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← ScienceWhich risk increases when a platinum catalyst promotes hydrogen dissociation?
A)Increased surface area for poisoning✓
B)Reduced catalyst thermal conductivity
C)Enhanced hydrogen diffusion rates
D)Decreased activation energy barrier
💡 Explanation
Increased surface area for reactants leads to adsorption, therefore increasing poisoning risk resulting from side reactions, because the mechanism of catalyst poisoning involves blocking active sites rather than directly affecting conductivity, rate or transition energies.
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