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Which mechanism increases hydrogen production rate in an electrochemical cell using a platinum catalyst?

A)Enhanced hydrogen adsorption onto platinum surfaces
B)Reduced electrolyte ionic conductivity limits
C)Increased activation energy barrier height
D)Decreased platinum surface area availability

💡 Explanation

Enhanced hydrogen adsorption onto platinum sites increases hydrogen production because the catalytic activity speeds up the reaction by lowering the activation energy barrier via the mechanism of surface adsorption, therefore more hydrogen is produced with catalyst, rather than kinetic limitations or surface area reduction.

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