Concept:
Chemistry - Fuel Cells and Catalysts.
Step 1: Understand role of electrode metal.
In fuel cells, certain metals are coated on electrodes to act as catalysts and speed up oxidation-reduction reactions.
Step 2: Identify suitable catalyst metal.
Transition/noble metals like platinum and palladium are commonly used because they adsorb gases like hydrogen and enhance reaction rate.
Step 3: Choose correct option.
Among given options, Palladium is the correct catalytic metal.
Step 4: Final answer.
[
\boxed{\text{Palladium}}
]
Hence, correct option is (C).