Which mechanism fundamentally limits a fuel cell's power output?

💡 Explanation

The activation energy barrier limits fuel cell output because reactants require overcoming an initial energy input to start electrochemical reactions, therefore slowing kinetics rather than electrolyte conductivity or catalyst poisoning which are secondary factors.

• Which consequence occurs when laser light encounters impurities inside optical fiber?
• Which outcome occurs when extreme compression increases within neutron stars?
• Which risk increases when mapping spacetime near black hole?
• Which phenomenon reduces performance when high-pressure steam undergoes expansion across turbine stages?
• Which mechanism causes zero DC resistance in Niobium-Titanium composites operating within an MRI?
• Which mechanism weakens molecular binding in heated polymers?