Method for preparing nano-dendritic platinum catalyst

A nanostructure, platinum catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, nanotechnology, etc., can solve the application limitations of platinum dendritic nanostructures, complex reaction processes, and long reaction times. Simple method, high electrocatalytic activity, good dispersion effect

Inactive Publication Date: 2013-12-25
SHANGHAI UNIV
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the many reactions to synthesize platinum dendritic nanostructures, the required reaction process is complex (multi-step reaction, seed crystal growth, high reaction temperature, long reaction time), which limits the application of platinum dendritic nanostructures.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing nano-dendritic platinum catalyst
  • Method for preparing nano-dendritic platinum catalyst
  • Method for preparing nano-dendritic platinum catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) First, weigh 1.0g of H with an electronic balance 2 PtCl 6 ·6H 2 O, dissolved in 60 mL deionized water to make 60 mL 0.06 mM H 2 PtCl 6 solution; then add 3.0 g of PVP to the Wang solution, stir well and then add 3ml of isopropanol to form a well-mixed solution.

[0024] (2) Put the uniformly mixed solution into a plastic bag, irradiate with a dose of 140KGy, and irradiate at a current of 7mA for 10 minutes to obtain a black solution.

[0025] (3) Transfer the obtained product to a centrifuge tube, then centrifuge at high speed for 30min (16000rpm), discard the upper layer, wash the precipitate with ethanol and water repeatedly, and centrifuge several times until no suspended matter appears in the upper layer.

[0026] (4) Dry the precipitate in a vacuum drying oven at a temperature of 60° C. for 10 hours to obtain a black platinum dendritic nanostructure.

[0027] (5) Use a clean glassy carbon electrode as the working electrode, a calomel electrode as the ref...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for preparing a nano-dendritic platinum catalyst. The method comprises the steps: mixing H2PtCl6.6H2O with PVP (Polyvinylpyrrolidone), and adding isopropanol after uniformly mixing; irradiating under the irradiating dosage of 140KGy, transferring an obtained product into a centrifuge tube, and then, carrying out high-speed centrifugation so as to obtain a precipitate; discarding supernatant, repeatedly washing the precipitate by using ethanol and water, and carrying out centrifugation repeatedly until no suspended matters appear in an upper layer; drying the precipitate for a period of time in a vacuum drying oven at certain temperature, thereby finally obtaining the nano-dendritic platinum catalyst. According to the nano-dendritic platinum catalyst obtained by the method, the effective electrochemical surface area is 39.5m<2> / g, the If / Ib is 1.57, the electrocatalysis activity and poisoning resistance are high, the problems during the anodic electrooxidation of methanol that the rate is slow, the phenomenon of polarization is serious, the catalysis efficiency is low, and the like can be solved, and the nano-dendritic platinum catalyst can directly serve as an anode catalyst of a methanol fuel cell.

Description

technical field [0001] The invention relates to a preparation method of a platinum catalyst, in particular to a preparation method of a dendritic nanostructure platinum catalyst. Background technique [0002] In the last two decades, the application of nano-noble metals in various fields has been extensively studied. This is because nano-noble metals not only have bulk properties such as chemical stability, electrical conductivity, and high catalytic performance, but also have unique optical, Electrical, catalytic, magnetic properties. Among them, nanoporous metals have unique physical, chemical and mechanical properties due to their unique structures such as nanoscale pore size, bicontinuous internal structure, and high specific surface area, and have an irreplaceable position in the field of materials science. . Platinum and its alloys are widely used as catalysts in chemical reactions; for example, due to their excellent performance in absorbing and dissociating hyd...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B01J23/42B01J35/08B82Y40/00
Inventor 潘登余李珍李敬慧王亮
Owner SHANGHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap