The effect of ammonia upon the electrocatalysis of hydrogen oxidation and oxygen reduction on polycrystalline platinum

▸ Ammonia poisoning on the catalysis of fuel cell reactions on platinum. ▸ Study conducted in a rotating ring-disk electrode setup. ▸ No effects on hydrogen oxidation. ▸ Severe activity decrease for oxygen reduction. ▸ Cathode activity loss can explain most of the losses in a fuel cell.