29 results about "Heat deposition" patented technology

The invention belongs to the technical field of catalysts, and relates to a surface-reconstructed heterojunction catalyst and a preparation method and application thereof. The preparation method comprises the following steps: dissolving cobalt salt, ferric salt and praseodymium salt in deionized water, heating and spraying on a carrier to prepare praseodymium-doped ferrocobalt layered double hydroxide; mixing the praseodymium-doped ferrocobalt layered double hydroxide with a phosphorus source, and calcining in an inert atmosphere to prepare praseodymium-doped CoP / Fe2P; and carrying out electrooxidation treatment on the praseodymium doped CoP / Fe2P, so as to prepare the Pr6O11 cluster modified CoFeOOH heterojunction catalyst. Through cooperation of three technologies of spray thermal deposition, phosphating and electrooxidation, stable construction and electrochemical activation of a heterogeneous interface are realized, the corrosion resistance and chlorine evolution resistance competitive capacity of the catalyst in a chlorine-containing alkaline system are remarkably improved, the current density of 100 mA. Cm <-2 > can be achieved only through 223 mV overpotential, and meanwhile, stable operation is performed for 500 h.

Silicon-carbon composites obtainable by a process comprising the following steps: Step 1: Provision of one or more porous carbon particles, wherein the porous carbon particles (i) covalent organic framework compounds (COFs) are, (ii) a mean electrical particle resistance of at least 0.5 MΩ, (iii) a reversible delthiation capacity β of not more than 100 mAh / g and (iv) exhibit a mass loss of no more than 10 wt.% up to 380°C, Step 2: Thermal deposition of silicon from one or more gaseous silicon precursor(s) in the pores and / or on the surface of the porous carbon particles and, if applicable, Step 3: Deposition of additional carbon in the pores and / or on the outer surface of the silicon-carbon composites if the silicon-carbon composites after Step 2 have a specific surface area above 50 m²2 / g, wherein the silicon-carbon composites after step 2 and, if applicable, step 3 a) a specific surface area of ​​at most 50 m² 2 / g and b) have an average electrical particle resistance of at least 0.5 MΩ. Furthermore, a method for producing the silicon-carbon composites according to the invention, their use as active materials in anodes for lithium-ion batteries, anodes containing these silicon-carbon composites, and lithium-ion batteries comprising anodes containing these silicon-carbon composites are the subject of the present invention.

The present application provides a magnetic layer having a coercive force Hc of 2.00 kOe or more and a residual magnetization Mrt per unit area of 2.00 memu / cm2 or more, which is achieved without using a non-magnetic underlayer for promoting in-plane orientation of the magnetic layer and without performing heat deposition 2 The above in-plane magnetization film, in-plane magnetization film multilayer structure, hard bias layer, magnetoresistance effect element, and sputtering target. The in-plane magnetization film has: a preliminary magnetic layer (12A) containing Co, Pt, and a non-magnetic grain boundary material and having a thickness of 1 to 32 nm; and a magnetic layer main portion (12B) formed on the preliminary magnetic layer (12A) and containing Co, Pt, and a non-magnetic oxide, the above non-magnetic grain boundary material of the preliminary magnetic layer (12A) containing at least one of a Zn oxide and a Ta oxide.

The application relates to the field of heat dissipation, in particular to an anti-blocking water circulation radiator, which comprises a radiator body, a filter screen structure, a temperature sensor array and other components arranged in the body, the radiator body is provided with a hot water outlet and a cold water outlet, a specific control method is adopted to perform heat dissipation, data is collected through the temperature sensor array, a model is established to calculate heat dissipation efficiency, and a phase change material heat storage module, a fault tolerance mechanism and the like are further arranged. The application achieves the technical effects that heat dissipation conditions of the radiator can be monitored and regulated in real time, blocking can be effectively prevented, working parameters of a micro-channel pump group can be dynamically adjusted according to a heat deposition accumulation trend, heat can be temporarily stored and directionally forced to dissipate when local temperature rises too fast, the radiator simultaneously has a fault tolerance capability, and stable operation of the radiator is guaranteed.

The present invention relates to an anode heat exchange structure of a magnetic plasma thruster and a magnetic plasma thruster, belonging to the field of electric propulsion thruster design. The anode heat exchange structure of the magnetic plasma thruster includes a heat pipe and a radiation plate; the heat pipe is fixed on the anode body of the magnetic plasma thruster and contacts the anode body, and the length direction of the heat pipe is in the same direction as the central axis direction of the anode body; the radiation plate is fixedly arranged at the condensation end of the heat pipe. The heat deposition on the inner surface of the discharge chamber caused by plasma bombardment is transferred to the rear lightweight radiation plate through the heat pipe to dissipate heat to the environment, and improve the uniformity of the thruster anode temperature distribution. The radiation heat exchange structure takes away a large amount of heat deposited by the anode, prevents the anode from overheating and failure, and at the same time increases the working life, thrust and efficiency of the magnetic plasma thruster.

This invention belongs to the field of water electrolysis application technology, and relates to a high-entropy hydroxy oxide for water electrolysis and its preparation method. It can be used in the field of alkaline water electrolysis and has a significant catalytic effect on hydrogen production from alkaline water electrolysis, greatly reducing the cost of electrode preparation. It is prepared by hydrothermal deposition coupled with electrochemical reconstruction to obtain a watermelon seed-shaped co-hydroxy oxide of Fe, Co, Ni, Cu and Mo with a thickness of 0.3-1.0 μm. The specific steps of the hydrothermal deposition coupled with electrochemical reconstruction preparation method are as follows: Step (1): A certain amount of iron salt, cobalt salt, nickel salt, copper salt and citric acid are added to a mixed solution of water and ethanol. Under stirring, an aqueous solution of molybdate is added, and a molybdenum-based composite oxide is obtained by hydrothermal deposition. Step (2): The molybdenum-based composite oxide obtained in step (1) is subjected to electrochemical treatment. The molybdenum-based composite oxide is electrochemically reconstructed into a high-entropy hydroxy oxide, named FeCoNiCuMoOOH.

The application discloses a method for measuring reverse positive ion current of a high-power negative ion source, and relates to the field of high-current ion source diagnosis.The method comprises the following steps: obtaining the cooling water flow and the temperature of the cooling water on each component of the high-power negative ion source; designing and manufacturing a specific back plate for measuring the profile of the reverse positive ion current; measuring the real-time temperature rise value and the flow of the cooling water on the ion source component, and analyzing the heat deposition on each component; measuring the temperature rise value and the flow of the cooling water on each component under the condition of beam extraction, analyzing the heat deposition on each component, comparing and analyzing the power deposition change on the component bombarded by the reverse positive ion current with and without beam extraction, and obtaining the reverse positive ion current power under the operation parameter; and changing the operation parameter of the negative ion source alone, repeating the experiment, and obtaining the influence law of the parameter on the reverse positive ion current.The application provides a basis for the design and optimization of the back plate of the ion source expansion chamber and the back plate of the Faraday shield and the safe and stable operation of the high-power negative ion source.

Disclosed herein are system, apparatus, article of manufacture, method and / or computer program product embodiments, and / or combinations and sub-combinations thereof, for stimulating convective thermal recharge in a hot sedimentary aquifer (HSA) used in geothermal energy generation applications. Such convective heat transfer stimulates a convective flow field within the HSA having a convective heat transfer rate sufficient to provide a convective thermal recharge of the extracted heat, where a closed-loop geothermal energy system such as a pipe-inpipe or underground loop system may extract heat from a heat exchange fluid heated by hot fluid in the HSA.

The invention provides CVD (Chemical Vapor Deposition) coating reaction heating deposition equipment which comprises a sectional heating furnace, a reaction deposition chamber arranged in the sectional heating furnace and a rotary air supply mechanism penetrating into the reaction deposition chamber, and a plurality of layers of workpiece carriers and a preheating chamber positioned at the bottom of the workpiece carriers are arranged in the reaction deposition chamber; the rotary air supply mechanism comprises a rotary air supply shaft which axially penetrates into the reaction deposition chamber and is in running fit with the reaction deposition chamber, an air supply pipe which axially penetrates through the workpiece carrier and is in running fit with the workpiece carrier, and a rotary driving part which is connected with the rotary air supply shaft and is used for driving the rotary air supply shaft to rotate; and the rotary air supply shaft is communicated with the air supply pipe through the preheating chamber. The deposition gas is conveyed to the reaction deposition chamber, the rotary gas supply system drives the gas supply pipe to rotate to uniformly inject the deposition gas into the deposition cavity, uniform and stable deposition gas is provided for a to-be-coated workpiece placed in the reaction deposition chamber, and the deposition effect is improved; and the temperature uniformity of the whole deposition chamber is ensured by heating the furnace body in sections and controlling and adjusting the temperature in sections.

The invention relates to the technical field of boron neutron capture therapy, in particular to a lithium target device for boron neutron capture therapy and a heat exchange and dissipation method, the lithium target device comprises a V-shaped substrate, an internal water cooling flow channel and a cover plate, the cover plate is arranged on one side of the V-shaped substrate, and the internal water cooling flow channel is arranged between the V-shaped substrate and the cover plate; the V-shaped substrate is made of a material with high heat-conducting property, is V-shaped, and forms an included angle with the bombardment direction of a proton beam, so that the distribution of thermal deposition on a target surface can be effectively controlled, the influence of proton scattering can be reduced, and the target efficiency is improved to the greatest extent; when a proton beam led out by an accelerator bombards a target surface, cooling water is uniformly input into the internal water-cooling flow channel arranged between the V-shaped substrate and the cover plate, and the cooling water is divided and flows in the internal water-cooling flow channel, so that the optimal fin efficiency is achieved, and the optimal heat exchange performance of a target system is realized.

The invention discloses a method and equipment for semi-continuously producing silicon-carbon composite materials in a fluidized bed reactor through a chemical vapor deposition or thermal deposition process. The produced silicon-carbon composite material has a structure in which silicon particles are uniformly dispersed, bonded and embedded into a carbon conductive matrix and form a secondary structure. The produced silicon-carbon composite material can be used as an advanced anode material for lithium batteries and other electrochemical energy storage devices.

The invention discloses a high-heat-flow deposition component of a high-power ion source discharge cavity, which belongs to the technical field of thermal management of a neutral beam injection system of a nuclear fusion device and comprises a thermal deposition component upper plate, a thermal deposition component middle plate and a thermal deposition component lower plate which are sequentially arranged from top to bottom, grooves are formed in the upper and lower surfaces of the thermal deposition part middle plate; the thermal deposition part middle plate and the thermal deposition part upper plate are welded into a whole to form a cooling water channel; the thermal deposition component middle plate and the thermal deposition component lower plate are welded into a whole to form an air inlet channel; the air inlet channels are integrated on the two sides of the thermal deposition face of the high-heat-flow deposition component. After integral welding, an anti-electrode-pollution labyrinth structure is machined on the upper surface of the high-heat-flow deposition component, and a trapezoidal groove is formed in the outer side of the anti-electrode-pollution labyrinth structure; a magnet mounting groove is milled in the bottom of the high-heat-flow deposition component. The method solves the problems of high heat load, material thermal stress concentration and non-uniform heat dissipation of a thermal deposition part caused by upgrading and reconstruction of an ion source plan.

The application discloses a laser inertial fusion cladding and a design method thereof. The cladding is divided into a tungsten armor, a first wall, a tritium breeding self-cooling area and a back plate from near to far according to the distance from the fusion reaction center. The design method firstly establishes a simplified radial partition three-dimensional model of the cladding, then performs neutron transport calculation on the model to obtain the tritium breeding rate and the nuclear heat deposition spatial distribution of the cladding, combines material characteristics to perform thermal calculation and obtain the temperature distribution in the cladding, comprehensively considers the tritium breeding rate and the temperature distribution, adopts an optimization algorithm to determine the reasonable interval of the radial size of each functional area of the cladding, then performs fine modeling, and optimizes the design in the interval until the standard is met. The fusion cladding and the design method thereof can replace the complete cladding model in the traditional cladding engineering design with the spherical radial partition model on the basis of ensuring the accuracy, avoid the establishment of a complex model in the multi-physical field coupling calculation, optimize the design process of the cladding, and design the cladding suitable for the laser inertial confinement fusion.

The application discloses a preparation method of a phosphorus-doped silicon-based composite negative electrode material, which comprises the following steps: (1) mixing phosphorus source gas, carbon source gas and silicon source gas under an inert atmosphere at room temperature to obtain mixed gas; in the mixed gas, the volume percentage of the phosphorus source gas is 0.1-3.0%, the volume percentage of the carbon source gas is 15-28%, and the balance is the silicon source gas; (2) introducing the mixed gas into a deposition furnace in which a base material is placed, and obtaining an intermediate product after heat deposition; and (3) performing carbon coating treatment on the intermediate product, and obtaining the phosphorus-doped silicon-based composite negative electrode material after post-treatment. The application discloses the preparation method of the phosphorus-doped silicon-based composite negative electrode material, and the lithium ion battery assembled by using the prepared negative electrode material has excellent cycle stability, high reversible specific capacity and high initial coulomb efficiency.

The invention discloses an ion selective groundwater remediation system and method based on a composite adsorption material, the system comprises an in-situ PRB module, an ex-situ packed bed module and a regulating reservoir, the in-situ PRB module and the ex-situ packed bed module are both internally provided with the composite adsorption material; the composite adsorption material is composed of, by mass, 60-80% of a biochar matrix, 10-20% of a nanometer iron oxide load layer and 10-20% of a modified zeolite coating, the preparation method of the composite adsorption material comprises the steps of pyrolysis, hydrothermal deposition and surface modification, the system adopts an acid pickling-organic solvent elution-thermal regeneration combined process as a regeneration process, and the composite adsorption material is prepared through the following steps: preparing the composite adsorption material; the material cost is reduced by 40%, the adsorption capacity is improved by 3-5 times, the adsorption effect is greatly improved through twice treatment, heavy metal / organic pollution synchronous removal is achieved through the component synergistic effect, the recovery process is simplified through the magnetic separation technology, and the operation and maintenance cost is reduced.

The present disclosure relates to a device (100) for removal of contaminants from water, the device (100) includes a substrate (102), a metal layer (104) is deposited on the substrate (102) to form a conducting electrode. A thick layer of aluminium (Al) (106) is thermally deposited on the metal layer (104). The aluminum layer (106) is anodized so as to form an anodized porous alumina layer (108) having nanopores. The device, upon application of potential, allows the flow of water through the micropores to perform absorption of contaminants using the electrically conducting electrode covered with the anodized porous alumina layer facilitating removal of the contaminants from the water through ion concentration polarization and minimizing wastage of water.

The invention belongs to the technical field of high polymer materials, and discloses a high-heat-dissipation chemical-resistant anti-static new material which is prepared from the following components in percentage by mass: 40-65% of a basic resin component, 15-30% of functional filler and 1-5% of an auxiliary agent, and the high-heat-dissipation chemical-resistant anti-static new material is prepared from the following components in percentage by mass: 40-65% of a basic resin component, 15-30% of a functional filler and 1-5% of an auxiliary agent by virtue of precise parameter control of gradient pressure rise, multi-temperature-zone temperature control and The nano-scale carbon tubes, the graphene, the hexagonal boron nitride and other functional fillers are uniformly dispersed in a resin matrix to form a continuous heat conduction and dissipation network, a heat conduction and dissipation exchange channel similar to the chimney effect is constructed, an internal heat source flows to the outside in the form of air rheology to dissipate heat, the heat dissipation efficiency is greatly improved, and the corrosion resistance is excellent. The material replaces metal to become a good thermoplastic heat conduction and dissipation / static electricity / corrosion-resistant material, the problem of heat deposition on photoelectric energy, microelectronics, electric appliances, lighting, automobiles and industrial products at present is solved, and the material is full of the emerging field and wide application of diversified industrial system engineering.

The invention relates to a method for preparing a graphene / copper composite material by using solid carbon source assisted codeposition growth, which comprises the following steps: pre-cleaning and heating a substrate in a thermal evaporation system, thermally depositing metal copper on the surface of the substrate, and thermally depositing carbon atoms on the surface of the substrate by using a solid carbon source, and graphene is grown on the surface of the metal copper in the process of depositing the metal copper. According to the method, copper and carbon atoms are synchronously deposited, graphene directly grows on the surfaces of copper particles, the content of graphene in the copper-based material can be increased, and then the conductivity of the copper-based material is improved.

The present invention provides a method for preparing a nitride semiconductor material, comprising the following steps: (1) forming a high-absorption layer on one surface of a substrate; (2) depositing a nitride semiconductor material on the high-absorption layer or on the other surface of the substrate opposite to the high-absorption layer by means of microwave heating; the high-absorption layer is formed of a material having a dielectric loss factor of not less than 0.01. By the method of the present invention, uniform heat conduction of the nitride semiconductor material can be achieved. At the same time, the method of the present invention has higher energy utilization efficiency. In the method of the present invention, energy is concentrated and absorbed by the material to be heated, and the cavity of the vacuum deposition equipment will not be heated, which is beneficial to extending the maintenance and use of the equipment.

The invention discloses an ionic liquid functionalized HKUST-1 photocatalyst as well as a preparation method and application thereof, and relates to the technical field of organic catalysis, the preparation method comprises the following steps: adding a metal organic framework HKUST-1 and 1-ethylpyridine hydrobromide into an organic solvent, and carrying out reflux heating, refiltering, washing, vacuum drying and heating activation. The invention also provides the ionic liquid functionalized HKUST-1 photocatalyst and an application of the ionic liquid functionalized HKUST-1 photocatalyst in catalysis of a carbon dioxide cycloaddition reaction. The ionic liquid EPB is immobilized on the HKUST-1 material by adopting a thermal deposition method, efficient CO2 cycloaddition reaction is realized under a room-temperature photocatalytic condition, the catalytic efficiency and the reaction yield are remarkably improved, the cycle performance is excellent, and the application value is relatively high.

The invention relates to the field of heat dissipation, in particular to an anti-blocking water circulation radiator which comprises a radiator body, a body built-in filter screen structure, a temperature sensor array and other components, the radiator body is provided with a hot water port and a cold water port, and heat dissipation is executed by adopting a specific control method. For example, data are collected through a temperature sensor array, a model is established to calculate the heat dissipation efficiency, and a phase change material heat storage module, a fault tolerance mechanism and the like are further arranged. The technical effects that the heat dissipation condition of the radiator can be monitored, regulated and controlled in real time, blockage is effectively prevented, the working parameters of the micro-channel pump set can be dynamically adjusted according to the heat sink accumulation trend, heat temporary storage and directional forced heat dissipation are carried out when the local temperature rise is too fast, meanwhile, the fault-tolerant capability is achieved, and stable operation of the radiator is guaranteed are achieved.

The present invention belongs to the field of lighting technology, and particularly relates to a light-emitting component and a manufacturing method thereof. The light-emitting component includes a light-emitting structure, a thermoelectric conduction structure, a heat-conducting structure, and a support structure; the support structure is provided with an installation groove, the light-emitting structure, the thermoelectric conduction structure, and the heat-conducting structure are sequentially stacked and all accommodated in the installation groove; the light-emitting structure has a first electrode and a second electrode, the first electrode and the second electrode are electrically connected to the support structure and the thermoelectric conduction structure respectively, and the thermoelectric conduction structure is electrically connected to the support structure; wherein, the thermoelectric conduction structure can receive heat from the light-emitting structure and transfer the heat to the heat-conducting structure; the support structure can receive heat from the heat-conducting structure and transfer the heat to the outside. The present invention can reduce the heat deposition in the light-emitting component.

The invention discloses a high-power negative ion source reverse positive ion flow measurement method, and relates to the field of high-current ion source diagnosis, and the method comprises the steps: obtaining the cooling water flow and the cooling water temperature of each component of a high-power negative ion source; a specific backboard is designed and manufactured for reverse positive ion flow profile measurement; the real-time temperature rising value and flow of cooling water on the ion source component are measured, and heat deposition on each component is obtained through analysis; the temperature rise value and the flow of cooling water on each component under the beam extraction condition are measured, heat deposition on each component is analyzed, the power deposition change on the component bombarded by the reverse positive ion current when the beam extraction condition exists or not is compared and analyzed, and the reverse positive ion current power under the operation parameters is obtained; the negative ion source operation parameters are singly changed, the experiment is repeated, and the influence rule of the parameters on the reverse positive ion flow is obtained. According to the invention, a basis is provided for design optimization of the ion source expansion chamber back plate and the Faraday shield back plate and safe and stable operation of the high-power negative ion source.

The application discloses a high-energy outgoing electron protection device for a neutral beam injection negative ion source, belongs to the field of the neutral beam injection negative ion source of magnetic confinement nuclear fusion, and mainly comprises a protection plate, a supporting base, a thermocouple and an infrared thermal imager. The protection plate is used for intercepting high-energy outgoing electrons. The supporting base is used for mounting and positioning the protection plate in a beam line vacuum chamber. The thermocouple is used for realizing real-time monitoring of the local temperature of the protection plate. The infrared thermal imager is used for observing a large-area heat source of the protection plate and determining the heat deposition position distribution of the high-energy outgoing electrons. The application realizes protection of heat load sensitive components such as a cryogenic pump by intercepting the high-energy outgoing electron beam and monitoring the deposition position of the high-energy outgoing electron beam, promotes the performance improvement and scheme perfection of an electron suppression means, is favorable for long-pulse stable operation of the negative ion source, and can effectively protect the high-energy outgoing electron in the neutral beam injection negative ion source.

This invention discloses a method for preparing nano-titanium dioxide using hydrochloric acid, a byproduct of the titanium dioxide production process via the chloride process, comprising the following steps: (1) distilling and concentrating the hydrochloric acid to obtain a titanium solution with a concentration of 4–10 mol / L; (2) diluting the titanium solution with water to obtain a diluted titanium solution with a concentration of 1–4 mol / L; (3) slowly adding an alkaline solution to the diluted titanium solution until it approaches the critical deposition point, at which point the addition of the alkaline solution is stopped, resulting in a critical deposition titanium solution; (4) heating and stirring the critical deposition titanium solution to deposit the solution, followed by filtration, washing, drying, calcination, and grinding to obtain rutile nano-titanium dioxide. This invention employs a critical homogeneous precipitation method, where alkali is slowly added at room temperature to neutralize the solution to the critical deposition point. This titanium solution serves as a homogeneous active reaction liquid, and low-temperature heating deposition is used to prepare nano-titanium dioxide with uniform particle size distribution.

The invention relates to the technical field of resource recovery, and discloses a low-temperature concentration recovery system and process for phenanthrene derivative crystallization mother liquor, the low-temperature concentration recovery system comprises a concentration tank, a preheating tank, a water tank and an air compressor, and further comprises a heater rotatably mounted in the concentration tank, and the heater is composed of a heat exchange tube bundle, a wind power driving mechanism and a conveying air tube; according to the technical scheme, through cooperative work of the air compressor, the heater, the automatic cleaning mechanism and the stirring mechanism, efficient concentration and resource recovery of the crystallization mother liquor are achieved; specifically, the air compressor drives the heater to rotate by compressing and heating gas, and drives the rotation of the heat exchange tube bundle to generate disturbance and transposition, so that the evaporation efficiency is improved; when the heater rotates, the multi-hole scraping disc and the cleaning assembly in the automatic cleaning mechanism also move in a reciprocating mode to automatically clean the heat exchange tube bundle, and therefore heat resistance increase caused by long-term heated deposition is avoided, and the heat exchange effect is guaranteed.

The utility model relates to the technical field of alkali metal deposition, in particular to an alkali metal heating deposition system which comprises a rack, a heating furnace arranged on the rack, a hot drying oven arranged on the rack and located on one side of the heating furnace and a cooling water tank arranged on the rack and located below the hot drying oven. The pipeline comprises a transverse pipe fixed to the rack and arranged in the hot oven in a penetrating mode, a first vertical pipe communicating with one end of the transverse pipe and a second vertical pipe detachably connected to the transverse pipe and communicating with the transverse pipe, one end of the first vertical pipe penetrates through the top wall of the heating furnace and extends into an inner cavity of the heating furnace, and alkali metal arranged in a heating furnace body is installed at the end of the first vertical pipe; the second vertical pipe penetrates through the bottom wall of the hot drying oven, the lower portion of the second vertical pipe extends into an inner cavity of the cooling water tank, and a workpiece is placed on the lower portion of the second vertical pipe. The method has the effect of improving the deposition efficiency of the alkali metal.

The present application relates to a kind of needleless temperature stirring additive component method.The present application is deposited on substrate according to preset path to complete a layer, then uses continuous laser to heat deposition layer to dynamic recrystallization temperature, and uses needleless stirring head to carry out stir-frying processing to deposition layer in loading state, so that component generates plastic deformation at dynamic recrystallization temperature, realizes grain refinement, makes component internal form cyclic microstructure of equiaxial crystal or columnar crystal-equiaxial crystal, significantly improves the mechanical properties of component, reduces the tensile stress in additive process, produces highly nanocrystalline surface, obtains relatively deep surface gradient nanolayer.

This invention belongs to the field of catalyst technology, and relates to a surface-reconstructed heterojunction catalyst, its preparation method, and its application. The preparation method includes the following steps: dissolving cobalt salt, iron salt, and praseodymium salt in deionized water, heating and spraying the solution onto a support to obtain praseodymium-doped cobalt-iron layered double hydroxide; mixing the praseodymium-doped cobalt-iron layered double hydroxide with a phosphorus source and calcining under an inert atmosphere to obtain praseodymium-doped CoP / Fe2P; and subjecting the praseodymium-doped CoP / Fe2P to electro-oxidation treatment to obtain Pr6O. 11 Cluster-modified CoFeOOH heterojunction catalysts. Through the synergistic application of spray thermal deposition-phosphating-electrooxidation techniques, stable construction and electrochemical activation of the heterojunction interface were achieved, significantly improving the catalyst's corrosion resistance and resistance to chlorine evolution competition in chlorine-containing alkaline systems. An overpotential of only 223 mV was required to reach 100 mA·cm⁻¹. ‑2 The current density is maintained at a stable level for 500 hours.