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

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...

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