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 Vof 1 ml/g to 5 ml/g and a radius 2 nm to 50 nm pore area Sof 300 m/g to 1500 m/g and a ratio (V/V) of radius 5 nm to 25 nm pore volume V(ml/g) to said pore volume V(ml/g) of 0.4 to 0.7 and a ratio (V/V) of radius 2 nm to 5 nm pore volume V(ml/g) to the same of 0.2 to 0.5 and a catalyst using the same.