Butler-Volmer: j = j₀·(exp(αfη) - exp(-(1-α)fη))

Butler-Volmer equation (Butler 1924; Erdey-Grúz & Volmer 1930) — the foundational current-overpotential law of electron-transfer electro-catalysis. Current density j depends exponentially on overpotential η = E - E_eq through the exchange…