The catalyst layer is the place where the electrochemical reaction of hydrogen and oxygen in the fuel cell generates electric current, which is the core of the hydrogen fuel cell. Platinum is the most commonly used catalyst for oxygen reduction and hydrogen oxidation reactions in PEM fuel cells. The key to catalysts is surface area rather than weight, so the common practice of catalysts is to uniformly disperse tiny platinum particles (4nm or smaller) with large surface area A carbon-supported platinum catalyst was obtained on the surface of carbon powder with high mesoporous area. To minimize cell potential losses due to proton mobility rates and penetration of reactive gases deep into the electrocatalyst layer, the catalyst layer should be fairly thin. At the same time, the metal active surface area should be maximized, and the Pt particles should be as small as possible.

General Properties