| Pair anode/cathode | IL | Time reaction (h) | Yield of POTV (%) |
| Pt/Grafitte | C8mimPF6 | 3 | 11.6 |
| ITO-PET/Graphite | C8mimPF6 | 2 | <5a |
| ITOglass/Graphite | C8mimPF6 | 2 | <5 |
| Pt/Pt | C8mimPF6 | 4 | 22 |