Tuning the properties of CoFe-layered double hydroxide by vanadium substitution for improved water splitting activity

Abstract

Here, we demonstrate the enhanced water splitting activity of CoFe–LDH by vanadium substitution. Volcano plots are obtained for intrinsic water oxidation and hydrogen evolution with increasing vanadium substitution, and the best catalyst V_0.3–CoFe–LDH achieved 10 mA cm⁻² current density for H₂ and O₂ evolution merely at 98 mV and 240 mV overpotential, respectively.