Cyclic voltammetry redox peak potential separations ΔEp (mV) and peak current ratios Ipa/Ipc at 100 mV s−1 scan speed of the three redox probes: rutheniumhexaammine, ferrocenemethanol, and iridium chloride.
| Fe at% | 1 mM Ru(NH3)6 | 1 mM FcMeOH | 1 mM IrCl6 | |||
|---|---|---|---|---|---|---|
| ΔEp | I pa/Ipc | ΔEp | I pa/Ipc | ΔEp | I pa/Ipc | |
| ta-C | 101 | 0.856 | 88 | 0.955 | 122 | 0.950 |
| 2 | 59 | 0.920 | 61 | 0.986 | 63 | 0.980 |
| 5 | 61 | 0.916 | 61 | 0.983 | 68 | 0.986 |
| 10 | 61 | 0.907 | 61 | 0.986 | 59 | 0.990 |