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Redox Flow Batteries Vanadium to Earth Quinones

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Redox Flow Batteries Vanadium to Earth Quinones ( redox-flow-batteries-vanadium-earth-quinones )

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Figure 9.1 – Effects of a potential change on the standard free energies of activation for oxidation and reduction. The right frame is a magnified picture of the boxed area. Let us call that fraction 1-α, where α is the transfer coefficient, can range from zero to unity, depending on the shape of the intersection region. Thus, (9.3) A brief study of the figure also reveals that at potential E the cathodic barrier, ΔG‡c , is higher than ΔG‡0c by αF(E-E0’); therefore, (9.4) Now let us assume that the rate constants kf and kb have an Arrhenius form that can be expressed as Inserting the activation energies, (9.3) and (9.4), gives (9.5) (9.6) (9.7) 214

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Redox Flow Batteries Vanadium to Earth Quinones

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