7 results about "Cathodic catalyst" patented technology

Catalyst-coated ion-conducting membrane comprising an anode catalyst layer, a cathode catalyst layer and an ion-conducting membrane layer arranged between the anode catalyst layer and the cathode catalyst layer, wherein: the anode catalyst layer comprises an anode electrocatalyst and an ion-conducting polymer, wherein the anode electrocatalyst comprises particles of a platinum group metal or a platinum group metal alloy, and the anode electrocatalyst is present in the anode catalyst layer with a load of less than 0.20 mg of the platinum group metal per cm² of the anode catalyst layer;and the cathode catalyst layer comprises an ion-conducting polymer and a cathode electrocatalyst comprising platinum-containing particles and a carbon-based support, wherein the carbon-based support comprises individual primary particles or an aggregate of primary particles, the primary particles comprising pores, with some of the platinum-containing particles located within the pores and some of the platinum-containing particles located on an outer surface of the carbon-based support; wherein the platinum-containing particles on the outer surface of the carbon-based support have a mean average particle size of ≤3.0 nm; and wherein less than 50% of the surface area of ​​the platinum-containing particles is in contact with the ion-conducting polymer of the cathode catalyst layer.

The invention discloses a nano porous nickel electrocatalyst material as well as a preparation method and application thereof. Belongs to the technical field of electrolyzed water hydrogen production catalysts. According to the method, a nickel net substrate is subjected to pretreatment, electrogalvanizing, high-temperature alloying and chemical dealloying, and finally the nano-porous nickel electrocatalyst material growing on the nickel net is obtained. The electrocatalyst material prepared by the method has a uniform three-dimensional nano porous structure, the thickness of a porous layer is 10-70 [mu] m, and the aperture is 100-500 nm. As an alkaline electrolytic water hydrogen evolution reaction cathode catalyst, the material has high specific surface area and rich active sites, and shows lower overpotential and excellent long-term stability. The method is simple in technological process, raw materials are easy to obtain, and the method has large-scale production potential and has wide application prospects in the field of hydrogen production through water electrolysis.

The application discloses a kind of high corrosion resistance high-performance cathode catalyst materials, it is related to energy technology field, catalyst material includes: iron powder 30-50 parts, nickel powder 30-50 parts, phosphorus powder 16 parts, carbon powder 4-10 parts and platinum powder 0-4 parts.The application further discloses a kind of preparation method of high corrosion resistance high-performance cathode catalyst materials.The catalyst prepared by the application has high activity, high selectivity, high stability, high corrosion resistance, and the catalyst is not easy to fail during work, can be stable for a long time, especially suitable for oilfield high salt, high sulfur produced water environment, large-scale suitable for electrolytic water hydrogen production technology field, under the premise of ensuring high corrosion resistance and high catalytic activity, reduce the preparation cost of catalyst, realize economic benefit maximization.

The application discloses a preparation method of a FeS-loaded alginate-derived carbon shell-coated Fe3O4 catalyst (FeS / Fe3O4@C) and loading of the catalyst on a cathode for efficient removal of pollutants by heterogeneous electro-Fenton water treatment. Sodium alginate, carbon black and FeSO4 are mixed as a carbon source and an iron source respectively, and a three-dimensional gel synthesized by one-step cross-linking is pyrolyzed in situ, so that the obtained catalyst realizes deposition of FeS on the surface of carbon-coated Fe3O4 particles and exhibits multi-layer structure and multi-reaction active centers. The bifunctional electro-Fenton catalyst prepared in the application is low in cost and high in catalyst stability, the H2O2 selectivity of the cathode catalyst can reach 90%-95%, and the iron dissolution is extremely low (<0.18 mg / L ‑1 ), the cathode has good reusability, and meanwhile, the method has excellent catalytic performance in degradation of pollutants in the pH range of 3-11, and has wide application prospect in the field of actual water treatment.

This invention belongs to the field of electrochemical technology, specifically relating to a water electrolysis cathode catalyst and its preparation method. The water electrolysis cathode catalyst of this invention comprises a SnO2 matrix, on which a first layer of noble metal Pt is loaded to obtain Pt / SnO2; MoS2 nanosheets are loaded on the surface of the Pt / SnO2 to obtain MoS2 / Pt / SnO2; a second layer of noble metal Pt is loaded on the surface of the MoS2 / Pt / SnO2 to obtain Pt / MoS2 / Pt / SnO2; wherein the loading amount of the first layer of noble metal Pt is 1-5% of the mass of the SnO2 matrix, the loading amount of the MoS2 nanosheets is 50-80% of the mass of Pt / SnO2, and the loading amount of the second layer of noble metal Pt is 1-10% of the mass of MoS2 / Pt / SnO2; the Pt / MoS2 / Pt / SnO2 catalyst serves as the water electrolysis cathode catalyst. This invention utilizes a combination of liquid-phase reduction, hydrothermal, and microwave methods to prepare a catalyst. The resulting catalyst exhibits excellent hydrogen evolution catalytic activity and a low cathode overpotential, reducing the amount of precious metals used and significantly lowering costs. It also demonstrates good catalytic performance during water electrolysis and hydrogen evolution, and has broad market prospects.

The application provides a low-loading IrO2 electrolytic water membrane electrode, a preparation method and application thereof, and the preparation method comprises the following steps: S1, dispersing iridium dioxide and a polymer in a mixed solution to obtain a spinning precursor solution; the mixed solution comprises a Nafion solution, water and isopropyl alcohol; S2, performing electrostatic spinning on the spinning precursor solution to obtain an IrO2 nanofiber layer; S3, performing hot pressing transfer printing on the Nafion membrane to form an anode catalytic layer; S4, spraying a cathode catalyst slurry on the other side of the Nafion membrane, and performing hot pressing to form a cathode catalytic layer, and finally obtaining the low-loading IrO2 electrolytic water membrane electrode. The low-loading IrO2 electrolytic water membrane electrode with high ordering degree, uniform and controllable fiber diameter and uniform catalyst particle distribution is constructed, the utilization rate of the catalyst is improved while the loading of the noble metal catalyst is reduced, the three-phase interface of the membrane electrode is enlarged, and the high activity is achieved in water electrolysis catalysis.