Unlock instant, AI-driven research and patent intelligence for your innovation.

Direct methanol fuel cell electron catalyst preparation method

A methanol fuel cell and electrocatalyst technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high price, scarcity of precious metal catalysts, and reduction of precious metal loading

Active Publication Date: 2017-06-16
HUNAN AGRICULTURAL UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, noble metal catalysts used in direct methanol fuel cells are very scarce and expensive; the use of carbon carriers such as carbon black, carbon fiber, carbon nanotubes, graphene and other supported catalysts can greatly reduce the loading of noble metals and improve their utilization. The defects of the carrier itself make the noble metal nanoparticles large, and cause a large degree of agglomeration of the noble metal nanoparticles, which seriously affects the catalytic efficiency.

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
  • Direct methanol fuel cell electron catalyst preparation method
  • Direct methanol fuel cell electron catalyst preparation method
  • Direct methanol fuel cell electron catalyst preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] refer to figure 1 , the preparation method of the direct methanol fuel cell electrocatalyst of one embodiment, comprising:

[0028] Step S100: Dispersing graphene oxide and monomers in HAc-NaAc (acetic acid-sodium acetate) buffer solution to obtain a mixture of monomers and graphene oxide.

[0029] Disperse graphene oxide and monomer in HAc-NaAc buffer solution to obtain a mixture of monomer and graphene oxide

[0030] Graphene is a two-dimensional carbon material, which is a general term for single-layer graphene, double-layer graphene and few-layer graphene. Due to its excellent electronic, mechanical and thermal stability properties, it is widely used in batteries, electronic devices, sensors and composite materials. Its application has received widespread attention. Graphene oxide (graphene oxide) is the oxide of graphene, and the oxygen-containing functional groups on the graphene oxide increase to make it more active than graphene. Reduced graphene oxide: by re...

Embodiment 1

[0057] Distill the aniline under the conditions of heating and nitrogen protection, and then continue to distill the obtained fraction until the fraction is colorless, and store it in the dark at 4°C for future use.

[0058] Graphene oxide was dispersed in HAc-NaAc buffer solution with a pH value of 4, and the concentration of graphene oxide in HAc-NaAc buffer solution was 1 mg / mL. Then add aniline to obtain a graphene oxide dispersion of aniline, wherein the concentration of aniline is 0.01mol / L.

[0059] The glassy carbon electrode was used as the working electrode, the graphene oxide dispersion of aniline was added dropwise on the glassy carbon electrode, and dried, and then the modified glassy carbon electrode was used as the working electrode, the counter electrode was a platinum sheet electrode, and the reference electrode was a saturated glycerol electrode. The mercury electrode was placed in a 0.1mol / L sulfuric acid solution for cyclic voltammetry scanning, the scannin...

Embodiment 2

[0063] The difference between Example 2 and Example 1 is that the concentration of aniline is 0.1 mol / L, the pH value of the HAc-NaAc buffer solution is 5, and the graphite electrode is used as the working electrode. The thiol solution is a mixed solution of thiol in a mixed solvent, wherein the thiol is DMcT, and the concentration of DMcT is 0.01 mg / mL.

[0064] The electrode modified by the reduced graphene oxide composite material loaded with mercapto-polyaniline is used as the working electrode, the counter electrode is a platinum sheet electrode, the reference electrode is a saturated calomel electrode, and the electrolyte is a metal salt solution, wherein the electrolyte is sulfuric acid, ethyl alcohol The mixed solution of diol and potassium chloroplatinate, the concentration of sulfuric acid is 0.25mol / L, the concentration of ethylene glycol is 0.5mol / L, the concentration of potassium chloroplatinate is 1mmol / L, and the constant potential reduction is carried out. The ...

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 preparation method of an electrocatalyst of a direct methanol fuel cell (DMFC). The preparation method comprises the following steps: dispersing graphene oxide and a monomer in an HAc-NaAc buffer solution to obtain mixed liquor of the monomer and graphene oxide; carrying out cyclic voltammetry scan on the mixed liquor of the monomer and graphene oxide to obtain a conducting polymer loaded and reduced graphene oxide composite material modified electrode; by using the electrode as a working electrode and a thiol solution as an electrolyte, carrying out cyclic voltammetry scan by adopting a three-electrode system to obtain a thiolated conducting polymer loaded and reduced graphene oxide composite material modified electrode; by using the electrode as a working electrode and a metal salt solution as an electrolyte, carrying out constant potential reduction by adopting the three-electrode system to obtain the electrocatalyst of the DMFC on the working electrode. The preparation method adopts an electrochemical method and is simple in operating steps. The obtained catalyst has high metal particle dispersibility and small particle size and has high electroactivity and stability.

Description

technical field [0001] The invention relates to the technical field of fuel cell electrocatalysts, in particular to a preparation method of direct methanol fuel cell electrocatalysts. Background technique [0002] Direct Methanol Fuel Cell is a new type of environmentally friendly device that can convert chemical energy into electrical energy. It has the advantages of relatively cheap price, wide source of raw materials, and relatively safe storage and transportation. However, noble metal catalysts used in direct methanol fuel cells are very scarce and expensive; the use of carbon carriers such as carbon black, carbon fiber, carbon nanotubes, graphene and other supported catalysts can greatly reduce the loading of noble metals and improve their utilization. The defects of the carrier itself make the noble metal nanoparticles large, and cause the noble metal nanoparticles to agglomerate to a large extent, which seriously affects the catalytic efficiency. Contents of the inv...

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 Patents(China)
IPC IPC(8): H01M4/88H01M4/96
CPCH01M4/8825H01M4/96Y02E60/50
Inventor 苏招红罗艺周文新李朝荣蒋贵友周铁安
Owner HUNAN AGRICULTURAL UNIV