Construction of Feooh Modified Comxoy (M = Mo, W, V) on Nickel Foam for Highly Efficient Oxygen Evolution Reaction

Recently, Cobalt molybdate (CoMoO 4 ) has been deemed as a promising catalyst in the field of electrocatalysis due to its high activity and stability. However, it is limited by weak electrical conductivity and energy density. Here, a rational approach to improve the catalytic performance of CoMoO 4 nanomaterial was reported. In this paper, CoMoO 4 precursor with nanoflower structure was synthesized on nickel foam using a typical hydrothermal method. Then, CoMoO 4 was etched with ultra-thin nanosheet structure by being briefly immersed in iron nitrate solution with room temperature, and its unique 3D structure could promote interfacial electron transfer as well as provide abundant active sites, which exhibited excellent electrocatalytic activity. More importantly, FeOOH-CoMoO 4 /NF requires an overpotential of 209 mV to achieve the current density of 10 mA cm -2 in 1 M KOH solution. Meanwhile, the material exhibits excellent catalytic durability of up to 24 h, which is promising for practical applications in energy conversion. Thus, this work offers a viable strategy as to assemble remarkable OER electrocatalysts.