Table 4 Results of values of the two current Arrhenius parameters Ea(T) and lnA_ct(T) obtained by Eqs. 17 and 18.

T	T	lnR_ct	Linear Regression		Non Linear Regression
T	T	lnR_ct	Ea	lnA_ct	Ea(T)	lnA_ct(T)
°C	K	–	kJ mol⁻¹	–	kJ mol⁻¹	–
HCl
20	293.15	9.6747	52.976	− 12.310	78.428	− 22.502
30	303.15	8.6028			68.658	− 18.637
40	313.15	7.8220			59.511	− 15.034
47.56^a	320.71^a	7.3389^c			52.85^b	− 12.355^b
60	333.15	6.7072			42.866	− 8.7680
80	353.15	5.9092			28.105	− 3.6625
			R² = 0.98176^d		σ = 0.0260^e	σ = 0.0057^e
H₂SO₄
20	293.15	9.8341	83.287	− 24.546	105.57	− 33.480
30	303.15	8.4154			97.018	− 30.076
40	313.15	7.2657			89.009	− 26.920
47.56^a	320.71^a	6.5191^c			83.34^b	− 24.569^b
60	333.15	5.4067			74.433	− 21.465
80	353.15	3.9823			61.508	− 16.965
			R² = 0.99440^d		σ = 0.0279^e	σ = 0.0127^e
H₃PO₄
20	293.15	10.244	102.268	− 31.733	117.19	− 37.836
30	303.15	8.9660			111.46	− 35.255
40	313.15	7.4844			106.10	− 33.265
47.56^a	320.71^a	6.5063^c			102.24^b	− 31.798^b
60	333.15	4.9097			96.341	− 29.871
80	353.15	3.2910			87.688	− 26.573
			R² = 0.99589^d		σ = 0.0389^e	σ = 0.0173^e

(a): Crossover temperature T_cr (Fig. 3). (b); current Arrhenius parameters Ea(T) and lnA_ct(T) calculated with Eqs. 17 and 18, respectively. (c): logarithm of charge transfer resistance (lnR_ct) estimated with Eq. 13. (d): from²². (e): Standard deviation σ.

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