616 results about "Oxygen reduction reaction" patented technology

The invention belongs to the technical field of fuel cell non-noble metal catalyst material preparation, and particularly relates to a composite carbon nanofiber catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, combining metal ions with an organic ligand in an organic solvent at room temperature to successfully prepare a zeolite imidazate framework material (ZIFs); the preparation method comprises the following steps: carrying out primary carbonization on a prepared ZIFs material in an inert atmosphere high-temperature furnace to obtain a metal nitrogen carbon material, then uniformly mixing the metal nitrogen carbon material with a spinning solution, carrying out electrostatic spinning to obtain composite nanofibers, and then carrying out secondary carbonization in an inert atmosphere to finally successfully prepare the composite carbon nanofiber catalyst (MN-CNF). The catalyst has excellent electrocatalytic activity, can effectively improve the efficiency of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), and also has excellent catalytic stability.

The invention provides a platinum-based alloy catalyst, a preparation method thereof and a fuel cell. The method comprises the following steps: carrying out reduced pressure ball milling treatment on a non-metallic element doped carrier material, a platinum-based precursor and a transition metal-based precursor to obtain a platinum-based alloy catalyst precursor material; and carrying out reduction calcination treatment on the platinum-based alloy catalyst precursor material to obtain the platinum-based alloy catalyst. According to the preparation method, the platinum-based alloy catalyst with controllable particle size, good oxygen reduction reaction (ORR) performance and stability can be prepared without using an organic solvent by adopting a method of combining reduced pressure ball milling and reduction calcination treatment.

The invention belongs to the technical field of chemical catalysis, and particularly relates to a preparation method of an alkali metal cation modified cobalt-nitrogen-carbon monatomic catalyst and application of the catalyst in electrosynthesis of hydrogen peroxide. The Co-N-C / X catalyst is obtained by taking a cobalt-containing compound as a metal source, mixing the metal source with a nitrogen-containing organic matter and a carbon material, performing rotary evaporation, grinding and high-temperature pyrolysis in an inert atmosphere, performing acid washing with strong acid to construct surface defects, and finally performing stirring adsorption with an alkali metal salt solution, suction filtration and drying. Alkali metal cations are physically adsorbed and anchored on the surface and interface of the Co-N-C catalyst instead of being dissolved in a solution, so that the electronic structure of Co active sites and the adsorption energy of the * OOH intermediate are optimized, and the problem of separation of alkali metal and a product is solved. When the catalyst is used for electro-catalytic oxygen reduction reaction, the H2O2 selectivity reaches up to 98%, the preparation process is simple, the cost is low, large-scale production can be realized, and the problems that the traditional method is high in energy consumption and large in pollution and the existing catalyst is insufficient in selectivity are solved.

The invention discloses a nitrogen-doped carbon material composite tin-antimony alloy oxygen reduction reaction catalyst. The nitrogen-doped carbon material composite tin-antimony alloy oxygen reduction reaction catalyst comprises a nitrogen-doped carbon material carrier and tin-antimony alloy particles uniformly loaded on the surface and inside of the nitrogen-doped carbon material carrier. The preparation method comprises the following steps: S1, dissolving a precursor of a nitrogen-containing carbon material in an organic solvent to obtain a precursor solution; s2, adding a template agent into the precursor solution until the template agent is completely dispersed, then adding soluble salt of tin and soluble salt of antimony, and uniformly stirring to obtain a raw material solution; and S3, carrying out freeze drying treatment on the raw material solution, then introducing the raw material solution into a reducing atmosphere, carrying out high-temperature calcination treatment, and then carrying out washing treatment to remove the template agent. The invention discloses a nitrogen-doped carbon material composite tin-antimony alloy oxygen reduction reaction catalyst which is novel in composition, has a good pore structure and a high specific surface area, and not only has excellent oxygen reduction reaction catalytic activity, but also has relatively high stability.

The invention discloses a flowing type vanadium-based electric fuel energy storage and supply system which comprises an electric pile reaction module, an electrolyte driving module and a medium storage module, and the electric pile reaction module comprises an oxygen evolution reaction flowing unit, a vanadium electrolyte flowing unit and an oxygen reduction reaction flowing unit which are arranged adjacently in pairs; a first flow field plate in the oxygen evolution reaction flow unit is provided with a bionic dendritic interdigital first flow channel; a second flow field plate in the vanadium electrolyte flowing unit is provided with a bidirectional spiral interdigital second flow channel; a third flow field plate in the oxygen reduction reaction flow unit is provided with a third multi-stage fractal interdigital flow channel; the medium storage module comprises a vanadium electrolyte storage tank and a reaction medium storage tank, the vanadium electrolyte storage tank and the reaction medium storage tank are arranged on the two opposite sides of the galvanic pile reaction module, the vanadium electrolyte storage tank is connected with the second flow field plate, and the reaction medium storage tank is connected with the second flow field plate and the third flow field plate. According to the system, the integration level of the system is improved on the basis of reducing the cost.

The invention relates to a cathode material of a medium-temperature solid oxide fuel cell as well as a preparation method and application thereof, and belongs to the technical field of fuel cells. The cathode material comprises a cathode material body and a doped coating layer, the cathode material body comprises a perovskite material, and the doped coating layer material comprises platinum; by doping and coating platinum on the surface of the cathode material body, the electronic structure of the material surface is improved, the electronic conductivity is improved, and the transmission of electrons on the surface is smoother. Platinum provides a large number of efficient oxygen reduction reaction active sites on the surface of the cathode material body, and platinum has a unique electronic structure, so that the adsorption and dissociation processes of oxygen molecules can be greatly accelerated, the activation energy of the oxygen reduction reaction is remarkably reduced, and the catalytic activity of the whole cathode material is greatly improved. And meanwhile, platinum on the surface of the cathode material body forms a stable protection layer in a medium-temperature environment, so that the problems of oxidation, corrosion and the like on the surface of the material are effectively prevented, the chemical and structural stability of the surface is maintained, and the service life of the material is prolonged.

The present invention generally relates to a process for synthesizing a graphene oxide quantum dots-iron phthalocyanine (FePc-GOQDs) nanocomposite with enhanced electrochemical properties, particularly for oxygen reduction reactions (ORR). The process begins by dispersing 500 mg of graphene oxide (GO) in a hydrogen peroxide and deionized water solution in a 1:10 volume ratio, followed by hydrothermal treatment at 180° C. for 8 hours to produce GO quantum dots (GOQDs). The resulting material is freeze-dried to obtain GOQDs powder. Subsequently, 60 mg of GOQDs are combined with 10 mg of iron phthalocyanine (FePc) and 20 mL of dimethyl sulfoxide (DMSO), and the mixture is subjected to microwave irradiation at 500 W and 150° C. for 30 minutes. The resulting composite is rinsed repeatedly with deionized water and ethanol, then dried at 120° C. to yield the FePc-GOQDs nanocomposite. This composite demonstrates superior ORR performance due to strong Fe—O bonding and optimized electronic interactions.

The invention discloses a preparation method of Ni / S co-doped hollow carbon spheres for producing H2O2 through efficient electro-catalysis ORR. The preparation method comprises the following specific steps: dispersing polystyrene microspheres, nickel nitrate hexahydrate, thiosemicarbazide and dopamine hydrochloride into a tris (hydroxymethyl) aminomethane buffer solution to obtain a mixed solution; performing centrifugation, washing, drying and drying treatment to obtain precursor powder; and carrying out high-temperature calcination on the precursor under the protection of N2, cooling to room temperature, and carrying out acid leaching, water washing and drying on the product to obtain the Ni / S co-doped hollow carbon spheres. Benefited from the regulation and control effect of doped S on an Ni atom electronic structure and the synergistic effect of a hollow structure with a high specific surface area, the Ni / S co-doped hollow carbon sphere has extremely high H2O2 selectivity and excellent catalytic activity in an alkaline 2e-ORR process, and shows high H2O2 yield and Faraday efficiency in an electrocatalytic H2O2 production test.

The invention belongs to the technical field of catalysts, and discloses a rare earth platinum alloy catalyst and a preparation method and application thereof. The catalyst comprises a nitrogen-doped carbon carrier, and a PtGd alloy and a Ni elementary substance are loaded on the nitrogen-doped carbon carrier. The preparation method comprises the following steps: (1) preparing a Gd-ZIF material; and (2) uniformly mixing the Gd-ZIF, the platinum source solution and the nickel source solution, carrying out vacuum drying treatment, heating to 700-1000 DEG C in a reducing atmosphere, keeping the temperature for 1-2 hours, and cooling to room temperature to obtain the rare earth platinum alloy catalyst. The invention discloses application of a rare earth platinum alloy catalyst which is used as a cathode oxygen reduction reaction catalyst of a hydrogen fuel cell. The preparation method disclosed by the invention is simple to operate and can be used for large-scale preparation; the Pt content of the rare earth platinum alloy catalyst prepared by the method is reduced to 13%, and the cost of raw materials is directly and greatly reduced; the maximum half-wave potential of the rare earth platinum alloy catalyst can reach 0.93 V vs.RHE which is far higher than that of commercial Pt / C.

The invention relates to the technical field of preparation of binuclear cobalt complexes, in particular to a binuclear cobalt complex as well as a preparation method and application thereof. The molecular formula of the binuclear cobalt complex is Co2 (L1) 2X2, the binuclear cobalt complex is composed of two L12-groups, two trivalent cobalt and two X-ions, and X is Cl or OH. The binuclear cobalt complex Co2 (L1) 2Cl2 belongs to a triclinic system, belongs to a P-1 space group, and is a chlorine-bridged binuclear cobalt complex. The binuclear cobalt complex Co2 (L1) 2 (OH) 2 belongs to a monoclinic system, belongs to a P21 / n space group, and is an oxyhydrogen bridging binuclear cobalt complex. The preparation method of the two binuclear cobalt complexes is simple, the cost is lower than that of precious metal, the stability and the selectivity are good, and the binuclear cobalt complexes have certain electrocatalytic oxygen reduction reaction performance.

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 provides a topological chiral semimetal catalyst for oxygen electrocatalysis and a preparation method and application thereof.The topological chiral semimetal catalyst is a supported catalyst and comprises a carrier, an active component and guest metal, the carrier is selected from one of Vulcan XC-72R, Vulcan XC-72, Ketjenblack and carbon nanotubes, the active component is Pt, and the guest metal is selected from one of Vulcan XC-72R, Vulcan XC-72, Ketjenblack and carbon nanotubes. The invention discloses a topological chiral semi-metal material with a space group of P213, the topological chiral semi-metal material comprises an active component and a guest metal, the active component is a carrier, the dispersion size of the active component in the carrier is 2-4 nm, the guest metal is selected from one or two of Ga, Al, Ba, Ge, Bi, Sb, Eu, Fe, Cr, Sr and Mg, and compared with the prior art, the topological chiral semi-metal material (PtGa, PtMg, PtAl, BaGePt, BiTePt, BiSbPt, EuGePt, FeSbPt, CrSbPt and SrGePt) with the space group of P213 shows excellent performance in the oxygen reduction reaction of a fuel cell cathode. Compared with the current advanced PtC catalyst, the precious metal content is low, the stability is good, the yield of the by-product H2O2 is only 0.5%, and the PtC catalyst has a good application prospect in oxygen electro-catalysis.

The invention provides a zinc-air battery catalyst and a preparation method thereof, a structural unit of the zinc-air battery catalyst takes a nitrogen-doped carbon nanotube as a conductive network, and a nitrogen-doped ferrocobalt selenide nanosheet is loaded on the nitrogen-doped carbon nanotube. The preparation method comprises the following steps: synthesizing a hollow polypyrrole nanotube, and carrying out dielectric barrier discharge surface modification treatment on the hollow polypyrrole nanotube, so that cobalt ions and TCPP (Fe) are effectively adsorbed, and the growth of a Co-TCPP (Fe) nanosheet on the surface of the hollow polypyrrole nanotube is realized; the preparation method comprises the following steps: mixing cobalt ions, ferriporphyrin and a polypyrrole nanotube through a solution to generate a Co-TCPP (Fe) (at) p-PPy composite material; the Co-TCPP (Fe) (at) p-PPy composite material is subjected to high-temperature roasting to obtain CoFe (at) NC (at) NCNTs, and finally, the CoFe (at) NC (at) NCNTs are subjected to selenylation treatment to obtain N-CoFeSe2 (at) NC (at) NCNTs. According to the present invention, with the application of the catalyst in the catalysis of the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) of the zinc air battery, the surface activity and the conductivity of the catalyst can be significantly improved, the excellent OER and ORR performance can be represented, and the commercial application requirement can be met.

A technology for preparing glutaraldehyde through cyclopentene oxidation belongs to the technical field of organic synthesis, glutaraldehyde is prepared through cyclopentene oxidation by adopting a photocatalysis-electrocatalysis synergistic catalyst g-C3N4 / TiO2 (at) Au-Co / N-G. The catalyst is of a unique core-shell structure, is stable in property, promotes an oxygen reduction reaction in a catalysis technology, and has good catalytic activity. The conversion rate of cyclopentene and the selectivity of glutaraldehyde are remarkably improved, and the effect is remarkable.

The invention provides a method for preparing a nitrogen, phosphorus and sulfur tri-doped hollow carbon nanocage material derived from a covalent triazine polymer. The method comprises the following steps: by taking zinc nitrate hexahydrate and 2-methylimidazole as reactants and methanol as a solvent, stirring at room temperature to synthesize ZIF-8; the preparation method comprises the following steps: by taking phosphonitrilic chloride trimer and bisphenol S as monomers and ZIF-8 as a template agent, carrying out polymerization under the induction of an N, N-diisopropylethylamine initiator so as to generate ZIF-8 (at) PZS; and performing high-temperature pyrolysis to synthesize the nitrogen, phosphorus and sulfur triple-doped hollow carbon nanocage material. The invention also discusses the application of the nitrogen, phosphorus and sulfur tri-doped hollow carbon nanocage material in an air electrode material of a zinc-air battery. Meanwhile, the conductivity and the oxygen reduction reaction electro-catalytic performance of the obtained carbon material are remarkably improved through the nitrogen, phosphorus and sulfur doped synergistic effect, the half-wave potential of the carbon material reaches up to 0.85 V vs. RHE, and the limiting current density can reach 5.19 mA cm. A zinc-air battery assembled by using the material as an air electrode shows high peak power density of 194 mW cm.

The invention belongs to the technical field of percarbamide preparation, and particularly relates to a method and a device for synthesizing percarbamide through electrochemical in-situ extraction of urea in urine. Comprising the following steps: by taking a carbon-based catalyst as a working electrode, a metal active material as an anode and concentrated urine as an electrolyte solution, continuously introducing oxygen into the electrolyte solution, carrying out electrochemical in-situ extraction synthesis under constant voltage, and combining urea molecules with an oxidation intermediate adsorbed on the surface of the carbon-based catalyst, so as to obtain a urea compound; the percarbamide is generated through protonation, and urea in the urine is converted into the percarbamide. On the basis of an electrochemical technology, urea in urine is converted into percarbamide in situ, the conversion process is based on ingenious combination of an electrochemical oxygen reduction reaction and a urea conversion reaction, efficient combination of urea and * OOH is achieved, high-purity solid percarbamide is generated, efficient separation and conversion of urea are achieved under the condition of low energy consumption, and the method is suitable for industrial production. The complex operation of the traditional process is avoided.

The present disclosure relates to an air electrode for a metal-air battery including a cobalt-manganese heterostructure, a metal-air battery including the same, and a method of preparing the cobalt-manganese heterostructure. A cobalt-manganese heterostructure according to embodiments of the present disclosure exhibits excellent oxygen reduction reaction (ORR) activity and durability as well as superior oxygen evolution reaction (OER) performances including a high current density to RuO2 OER catalysts.

The invention relates to a platinum-zinc alloy supported nitrogen-doped porous multi-layer carbon material and preparation and application thereof, the carbon material takes a rod-like graded porous carbon nanomaterial as a carrier, and platinum-zinc alloy particles and zinc monatomic are jointly supported on the surface of the carrier; the preparation method comprises the following steps: S1, adding zinc acetate and hexadecyl trimethyl ammonium bromide into DMF (Dimethyl Formamide), carrying out ultrasonic treatment, adding into a polyacrylonitrile solution, and stirring; s2, performing electrostatic spinning on the obtained spinning precursor solution; s3, adding the obtained nanofiber into a zinc acetate dihydrate solution, then adding a dimethylimidazole solution, carrying out hydrothermal reaction, soaking the obtained product in a chloroplatinic acid methanol solution, and then carrying out freeze drying; and S4, heating carbonization is carried out under the protection of an inert atmosphere, then annealing and cooling are carried out, and the PtZn-Zn-N4-HPCNFs material is obtained. Compared with the prior art, the catalytic performance and the like in the reaction processes of oxygen reduction reaction (ORR), chlorine evolution reaction (CER) and the like can be effectively improved.

The present invention relates to a battery comprising an electrochemical cell for electrical energy storage (EES), which is capable of operating in an electrical energy delivery mode in which it generates electrical energy by oxidation of a redox active species and reduction of oxygen in an oxygen reduction reaction (ORR) and eventually in an electrical energy storage mode in which it consumes electrical energy to reduce a redox active species and generates oxygen in an oxygen evolution reaction (OER), wherein the electrochemical cell is a hybrid redox flow cell comprising a negative half-cell (1), a positive half-cell (2), a negolyte (3A) with a polyoxometalate (POM) as redox active species in the negative half-cell (1), a membrane (4) disposed between the negative half-cell (1) and the positive half-cell (2), a negative electrode (5) in the negative half-cell (1), a positive electrode (6) in the positive half-cell (2), characterised in that the polyoxometalate (POM) is capable of multiple electron transfer, an inlet (7) and an outlet (8) connect the negative half-cell (1) with an electrolyte tank (9) via conduits (10) equipped with a pump (11), so that the battery may be charged by provisioning the tank (9) with charged negolyte, or recharged by replacing discharged negolyte with charged negolyte, the positive electrode (6) is equipped with an oxygen reduction reaction (ORR) and eventually an oxygen evolution reaction (OER) catalyst or with a bifunctional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER).

The invention provides a residual oil derived nitrogen-doped carbon loaded small-size intermetallic compound catalyst. The residual oil derived nitrogen-doped carbon loaded small-size intermetallic compound catalyst comprises residual oil derived nitrogen-doped mesoporous carbon and an intermetallic compound loaded on the surface of the nitrogen-doped mesoporous carbon. The prepared residual oil derived nitrogen-doped mesoporous carbon with the carbon-rich network structure has rich pi sites, and a platinum-based binary intermetallic compound is loaded on the residual oil derived nitrogen-doped mesoporous carbon by a simple impregnation reduction method. The residual oil derived nitrogen-doped mesoporous carbon and a PtxMy intermetallic compound (M is Co, Fe and Cu) form a Pt-C bond, and the residual oil derived nitrogen-doped mesoporous carbon has a strong anchoring effect and an electron transfer effect on metal. The average size of intermetallic compounds in the catalyst is 2.5-5nm, and the catalyst has high platinum utilization rate and shows excellent activity and stability when applied to oxygen reduction reaction (ORR).

The invention relates to a lithium ion conductive dense membrane and a preparation method and application thereof. The lithium ion conductive dense membrane comprises a polymer base membrane, ion conductive inorganic particles and a polymer solid electrolyte, the polymer base membrane is of a net structure; the Gurley value of the lithium ion conductive dense film is larger than or equal to 1000, and the porosity is smaller than or equal to 5%. The lithium ion conductive dense membrane provided by the invention has the advantages of high lithium ion conductivity, high transport efficiency and high lithium ion selectivity, and can be applied to electrodialysis lithium extraction. And under the action of external voltage, lithium ions are directionally migrated to the air negative electrode subjected to oxygen reduction reaction through the lithium ion conductive dense membrane to form a lithium hydroxide solution, and other metal hetero-ions are isolated on the positive electrode side by the lithium ion conductive dense membrane, so that lithium enrichment is realized. And meanwhile, transportation of the membrane to lithium ions does not depend on pores in the conductive membrane, so that the service life can be prolonged while the lithium ion separability and the transportation efficiency of the salt lake lithium extraction method are improved.

The invention discloses a layered structure solid oxide fuel cell composite cathode catalyst as well as a preparation method and application thereof, and belongs to the field of solid oxide fuel cells. The invention aims to solve the problem that the electro-catalytic performance and low-oxygen reduction reaction activation energy of the existing medium-temperature solid oxide fuel cell are poor. The Sr2. 9Ca0. 1Fe2O7-CuO composite cathode catalyst is prepared by adopting a sol-gel method and a solid phase method, the components in a sol-gel system are in a nanometer range, the reaction is easier to carry out, the reaction temperature is low, the prepared materials are uniformly mixed, and the sol-gel method is carried out in a solution, so that even if the content of doped elements is very low, the doping can be easily realized; the material is prepared by adopting a solid phase method, and the method has the advantages of convenience in operation, simple synthesis process, uniform particle size, no agglomeration of powder particles, good filling property, low cost, high yield and the like, so that the electrochemical performance of the cathode catalyst is improved, and the method is convenient to operate and suitable for industrial production.

The invention discloses an electrochemical system and method for treating nitrogen-containing organic wastewater based on a double-sided cathode. The electrochemical system comprises a reactor, an aeration device, a power supply, an anode and the double-sided cathode, and the double-sided cathode is prepared by loading a functional catalyst through a double-sided rolling coating process. Under the condition of not adding exogenous iron ions and H2O2, the side, with the electro-catalytic degradation function, in the double-sided cathode generates. OH in situ through the oxygen reduction reaction of two electrons and the electro-Fenton process, so that efficient degradation of organic pollutants is realized; meanwhile, NO3 <-> can be converted into N2 to be discharged under the synergistic effect of the sides, with the denitrification function, of the DSA and the double-sided cathode, organic pollutants and total nitrogen are synchronously removed, the denitrification function and the electrocatalytic degradation function are integrated in the single cathode, the device is more compact and efficient, the current efficiency and the mass transfer efficiency are improved, and the device is suitable for large-scale popularization and application. The complexity and the occupied area of the system are reduced, and the energy consumption and the operation cost are reduced.

The invention discloses a preparation method of a cathode catalyst and a positive pole piece for a neutral zinc-air battery, and relates to the field of zinc-air batteries. The material of the catalyst is M-N-C (M is a transition metal), nitrogen is dissociated by discharging in a nitrogen atmosphere through a plasma ball mill, and metal particles separated from metal balls composed of M under high-speed impact are directly loaded on a highly dispersed carbon substrate through electric field adsorption. And carrying out high-temperature heat treatment on the mixed material subjected to the process in a tubular furnace under the protection of inert gas to obtain the target M-N-C catalytic material. When the M-N-C catalytic material provided by the invention is used as a cathode catalyst layer of the neutral zinc air battery, the reaction efficiency of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) can be effectively improved, the overpotential of the zinc air battery is reduced, the cycle stability of the neutral zinc air battery is improved, and the cycle life is prolonged.

A lithium cobalt oxide, a preparation method therefor, and a use thereof, relating to the field of lithium ion batteries. The lithium cobalt oxide comprises large particles LicCo1-dMdQeO2-e and small particles LiaCo1-bTbEfO2-f, the M element being a doping element, the Q element being a wrapping element, the T element being a doping element, and the E element being a wrapping element. By matching large and small particles of lithium cobalt oxide, an oxygen reduction reaction between an electrolyte and the surface of a positive electrode material can be inhibited, Co valence state changes in the positive electrode material are inhibited, Co dissolution is reduced, the capacity is increased, and the storage and gas production performance of a lithium cobalt oxide positive electrode material are improved.

The invention discloses a hexagonal bismuth phosphate modified indium zinc sulfide (ZIS / HBIP) composite catalyst and a preparation method thereof. The catalyst is applied to photocatalytic synthesis of HO. The indium zinc sulfide (ZIS) nano flower balls in the catalyst are prepared by a hydrothermal method, and then hexagonal bismuth phosphate (HBIP) is loaded on the surface of the ZIS by a room temperature precipitation method to obtain a series of ZIS / HBIP composite catalysts. ZIS and HBIP can effectively improve photo-induced electron-hole separation and transmission, improve the selectivity of direct two-electron oxygen reduction reaction (2eORR) and inhibit HO decomposition. Experimental results show that when the theoretical dosage of HBIP is 0.01 mmol, the prepared ZIS / HBIP 0.01 has the optimal photocatalytic activity, the HO yield within 1 h can reach about 955 [mu] mol.g.h, and efficient synthesis of HO in pure water is achieved.

The invention discloses an electrode material for purifying and disinfecting drinking water as well as preparation and application thereof, and belongs to the technical field of drinking water purification. An Ag nano structure and an Au nano structure are sequentially constructed on a plastic base material, the electrode material is endowed with excellent antibacterial and catalytic performance, the Ag nano structure is formed through acid treatment and precursor solution soaking, and the preliminary antibacterial performance is endowed; the antibacterial effect is enhanced by micro-emulsion soaking; the microemulsion A and the solution B are mixed to prepare a spraying solution, a stable Au nanostructure is formed after spraying, an electrochemical oxygen reduction reaction is promoted, the H2O2 generation efficiency is improved, hydroxyethyl ethylenediamine triacetic acid and acrylamide are used in cooperation, the Au dosage and the complexing temperature are adjusted, a microcosmic honeycomb structure is formed, and the H2O2 concentration is remarkably improved. The electrode material has antibacterial performance, also has excellent conductivity and catalytic activity, is stable in purification effect before and after use, can be repeatedly used, and has wide application prospects in the fields of drinking water purification and the like.

According to the heteroatom-doped carbon nanohorn catalyst and the preparation method and application thereof, doping elements are accurately introduced into a carbon nanohorn framework in the preparation process of the catalyst, a stable heterostructure is formed, two-dimensional adsorption and activation of O2 molecules on the surface of an electrode are effectively enhanced, a two-electron reduction path is remarkably promoted, and the heteroatom-doped carbon nanohorn catalyst is prepared. The four-electron reduction side reaction is inhibited, the H2O2 selectivity and the oxygen reduction reaction (ORR) activity are enhanced, and the H2O2 yield and the Faraday efficiency are remarkably improved. Meanwhile, the heteroatom-doped carbon nanohorn catalyst has high electrochemical stability in a chloride ion-containing system, shows excellent stability and corrosion resistance under a natural seawater condition, and is suitable for long-time continuous operation.

The invention provides a W-PtM / C catalyst for ORR and a preparation method of the W-PtM / C catalyst. The W-PtM / C catalyst comprises W, Pt, transition metal M and a carbon carrier, the mass fraction of W in the W-PtM / C catalyst is 0.1-5 wt%, the mass fraction of Pt in the W-PtM / C catalyst is 10-40 wt%, the mass fraction of transition metal M in the W-PtM / C catalyst is 3-20 wt%, and the balance is the carbon carrier. According to the W-PtM / C catalyst for ORR, a tungsten element is doped in a platinum-based alloy, the doped tungsten element can randomly replace transition metal M in crystal lattices, and meanwhile, due to the fact that the tungsten element has a special electronic structure, dissolution of Pt and the transition metal M in the oxygen reduction reaction process is effectively inhibited, and therefore on the basis that it is guaranteed that the W-PtM / C catalyst has high ORR activity, the W-PtM / C catalyst has the high ORR activity. And the ORR stability of the W-PtM / C catalyst is greatly improved.

The invention provides a high-entropy intermetallic compound bifunctional catalyst as well as a preparation method and application thereof, and belongs to the technical field of energy materials. A wet chemical synthesis method and a controllable annealing process are combined to prepare the high-entropy intermetallic compound bifunctional catalyst, the catalyst comprises carbon-loaded platinum-cobalt-copper-tungsten-molybdenum five-element high-entropy alloy nanoparticles, the alloy nanoparticles have a high-entropy effect and an ordered structure at the same time, the particle size is 4-7 nm, and the particle size of the alloy nanoparticles is 4-7 nm. The molar ratio of metal atoms, namely platinum to cobalt to copper to tungsten to molybdenum, is 4: (1.75 to 2.5): (1.75 to 2.5): (0.01 to 0.5): (0.01 to 0.5). The platinum loading capacity in the catalyst is 20-70 wt%, the catalyst is used for oxygen reduction reaction catalysis of a cathode in a hydrogen fuel cell and / or methanol oxidation reaction catalysis of an anode in a direct methanol fuel cell, the half-wave potential in an acid medium exceeds a commercial Pt / C catalyst by 30 mV or above, and the methanol oxidation peak current density is 1.4-2.5 times that of the commercial Pt / C catalyst or a commercial PtRu / C catalyst.