Nippon Steel Chemical & Material Co., Ltd.

Wakana Tada

Kazuyoshi Masaki

Hiroyuki Hayashida

Takashi Iijima

Kenichiro Tadokoro

Shinya Furukawa

Masataka Hiyoshi

Tomoko Komura

A carbon material for use as a catalyst carrier for a polymer electrolyte fuel cell which is a porous carbon material and satisfies at the same time (1) the content of a crystallized material is 1.6 or less, (2) the BET specific surface area obtained by a BET analysis of a nitrogen gas adsorption isotherm is from 400 to 1500 m/g, (3) the cumulative pore volume Vwith respect to a pore diameter of from 2 to 10 nm obtained by an analysis of a nitrogen gas adsorption isotherm using the Dollimore-Heal method is from 0.4 to 1.5 mL/g, and (4) the nitrogen gas adsorption amount Vbetween a relative pressure of 0.95 and 0.99 in a nitrogen gas adsorption isotherm is from 300 to 1200 cc (STP)/g, and the method of producing the same.

Carbon material for use as catalyst carrier of polymer electrolyte fuel cell and method of producing the same

Provided are a carbon material for a catalyst carrier of a polymer electrolyte fuel cell, the carbon material being a porous carbon material and simultaneously satisfying (1) an intensity ratio (I/I) of an intensity at 750° C. (I) and a peak intensity in a vicinity of 690° C. (I) is 0.10 or less; (2) a BET specific surface area is from 400 to 1,500 m/g; (3) an integrated pore volume Vof a pore diameter of from 2 to 10 nm is from 0.4 to 1.5 mL/g; and (4) a nitrogen gas adsorption amount Vat a relative pressure of from 0.95 to 0.99 in the nitrogen gas adsorption isotherm is from 300 to 1,200 cc(STP)/g, as well as a method of producing the same.

Carbon material for catalyst carrier of polymer electrolyte fuel cell and method of producing the same

The present invention is a carbon material for a catalyst carrier of a polymer electrolyte fuel cell, which has a three-dimensional dendritic structure, and simultaneously satisfies the following (A), (B), and (C). (A) By a laser Raman spectroscopic analysis with a wavelength of 532 nm, a standard deviation &#x3b4;(R) of an intensity ratio (R value) of an intensity of a D-band (near 1360 cm) to an intensity of a G-band (near 1580 cm) measured with a beam diameter of 1 &#x3bc;m at 50 measurement points is from 0.01 to 0.07. (B) A BET specific surface area Sis from 400 to 1520 m/g. (C) A nitrogen gas adsorption amount Vduring a relative pressure (p/p) from 0.4 to 0.8 is from 100 to 300 cc(STP)/g. A method of producing such a carbon material for a catalyst carrier is also included.

Carbon material for catalyst carrier of polymer electrolyte fuel cell, and method of producing the same

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Tokyo, Japan

Wakana Tada