Carbon-based material, electrode catalyst, oxygen reduction electrode catalyst, gas diffusion electrode, aqueous solution electrolytic device, and production method for carbon-based material

An electrode catalyst, carbon-based technology, which is used in catalyst activation/preparation, chemical instruments and methods, solid electrolyte fuel cells, etc., can solve the problems of platinum rarity, unstable cost, and high cost, and achieve the effect of excellent performance

Active Publication Date: 2014-08-06
PANASONIC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, platinum is rare and expensive, and its cost is not stable

Method used

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  • Carbon-based material, electrode catalyst, oxygen reduction electrode catalyst, gas diffusion electrode, aqueous solution electrolytic device, and production method for carbon-based material
  • Carbon-based material, electrode catalyst, oxygen reduction electrode catalyst, gas diffusion electrode, aqueous solution electrolytic device, and production method for carbon-based material
  • Carbon-based material, electrode catalyst, oxygen reduction electrode catalyst, gas diffusion electrode, aqueous solution electrolytic device, and production method for carbon-based material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] In a reactor, 3 g of graphite (Wako 40 mm), 138 mL of concentrated sulfuric acid, and 3.47 g of potassium nitrate were mixed to prepare a mixture liquid. Potassium permanganate was further slowly added thereto while the reactor was in an ice bath. Subsequently, the mixture liquid thus obtained was stirred at 40° C. for 30 minutes, and then 240 mL of ion-exchanged water was added thereto, followed by stirring and heating at 90° C. for 1 hour. After that, 600 mL of ion-exchanged water and 18 mL of 30% hydrogen peroxide solution were added to the reactor to complete the reaction. After that, the resulting mixture liquid was washed with hydrochloric acid and water, followed by dialysis to remove ions therefrom. Further, ultrasonic waves were applied to the obtained mixture liquid to separate graphene oxide.

[0146] The graphene oxide thus obtained was dried. Thereafter, to 200 mg of the dried graphene oxide were added a 0.1M aqueous solution of iron(III) chloride and a ...

Embodiment 2 and 3

[0149] In Example 2, the amount of an aqueous solution of 0.1 M iron(III) chloride was adjusted so that the percentage of Fe atoms to graphene was 17% by mass. In Example 3, the amount of an aqueous solution of 0.1 M iron(III) chloride was adjusted so that the percentage of Fe atoms to graphene was 30% by mass. Except for these, in the same manner as those of Example 1, and under the same conditions as those of Example 1, carbon-based materials according to Examples 2 and 3 were prepared.

reference example 1

[0155] In Reference Example 1, in the step of heating the sample containing graphene oxide, iron(III) chloride, and pentaethylenehexamine, the heating time was two hours. Other than that, in the same manner as those of Example 2, and under the same conditions as those of Example 2, a carbon-based material according to Reference Example 1 was prepared.

[0156] [Raman spectroscopy]

[0157] Graphite (Wako 40 mm), graphene oxide produced from this graphite in the aforementioned manner, and the carbon-based materials obtained in Example 2, Comparative Examples 1 and 2 were analyzed by Raman spectroscopy. image 3 The Raman spectrum thus obtained is shown. image 3 Among "A", "B", "C", "D", and "E" respectively represent graphite, graphene oxide, and the Raman spectra of the carbon-based materials obtained in Example 2 and Comparative Examples 1 and 2 .

[0158] as in image 3 As shown in , the results confirm that each Raman spectrum has 2 )-C(sp 2 ) bond G-band peak (right...

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Abstract

Provided is a carbon-based material having high catalytic activity. This carbon-based material comprises a graphene doped with a metal atom and at least one type of non-metallic atom selected from a nitrogen atom, a boron atom, a sulfur atom, and a phosphorous atom. The ratio, for the carbon-based material, between the maximum peak intensity derived from an inactive metal compound and a metal crystal, and the (002) surface peak intensity in a rocking curve obtained by x-ray diffraction measurement using a CuKalpha ray is no more than 0.1.

Description

technical field [0001] The present invention relates to a carbon-based material suitable for use as a catalyst; an electrode catalyst and an oxygen-reducing electrode catalyst each comprising a carbon-based material; a gas diffusion electrode comprising at least one of the electrode catalyst and the oxygen-reducing electrode catalyst; and a method for producing 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] In general, platinum is widely used as a catalyst in various devices to allow the oxygen reduction reaction to proceed. [0005] However, platinum is rare and expensive, and its cost is not stable. Therefore, the use of platinum poses many problems in view of saving natural resources, ensuring availability, reducing cos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B01J27/24B01J37/02B01J37/16C25B11/06H01M4/90H01M8/10
CPCB82Y30/00H01M4/90C01B31/0438B01J37/02C01B31/02C25B1/00B01J27/24C25B11/03B01J37/16C25B11/12B82Y40/00H01M8/10H01M4/02C25B1/46C25B11/04C01B2204/20C01P2002/70C01B32/05C01B32/182C01B32/194C25B11/043H01M4/96Y02E60/50
Inventor 中西周次釜井亮铃木雄也桥本和仁神谷和秀
Owner PANASONIC CORP
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