110 results about "Active surface area" patented technology

The embodiment of the invention provides an energy storage device with conductive polymer sponge and an intelligent monitoring system of the energy storage device, and belongs to the field of electrochemistry, the energy storage device comprises a shell, and an electrode assembly, electrolyte and a current collector which are arranged in the shell; the electrode assembly comprises a positive electrode, a negative electrode and a diaphragm arranged between the positive electrode and the negative electrode, and the positive electrode and the negative electrode are composite electrodes of conductive polymer sponge; the conductive polymer sponge is a polymer sponge which is prepared through an in-situ chemical oxidation polymerization technology and has a porous network, and the energy storage device further comprises a control system used for controlling the operation state of the energy storage device. According to the embodiment of the invention, the polymer sponge with a highly interconnected porous network is prepared through an in-situ chemical oxidation polymerization technology on the basis of a unique microstructure of the conductive polymer sponge, and the three-dimensional structure of the polymer sponge increases the effective surface area of an electrode and improves electrochemical reaction active sites, so that more efficient charge transmission and storage are realized.

Methods, systems and devices for photo-electrolyitic PFAS destruction including a photoreactor vessel configured to receive an aqueous solution including PFAS, a UV light source configured to direct UV light onto the aqueous solution in the photoreactor vessel, a cathode within the photoreactor vessel configured to contact the aqueous solution, an anode in an electrolyte solution, an electrical power supply configured to provide a voltage difference between the anode and cathode, and a membrane or ionic bridge between the anode and cathode. The cathode may be a mesh and may have a high surface area construction with an electrochemically active surface area that is greater than the geometric surface area.

A continuous transcutaneous monitoring sensor system comprising a sensor area comprising a working electrode, the working electrode having an electrochemically active surface area at least partially implanted, at least one membrane adjacent the electrochemically active surface area, and a controller configured to provide a swept potential range to the at least partially implanted electrochemically active surface area is disclosed. A method of continually detecting fouling and electrochemically removing fouling of an implantable sensing electrode is also disclosed.

Disclosed herein are methods for producing electrodes comprising single-layer 1T′-transition metal dichalcogenide (TMD) nanosheets. The method includes filtering a suspension of single-layer 1T′-TMD nanosheets over a polymeric substrate to produce the electrode, wherein, the single-layer 1T′-TMD nanosheets of the electrode are no more than 1,000 nm in thickness; the electrode comprises at least 70% 1T′-phase; and the electrode has a calculated electrochemical active surface area (ECSA) that is about 10-fold higher than that of a control electrode, which comprises 2H-TMD nanosheets. Also disclosed herein are methods for deionizing a fluid. The method includes steps of discharging the fluid in an electrochemical capacitor at a constant voltage of no more than 0.5 V to deionize the fluid, wherein the electrochemical capacitor is characterized in having the electrode comprising single-layer 1T′-TMD nanosheets produced by the present method.

The invention relates to an efficient and stable electrode material and a preparation method thereof.The preparation method comprises the steps that a nickel net substrate is pretreated, then an electroplating solution containing a nickel source and a pore forming agent is prepared, a layered nickel hydroxide layer is generated on the substrate through electro-deposition, then ions enter the nickel hydroxide layer through a soaking embedding method or an electrochemical embedding method, and the electrode material is obtained. And finally, sintering in a nitrogen atmosphere, controlling the sintering temperature, the sintering time and the heating and cooling rate, and performing cooling after-treatment to obtain the electrode material. Compared with the prior art, the catalytic performance and the stability of the electrode are optimized through the steps of ion embedding and sintering. The method is suitable for preparing an electrode for efficient water electrolysis reaction, a porous structure promotes rapid emission of gas and increases the active surface area, and ions embedded in the surface are used for forming a shell with high catalytic activity.

The invention discloses platinum nanoparticles doped with non-noble metals, a preparation method and application thereof, and aims to realize large-scale production and application of platinum-based nanoparticles with high efficiency, low cost and high catalytic activity. In the early-stage preparation process, it is ensured that inert bubbles of the nanoscale are always filled with reaction liquid. According to the invention, sodium bicarbonate is used as a gas generating agent or other ceramic and thin film structures with micro-nano apertures are used as a micro-nano bubble generator, inert gas is subjected to nano bubbling, and nano-scale bubbles generated by circulation not only can enable reactants to be in uniform contact, but also provide a template effect in a nano-particle forming stage; the active surface area of the catalyst is obviously increased. According to the method, the size of the platinum nanoparticles doped with the non-noble metal can be accurately adjusted by strictly controlling the size of the nano bubbles and the reaction conditions. The process provides an important means for optimizing the performance of the catalyst and powerfully supports the macro preparation of the low-cost and high-efficiency catalyst.

The present invention provides a method for preparing a silicon oxide-supported single-atom copper material. Compared with the prior art, the present invention suppresses the aggregation of metal atoms through an interface restriction strategy to obtain a silicon oxide-supported single-atom copper material. The material is amorphous silicon oxide-supported single-atom copper. The copper element has excellent electro-reduction dechlorination activity, and the active sites are designed in a targeted manner. The silicon dioxide gaps and rich coordination bonds generated in situ are cleverly used to anchor the single-atom copper. At the same time, two-dimensional porous silicon dioxide is used as a carrier, which not only improves the chemical and electrochemical stability of the catalyst, but also increases the active surface area of ​​the catalyst, thereby comprehensively improving the electrochemical performance of the catalyst, achieving the effect of dechlorination and detoxification in a short time, and its applicable pH range is wide, and the electrode material used in the present invention is a non-precious metal with a wide source, low cost, and in line with the concept of green economy and sustainable development.

The invention discloses a method for surface reconstruction of a ligand-regulated oxygen evolution catalyst, the catalyst and application of the catalyst. The methods involve ligand tuned surface reconstruction capable of simultaneous incorporation of doped cations and oxygen vacancies to improve the catalytic activity of the OER. Surface engineered heterointerface structures consisting of nickel-based precatalysts and (oxy) hydroxides have been developed based on the ligand-induced delayed doping effect using ammonia complexes in alkaline electrolytes by using nickel telluride, nickel oxide, nickel sulfide or nickel selenide as the precatalyst. The method is simple in process, easy to operate and capable of being industrially popularized; and the prepared oxygen evolution catalyst has the characteristics of abundant active sites and oxygen vacancies, large chemical active surface area, good stability, controllability and low cost.

The invention belongs to the field of electrocatalyst preparation and application, and particularly relates to a CNS-FeNi2S4 / NF composite electrocatalyst and a preparation method and application thereof. According to the preparation method, a one-step hydrothermal method and a one-step solvothermal method are adopted, foamed nickel is taken as a substrate, and FeNi2S4 supported by cocatalysts CNS with different contents is loaded on the foamed nickel, so that the CNS-FeNi2S4 / NF composite electrocatalyst is obtained. By optimizing the content of the cocatalyst CNS, the composite electrocatalyst with excellent oxygen evolution performance is obtained, the overpotential of the electrocatalyst is reduced, and the electrochemical active surface area is increased, so that the composite electrocatalyst is subjected to electrocatalytic oxygen evolution reaction in an alkaline solution, and has high activity and good stability. The catalyst has the advantages of low cost, simple synthesis steps, greenness, no pollution and the like.

The invention discloses an electrochemical microneedle biosensor and a preparation method thereof. The biosensor is a three-electrode system, comprising a working electrode, a counter electrode and a reference electrode, wherein the substrate materials of the three electrodes are all silicon-based high-density microneedle arrays; wherein the working electrode is a silicon-based high-density microneedle with a sputtered gold layer, gold nanoparticles with a dendrite structure are deposited on the surface, and a carcinoembryonic antigen (CEA) aptamer with high specificity is combined through an Au-S bond; the electrochemical microneedle biosensor provided by the invention adopts a high-density silicon-based microneedle array to construct a three-electrode system to detect carcinoembryonic antigen in tissue fluid, the working electrode has gold nanoparticles with a dendrite structure, and the active surface area is preferably increased, the patch-type structure with three electrodes in one is easy to operate, can realize non-invasive rapid detection, and has high detection sensitivity, good specificity and low detection limit, thereby providing a simple and quick method for detecting tumor biomarkers such as carcinoembryonic antigen.

Despite the existence and deployment of a range of antimicrobial / disinfectant / sterilization technologies and products, transmission of infectious diseases remains a significant problem worldwide, continuing to cause hundreds of millions of infections and millions of deaths every year of both human beings and animals. State-of-the-art technologies suffer from several disadvantages including being discrete in space and time, being overly dependent on human skill and discipline, and in some cases having harmful side-effects to human health. This invention proposes a series of industrial grade antimicrobial product designs, and materials and methods to make them highly effective products that offer continuous antimicrobial action, with minimum dependence on human discipline and skill once deployed, and with no harmful side-effects. Methods may include either or both first and second materials be formed by vapor or solution-based coating schemes and many may be antimicrobial in nature. Nanopores and / or nanotubes produce an ultra-high anti-microbially active surface area.

The invention discloses a preparation method of graphene nano copper yttrium oxide composite powder, and relates to the technical field of photocatalytic wastewater treatment and new materials. The preparation method comprises the following steps: adding absolute ethyl alcohol and starch into ultrapure water, uniformly stirring, adding graphene, performing ultrasonic dispersion, adding urea, a copper sulfate solution and a yttrium nitrate solution, and uniformly stirring to obtain a mixed solution; adding the mixed solution into a supercritical reaction device, setting a heating program, preserving heat, cooling to room temperature, taking out a reactant, centrifuging, filtering, washing and drying to obtain the graphene nano copper oxide composite powder. Nano copper oxide and nano yttrium oxide are uniformly intercalated and distributed in pores and the surface of redox graphene, the yttrium oxide increases the active surface area of copper oxide, excitons are effectively generated in a metal oxide system, the photocatalytic activity of the graphene nano copper oxide yttrium composite powder is remarkably improved, and the graphene nano copper oxide yttrium composite powder has a wide prospect in the aspect of treating organic wastewater.

The invention relates to the technical field of organic electrochemistry, in particular to a catalytic material, a preparation method of the catalytic material and application of the catalytic material in electro-catalysis alcohol selective oxidation assisted hydrogen production. The efficient and stable bimetallic-doped nickel-based metal phosphide catalytic material is synthesized through simple hydrothermal and phosphating methods, the electronic structure on the surface of the catalyst is optimized, and the active sites of the catalyst are further increased. The catalytic material is of a rough sheet structure, a three-dimensional net-shaped pore structure is formed, the diffusion capacity of ions and electrons at an interface is enhanced, the active surface area in an electrode-electrolyte contact area is effectively increased, and therefore the catalytic efficiency and the dynamic performance are improved. The catalytic material is applied to alcohol electrocatalytic oxidation assisted hydrogen evolution, renewable energy sources can be used for driving an electrocatalytic hydrogen evolution reaction, the hydrogen production energy consumption is greatly reduced, the hydrogen production rate is increased, and meanwhile, high-added-value chemicals such as acids are obtained by catalyzing alcohol directional oxidation.

The invention discloses a multi-stage plate-type electro-catalytic membrane reactor for degrading organic matters in reverse osmosis concentrated water of coking wastewater and application of the multi-stage plate-type electro-catalytic membrane reactor. The multi-stage plate-type electro-catalytic membrane reactor is internally provided with a chamber for electrochemical reaction, and consists of a plurality of cathode chambers and anode chambers which are the same in number and are uniformly alternated, a conductive contact pin, a water inlet end and a water outlet end, the distance between every two cavities is 10 mm, the multiple cathode chambers and the multiple anode chambers which are the same in number and are evenly and alternately arranged are detachable plate faces, operation is convenient, and environment friendliness is achieved. The multi-stage plate-type electro-catalytic membrane reactor is simple in design, wastewater runs in the reactor in a circulation mode, mass transfer can be improved, the electrochemical active surface area can be increased, the current utilization efficiency can be improved through a parallel power connection mode, and the service life of the reactor is prolonged. The device has the advantages of high organic matter removal efficiency, convenience in actual operation, automatic management, good stability, low operation energy consumption, reusability and the like, and has research significance in the field of electrochemical water treatment.

This invention discloses a Pt / O-NCP catalyst and its preparation method. It utilizes self-developed nanoporous carbon (NCP) as a support, which is modified to change the internal pores from a hydrophobic to a hydrophilic state. A special preparation method is then used to obtain the noble metal catalyst Pt / O-NCP. During catalyst loading, most Pt nanoparticles are located within the mesopores of the support, maximizing the direct contact between the polymer and Pt (sulfonic acid poisoning). This solves the problems in existing catalysts where Pt nanoparticles are prone to dissolution and carbon corrosion under voltage fluctuations, leading to Pt growth and aggregation, thus avoiding the reduction in catalytic performance caused by a decrease in the active surface area of ​​the catalyst. Furthermore, this catalyst can also address the significant decrease in overpotential of ordinary carbon support materials under low humidity, resolving the typical performance degradation of PEMFCs under low humidity conditions.

The invention provides electroplating liquid, a water electrolysis hydrogen evolution electrode and a preparation method of the water electrolysis hydrogen evolution electrode, and belongs to the technical field of water electrolysis hydrogen production. The electroplating solution provided by the invention is a weakly acidic platinum plating solution, has the advantages of good stability and reusability, and ensures the stability of a plating layer while effectively regulating and controlling the electrode loading capacity in a circulating electroplating manner. According to the preparation method of the water electrolysis hydrogen evolution electrode, the electrochemical stability of the electrode can be effectively improved, the binding force of a plating layer and a substrate is enhanced, the electrochemical surface area is increased, the utilization rate of platinum is increased, the activity is improved, and the performance of the prepared electrode is remarkably improved.

The invention belongs to the technical field of environmental engineering, and provides preparation of a phosphorus-doped high-curvature regulated titanium black porous electrode and application of the phosphorus-doped high-curvature regulated titanium black porous electrode in deep reduction of an electrochemical enhanced pharmaceutical wastewater resistance gene. The high-curvature tip nanotube structure is prepared through NH4F electrochemical etching, the increased electrochemical active surface area and the tip enhanced electric field effect synergistically promote charge enrichment and electron accumulation, and the average current density of the system is remarkably improved. P doping further optimizes the surface curvature of titanium black, lattice expansion is induced by regulating lattice tensile strain, Ti track overlapping is reduced, a d band is narrowed, and the energy level of the d band is shifted upwards. The ratio of Ti < 3 + > and oxygen vacancies in the doped material are remarkably increased, the generation capacity of. OH is enhanced, the generation rate of < 1 > O2 is increased, and high-efficiency and low-power-consumption catalytic degradation of resistance genes and antibiotics in pharmaceutical wastewater is realized by combining the characteristics of two free radicals. The electrode is simple in preparation process, raw materials are cheap and easy to obtain, and the electrode has large-scale production potential.

Methods and systems for state of health (SOH) monitoring in a fuel cell. Methods and systems for monitoring and estimating a state of health (SOH) of a fuel cell are disclosed herein. The state of health of the battery may be estimated by determining a loss of an electrochemical active surface area (ECSA) of the cathode catalyst. The method includes providing an external step excitation to the cell, recording a response of the fuel cell to the external step excitation, and determining an analytical expression of the recorded fuel cell response. Once an analysis expression is determined, at least one parameter of the analysis expression is compared to a start of life (BoL) value of the parameter to determine the ECSA loss.

The application discloses a method for synthesizing Au-Pt nanowire arrays by an electrochemical deposition method on carbon paper with aniline as a ligand and application thereof, and can be applied to methanol electro-oxidation reaction. After growing gold nanowire arrays on a conductive substrate by using an electrochemical deposition method with aniline as a ligand, Au-Pt nanowires are synthesized by a secondary electro-deposition mode. The electrochemical deposition has controllable reduction capacity, convenient operation and environmental friendliness. The combination of gold nanowires and platinum (Pt) can significantly improve the activity of a catalyst. The diameter of gold-platinum nanowires prepared by the electrochemical deposition method assisted by an aniline ligand can reach 30 nanometers. The increase in the size is helpful to expand the electrochemical active surface area, thereby enhancing the electron transmission efficiency and further improving the electro-catalytic performance. The gold nanowires are integrated into platinum-based nanomaterials, and for an anode catalyst of a direct methanol fuel cell, the gold nanowires can significantly improve the catalytic efficiency of a methanol oxidation reaction.

The utility model discloses a microporous irregular fluctuating semiconductor substrate, which comprises a substrate body, the substrate body comprises a top surface, a bottom surface and side surfaces, the top surface and the bottom surface are irregular fluctuating surfaces, and the substrate body is provided with a plurality of micropores communicated with the top surface and the bottom surface. Particularly, the fluctuating root mean square value of the irregular fluctuating surface is not less than 10 nanometers, the equivalent diameter of the micropores is between 1 micrometer and 100 micrometers, and the hole pitch of the micropores is between 1 micrometer and 100 micrometers. According to the utility model, the maximum utilization of the active surface area can be realized, the mass transfer effect is effectively promoted, the reaction activity of the surface in the semiconductor deposition process is improved, and the resistance of a semiconductor device to oxidation erosion is improved.

Disclosed are a method of manufacturing a carbon support for a fuel cell catalyst, a carbon support for a fuel cell catalyst manufactured according to the method, and a catalyst for a fuel cell including the same. The method may include using various organic materials containing N and various carbon supports and thus provide excellent economic feasibility. In addition, pyridinic N and pyrrolic N of doped N can be adjusted at an optimal content ratio so that the carbon support for a fuel cell catalyst manufactured and the catalyst for a fuel cell including the same have excellent electrochemical resistance and excellent electrochemical characteristic due to an increase in an electrochemically active surface area, and excellent durability due to an increase in thermal durability.

The present invention belongs to the technical field of photoelectrocatalytic carbon dioxide reduction and discloses a preparation method of a Z-type heterojunction composite catalyst, comprising the following steps: dispersing potassium hexatantalate in an anhydrous ethanol solution of cobalt phthalocyanine, stirring, ultrasonicating, and evaporating the anhydrous ethanol; calcining the obtained solid product at 300°C for 2h to obtain K8Ta6O 19 / CoPc composite catalyst. The present invention uses a polyacid K8Ta6O rich in oxygen vacancies 19 By introducing cobalt phthalocyanine, the two semiconductors form a Z-type heterojunction, which can effectively reduce the electron-hole recombination rate, increase the carrier mobility rate, and also contain more oxygen vacancies and a larger electrochemically active surface area, which can provide more active sites and produce strong interactions with CO2 molecules, thereby greatly improving the photoelectrocatalytic carbon dioxide reduction performance of the catalyst.

The invention relates to a nano spherical NiFe-LDH (at) M (at) Cu oxygen evolution composite material and a preparation method and application thereof. The composite material comprises a copper substrate, a metal functional layer M is arranged on the copper substrate, a NiFe-LDH active layer is arranged on the metal functional layer M, and the NiFe-LDH active layer comprises nano spherical NiFe-LDH. The metal functional layer M comprises an anti-corrosion functional layer, and a catalytic structure layer is further arranged on the anti-corrosion functional layer. The metal functional layer M and the NiFe-LDH active layer are sequentially deposited on a pretreated copper substrate, so that the NiFe-LDH composite material is obtained. Wherein the anti-corrosion function layer can enhance the corrosion resistance of the base material, the catalytic structure layer can increase the active surface of the catalyst and provide support for the catalytic layer, meanwhile, the high conductivity of copper can be reserved, and the nano spherical NiFe-LDH has the large active surface area. Compared with the prior art, the NiFe-LDH-coated M-coated Cu prepared by the method has the advantages of low cost, high performance and stable structure, and is suitable for large-scale application on industrial conditions.

To satisfy the application requirement to meet a high data rate and obtain a large coverage in an optical wireless communication system, an optical front-end subsystem (100) is disclosed in the present invention. The optical front-end subsystem (100) comprises a first photodiode (110) with a first active surface area and a second photodiode (120) with a second active surface area, wherein the second active surface area is larger than the first active surface area. Depending on the received signal strength, either the branch with the first photodiode (110) or the branch with the second photodiode (120) is selected to provide an output signal of the optical front-end subsystem (100). Receiver diversity is achieved by making use of the first photodiode to support high speed communication and the second photodiode to support large coverage communication.

The invention relates to the fields of electrochemistry, food safety and environment detection, in particular to a preparation method, a product and application of a nickel-nitrogen co-doped carbon aerogel material. The preparation method of the nickel-nitrogen co-doped carbon aerogel material comprises the following steps: step 1, uniformly mixing nickel acetate tetrahydrate and 2-methylimidazole, and carrying out solid-phase reaction to obtain a solid solution; and step 2, carrying out carbonization treatment on the solid solution to obtain the nickel-nitrogen co-doped carbon aerogel material. The nickel-nitrogen co-doped carbon aerogel material shows excellent catalytic performance on caffeine and has high sensitivity, a wide detection range and a low detection limit due to the fact that Ni and N-doped carbon aerogel has a high electron transfer rate, more active centers are exposed, the effective active surface area is large, and the catalytic performance of caffeine is greatly improved. The catalytic performance of the sensor on caffeine is greatly improved.

The invention provides an iron nickel phosphide coated NiMoO4 nano array electrocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving a first nickel salt and a molybdenum source in water, carrying out first heating reaction together with foamed nickel, and carrying out heat preservation, so that a NiMoO4 nano array grows on the surface of the foamed nickel to obtain a product; s2, ammonium fluoride, urea, ferric salt and second nickel salt are dissolved in water and then mixed with a product obtained in the step S1, a second heating reaction is conducted, heat preservation is conducted, a FeNi-LDH shell layer grows on the surface of the NiMoO4 nano array, and a product is obtained; s3, hypophosphite and a product obtained in the step S2 are subjected to high-temperature phosphating treatment, FeNi-LDH is converted into a Fe3P / Ni3P heterojunction structure, and the NiMoO4 nano array electrocatalyst coated with the iron-nickel phosphide is obtained. The electrocatalyst has a relatively high active surface area, and has relatively good catalytic performance and stability when being used for electrolyzing seawater.

The invention belongs to the technical field of groundwater pollution treatment, and discloses a dynamic evaluation method and system for the service performance of a PRB material in groundwater pollution remediation, and the method comprises the steps: obtaining a pollution remediation concentration curve, and calculating the actual removal amount of a filling material to hexavalent chromium pollutants according to the concentration curve; calculating the active surface area of the filling material, and establishing a correlation model of the active surface area and the removal performance of the filling material based on the active surface and the actual removal amount; measuring complex resistivity spectrum data of different areas at different time points of the polluted site and extracting characteristic parameters of the complex resistivity spectrum data to obtain complex resistivity characteristic parameters; and constructing a mapping model of the actual removal amount of the hexavalent chromium pollutants and the complex resistivity characteristic parameters, and performing zoned quantitative evaluation on the service performance of the filling material based on a calculation result of the mapping model. According to the invention, a whole-process dynamic evaluation system of the repair concentration, the adsorption performance and the electro-physical characteristics is integrated, and real-time dynamic monitoring and quantitative evaluation of the material performance in the in-situ repair project are realized.

The application relates to the field of organic electrochemistry, in particular to a catalytic material, a preparation method thereof and application of the catalytic material in electrocatalytic selective oxidation of alcohols to assist hydrogen production. The application synthesizes a high-efficiency stable bimetallic doped nickel-based metal phosphide catalytic material through a simple hydrothermal and phosphorization method, optimizes the electronic structure of a catalyst surface, and further increases active sites of the catalyst. The catalytic material presents a relatively rough sheet structure, forms a three-dimensional net-like pore structure, enhances the diffusion capacity of ions and electrons at an interface, effectively increases the active surface area in a contact area between an electrode and an electrolyte, and thus improves the catalytic efficiency and kinetic performance. The catalytic material is used in electrocatalytic oxidation of alcohols to assist hydrogen evolution, is helpful to renewable energy driven electrocatalytic hydrogen evolution reaction, greatly reduces hydrogen production energy consumption and improves hydrogen production rate, and simultaneously catalyzes directional oxidation of alcohols to obtain acid and other high-value-added chemicals.

The present application provides a composite alkaline hydrogen evolution electrode, a preparation method thereof, and a water electrolysis device, relating to the field of electrodes for water electrolysis. The composite alkaline hydrogen evolution electrode comprises a porous metal substrate, a V-VI group compound semiconductor layer, and a transition metal sulfide compound layer arranged in a stacked manner. The present application uses a combination of a porous metal substrate, a V-VI group compound semiconductor layer, and a transition metal sulfide compound layer as an electrode, which increases the roughness of the electrode surface and the electrochemically active surface area of the electrode. The electrode of the present application has high catalytic activity for hydrogen evolution reaction. Moreover, the electrode of the present application also has high resistance to high temperature and strong alkali.

The present application relates to a kind of NiFeMo-based spherical porous composite catalytic material and its preparation method and application, belong to electrocatalytic material technical field.The present application is aimed at solving the problems of complex preparation process of existing material, powder is easy to agglomerate, insufficient controllability of morphology and limited continuous preparation capacity.A kind of NiFeMo-based spherical porous composite catalytic material is provided, it is the composite powder containing Ni, Fe, Mo element, presents monodisperse spherical particle, with multi-level porous structure, Ni, Fe, Mo molar ratio is 10:10:(0.5~2);It is prepared by ultrasonic spray pyrolysis one-step method.The electrochemical active surface area of the material of the present application reaches 0.6303 cm 2 , higher than NiFeV (0.3360 cm 2 ) And NiMo (0.1485 cm 2 ) ; Hydrogen evolution driving potential is smaller, charge transfer resistance is lower, and it is suitable for alkaline electrolytic water cathode hydrogen evolution catalyst.