Table 1

Comparison of catalytic parameters of amorphous and crystalline metal oxide OER catalysts.

Ecat
(V vs. RHE)
Tafel slope
(mV dec−1)
Reference
a-FeOx1.55 ± 0.0240 ± 4(27)
a-CoOx1.44 ± 0.0242 ± 2(27)
a-NiOx1.42 ± 0.0173 ± 6(27)
a-FeCoOx1.41 ± 0.0133 ± 5(27)
a-FeNiOx1.44 ± 0.0124 ±4(27)
a-FeCoNiOx1.42 ± 0.0131 ± 3(27)
a-CoPi*1.5160 (28)
a-NiBi1.5358 (14)
a-MnOx1.5976 (16)
LaNiO31.3843 (7)
Co3O41.4045 (29)
RuO21.3640 (9)
IrO21.4440 (30)

*Pi = phosphate.

†Bi = borate.

‡Crystalline phases.