All potentials in this article are expressed versus a reversible hydrogen electrode (RHE).
Sample* | Onset η (V versus RHE) | Tafel slope (mV dec−1) | η10 mA/cm2 (V)† | |
This work | Literature | |||
a-FeOx | 0.33 | 38 | 0.24‡ | 0.40‡ (16) |
a-NiOx | 0.21 | 62 | 0.36 | 0.36 (15) |
a-Fe2Ni3Ox | 0.19 | 34 | 0.33 | 0.35§ (15) |
a-MnOx | 0.22 | — | 0.43‡ | 0.51‡ (16) |
a-IrOx¶ | 0.10 | 45 | 0.26 | 0.26 (15) |
*Ox is broadly defined as oxo/oxyl/hydroxo.
†Overpotential required to reach 10 mA/cm2, unless otherwise indicated, without correcting for mass transport.
‡Overpotential required to reach 1 mA/cm2; this value may be affected by stability issues at this pH. A Tafel slope value is not provided due to film instability under steady-state conditions.
§Corresponds to FeNiOx.
¶Recorded at pH 0; all other data in table recorded at pH 13.