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Table 3.1 Fitting parameters from Figure 3.5(a), L = 0.1 and ΔE0` = E0`app- E0`.

Simulated data Adsorption-free fitting + HOPG,FcTMA  / mol cm-2 ΔE0` / mV k0 app / cm s-1 dapp / nm Competition mode SG/TC mode Competition mode SG/TC mode Competition mode SG/TC mode 0 0 0 5.0 5 50 50 1.1 ×10-10 (22 %) 4 0 5.0 ≥14 50 49 1.53×10-10 (30 %) 4 0 4.8 ≥14 50 48 2.0 ×10-10(40 %) 4 0 4.6 ≥14 50 47 2.6 ×10-10 (50 %) 4 0 4.0 ≥14 50 46

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Table 3.2 Fitting parameters from Figure 3.7(a), L = 0.1.

Simulated data Adsorption-free fitting

k0 / cm s-1 ΔE0` / mV k0 app / cm s-1 dapp / nm Competition mode SG/TC mode Competition mode SG/TC mode Competition mode SG/TC mode 10 3 0 5.0 ≥ 14.0 53 45 5 3 -5 3.0 ≥ 14.0 53 45 1 0 -6 0.8 1.2 53 46 0.5 -9 -9 0.5 0.5 53 47

Table 3.3 Fitting parameters from Figure 3.7(b), k0 = 5 cm s-1

Simulated data Adsorption-free fitting

L ΔE0` / mV k0 app / cm s-1 dapp / nm Competition mode SG/TC mode Competition mode SG/TC mode Competition mode SG/TC mode 0.1 3 -5 3.0 ≥ 15.0 53 45 0.15 3 -7 3.0 ≥ 10.0 83 66 0.2 3 -10 2.2 ≥ 8.0 117 83 0.25 2 -12 1.9 ≥ 7.0 154 99 0.3 2 -15 1.6 ≥ 6.0 190 112

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3.8.

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