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← ScienceWhich outcome limits power density despite high hydrogen flux through a PEM fuel cell's membrane?
A)Increased platinum catalyst surface passivation
B)Elevated proton transport activation energy
C)Reduced electrode-electrolyte surface area”,
D)Accelerated hydrogen crossover induced corrosion✓
💡 Explanation
Hydrogen crossover causes corrosion because hydrogen permeates the membrane reacting at the cathode, rather than combining at the anode; therefore membrane degradation accelerates, limiting power, rather than causing passivation due to a chemical imbalance.
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