Question: A typical exchange current density, that for H + discharge at platinum, is 0.79 mA cm 2 at 25C. What is the current density at

A typical exchange current density, that for H⁺ discharge at platinum, is 0.79 mA cm⁻² at 25°C. What is the current density at an electrode when its overpotential is

(a) 10 mV,

(b) 100 mV,

Take α = 0.5.

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