Highly active oxygen evolution reaction electrocatalyst based on defective-CeO2-x decorated MOF(Ni/Fe)

ABSTRACT MOF(Ni/Fe) nanosheets were grown in situ vertically on three-dimensional (3D) nickel foam (NF). To induce a chemical coupling effect, defective CeO2-x nanoparticles (NPs) were chemically decorated on the surfaces of the MOF(Ni/Fe)/NF nanosheets. This phenomenon confirmed a positive effect for oxygen evolution in alkaline medium. The oxygen evolution reaction (OER) performance of the electrocatalysts reached an overpotential of ∼254 mV at j = 50 mA cm−2 with a Tafel slope of ∼34 mV dec−1.