| pH值 | Rs (Ω·cm2) | CPE1 (Ω−1·Sn·cm−2) | n1 | Rct1 (Ω·cm2) | CPE2 (Ω−1·Sn·cm−2) | n2 | Rct2 (Ω·cm2) |
| Cu | 6.965 | 1.108 × 10−5 | 0.977 | 30 | 8.496 × 10−5 | 0.545 | 4010 |
| 4.0 | 7.722 | 3.315 × 10−5 | 0.890 | 7345 | 5.903 × 10−5 | 0.402 | 22,222 |
| 5.0 | 7.986 | 3.031 × 10−5 | 0.898 | 9346 | 2.480 × 10−4 | 0.512 | 7398 |
| 6.0 | 7.355 | 3.820 × 10−5 | 0.888 | 7476 | 2.870 × 10−4 | 0.534 | 9172 |