Which outcome results when platinum catalyst surface area dramatically decreases in a catalytic converter?

💡 Explanation

When a catalyst's surface area decreases, the number of active sites for reactant molecules declines; therefore, the reaction rate decreases, leading to a lesser conversion of pollutants because fewer molecules react on the diminished surface. Reduced conversion occurs rather than backpressure, elevated temperatures, or housing corrosion, each requiring alternate failure modes.

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