Table 1.

Comparison of overpotential of different POM related heterogeneous OER catalysts

Compound	Op @ 1mA/cm2	Reference
[Ni(2,2-bpy)3]5[PW11NiO39(H2O)]2 · 1.08H2O	591 mV	Wang et al., 201671
Ni(2,2-bpy)3]1.5[Ni(2,2-bpy)2(H2O)BW12O40]	632 mV	Wang et al., 201671
{[Ni(2,2bpy)3]1.5[Ni(2,2bpy)2(H2O)PW12O40] }2-	616 mV	Wang et al., 201671
{[NiII(2,2′-bpy)2(H2O)][NiII(2,2′-bpy)3]1.5} [H(CoIIW12O40)]·2H2O}	457 mV	Singh et al., 201860
([NiL](PF6)2 (L = bis(2-pyridyl-methylimidazolylidene) methane)	800 mV @ 0.65 mA/cm2	Shahadat et al., 201972
5,15-diphenylporphinatonickel(II)	400 mV @ 0.7 mA/cm2	Krishna et al., 201873
[H6CoW12O40] @ ZIF-8	784.19 mV	Mukhopadhyay et al., 201836
Co-POM-TMOS	300 mV @ 2 mA/cm2	Present Work