Table 2 Overview of the fitted EIS parameters of the electrodes
Impedance spectroscopy parameter (the percentage errors are in parentheses) | ||||||
|---|---|---|---|---|---|---|
Electrode | Rs (Ω) | Rct (Ω) | CPE (μF) | W (F) | N | X2 |
Bare GCE | 110 (3.78) | 8.73 (5.31) | 3.80 (16.7) | 226 (1.84) | 0.80 (1.26) | 0.555 |
Pc/GCE | 928 (4.42) | 0.89 (8.60) | 0.16 (79.6) | 85.1 (2.44) | 0.86 (9.30) | 0.357 |
Ni/GCE | 301 (2.03) | 1.39 (3.43) | 6.70 (16.3) | 524 (4.46) | 0.72 (2.91) | 0.215 |
fMWCNTs/GCE | 85 (2.32) | 0.44 (5.99) | 2644 (29.9) | 67 (3.31) | 0.97 (12.9) | 0.164 |
NiPcMWCNTs/GCE | 104 (0.94) | 0.18 (5.60) | 27.2 (4.85) | 148 (9.70) | 0.72 (0.94) | 0.507 |