Electrocatalyst of negative electrode of fuel cell as well as preparation method and application thereof

A fuel cell cathode, electrocatalyst technology, applied in battery electrodes, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as performance attenuation, achieve low cost, improve durability, and increase the effect of diversification

Active Publication Date: 2014-03-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the activity and stability of this catalyst under alkaline conditions are superior to commercial Pt/C cata

Method used

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  • Electrocatalyst of negative electrode of fuel cell as well as preparation method and application thereof
  • Electrocatalyst of negative electrode of fuel cell as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0049] Example 1:

[0050] Put the prepared aniline hydrochloride solution (5mL aniline+3mL 37.5%HCl+14mL H 2 O) 10 mL. After stirring for 30 minutes, 1mol / L HCl solution was added dropwise to adjust the solution pH=3.0. After reacting for 1h, 25mL 0.5mol / L(NH 4 ) 2 S 2 O 8 The solution was slowly dropped into the above solution, phenylphosphine was added to it, the molar ratio of N:P was 10:1, and then 0.36g Co(NO 3 ) 2 ·6H 2 O, after stirring uniformly, polymerize at room temperature for 12 hours, evaporate to dryness, wash, and after drying at 85°C, treat it in an ammonia atmosphere at 900°C for 3 hours to obtain a black powder; then ball mill it with a ball mill for 3 hours to obtain Phosphorus and boron co-doped nano-carbon electrocatalyst with ordered nano-structure.

Example Embodiment

[0051] Example 2:

[0052] Put the prepared aniline hydrochloride solution (5mL aniline+3mL 37.5%HCl+14mL H 2 O) 10 mL. After stirring for 30 minutes, 1mol / L HCl solution was added dropwise to adjust the solution pH=3.0. After 1h reaction, 25mL 0.5mol / L(NH 4 ) 2 S 2 O 8 The solution was slowly dropped into the above solution, phenylphosphine was added to it, the molar ratio of N:P was 10:1, and then 0.35g Fe(NO 3 ) 3 ·6H 2 O, after stirring uniformly, polymerize at room temperature for 12 hours, then evaporate and wash, and after drying at 85°C, treat it in an ammonia atmosphere at 900°C for 3 hours to obtain black powder; put the above powder into 1M acidic aqueous solution , Acid treatment for 1 hour, washing the metal in the catalyst; then ball milling it with a ball mill for 3 hours to obtain an ordered nanostructured P and N co-doped nanocarbon electrocatalyst.

[0053] figure 1 Comparison of the oxygen reduction polarization curves before and after the life test of the catal...

Example Embodiment

[0055] Example 3:

[0056] Put the prepared polythiophene hydrochloride solution (10mL aniline+6mL 37.5%HCl+28mL H 2 O) 20 mL. After stirring for 30 minutes, 1mol / L HCl solution was added dropwise to adjust the solution pH=3.0. After reacting for 1h, 25mL 0.5mol / L(NH 4 ) 2 S 2 O 8 The solution was slowly dropped into the above solution, phenylphosphine was added to it, the molar ratio of N:P was 30:1, and then 0.36g Co(NO 3 ) 2 ·6H 2 O, after stirring uniformly, polymerize at room temperature for 12 hours, evaporate, wash, and dry at 85°C, treat it in an ammonia atmosphere at 900°C for 3 hours to obtain black powder; then use a ball mill for 3 hours to obtain Doped nano carbon electrocatalyst with ordered nano structure.

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Abstract

The invention relates to an electrocatalyst of a negative electrode of a fuel cell as well as a preparation method and application of the electrocatalyst. The catalyst adopts a conductive polymer as a reaction precursor, the conductive polymer is polymerized under the acid and oxidation condition to obtain polyaniline, the polyaniline is additionally provided with transition metal salt, and a phosphorus compound and/or a boron compound as a precursor, and the mixture is dried and is subjected to pyrolysis at the high temperature to obtain the electrocatalyst. The catalyst is N, phosphorus and/or boron co-doped nanometer carbon with a porous nanometer structure; the total mass percent of the doped heteroatom is 0.2 to 15 percent, the mass ratio of N to phosphorus and/or boron is 5:1 to 100:1, the weight percentage of metal is 0.1 to 10 percent, and the mass percent of the nanometer carbon is 75.0 to 99.7 percent.

Description

technical field [0001] The present invention relates to a cathode electrocatalyst for fuel cells and its preparation method and application thereof, in particular to the preparation and application of a nitrogen, phosphorus and / or boron co-doped nano-carbon electrocatalyst, which can be used as Cathodic electrocatalysts for proton exchange membrane fuel cells (PEMFC) and direct methanol fuel cells (DMFC). Background technique [0002] A fuel cell is an electrochemical energy conversion device that directly converts chemical energy present in fuels and oxidants into electrical energy. Due to its advantages of high energy density and environmental friendliness, it is considered to be one of the preferred clean and efficient power generation technologies in the 21st century. Electrocatalyst is one of the key materials of fuel cells, and its activity and stability directly determine the performance and service life of fuel cells. The currently widely used fuel cell cathode oxy...

Claims

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Application Information

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IPC IPC(8): H01M4/90B01J27/24B01J35/10
CPCY02E60/50H01M4/8605H01M4/9008H01M4/926
Inventor 张华民钟和香许壮毛景霞柳丝丝邱艳玲
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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