33results about How to "Excellent catalytic reduction performance" patented technology

The invention relates to an exhaust gas catalyst used in a methanol / diesel co-located combustion system and a method for using the same, which belongs to the field of vehicle exhaust catalysts. The present invention solves the problem for dealing with combustion system tail gas. The present invention is mainly made of sodium fatty acid methyl ester sulfonate, cerium oxide, neodymium fluoride, triethanolamine, polyisobutylene succinimide, diisopropyl dithiophosphoric acid molybdenum sulfide, and the parts by weight are respectively 2-27 parts of sodium fatty acid methyl ester sulfonate, 30-40 parts of cerium oxide, 30-35 parts of neodymium fluoride, 2-4 parts of triethanolamine, 7.5-12 parts of polyisobutylene succinimide, 3.5-7 parts of diisopropyl dithiophosphoric acid oxymolybdenum sulfide, the mass ratio of a catalyst for exhaust gas in a methanol / diesel co-located combustion system to the vehicle urea is 0.05-0.2:1, mixed After uniformity, the obtained mixed solution is added to the urea metering injection device. The invention can effectively absorb harmful gas.

The invention discloses a preparation method and application of high-performance molybdenum disulfide / oxidized graphene / ferric oxide yellow composite catalyst. Molybdenum disulfide, oxidized grapheneand ferrous sulfate are mixed; after uniform ultrasonic dispersion, water-bath heating reaction is performed to obtain the molybdenum disulfide / oxidized graphene / ferric oxide yellow composite catalyst; the composite catalyst can be used as a catalyst in trifluralin catalytic reduction reaction. Laminar molybdenum disulfide is added into the prepared composite catalyst, so that the catalytic performance of the composite catalyst is greatly improved.

The invention discloses an activated coke supported nano-gold catalyst as well as a preparation method and application thereof. The catalyst takes activated coke as a carrier, and the surface of the carrier is loaded with gold nanoparticles. The preparation method of the catalyst comprises the following steps: mixing the activated coke with water, then mixing the obtained mixture with a chloroauric acid solution, and carrying out ultrasonic treatment to obtain mixed liquid of the activated coke and chloroauric acid; mixing the obtained mixed liquid with an ascorbic acid solution for carrying out a reduction reaction to obtain the activated coke supported nano-gold catalyst. The activated coke supported nano-gold catalyst provided by the invention has the advantages of being good in dispersity, high in load rate, good in adsorption performance and catalytic performance, and the like; the preparation method of the catalyst has the advantages of simple preparation process, simpleness andconvenience in operation, high production efficiency, short production cycle, low cost, high product yield rate, and the like; an activating agent and a protective agent are not added into the catalyst, and the catalyst can be prepared on a large scale under the room temperature condition, and is beneficial to industrial utilization. The catalyst provided by the invention can rapidly and thoroughly realize catalytic reduction of nitroaromatic compounds, thus having good use value and application prospect.

The invention discloses a direct sodium borohydride fuel cell anode. Etching pits are fully distributed in a foamed nickel current collector, wherein the dimensions of the etching pits are in nanometer scale; Pd nanorods or PD nanoparticles grow inside the etching pits and are used as anode catalyst of the fuel cell. The manufacture method for the anode structure comprises the steps of: putting the foamed nickel in a dilute acid solution for a period of time, thus generating the etching pits in the surface of metal Ni of the foamed nickel, wherein the diameters and the depths of the etching pits are in nanometer scale; taking the foamed nickel out of the dilute acid solution, washing, and drying the foamed nickel; putting the foamed nickel in a mixed solution of polyvinyl pyrrolidone, sodium chloropalladate, potassium bromide, ethanol and a reducing agent for reacting for 0.1-12h at 10 DEG C to 200 DEG C; taking out the foamed nickel, washing and drying the foamed nickel, and cutting the washed and dried foamed nickel to be in proper dimension as the anode. The direct sodium borohydride fuel cell anode has the advantages of stable electron conduction, good binding force and high catalyst space utilization rate.

The invention discloses a preparation method and application of a polydopamine / nano molybdenum disulfide photocatalyst. The preparation method comprises the following steps: first, preparing molybdenum disulfide nano-sheets by a lithium ion intercalation method; then adding mercaptoethylamine for modification to obtain aminated molybdenum disulfide; then introducing a dopamine monomer into the reaction system to mix uniformly with the aminated molybdenum disulfide; and finally, synthesizing a polydopamine / nano molybdenum disulfide composite by self-condensation of dopamine on the surface of the aminated molybdenum disulfide. Due to the introduction of polydopamine into the composite catalyst prepared by the method provided by the invention, the photocatalytic performance of the composite catalyst is greatly improved.

The invention discloses in-situ generated carbon nanotubes as well as a preparation method and application thereof. A carbon nanotube material is generated in situ by annealing a cross-linked polymerobtained by taking acetylacetone and acetylacetone nickel to be subjected to aldol condensation reaction under the action of strong alkali, i.e., sodium hydroxide. The carbon nanotube material has theinner diameter of 5 to 30nm, the outer diameter of 10 to 50nm, the length of 20 to 200mu m, the specific surface area of 50 to 200m<2>g<-1> and the electrical conductivity of 30 to 400Scm<-1>. By utilizing the method disclosed by the invention, the carbon nanotubes with a long size, good dispersity in a solution and excellent electron conduction effect can be produced in a large batch. Furthermore, the prepared carbon nanotubes have a very good effect of catalyzing the reduction of 4-nitrophenol.