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Which outcome occurs when platinum surfaces catalyze hydrogen dissociation?

A)Increased atomic hydrogen recombination rate
B)Reduced molecular hydrogen adsorption
C)Greater catalyst sintering occurs slowly
D)Lower surface oxidation reaction rate

💡 Explanation

Increased atomic hydrogen surface coverage accelerates hydrogen recombination through the Langmuir-Hinshelwood mechanism, because chemisorbed atoms readily combine. Therefore, recombination rates increase, rather than being limited by molecular adsorption or catalyst properties.

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