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Table 2 Fitting impedance parameters of Nyquist plots using the equivalent circuit in Fig. 10b

From: Preparation of SnIn4S8/TiO2 Nanotube Photoanode and Its Photocathodic Protection for Q235 Carbon Steel Under Visible Light

Samples

Rs (Ω cm2)

Qf

Rf (Ω cm2)

Qdl

Rct (kΩ cm2)

103Y01(Sn·Ω−1 cm−2)

n1

103Y02(Sn·Ω−1 cm−2)

n2

Q235 CS

5.875

1.918

0.825

6.617

1.185

0.809

4.238

TiO2dark

5.220

1.603

0.813

20.84

3.080

0.934

1.343

SnIn4S8/TiO2dark

5.182

3.235

0.885

19.31

3.042

0.936

1.141

TiO2illumination

4.993

2.257

0.922

18.55

1.882

0.949

0.932

SnIn4S8/TiO2illumination

5.343

6.283

0.873

36.47

1.947

0.825

0.278

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