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

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.