Patent ID: 9692060
Date: 2017-06-27
CPC Classifications: B01J,B82Y,C01B,C01P,H01M,Y02E

Claim:
1. A particulate carbon catalyst in which particles having a particle diameter of 20 nm or more and 1 μm or less account for a volume fraction of at least 55% and a content of nitrogen atoms relative to carbon atoms in the particulate carbon catalyst is 0.5 atomic % or more and 8 atomic % or less; wherein the particles contain metal atoms in amount of 0.0045 or more and 0.0430 or less in mass ratio relative to carbon atoms in the particulate carbon catalyst, wherein the metal atoms are at least one kind selected from the group consisting of iron, cobalt, nickel, copper, tin, manganese, and zinc atoms; wherein the particles are spherical; wherein the average value of the sphericity T defined by the following equation for randomly selected 10 or more particles is 0.80 or more and 0.95 or less: wherein L is the circumferential length of the particle on a planar image of particles, S is the area of the particle on the image, and π is circumference ratio.