Platinum at the Fuel-Cell Anode

What this topic covers

Hydrogen oxidation and why relatively small platinum loadings can be effective.

Core energy-system ideas

At the anode, hydrogen molecules are electrochemically split into protons and electrons.

Platinum is highly active for this hydrogen-oxidation reaction.

Hydrogen purity matters because some contaminants can strongly affect catalyst performance.

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.