. . "Specifically, platinization is a process of depositing or precipitating platinum (Pt) onto the surface of a catalyst support. [0089] ???Carbon black??? is a conductive acinoform carbon utilized, for example, as a catalyst support (defined above). [0090] ???Porosity,??? or permeability, can be used to refer to porosity of carbon black (i.e., difference in NSA and STSA surface area measurements), or" . .