110results about How to "Improve electrocatalytic activity" patented technology

The invention discloses a PPy / NiCo-LDH / NF composite material and a preparation method and application thereof, and belongs to the technical field of electrocatalyst preparation. The PPy / NiCo-LDH / NF composite material provided by the invention comprises a foamed nickel substrate as well as NiCo layered double hydroxides and polypyrrole which are compounded on the foamed nickel substrate, the polypyrrole is compounded on the surface of the NiCo layered double-metal hydroxide. The surface of NiCo layered double hydroxides is induced and modified by polypyrrole, so that the layered double hydroxides are arranged more regularly and densely, efficient mass transfer of electrons is facilitated, an electron transfer interface can be induced, the composite material exposes more catalytic active sites, the electron interaction is enhanced, and the catalytic activity of the composite material is improved. According to the present invention, with the preparation method, the excellent electrocatalytic activity is provided for the HER and the OER in the alkaline medium, and the excellent cycle stability is provided for the HER and the OER in the alkaline medium after the 1000 times of cycle, such that the wide application prospect in the electrocatalytic reaction is provided.

The invention relates to a defect-rich cobalt-doped MoS2 / NiSe2 heterojunction nano array electrode as well as a preparation method and application thereof, and belongs to the field of electro-catalysis and new energy materials. The electrode is composed of a self-supporting MoS2 / NiSe2 heterojunction nano array, cobalt atom doping and abundant structure defects are introduced at the same time, and the hydrogen evolution reaction (HER), oxygen evolution reaction (OER) or urea oxidation reaction (UOR) activity of an electrode material in alkaline electrolyte is remarkably improved. The prepared electrode material has the advantages of low cost, high activity, good stability and the like, and has wide application prospects in the fields of water electrolysis, metal-air batteries, domestic sewage treatment and the like.

The invention belongs to the field of preparation processes of nano porous materials, and relates to a preparation method of a low-cost high-entropy alloy aerogel electrocatalytic material. The preparation method comprises the following steps: uniformly stirring and mixing five metal salt solutions, adding a reducing agent, and finally obtaining the low-cost, high-activity and multifunctional high-entropy alloy aerogel material by virtue of a freeze-thawing technology, solvent replacement and a freeze-drying method. The invention has the advantages of low material cost and convenient process, and also has the advantages of low energy consumption, lower cost, multifunction integration, higher stability and easy realization of large-scale production.

The invention belongs to the technical field of ammonia synthesis and electro-catalysis, and particularly relates to a preparation method and application of high-entropy alloy aerogel for electro-catalysis. The preparation method comprises the following steps: mixing an inorganic metal salt in a solvent to obtain a precursor solution, quickly adding a reducing agent, standing, and washing and drying the obtained product to obtain the high-entropy alloy aerogel catalyst, the inorganic salt is selected from five or more of copper salt, cobalt salt, iron salt, nickel salt, palladium salt, gold salt, ruthenium salt, platinum salt and silver salt. The three-dimensional continuous porous reticular high-entropy alloy aerogel is obtained through one-step reduction of the inorganic metal salt and standing assembly, the high-entropy alloy aerogel prepared through the method is high in reduction assembly speed, phase separation of multi-component alloy can be effectively inhibited, an amorphous alloy structure is obtained, and therefore when the high-entropy alloy aerogel is applied to ammonia production through electro-catalysis nitrate reduction, the high-entropy alloy aerogel can be used for preparing the high-entropy alloy aerogel. And excellent electrochemical activity and stability can be presented in an ultra-low overpotential range of-0.2 to + 0.2 V vs.RHE.

The invention discloses a nitrogen-doped carbon nanotube coated CoP / Co2P heterostructure electrocatalyst as well as a preparation method and application thereof, and belongs to the technical field of electrocatalytic materials. The preparation method comprises the following steps: by taking cobalt nitrate hexahydrate as a cobalt source and guanine as a carbon source and a nitrogen source, synthesizing a cobalt precursor by adopting a high-temperature carbonization method, then calcining the cobalt precursor to obtain a cobaltosic oxide precursor, and phosphating the cobaltosic oxide precursor to obtain the nitrogen-doped carbon nanotube coated CoP / Co2P heterostructure electrocatalyst. The catalyst has a relatively large specific surface area and multiple active sites, the specific surface area is 20-21m < 2 > / g, the pore size is distributed in a micropore-mesopore-macropore hierarchical pore structure, and the pore structure is mainly distributed in a range of 3-4nm. The preparation method of the catalyst comprises the following steps: (1) preparing a cobalt precursor; (2) preparing a cobaltosic oxide precursor; and (3) phosphating. The catalyst is high in catalytic reaction efficiency, and shows relatively good bifunctional activity and relatively strong stability in HER and OER.

The invention provides a platinum-palladium-based multi-component alloy sub-nanobelt catalyst as well as a preparation method and application thereof, and belongs to the technical field of nano material electro-catalysis. The element composition of the platinum-palladium-based multicomponent alloy sub-nanobelt catalyst disclosed by the invention is PtPdM, m is a non-noble metal, and the non-noble metal is one or more of Fe, Co, Ni, Ga and Zn; the preparation method comprises the following steps: ultrasonically mixing a metal precursor solution and a reduction solution to obtain a mixture, heating the mixture to react, centrifugally collecting a product, and calcining to obtain the platinum-palladium-based multicomponent alloy sub-nanobelt catalyst. The synthesis method disclosed by the invention is simple and controllable, and the obtained platinum-palladium-based multicomponent alloy sub-nanobelt catalyst has the characteristics of large specific surface area, rich active sites, low noble metal content and the like, and shows excellent oxygen reduction reaction catalytic performance in an acidic electrolyte.

The invention discloses a bimetallic / carbon nanotube compound modified glassy carbon electrode as well as a preparation method and application thereof, and belongs to the technical field of electrochemical analysis. The bimetallic / carbon nanotube compound modified glassy carbon electrode provided by the invention comprises a glassy carbon electrode substrate and a bimetallic / carbon nanotube compound compounded on the glassy carbon electrode substrate, the bimetallic / carbon nanotube compound is prepared from nickel-cobalt bimetallic nanoparticles and a multi-walled carbon nanotube. The prepared bimetallic / carbon nanotube compound modified glassy carbon electrode has excellent electrocatalytic activity, has the advantages of good stability, low detection limit and high sensitivity and selectivity in the process of determining paracetamol, can realize on-site rapid detection of paracetamol, has the advantages of being convenient to carry and simple to operate, and has a wide application prospect. Wide application prospects are realized in medicine safety and clinical medical treatment.

The invention relates to a preparation method and application of a thermal shock induced ferrocobalt double-doped metastable phase nickel / nickel oxide heterostructure (Co, Fe-Ni / NiO / NF) composite electrode. The preparation method comprises the following steps: cutting and cleaning the foamed nickel substrate; the preparation method comprises the following steps: growing a nickel-cobalt-iron layered double hydroxide nanosheet on a foamed nickel substrate through a constant-voltage deposition method; nickel-cobalt-iron prussian blue analogue nanoparticles grow in situ on the surface of the nickel-cobalt-iron layered double hydroxide nanosheet through an ion exchange method; and preparing the Co, Fe-Ni / NiO / NF composite electrode through a thermal shock method. The composite electrode has excellent catalytic activity and stability as a working electrode for hydrogen evolution and oxygen evolution reactions. The composite electrode can be directly used as a cathode and an anode of an anion-exchange membrane electrolytic cell to efficiently catalyze a full-water decomposition reaction at different temperatures, and the electrolytic cell can stably operate for 1000 hours and 240 hours under the current densities of 0.1 A cm <-2 > and 1.0 A cm <-2 > respectively, so that the composite electrode has a good application prospect.

The invention discloses a graphene composite high-entropy metal oxide coating titanium-based electrode as well as a preparation method and application thereof, and the preparation method of the graphene composite high-entropy metal oxide coating titanium-based electrode comprises the following steps: S1, pretreating a titanium substrate; s2, the pretreated titanium substrate is placed in an electro-deposition solution, wherein the electro-deposition solution is a mixed solution of a graphene oxide solution and a high-entropy metal salt solution; s3, the titanium substrate is used as an anode, a graphite electrode is used as a cathode, and electro-deposition is carried out on the titanium substrate; and S4, in the inert gas atmosphere, heat treatment is carried out on the titanium substrate deposited with the coating. The graphene composite high-entropy oxide is prepared through electro-deposition, the process is simple, and the preparation cost is low. When the prepared graphene composite high-entropy oxide coating titanium electrode is used for treating high-concentration wastewater with the COD ranging from 500 mg / L to 20000 mg / L, 85% or above of COD can be removed within 120 min, stability is excellent, and wide application prospects are achieved.

The invention discloses a preparation method of an efficient and stable TiNi alloy-based porous composite structure electro-catalysis electrode, and relates to a preparation method of an electro-catalysis electrode. The invention aims to solve the problem that the existing hydrogen evolution electro-catalysis electrode cannot simultaneously have high hydrogen production efficiency, low cost and excellent stable performance. The preparation method comprises the following steps: 1, pretreating the sodium metaaluminate pore-forming agent; 2, ball-milling and mixing; (3) preparing a porous TiNi-based alloy; and 4, compounding a catalytic active layer. The method is used for preparing the efficient and stable TiNi alloy-based porous composite structure electro-catalysis electrode.

A method for preparing a multi-carbon product by electrically reducing carbon dioxide relates to the technical field of energy catalysis and is carried out in a membrane electrode electrolytic tank, and self-assembled spherical copper nanoparticles with rough surfaces are used as a cathode catalyst. By introducing a mixed gas of carbon dioxide and water into the cathode side, the carbon dioxide is electrically reduced to prepare a multi-carbon product. By adjusting the moisture pressure, the catalytic performance is improved, and the problems of low selectivity and low stability under high current density are solved. Cuprous oxide and metal copper are adopted under the reaction potential, and high reaction activity and ethylene and ethanol selectivity are shown. Under the conditions that the water pressure is 2.7 kPa and the current density is 1.0 A # imgabs0 #, the Faraday efficiency of a multi-carbon product reaches 80%, the Faraday efficiency of ethylene reaches 58% at most, and an excellent carbon dioxide reduction effect is shown. The method is simple in preparation and easy to implement, and the catalyst is excellent in performance.

The invention provides a modified flow battery electrode capable of simultaneously improving activity and stability and a preparation method thereof.The method comprises the following steps that a carbon felt electrode material is added into a mixed solution of stannic chloride, manganous nitrate, melamine and urea, high-pressure treatment, ultrasonic cleaning and drying are conducted after magnetic stirring, and the modified electrode is obtained; adding the modified electrode into a mixed solution of nickel nitrate, melamine and urea, performing magnetic stirring, high-pressure treatment, ultrasonic cleaning and drying to obtain a modified electrode, immersing the modified electrode into a mixed solution of nickel nitrate, dopamine hydrochloride, polyamino acid, sodium citrate and ethanol, performing washing and drying, and then performing high-temperature treatment and pickling and drying to obtain an activated electrode; the voltage efficiency, the energy efficiency and the peak power density are greatly improved, the electrocatalytic activity of the flow battery is remarkably improved, and the stability of the electrode is also greatly improved while the electrocatalytic activity is improved.

The application discloses an electrolytic synthesis method of 3,6-dichloropicolinic acid, which comprises the following steps: S1, adopting a diaphragm electrolytic cell, taking an aqueous solution containing 3,4,5,6-tetrachloropicolinic acid and CO2 gas as the cathode liquid, taking an aqueous solution of alkali metal hydroxide as the anode liquid, taking a rhodium modified foam nickel electrode as the cathode, and taking a nickel-based material as the anode to perform an electrolytic reaction; and S2, after the reaction is completed, performing acid precipitation and filtration to obtain 3,6-dichloropicolinic acid. The cathode material is improved, the rhodium modified foam nickel electrode is used to replace the traditional silver mesh electrode, the three-dimensional porous structure of the foam nickel and the high catalytic activity of rhodium are utilized, the electrolytic efficiency is improved, the energy consumption is reduced, and meanwhile, the high product yield is maintained.

A method and application of CO2 laser-induced synthesis of jujube-shaped heterostructure electrocatalysts, after mixing a sulfur source and distilled water, adding a cobalt source, sodium citrate and a tin source, stirring evenly, the sulfur source is L-cysteine, ammonium thiocyanate, thiourea or sulfur powder, the cobalt source is hexahydrated cobalt nitrate, cobalt chloride and cobalt acetylacetonate, the tin source is stannous chloride, tin tetrachloride or stannous sulfate, hydrothermally reacting in a stainless steel autoclave, washing, centrifuging, vacuum drying at room temperature, obtaining an electrocatalyst precursor; grinding the electrocatalyst precursor into powder, evenly paving, and inducing CO2 laser in an air atmosphere; cooling to room temperature, washing, drying and grinding into powder to obtain a jujube-shaped heterostructure CoS / SnO2@C electrocatalyst. Advantages: simple synthesis, short time consumption, low energy consumption, good dispersibility, excellent ORR and OER electrocatalytic performance, can be used to prepare cathode electrocatalysts for lithium oxygen batteries.

This invention discloses a method for preparing and applying a sodium borohydride-modified self-supporting anode for AEM water electrolyzers. Firstly, an amorphous ternary metal hydroxyl oxide precursor is grown in situ on a nickel substrate via room temperature liquid phase deposition. The process involves the presence of Co in solution. 2+ Fe 3+ Ni ions are introduced through slight corrosion of the nickel foam matrix. 2+ The ions, the three, and the OH- produced by hydrolysis ⁻ Co-deposition occurs under the influence of dissolved oxygen, leading to the self-assembly of amorphous nanosheet structures on the substrate surface. Subsequently, a mild chemical reduction treatment with sodium borohydride solution is used to obtain a structurally stable and high-performance self-supporting electrode. The method described in this embodiment is mild, simple, low-cost, and has good versatility.

The present invention relates to an energy-saving high-strength fence-type composite anode plate for nonferrous metal electrowinning and a preparation method thereof, and belongs to the technical field of nonferrous metallurgy. The composite anode plate of the present invention comprises an aluminum conductive beam, a copper-aluminum composite conductive head is fixedly arranged at the end of the aluminum conductive beam, a fence-type aluminum-based composite anode plate bracket is fixedly arranged at the bottom end of the aluminum conductive beam, and a plurality of horizontal conductive reinforcing ribs are fixedly arranged along the longitudinal direction on the fence-type aluminum-based composite anode plate bracket, and both sides of the fence-type aluminum-based composite anode plate bracket are covered with insulating sheaths, and the two ends of the conductive reinforcing ribs are arranged in the insulating sheaths; the fence-type aluminum-based composite anode plate bracket is composed of a plurality of parallel anode composite rods, and the anode composite rods include aluminum alloy rods, transition layers, lead-bismuth-antimony / rare earth-nano cobalt composite layers, and aluminum-titanium-boron particle surface-coated lead-silver composite coatings from the inside to the outside; wherein the transition layers include zinc layers, copper layers, and lead-tin-rare earth composite layers from the inside to the outside.

The present invention discloses a method for preparing an atomic-level dispersed metal nitrogen-carbon composite material with axial coordination based on a carrier metal oxide. The formed atomic-level dispersed metal atoms, in addition to the planar nitrogen coordination in the carbon layer, also form an axial oxygen coordination perpendicular to the planar coordination structure with the dangling oxygen on the surface of the carrier metal oxide. The preparation method comprises: adding an active metal salt and a carrier metal oxide to a formamide solvent in a certain proportion, stirring and ultrasonicating until the solution is uniformly dispersed; transferring the precursor solution to a reactor, setting the reaction temperature and duration; washing, centrifuging, and drying the solvent thermal reaction product; placing it in a tubular furnace for high-temperature roasting under the protection of an inert gas; and then obtaining the composite material of the present invention. The present invention has low raw material cost, simple preparation process, and high preparation efficiency. The composite material has excellent electrochemical catalytic activity and stability, and can be applied to fuel cells and metal-air battery cathode oxygen reduction reactions.

The invention relates to the technical field of electrocatalysis, in particular to an oxygen / sulfur heterostructure oxygen evolution electrocatalyst and a preparation method and application thereof. Based on an in-situ oxidation strategy, a CuFeO layer is generated on the surface of CuFeS, and the CuFeS-coated CuFeO high-performance oxygen evolution electrocatalyst with a heterostructure is obtained. By constructing a sulfide-oxide heterojunction, a built-in electric field can be formed at an interface to promote charge separation and transfer, so that the electrocatalytic activity is remarkably improved. And on the other hand, the CuFeO layer on the outer layer serves as an armor, and the problem of oxidation of the surface of CuFeS is solved. The electro-catalytic performance and the long-term stability are obviously improved.

The invention discloses preparation and application of a sandwich type ZnNi-MOF electrochemical immunosensor, and relates to the field of electrochemical immunosensors, and the preparation method of the sandwich type ZnNi-MOF electrochemical immunosensor comprises the following steps: dropwise adding a biotin Ab1 solution on CeO2-Pt / streptavidin modified GCE, incubating, soaking with BSA, incubating with CA15-3 in sequence, and finally, carrying out electrochemical detection on the surface of the sandwich type ZnNi-MOF electrochemical immunosensor, so as to obtain the sandwich type ZnNi-MOF electrochemical immunosensor. And incubating the obtained electrode with a ZnNi-MOF / PEI-L012 (at) Ab2 biological conjugate, so as to obtain the sandwich type ZnNi-MOF electrochemical immunosensor. According to the present invention, the combination of ZnNi-MOF / PEI-L012 (at) Ab2 and CeO2-Pt (at) Ab1 is adopted to construct a signal opening immunosensing platform, the immunosensing platform can be used for high-sensitivity specific detection of the breast cancer marker CA15-3, and the detection limit is as low as 5.75 * 10 <-5 > U m <-1 >.

The application discloses a sludge resource utilization method and application thereof. The sludge resource utilization method comprises the following steps: performing electro-fermentation treatment on sludge to be fermented in an anode chamber of an electrolytic cell; and the anode electrode in the anode chamber comprises a carbon-based material modified by titanium oxide. The anode electrode of the electrolytic cell comprises the carbon-based material modified by titanium oxide, the hydrophilicity of the surface of activated carbon particles can be significantly improved by modifying the carbon material by titanium oxide, the biocompatibility and electrocatalytic activity of the material are improved, the growth of microorganisms is facilitated, the anaerobic fermentation speed of bacteria can be improved, the electro-fermentation process speed and treatment effect are optimized and improved, and the effective recovery of elements such as nitrogen, iron and phosphorus contained in the sludge is realized, so that the application prospect is good.

The invention relates to application of a charcoal-based monatomic iron catalyst in a microbial fuel cell. The charcoal-based monatomic iron catalyst is used as an active component of a cathode catalyst layer of the microbial fuel cell. The biochar-based monatomic iron catalyst is prepared by the following method: performing first high-temperature oxygen-limited pyrolysis on biogas residue powder to obtain biogas residue biochar; mixing the biogas residue biochar with a pore-enlarging agent, and carrying out second high-temperature oxygen-limited pyrolysis to obtain porous biogas residue biochar; mixing ferric salt with a chelating agent to obtain a complex, mixing the complex with the porous biogas residue charcoal, and drying; and uniformly mixing the dried powder with a cyanamide compound, and performing high-temperature pyrolysis to finally obtain the charcoal-based monatomic iron catalyst. Compared with the prior art, the biochar-based monatomic iron catalyst prepared by the invention has better electrocatalytic activity, and has wide application prospects in the fields of microbial fuel cells and other electrochemical catalysis.

The invention discloses an HER electrocatalyst with a porous heterostructure and a preparation method of the HER electrocatalyst, and belongs to the field of HER electrocatalysts.The preparation method comprises the following steps that cobalt nitrate hexahydrate, urea, foamed nickel and ruthenium chloride serve as raw materials, and a Ru-doped basic cobalt carbonate nanowire array is prepared through a solvothermal method; the Ru doped basic cobalt carbonate nanowire array is heated in a muffle furnace, and a RuO2 / Co3O4 nanowire array is obtained; the RuO2 / Co3O4 nanowire array and NaH2PO2 are placed in a crucible, annealing and phosphorization are carried out in nitrogen gas flow, a RuO2 / CoxP / Co3O4 nanowire array is obtained, then acid pickling is carried out to remove Co3O4, the RuO2 / CoxP nanowire array is obtained, and the HER electrocatalyst with the porous heterostructure is obtained.

The present invention discloses a preparation method and application of a highly dispersed cobalt-modified nitrogen-sulfur co-doped hierarchical porous carbon composite material, belonging to the technical field of electrocatalytic materials. The preparation method comprises the following steps: sulfation-modifying chitosan to obtain positioned sulfonated chitosan; adding the positioned sulfonated chitosan to a Ca-containing 2+ and Co 2+ The method comprises the following steps: stirring the mixture evenly in a solution of 200 μm and 30 μm, aging the mixture to obtain a positioning chitosan sulfonate mixture; calcining the positioning chitosan sulfonate mixture under an inert atmosphere, and acid leaching the calcined product to obtain the highly dispersed cobalt-modified nitrogen-sulfur co-doped hierarchical porous carbon composite material. The highly dispersed cobalt-modified nitrogen-sulfur co-doped hierarchical porous carbon composite material provided by the present invention has a simple preparation process, good electrocatalytic activity and stability, and can be used as an electrocatalyst for secondary zinc-air batteries.

The invention relates to the technical field of energy materials, and discloses a self-assembled low-crystallinity nano-flower-shaped polyoxometalate catalyst, a preparation method and application thereof. The preparation method comprises: firstly using cobalt nitrate hexahydrate, iron nitrate nonahydrate, CH4N2O and Finke Co raw materials, in situ reacting Finke Co and Fe 3+ The catalyst is grown on nickel foam and then reacted with ZIF-67 (Co) to prepare a structurally stable Finke Co-FeCoNi precursor; finally, the precursor is sulfurized to obtain a nano-flower-shaped polyoxometalate catalyst Finke Co-FeCoNi / S. The present invention reduces the crystallinity of the catalyst material by adding Finke Co and assembles it into a nano-flower-shaped structure, wherein the low crystallinity can provide more coordinated unsaturated sites and improve the conductivity, and the nano-flower-shaped morphology exposes more defect sites, thereby increasing the reaction contact area and improving the catalytic activity.

The application relates to an ionic liquid modified Cu-based bimetal electrode material and a preparation method and application thereof, and belongs to the technical field of material preparation. The method uses an in-situ reduction method to prepare the ionic liquid modified Cu-based bimetal electrode material, and the specific steps are as follows: copper salt and lanthanide chloride are dissolved in deionized water, and then ionic liquid is added after mixing; the mixture is stirred for 30 minutes under ice bath conditions. The above solution is slowly dropped into a sodium borohydride aqueous solution, the precipitate is extracted and filtered after the reaction is completed, the precipitate is washed with ethanol and water alternately for several times, and then the black solid is obtained after drying. The black solid is ultrasonically dispersed in a mixed solution of Nafion and isopropanol, then the dispersion liquid is uniformly coated on a gas diffusion electrode, and the electrode is pre-activated by a cyclic voltammetry method in a carbon dioxide-saturated electrolyte, so that the ionic liquid modified Cu-based bimetal electrode material is obtained. The electrode can be used as a high-efficiency electrode material to realize the conversion of carbon dioxide into ethylene under mild conditions. The Cu-based electrode material synthesis method has the characteristics of simple process and low cost, and is suitable for large-scale production and application.

The invention discloses a nickel-based monatomic catalyst suitable for a glucose electrochemical sensor and preparation and application of the nickel-based monatomic catalyst. Bis (cyclopentadiene) nickel (II), melamine and a carbon-based nano material are mixed and ground uniformly, the mixture is dissolved in an organic solvent and magnetically stirred, and suspension passes through a rotary evaporator to obtain powder; and putting the obtained powder into a tubular furnace, calcining in non-reactive gas, acidizing and etching the obtained product by using an acid solution, and then centrifuging, washing and drying in vacuum to obtain the nickel-based monatomic catalyst. According to the nickel-based monatomic catalyst, nickel monatomic is attached to a carbon tube through the synergistic effect of nickel and nitrogen-doped carbon, the nickel-based monatomic catalyst has rich redox active sites, and reaction kinetics and electrocatalytic activity are enhanced. In glucose detection, the nickel-based monatomic catalyst material shows the sensitivity of 546.86 [mu] A / (mM.cm < 2 >), the detection limit of 0.24 [mu] M and the linear response range of 0.1-10 mM. The nickel-based monatomic catalyst provided by the invention has relatively high electrocatalytic activity, excellent selectivity, simple preparation method and low cost, and is suitable for large-scale production.

The invention discloses a preparation method and application of a sulfur passivation-resistant coupled energy-saving hydrogen production difunctional electrocatalyst, and relates to the technical field of preparation of energy-saving hydrogen production electrocatalysts, and the preparation method comprises the following steps: pretreatment of foamed nickel, hydrothermal reduction preparation of a MoSe2 / NiSex / NF catalyst, and coupled application of SOR and HER. According to the preparation method, a porous network and a multi-dimensional electron transfer path which are mutually connected in foamed nickel are utilized, and a high-temperature and high-pressure hydrothermal reduction method is adopted to anchor and grow a mixed phase component on a conductive substrate foamed nickel framework, so that effective compounding of multi-phase components is realized, and mass transfer and charge transfer are enhanced; the conductivity and the electrocatalytic activity are further improved; the prepared MoSe2 / NiSex / NF not only has the sulfur phobic characteristic, but also has selectivity on S < 2-> conversion, so that a polysulfide product instead of elemental sulfur is generated in the electrooxidation process, and the electrocatalytic activity of the MoSe2 / NiSex / NF in the long-term SOR process is maintained, thereby preparing the difunctional electrocatalyst with good conductivity, high catalytic activity and sulfur passivation resistance.

This invention discloses the application of an electrode material for reducing intracellular resistance genes in drug-resistant bacteria. A platinum-doped dendritic TiO2 nanowire structure based on a three-dimensional material is formed by growing a micron-sized TiO2 backbone array and platinum-doped nano-sized TiO2 branches on the surface of a porous electrode. The prepared dendritic nanowire three-dimensional electrode material has a larger specific surface area, providing more reactive sites and strong electric field sites. Platinum doping enhances the conductivity and electrocatalytic performance of the nanowires. Furthermore, by combining it with chloride salts / oxidants, the electroporation and electrocatalysis of the nanowire electrode surface are coupled. The strong electric field confined at the nanowire tip induces perforation of the drug-resistant bacterial cell structure, strengthening the contact and reaction between the oxidant and the resistance gene. The high electrocatalytic activity confined at the nanowire tip induces the generation of strong oxidizing free radicals, achieving the goal of destroying the drug-resistant bacterial cell structure and efficiently reducing intracellular resistance genes.

The application discloses a manganese monatomic carbon-based electrocatalyst with a core-shell structure and a preparation method and application thereof. A solvent thermal reaction is carried out by adding manganese nitrate solution and 1H-1,2,3 triazole into N,N dimethylformamide solvent, and MET-2 mixed dicyandiamide prepared through the solvent thermal reaction is pyrolyzed in a vacuum environment. In the application, dicyandiamide is first heat-induced polymerized on the surface of MET-2 crystals to generate a graphene-like shell, and then gas molecules generated in the pyrolysis process can adjust the pore structure. The manganese monatomic carbon-based electrocatalyst with the core-shell structure prepared through the method has more excellent ORR activity than a Pt / C catalyst, and when the manganese monatomic carbon-based electrocatalyst is applied to a zinc-air battery, the zinc-air battery has higher energy density and stability than a zinc-air battery assembled by the Pt / C.

The application relates to a preparation method of an entropy-based oxide catalyst with high metallic property and application of the entropy-based oxide catalyst in hydrogen production by acidic electrolytic water, and belongs to the field of catalysis. A water-soluble salt containing at least Ru, Ir and A is uniformly mixed, hydrolyzed and reduced under water bath stirring condition by taking zinc oxide as a carrier and a sodium borohydride solution as a reducing agent, then the black powder of the medium-entropy alloy is formed through filtration, washing and drying, and finally the black powder is subjected to rapid incomplete oxidation under the condition of 300-500 DEG C and air atmosphere, and then is subjected to acid pickling, filtration, washing and drying to prepare the entropy-based oxide catalyst with high metallic property. The catalyst contains a large amount of Ir-Ir metal bonds and / or Ir-Ru metal bonds, and the proportion can reach 30%-40%. The mismatch between the metal atom fingerprint structure and the metal-oxygen atom coordination structure causes serious lattice distortion, induces unbalanced distribution of stress and strain, and promotes the kinetics of the acidic oxygen evolution reaction.