7results about How to "Increase active area" patented technology

The invention relates to an oxygen evolution catalyst for hydrogen production through electrolysis of proton exchange membrane water, a membrane electrode and a preparation method of the membrane electrode, and the oxygen evolution catalyst is iridium oxide in a nanoparticle form and contains 2-2.5% of crystal water; the preparation method of the catalyst comprises the following steps: carrying out ultrasonic treatment on an iridium salt solution, mixing the iridium salt solution with magnesium sulfate and water, carrying out ultrasonic treatment, volatilizing a solvent, drying, carrying out ball milling to obtain powder, carrying out high-temperature calcination, dissolving with dilute acid, carrying out suction filtration with water and ethanol until the conductivity is less than 10 [mu] s / cm, carrying out vacuum drying to remove moisture, and grinding to obtain the catalyst. The membrane electrode comprises the catalyst powder prepared by the method and an anode catalyst layer formed by perfluorinated sulfonic acid resin; and the cathode catalyst layer is formed by Pt / C and perfluorosulfonic acid resin. The oxygen evolution catalyst provided by the invention has high activity and high stability, magnesium sulfate is adopted in the preparation method, and the oxygen evolution catalyst has the advantages of simple operation, low cost and the like.

The invention relates to a preparation method of a phosphorus defect bimetallic oxygen evolution catalyst. The preparation method comprises the following steps: S1, dissolving 2.4 mmol of nickel chloride hexahydrate, 0.8 mmol of vanadium chloride and 300mg of urea in 80ml of deionized water, and uniformly stirring for 10 minutes; s2, putting a product obtained in the step S1 and foamed nickel into a 100ml reaction kettle, reacting at 120 DEG C for 12 hours, and drying in a drying box after reaction; s3, putting the product in S2 and 0.8 g of sodium dihydrogen phosphate into a tubular furnace, heating to 350 DEG C at a heating rate of 3 DEG C / min in an argon atmosphere, and reacting for 3 hours to obtain nickel vanadium phosphide loaded foamed nickel; and S4, the product obtained in the S3 is put into a sodium borohydride solution to be soaked for 30 min, the product is taken out and dried, and a final product, namely the nickel vanadium phosphide loaded foamed nickel with the vacancy defect, is obtained.

The application discloses a kind of multi-level hole metal catalytic electrode and preparation method thereof, and preparation method includes using physical vapor deposition on foam nickel substrate magnetron sputtering film forming, forms nickel coating;Nickel coating is deposited in electrode in lye and is soaked, cleaning, i.e. the multi-level hole catalytic electrode with microporous and nanopore structure is obtained.The application constructs the microporous structure of nanometer grade on the flat skeleton of foam nickel substrate by magnetron sputtering and the post-processing method of lye soaking, significantly increases specific surface area.It is rich in surface structure, increases the active area of catalytic electrode, and then realizes the significant promotion of utilization efficiency and hydrogen evolution catalytic performance of nickel catalyst, and has better binding force simultaneously.

The invention discloses a biochar-polyurethane carbon anode material, a preparation method thereof, a microbial fuel cell and application, biochar, polyol, triethanolamine, water and isocyanate are added into a mold to be mixed to obtain a mixture, the mixture reacts under stirring until white floating foam appears, then standing foaming is performed, carbonization is performed after the material is cured, and the biochar-polyurethane carbon anode material is obtained. The internal resistance of a double-chamber microbial fuel cell constructed by taking the carbonized biochar-polyurethane material as an anode of MFCs is not greater than 3.00 omega, the highest voltage stably exceeds 620 mV, the maximum area power density exceeds 800 mW m <-2 >, and the COD removal rate of the biochar-polyurethane carbon anode material disclosed by the invention reaches 97.24%.

The application relates to an insulated gate high electron mobility transistor and a preparation method thereof, and the preparation method comprises the following steps: 1, epitaxial material growth; 2, vertical structure realization; 3, drain electrode manufacturing; 4, source electrode manufacturing; 5, ohmic metal annealing; 6, dielectric layer deposition; 7, gate electrode manufacturing; and 8, manufacturing of an interconnection lead. The application can solve the problems that the threshold voltage of a conventional GaN-based high electron mobility transistor device is less than 0 and the withstand voltage capacity is poor.

The invention discloses a TVS (Transient Voltage Suppressor) device and a preparation method thereof, and the TVS device comprises a substrate; a plurality of tube cores and a plurality of scribing channels, wherein the tube cores and the scribing channels are arranged on one side of the substrate at intervals; the scribing channel is provided with a first groove, the first groove extends into the substrate, and the side wall of the first groove is provided with an insulating isolation layer; the scribing channels insulate and isolate the adjacent tube cores; and the first electrode is positioned on one side, far away from the tube core and the scribing channel, of the substrate. According to the technical scheme, deep groove isolation columns do not need to be formed at the edges of the tube cores, isolation of the independent tube cores can be achieved through the scribing channel area, and the area of the active area of the TVS device can be effectively increased. And meanwhile, the manufacturing processes of isolating the independent tube core and forming the scribing groove to separate the independent tube core are integrated, so that the preparation process of the TVS device is simplified, and the cost can be effectively reduced.

The invention relates to a corrosion-resistant copper foil anode coating and a preparation method thereof, and belongs to the technical field of electrolytic copper foils. The coating is attached to the surface of a titanium substrate and comprises a three-layer structure, wherein a bottom layer is composed of NiO; the middle layer is formed by pinning crystal lattices with a solid solution network and filling pores in a dispersion manner, so that the porosity is lower than 5%; the surface layer is composed of a ternary solid solution and nitrogen-doped graphene. By means of the three-layer functional gradient design, interface chemical bonding, middle layer compact barrier and surface layer high-activity cooperation are achieved, and the corrosion resistance and the electrocatalytic activity of the anode are remarkably improved.