TABLE 2.
Redox potentials of ESs and Coulombic efficiencies in MES.
| Electron shuttles | Standard redox potentiala(V vs. Ag/AgCl) | Experimental redox potential (V vs. Ag/AgCl) | Coulombic efficiency |
|---|---|---|---|
| NR | −0.54 | −0.56 ± 0.04 | 81.3 ± 4.2% |
| MV | −0.65 | −0.68 ± 0.08 | 78.0 ± 6.5% |
| AR | −0.55 | −0.56 ± 0.03 | 89.5 ± 1.8% |
| RF | −0.42 | −0.44 ± 0.02 | 82.2 ± 4.6% |
| BV | −0.57 | −0.58 ± 0.06 | 97.6 ± 1.5% |
| AQS | −0.44 | −0.46 ± 0.02 | 77.4 ± 2.4% |
| PMS | — | −0.24 ± 0.07 | 75.6 ± 5.4% |
a
The standard redox potential was derived from the previous studies (The references were listed in the Supplementary Matreial), and the electrode potential of Ag/AgCl (3M KCl) against standard hydrogen electrode (SHE) is +0.210 V.