Which mechanism impedes complete NO oxidation to NO₂ within a catalytic converter at low exhaust temperatures?

💡 Explanation

At low exhaust temperatures, the equilibrium shifts towards NO because the reaction converting NO to NO₂ becomes less thermodynamically favorable, impeding complete oxidation. Therefore the equilibrium dominates, rather than surface poisoning, thermal degradation, or kinetic limits, especially as the catalyst effectiveness is optimized.

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