surface area and better dispersion of MoCo metals on the AlCNF support relative to alumina support. The BET surface area of Al—MoCo may be 75% less than Al—CNF—MoCo, e.g., 166 vs. 200 m2 / g. SEM images indicate that the catalyst nanoparticles can be evenly distributed on the surface of the CNF. The surface area of the AlMoCoB5% may be 206 m2 / g, which is higher than AlMoCoB0% and AlMoCoB2%, and AlMoCoB5% has the highest HDS activity, removing more than 98% sulfur and below allowed levels.

Provided herein are methods that involve the use of nanobubbles for fabrication of porous thin films that can be used to form articles such as electrodes, membranes, and photovoltaic cells. One such method includes combining nanobubbles with catalyst nanoparticles, a liquid carrier, and an ionomer to form a coating composition; applying the coating composition to a substrate to form a coated substrate; and removing the liquid carrier from the coated substrate to form an electrode including a porous thin film on the substrate.

Lithium-sulfur battery cathodes including one or more porous carbon layers of rigid porous carbon agglomerates of predetermined average particle diameter. The rigid porous carbon agglomerates may include catalyst nanoparticles. The catalyst nanoparticles anchor lithium-polysulfide intermediates at the cathode and mitigate loss of sulfur from the cathode. The rigid porous carbon agglomerates provide for dense packing of carbons at the cathode with a cathode loading of at least 7 mg / cm2 based on the total weight of carbonaceous materials, sulfur, binder, and other materials that are typically loaded on a cathode substrate.

Carbon nanofiber doped alumina (Al-CNF) supported MoCo catalysts in hydrodesulfurization (HDS), and / or boron doping, e.g., up to 5 wt % of total catalyst weight, can improve catalytic efficiency. Al-CNF-supported MoCo catalysts, (Al-CNF-MoCo), can reduce the sulfur concentration in fuel, esp. liquid fuel, to below the required limit in a 6 h reaction time. Thus, Al-CNF-MoCo has a higher catalytic activity than Al—MoCo, which may be explained by higher mesoporous surface area and better dispersion of MoCo metals on the AlCNF support relative to alumina support. The BET surface area of Al—MoCo may be 75% less than Al-CNF-MoCo, e.g., 166 vs. 200 m2 / g. SEM images indicate that the catalyst nanoparticles can be evenly distributed on the surface of the CNF. The surface area of the AlMoCoB5% may be 206 m2 / g, which is higher than AlMoCoB0% and AlMoCoB2%, and AlMoCoB5% has the highest HDS activity, removing more than 98% sulfur and below allowed levels.

A method for producing an ion conducting membrane comprising a membrane layer comprising a reconstitution catalyst. The film layer is made from an ink comprising a stabilized dispersion of reconstitution catalyst nanoparticles. Also provided are ion conducting membranes for electrochemical devices, such as fuel cells or water electrolysers, having a membrane layer comprising a reconstitution catalyst, the membrane layer comprising dispersed reconstitution catalyst nanoparticles, a nanoparticle stabilizer, and an ion conducting polymer.

Carbon nanofiber doped alumina (Al-CNF) supported MoCo catalysts in hydrodesulfurization (HDS), and / or boron doping, e.g., up to 5 wt % of total catalyst weight, can improve catalytic efficiency. Al-CNF-supported MoCo catalysts, (Al-CNF-MoCo), can reduce the sulfur concentration in fuel, esp. liquid fuel, to below the required limit in a 6 h reaction time. Thus, Al-CNF-MoCo has a higher catalytic activity than Al—MoCo, which may be explained by higher mesoporous surface area and better dispersion of MoCo metals on the AlCNF support relative to alumina support. The BET surface area of Al—MoCo may be 75% less than Al-CNF-MoCo, e.g., 166 vs. 200 m2 / g. SEM images indicate that the catalyst nanoparticles can be evenly distributed on the surface of the CNF. The surface area of the AlMoCoB5% may be 206 m2 / g, which is higher than AlMoCoB0% and AlMoCoB2%, and AlMoCoB5% has the highest HDS activity, removing more than 98% sulfur and below allowed levels.

The invention discloses a coking crude benzene catalytic hydrofining method, which belongs to the technical field of crude benzene hydrofining, and comprises the following steps: preparing a catalyst carrier; preparing a catalyst impregnation liquid; preparing a catalytic hydrogenation catalyst; performing catalytic hydrofining; and separating the components. The rectorite and the pollen are combined by adopting a high-temperature co-carbonization technology to form the modified carbonized pollen with a hierarchical porous structure, so that the adsorbability, the thermal stability and the catalytic performance are remarkably enhanced. According to the hollow-structure catalyst nanoparticles prepared through the Kirkendall effect, active sites are increased, internal diffusion of reactants and products is promoted, and the catalytic efficiency is effectively improved. Meanwhile, the chelation of the ionic liquid and the synergistic effect of the oxygen-containing functional group realize the effective load of the catalyst carrier and the catalyst body, enhance the stability and service life of the catalyst, enhance the catalysis and desulfurization performance of the catalyst, and provide a new way for realizing efficient and environment-friendly chemical production.

The invention relates to the technical field of biochemistry, in particular to nano-enzyme for regulating and controlling neurotransmitters, an inhalation type preparation and application. The nanoenzyme includes catalyst nanoparticles that can catalyze the production of neurotransmitters and functionalized biomacromolecules that can enhance nasal-brain delivery. The inhaled preparation comprises a dispersion system of the nano-enzyme, and the dispersion system comprises the nano-enzyme and a dispersion medium. Experimental results of administration of the nano-enzyme inhalation type preparation to animals through an inhalation way show that the nano-enzyme inhalation type preparation can enter the brain through olfactory nerve and trigeminal nerve pathways to catalyze generation of neurotransmitters in situ in brain neurons. Compared with an existing product capable of regulating and controlling the content of the neurotransmitter, the nano-enzyme inhalation type preparation has the advantages in the aspects of controllability of the content of the neurotransmitter and continuous action time.