35results about How to "High onset potential" patented technology

The invention relates to an electrode for an alkaline water electrolysis full battery and a preparation method thereof. The full battery includes a water electrolysis cell body, and the water electrolysis cell body is separated into a cathode cavity and an anode cavity which are not connected to each other by a diaphragm. The cavity and the anode cavity are respectively equipped with a cathode and an anode, and the diaphragm is a sulfonated polyether ketone ion exchange membrane; the anode is a hydrated cobalt-nickel sulfide nanosheet or a hydrated cobalt-nickel sulfide strip formed in situ on the surface of the nickel-based substrate bring. The electrode with this structure has the characteristics of high surface roughness and large electrochemical reaction area. The existence of two-dimensional nanosheets can not only promote electron transfer and material transport, but also provide more reactive sites for water electrolysis reactions. Thereby reducing the onset potential of OER and increasing the speed of water electrolysis reaction. Since the substrate Ni is relatively stable in an alkaline environment, the incorporation of Co elements makes the structure of nickel sulfide more stable, thereby maintaining its structure and catalytic performance during continuous water electrolysis.

The invention discloses a stamen-type S-doped manganese-copper electrocatalyst based on metal polyphenol modified sodium alginate / nanocellulose composite airgel, and the manganese-copper electrocatalyst is C@MnOCu 7.2 S 4 -TA. The nanocellulose prepared by the acid hydrolysis method introduces a large amount of sulfur doping, and the three-dimensional network structure of the sodium alginate / nanofiber composite airgel has a large number of pores as a porous carbon template, which increases the contact area with the precursor metal solution, making the tannin The modified metal polyphenol network is uniformly distributed in the sodium alginate / nanofiber composite airgel. The nanocomposite material synthesized after high temperature carbonization presents a stamen shape. The invention is used to solve the shortcomings of existing fuel cell catalysts, such as low reversibility of cathode oxygen reduction reaction, small exchange current density, high cost of Pt-based catalytic materials and poor toxicity resistance, etc. The obtained oxygen reduction catalyst has high potential, Excellent limiting current and high methanol tolerance and other advantages.

The invention relates to a method for preparing a bayberry-shaped cobalt-nickel-boron composite carbon material proton membrane fuel cell catalyst. The nanomaterial active substance is a bayberry-shaped cobalt-nickel-boron composite carbon material, referred to as CoNi@TA / B. Solve the existing problems of existing fuel cell catalysts and overcome the defects of the prior art. At present, fuel cell catalysts generally face the problems of single precursor and synthesis cost, as well as defects such as high cost and toxicity of Pt-based catalytic materials; based on CoNi MOF With a unique structure, a metal-organic framework nanocomposite material for proton membrane fuel cells has been developed, which has high onset potential, half-slope potential, excellent limiting current, excellent stability and good methanol tolerance, It has the advantages of strong resistance to methanol poisoning.

The invention relates to a preparation method of a plant polyphenol-modified supramolecular network frame structure manganese-based nanocomposite electrocatalyst, wherein the nanomaterial active substance is ZIF-8@TA-Mn. Solve the problems of existing fuel cell catalysts and overcome the defects of the existing technology. At present, fuel cell catalysts generally face the problems of single precursor and synthesis cost, as well as the high cost and toxicity of Pt-based catalytic materials. Based on ZIF‑ 8 Unique structure, developed a metal-organic framework nanocomposite for proton membrane fuel cells with high onset potential, half-slope potential, excellent limiting current and excellent stability and good methanol tolerance , has the advantages of strong anti-methanol poisoning ability.

The invention discloses a zinc-nitrogen modified double-carbon catalytic material, a preparation method thereof, and an application in a zinc-air battery. Using dimethylimidazole and zinc salts as raw materials to synthesize metal frame ZIF-8, the metal frame ZIF-8 is subjected to the first heat treatment in a protective atmosphere to obtain zinc-modified porous carbon materials, and zinc-modified porous carbon materials are combined with sugar compounds. After mixing with nitrogen source compounds by ball milling, a second heat treatment is performed in a protective atmosphere to obtain a zinc-nitrogen modified double-carbon catalytic material; the catalytic material has zinc-nitrogen double modification, is rich in defects and porous structure, and has good electrical conductivity and It has a 3D network structure and is applied to a zinc-air battery to obtain high power density and specific capacity; the preparation method of the catalytic material has low cost, simple steps, and is beneficial to industrial production.

The invention discloses a TPhP degradation method, a biochar-inorganic mineral composite material and a preparation method thereof, wherein the TPhP degradation method comprises the following steps: S1: preparing N-doped biochar-inorganic mineral composite material; S2: Measure the concentration of TPhP in the sewage and the degradation rate of the prepared composite material, and calculate the amount of the composite material required for degradation; S3: Add PDS to the sewage water body, adjust its concentration to a predetermined value, and add the composite Stir or vibrate the material for 4-8 hours to make the composite material catalyze and activate PDS, absorb and degrade TPhP in the water body; S4: measure the concentration of TPhP in the treated water body, and repeat steps S2-S3 if it does not meet the standard , until the target is reached. The invention also provides a biochar-inorganic mineral composite material and a preparation method thereof. The method and material provided by the invention have simple process, wide sources, environmental friendliness, high efficiency and low cost, and can meet the needs of wide-scale popularization and application.