Platinum Mass Activity

What this topic covers

Catalytic performance normalized to platinum mass.

Core energy-system ideas

Mass activity expresses catalyst activity relative to the amount of platinum.

It helps compare catalyst designs that use different metal loadings.

Laboratory mass activity does not by itself predict complete stack cost or lifetime.

Important tradeoffs

Catalyst loading should be evaluated together with mass activity, transport, manufacturing and durability.

Material and performance evidence

Water, heat, gas purity and transient operation can change how effectively platinum catalyst layers perform.

Lifecycle perspective

The stack contains much more than platinum, so catalyst improvement does not eliminate balance-of-plant constraints.