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Non-noble metal doped carbon felt, and application in catalyzing oxygen reduction

A non-precious metal, carbon felt technology, applied in the field of non-precious metal doped carbon felt, to achieve the effect of solving high cost, good stability and methanol poisoning resistance, and simple process

Inactive Publication Date: 2014-04-09
JILIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no reports of this kind of doped carbon felt with catalytic oxygen activity at home and abroad.

Method used

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  • Non-noble metal doped carbon felt, and application in catalyzing oxygen reduction
  • Non-noble metal doped carbon felt, and application in catalyzing oxygen reduction
  • Non-noble metal doped carbon felt, and application in catalyzing oxygen reduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Material preparation:

[0022] Soak 0.0727g of the carbon felt material in an aqueous solution of pyrrole, wherein the pyrrole solution is 30mL of water + 100uL of pyrrole, and soak at room temperature for 4 hours; react the removed carbon felt in an aqueous solution of 30mM ferric chloride hexahydrate for 4h, and after taking it out 60 Dry overnight at ℃, then soak the carbon felt in an aqueous solution containing 30mM cobalt chloride, take it out after 12 hours; then dry at 60℃ overnight. The dried sample was pyrolyzed at 800°C for 2 hours under nitrogen gas, and then cooled to 380°C to obtain a non-noble metal-doped carbon felt material.

[0023] Electrochemical Characterization:

[0024] The above-mentioned non-noble metal-doped carbon felt material was ground with a mortar, and then dispersed into a mixed solution of isopropanol, water, and naphthol to obtain a 2 mg / mL solution. Then take 10uL and drop it on the surface of the platinum ring electrode on the glass...

Embodiment 2

[0027] The preparation method is the same as 1, except that pyrrole is replaced with 0.08 g of 2,5-dimethylpyrrole, and the electrochemical characterization method is the same as 1. The kinetic current of cobalt and nitrogen doped carbon felt is 22.72mA cm at -0.3V -2 , Pt / C is 23.4mA cm -2 , indicating that the material has good catalytic activity. Its antitoxic effect and electron transfer number are close to the results of Example 1.

Embodiment 3

[0029] The preparation method is the same as 1, except that pyrrole is replaced with 0.06 g of 1-methylpyrrole, and the electrochemical characterization method is the same as 1. The kinetic current of cobalt and nitrogen doped carbon felt is 18.52mA cm at -0.3V -2 , has a very good anti-poisoning ability, and the electron transfer number is 3.3. slightly worse than Example 1.

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Abstract

The invention relates to a non-noble metal doped carbon felt, and an application in catalyzing oxygen reduction, and belongs to the technical field of fuel cells. Specifically, the invention provides a non-noble metal doped carbon felt with a three dimensional conductive structure prepared by methods of in-situ polymerization and non-noble metal coordination pyrolysis. The carbon felt can be used for electrochemically catalyzing the oxygen reduction. The non-noble metal doped carbon felt material takes a common carbon felt material as a skeleton, forms a polymer film on the carbon felt surface by in-situ polymerization of nitrogen-containing heterocyclic ring molecules, then absorbs cobalt atoms by a coordination effect and finally form a cobalt and nitrogen doped carbonized layer on the carbon felt surface. The carbon felt material is prepared by the invention. The non-noble metal doped carbon felt has similar capacity for catalyzing the oxygen reduction with that of a commercialized platinum catalyst, and has very good stability and methanol poisoning resistance.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and specifically relates to a non-noble metal-doped carbon felt with a three-dimensional conductive structure prepared by in-situ polymerization and non-noble metal coordination pyrolysis methods, and the carbon felt can be used for electrochemically catalyzing oxygen reduction. Background technique [0002] Fuel cells can directly convert chemical energy into electrical energy, and have the advantages of high energy conversion efficiency, cleanliness, and no pollution. Its technical characteristics meet the national green energy requirements and the basic national policy of low-carbon and sustainable development. According to the forecast of China Market Intelligence Center (CMIC), the global market of low-temperature fuel cells will reach 35 billion US dollars in 2013. At present, the main factor limiting the wide application of low-temperature fuel cells is their high cost. For example, th...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J32/00H01M4/90
CPCY02E60/50
Inventor 李振宇于泽生
Owner JILIN UNIV
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