Method for synthesizing PdPt/graphene nano electrical catalyst in one step by microwave process

An electrocatalyst and graphene technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as long time and complexity, and achieve improved efficiency, Improve the effect of uniform distribution and outstanding mechanical properties

Inactive Publication Date: 2011-08-17
NANJING NORMAL UNIVERSITY
View PDF1 Cites 47 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method is more comp

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 synthesizing PdPt/graphene nano electrical catalyst in one step by microwave process
  • Method for synthesizing PdPt/graphene nano electrical catalyst in one step by microwave process
  • Method for synthesizing PdPt/graphene nano electrical catalyst in one step by microwave process

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] Disperse 1 mL of 2 mg / mL graphene oxide ultrasonically in 50 mL of 25 mmol / L cetyltrimethylammonium bromide aqueous solution, and then add 0.75 mL of 48 mmol / L chlorination Palladium solution and 0.5 mL of 24 mmol / L potassium chloroplatinate solution are mixed thoroughly. The pH of the mixed solution was adjusted to 9.0 with an aqueous sodium hydroxide solution. Add 0.402g of ascorbic acid and mix well. Transfer the solution to a microwave chemical reactor, connect the condensed water, set the power to 200 W, take it out after microwave heating for 4 minutes, cool it to room temperature naturally, take out the sample and wash it by centrifugation (washed with water and ethanol for three times), 60 o After drying with C, a PdPt / graphene composite material is obtained, wherein the ratio of the amount of Pd to Pt is 3:1. Observed by transmission electron microscope, PdPt bimetallic nanoparticles are dispersed on the surface of the graphene sheet. The bime...

Example Embodiment

[0032] Example 2

[0033] Disperse 1 mL of 2 mg / mL graphene oxide ultrasonically in 50 mL of 25 mmol / L cetyltrimethylammonium bromide aqueous solution, and then add 0.5 mL of 48 mmol / L chlorination Palladium solution and 1 mL of 24 mmol / L potassium chloroplatinate solution are mixed thoroughly. The pH of the mixed solution was adjusted to 9.0 with an aqueous sodium hydroxide solution. Add 0.402g of ascorbic acid and mix well. Transfer the solution to a microwave chemical reactor, connect the condensed water, set the power to 200 W, take it out after microwave heating for 4 minutes, cool it to room temperature naturally, take out the sample and wash it by centrifugation (washed with water and ethanol for three times), 60 o After drying with C, a PdPt / graphene composite material is obtained, wherein the ratio of the amount of Pd to Pt is 1:1. Observed by transmission electron microscope, PdPt bimetallic nanoparticles are dispersed on the surface of the graphene sheet. The bimetal...

Example Embodiment

[0034] Example 3

[0035] Disperse 1 mL of 2 mg / mL graphene oxide ultrasonically in 50 mL of 25 mmol / L cetyltrimethylammonium bromide aqueous solution, and then add 0.25 mL of 48 mmol / L chlorination Palladium solution and 1.5 mL of 24 mmol / L potassium chloroplatinate solution are mixed thoroughly. The pH of the mixed solution was adjusted to 9.0 with an aqueous sodium hydroxide solution. Add 0.402 g of ascorbic acid and mix well. Transfer the solution to a microwave chemical reactor, connect the condensed water, set the power to 200 W, take it out after microwave heating for 4 minutes, cool it naturally to room temperature, take out the sample and wash it ultrasonically (washed with water and washed with ethanol three times), 60 o After drying C, a PdPt / graphene composite material is obtained, wherein the ratio of the amount of Pd to Pt is 1:3. Observed by transmission electron microscope, PdPt bimetallic nanoparticles are dispersed on the surface of the graphene sheet. The bim...

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

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for synthesizing a PdPt/graphene nano electrical catalyst in one step by a microwave process, which comprises: dispersing graphene oxide in aqueous solution of quaternary ammonium salt surfactant through ultrasonic waves, adding solution of a soluble Pd II salt or PtII salt, fully and uniformly mixing, regulating the pH value of mixed solution, adding a reducer, uniformly mixing, reacting under radiation of microwaves to reduce palladium and platinum metal ions and graphene oxide, and cooling, washing and drying the reactants to obtain the PdPt/graphene nano electrical catalyst. The method has the characteristics of energy conservation, environmental protection, quickness, simple process and the like. The obtained PdPt/graphene nano electrical catalyst hasa high electric catalysis performance for the electrochemical oxidization of methanol.

Description

technical field [0001] The invention relates to a preparation method of a nanometer material, in particular to a preparation method of a PdPt / graphene nanometer electrocatalyst, and belongs to the technical field of nanocatalyst preparation and the technical field of electrochemical energy. Background technique [0002] In direct methanol fuel cells ( DMFC ), the anode catalysts commonly used are carbon-supported Pt-based catalysts. However, the price of metal Pt is expensive, and the intermediate products of methanol oxidation (mainly CO, etc.) are easy to poison it, resulting in a decrease in the activity of the catalyst (Lamy C, Lima A, LeRhun V, Delime F, Coutanceau C, Léger JM. J . Power Sources 2002, 105, 283.). In order to overcome the above shortcomings, many studies have introduced other metals and platinum to form bimetallic catalysts to alleviate the CO poisoning phenomenon, thereby improving the utilization rate of Pt and the performance of the catalyst. The Pd...

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
IPC IPC(8): B01J23/44B01J37/34B01J37/16H01M4/92B82Y40/00
CPCY02E60/50
Inventor 张卉蔡称心吴萍
Owner NANJING NORMAL UNIVERSITY
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