Support carbon material and catalyst for solid polymer type fuel cell use

Abstract

A support carbon material able to support a catalyst metal in a highly dispersed state and resistant to the flooding phenomenon and with little voltage drop even at the time of large current power generation under high humidity conditions and a catalyst using the same, specifically, a support carbon material for solid polymer type fuel cell use comprised of a porous carbon material which has a pore volume and a pore area found by the BJH analysis method from a nitrogen adsorption isotherm in an adsorption process of a radius 2 nm to 50 nm pore volume VA of 1 ml/g to 5 ml/g and a radius 2 nm to 50 nm pore area S2-50 of 300 m2/g to 1500 m2/g and a ratio (V5-25/VA) of radius 5 nm to 25 nm pore volume V5-25 (ml/g) to said pore volume VA (ml/g) of 0.4 to 0.7 and a ratio (V2-5/VA) of radius 2 nm to 5 nm pore volume V2-5 (ml/g) to the same of 0.2 to 0.5 and a catalyst using the same.

Dependencies are inferred from the claim text.