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← ScienceWhich consequence results when a catalytic converter's cerium oxide is thermally aged?
A)Reduced oxygen storage capacity✓
B)Increased platinum surface dispersion
C)Enhanced rhodium catalytic activity
D)Improved nitrogen oxide reduction
💡 Explanation
Reduced oxygen storage occurs because sintering decreases surface area via Ostwald ripening, a thermodynamic process that reduces total surface energy; therefore cerium oxide's oxygen buffering diminishes rather than other noble metal activities within the converter under normal operating conditions.
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