| Sample | ECSA (m2∙g−1) | Onset potential (V) | △E1/2 (V) |
| JM20 | 75.19 | 0.923 | 0.785 |
| PCNF | 76.67 | 0.905 | 0.768 |
| PCNF- N-PCNF(PI-30%) | 70.5 | 0.926 | 0.79 |
| N-PCNF(PI-50%) | 31.63 | 0.902 | 0.77 |
| N-PCNF(PI-100%) | 15.41 | 0.887 | 0.743 |