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Metal-doped polyaniline and polypyrrole compound carbonization electric catalyst and preparation method thereof

An electrocatalyst, polyaniline technology, applied in physical/chemical process catalysts, chemical instruments and methods, circuits, etc., can solve the problems of battery cost hindering the commercialization of fuel cells, high price, affecting battery output performance, etc.

Inactive Publication Date: 2013-09-25
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pt resources are scarce and expensive, and the high cost of batteries seriously hinders the commercialization of fuel cells
At the same time, methanol penetration leads to electro-oxidation on the cathode Pt catalyst, resulting in a "mixed potential", and the toxic intermediates produced by methanol oxidation can easily poison the catalyst, seriously affecting the output performance of the battery.

Method used

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  • Metal-doped polyaniline and polypyrrole compound carbonization electric catalyst and preparation method thereof
  • Metal-doped polyaniline and polypyrrole compound carbonization electric catalyst and preparation method thereof
  • Metal-doped polyaniline and polypyrrole compound carbonization electric catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve 360 ​​μL of pyrrole monomer in 30 mL of secondary water to form a solution of pyrrole monomer as solution A; dissolve 1.14 g of ammonium persulfate in 10 mL of secondary water to form a solution as solution B. The above-mentioned solution A and solution B were quickly mixed, and after fully stirring, they were reacted at 6°C for 24 hours. After the reaction was completed, 360 μL of aniline monomer and 1.14 g of ammonium persulfate solid were added, and reacted at 20°C for 24 hours to form paste. The above paste was spin-dried with a rotary evaporator, and then vacuum-dried for 24 hours to obtain a catalyst precursor. Put the dried catalyst precursor into a tube furnace, and pass through N for half an hour 2 Fill the tube furnace with N 2 , then the temperature was raised from room temperature to 350°C for 2 hours, and then continued to rise to 700°C for 2 hours at a rate of 2°C / min, then stopped heating, cooled naturally to room temperature and stopped N 2 ,...

Embodiment 2

[0031] The preparation process of the electrocatalyst for the direct carbonization of the polyaniline and polypyrrole composite is the same as in Example 1. The test was carried out in 1 mol / L NaOH aqueous solution saturated with oxygen. The scanning speed is 5 mV / s, and the corresponding linear scanning curve is shown in figure 1 . The onset potential of the oxygen reduction reaction is -0.113 V (vs SCE), and the current density is 2.69mA cm -2 -0.5V (vs SCE) 2000rpm.

Embodiment 3

[0033] Dissolve 360 ​​μL of pyrrole monomer in 30 mL of secondary water to form a solution of pyrrole monomer as A; 1.3 g of FeCl 3 6H 2 O solid was dissolved in 10mL of secondary water, and then 1.14g of ammonium persulfate was added, stirred evenly, and the formed solution was recorded as B. Mix the above-mentioned solutions A and B quickly, stir them well, and react at 6°C for 24 hours. After the reaction is completed, add 360 μL of aniline monomer and 1.14 g of ammonium persulfate solid, and react at 20°C for 24 hours to form a paste. shape. The above paste was spin-dried with a rotary evaporator, and then vacuum-dried for 24 hours to obtain a catalyst precursor. Put the dried catalyst precursor into a tube furnace, and pass through N for half an hour 2 Fill the tube furnace with N 2 , then the temperature was raised from room temperature to 350°C for 2 hours, and then continued to rise to 700°C for 2 hours at a rate of 2°C / min, then stopped heating, cooled naturally t...

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Abstract

The invention discloses a metal-doped polyaniline and polypyrrole compound carbonization electric catalyst and preparation method thereof. The preparation method comprises the following steps of: doping metal salt in the process that aniline is polymerized with a pyrrole monomer to form a composite polymer, subsequently carrying out carbonization treatment at a certain temperature so as to obtain a metal-doped carbonized product of the polyaniline and the polypyrrole compound, treating the carbonized product by using sulfuric acid, carrying out secondary thermal treatment at high temperature so as to obtain the metal-doped polyaniline and polypyrrole compound carbonization electric catalyst, adding absolute ethyl alcohol and a Nafion solution into the metal-doped composite catalyst, carrying out ultrasonic diffusion so as to form paste to be adhered to the surface of a glass-carbon electrode to be prepared into a corresponding metal-doped composite electric catalyst electrode. The catalyst shows high electric catalysis activity for oxygen reduction reaction, is high in initial potential in no matter acid or alkali electrolyte solutions, large in current density, simple in preparation method, low in cost, wide in raw material resource and wide in use in fuel batteries.

Description

technical field [0001] The invention belongs to the field of fuel cells, in particular to carbonization products of polyaniline and polypyrrole composites, carbonization products of iron-doped polyaniline and polypyrrole composites, cobalt-doped polyaniline and polypyrrole composites The preparation method of carbonized products, and the carbonized products of iron-cobalt-doped polyaniline and polypyrrole composites and the products thereof also involve the electrocatalytic activity test of these carbonized products for oxygen reduction reaction. Background technique [0002] A fuel cell is a device that converts chemical energy stored in fuel and oxidant directly into electrical energy. It has the advantages of high energy conversion rate, environmental friendliness, low starting temperature and reliable performance. It has shown broad application prospects in electric vehicle power supply, mobile power supply, micro power supply and small power generation device. At pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24H01M4/90G01N27/30
CPCY02E60/50
Inventor 易清风张玉晖
Owner HUNAN UNIV OF SCI & TECH
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