| 摘要 |
A fuel cell electrode catalyst, adapted for application to a carbon fiber support mat substrate to form a fuel cell electrode, comprising small crystals of noble metal fuel cell catalyst specie, such as platinum, deposited on discrete particles of an inert carrier or support such as carbon powder, is formed by the repetitive process of: mixing the powder with a dilute solution of the salt so as to form a slurry, the slurry then being concentrated and dried followed by the decomposition of the salt to form a partial product which is then used in place of the carrier powder in a repetition of the process until the desired concentration of catalyst is achieved. Usage of a low concentration of catalyst salt results in a smaller crystallite, which yields a higher surface area of catalyst, for a more active electrode that provides an improved current/voltage performance characteristic at a lower cost. |
