Table 1. Comparison of catalyst activity in the OER* †.
| Catalyst | η@J=10 mA cm−2 (mV) | J@η=0.4 V (mA cm−2) | Tafel slope (mV dec−1) | Mass activity @η=0.4 V (A g−1) | TOF @η=0.4 V (s−1) | J (3,000 th) @η=0.45 V (mA cm−2) |
|---|---|---|---|---|---|---|
| Co3O4@CoO SC | ||||||
| (@pH 13.6) | 430 | 5.85 | 89 | 234.0 | 0.0487 | 12.15 |
| (@pH 6.5) | 851 | — | 375 | — | — | — |
| IrO2 (@pH 13.6) | 411 | 9.26 | 91 | 370.4 | 0.2152 | 3.10 |
| RuO2 (@pH 13.6) | 358 | 38.5 | 55 | 1,540.0 | 0.5309 | 2.63 |
*Dry loading amount: 25 μg cm−2.
†All measurements were performed using an identical catalyst amount (25 μg cm−2) and rotating disk electrode (RDE) voltammetry upon a glassy carbon (GC) disk.