Discussion
Which of the following metal is incorporated into the electrodes of fuel cell to increase the rate of reaction?
Answer: C
The metal is palladium.
In a hydrogen-oxygen fuel cell the gases are bubbled through porous carbon electrodes into the electrolyte. Finely divided platinum or palladium is incorporated into the electrodes as a catalyst, to increase the rate of the electrode reactions.
Nickel is used as a catalyst in some alkaline cells and in hydrogenation, but the standard answer for these electrodes is platinum or palladium. Zinc, tin and magnesium are reactive metals that would be consumed, not catalysts.
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