Catalyst-carrier carbon material, solid-polymer fuel cell catalyst, solid-polymer fuel cell, and method for manufacturing catalyst-carrier carbon material

A carbon material for catalyst carrier use excellent in both durability and power generation performance under operating conditions at the time of low humidity, in particular both durability of a carbon material for catalyst carrier use with respect to repeated load fluctuations due to startup and shutdown and power generation performance under operating conditions at the time of low humidity, and a catalyst for solid-polymer fuel cell use prepared using the same etc. are provided. To solve this technical problem, according to one aspect of the present invention, there is provided a carbon material for catalyst carrier use satisfying the following (A) to (D): (A) an oxygen content O ICP of 0.1 to 3.0 mass% contained in the carbon material for catalyst carrier use; (B) a residual amount of oxygen O 1200°C of 0.1 to 1.5 mass% remaining after heat treatment in an inert gas (or vacuum) atmosphere at 1200°C; (C) a BET specific surface area of 300 to 1500 m 2 /g; and (D) a G-band half-width ”G of 30 to 70 cm -1 detected in a range of 1550 to 1650 cm -1 of the Raman spectrum.