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Carbon-based material, electrode catalyst, electrode, gas diffusion electrode, electrochemical device, fuel battery, and process for producing carbon-based material

A technology of carbon-based materials and carbon sources, which is applied in catalyst activation/preparation, solid electrolyte fuel cells, fuel cells, etc., can solve the problems of rare, expensive, and unstable cost of precious metals, and achieve the effect of easy acquisition and improved catalytic activity

Active Publication Date: 2015-01-28
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, these precious metals are rare and expensive, and their cost is not stable

Method used

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  • Carbon-based material, electrode catalyst, electrode, gas diffusion electrode, electrochemical device, fuel battery, and process for producing carbon-based material
  • Carbon-based material, electrode catalyst, electrode, gas diffusion electrode, electrochemical device, fuel battery, and process for producing carbon-based material
  • Carbon-based material, electrode catalyst, electrode, gas diffusion electrode, electrochemical device, fuel battery, and process for producing carbon-based material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0243] 3 g of graphite in particle shape (median diameter: 6 μm), 0.1 M aqueous solution of iron(III) chloride, and 0.15 M ethanol solution of pentaethylenehexamine were added to a container to prepare a mixture. The amount of the 0.1M aqueous solution of iron(III) chloride used was chosen so that the percentage of iron atoms relative to the graphite was 10% by mass. Ethanol was further added to the mixture so that the total volume of the resulting mixture was 9 mL. The resulting mixture was subjected to ultrasonic dispersion, and then dried at 60° C. using a drier. The result was a sample containing graphite, iron(III) chloride and pentaethylenehexamine.

[0244] The sample thus obtained was placed at the end of a quartz tube, and the atmosphere inside the quartz tube was replaced with argon. The quartz tube was inserted into an oven at 900° C., left for 45 seconds, and then taken out. Adjust the heating rate at the beginning of heating the sample to 300 °C / s by adjusting ...

Embodiment 2

[0247] The carbon-based material in Example 2 was prepared in the same manner and under the same conditions as in Example 1, except that 0.1M cobalt chloride aqueous solution was used instead of ferric chloride as the metal source.

Embodiment 3

[0249] The carbon-based material in Example 3 was prepared in the same manner and under the same conditions as in Example 1, except that 0.1M manganese chloride aqueous solution was used instead of ferric chloride as the metal source.

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Abstract

The carbon-based material according to the present invention has been doped with non-metallic atoms, e.g., nitrogen atoms, and metallic atoms. In a radial distribution function obtained by subjecting the K-edge EXAFS of the metallic atoms to Fourier transform, the ratio of the intensity (A) for the maximum peak appearing around the coordination bond distance between a metallic atom and a non-metallic atom to the intensity (B) for the maximum peak appearing around the metallic-bond distance between metallic atoms, A / B, is 4.0 or higher. However, if the metallic atoms are platinum atoms, the A / B ratio in a radial distribution function obtained by subjecting the LIII-edge EXAFS of the platinum atoms to Fourier transform is 4.0 or higher.

Description

technical field [0001] The present invention relates to: a carbon-based material suitable for use as a catalyst; an electrode catalyst comprising the carbon-based material; an electrode and a gas diffusion electrode comprising the electrode catalyst; an electrochemical device and a fuel cell comprising the electrode or a gas diffusion electrode; The preparation method of the carbon-based material. Background technique [0002] The following oxygen reduction reaction is H 2 / O 2 Cathodic reactions in fuel cells, salt water electrolysis, etc., and play an important role in electrochemical energy conversion devices, etc. [0003] o 2 +4H + +4e - →2H 2 o [0004] The following oxygen evolution reaction, which is the reverse reaction of the oxygen reduction reaction, is an anodic reaction in water electrolysis and the like, and also plays an important role in electrochemical energy conversion devices and the like. [0005] 2H 2 O→O 2 +4H + +4e - [0006] To promote o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B01J27/24B01J37/08C25B11/12H01M4/88H01M4/90H01M4/96H01M8/10
CPCH01M4/96H01M8/10C01B31/02H01M4/88H01M4/90C25B11/12C01B31/04C01B32/05C01B32/21C25B11/043H01G11/32H01M2008/1095Y02E60/50H01M4/8605H01M4/9083H01M4/926Y02E60/13
Inventor 釜井亮中西周次铃木雄也北出祐基林隆夫
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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