Which outcome reduces catalyst effectiveness over extended fuel cell operation?

💡 Explanation

Active site poisoning diminishes the reaction rate because contaminants block the active surface during adsorption; this impacts performance. Therefore, surface poisoning is chosen—rather than bulk effects— because these mechanisms don't directly affect the available active sites.

• Which phenomenon dominates when attempting to model electron transport through quantum dot using trial wave functions?
• Which outcome occurs when a Josephson junction contains excessive copper oxide?
• Which phenomenon causes spectral broadening in femtosecond laser pulses?
• Which outcome occurs when compressing a gas-phase reaction at equilibrium with fewer moles of product than reactants?
• Which consequence occurs when a molecular orbital's energy level lowers?
• Which effect occurs when microwave radiation interacts with strongly polar liquids, causing dielectric heating?