MoS 2 Nanosheets Uniformly Anchored on NiMoO 4 Nanorods, a Highly Active Hierarchical Nanostructure Catalyst for Oxygen Evolution Reaction and Pseudo‐Capacitors

Hierarchical nanostructures have attracted considerable research attention due to their applications in the catalysis field. Herein, we design a versatile hierarchical nanostructure composed of NiMoO 4 nanorods surrounded by active MoS 2 nanosheets on an interconnected nickel foam substrate. The as‐prepared nanostructure exhibits excellent oxygen evolution reaction performance, producing a current density of 10 mA cm −2 at an overpotential of 90 mV, in comparison with 220 mV necessary to reach a similar current density for NiMoO 4 . This behavior originates from the structural/morphological properties of the MoS 2 nanosheets, which present numerous surface‐active sites and allow good contact with the electrolyte. Besides, the structures can effectively store charges, due to their unique branched network providing accessible active surface area, which facilitates intermediates adsorptions. Particularly, NiMoO 4 /MoS 2 shows a charge capacity of 358 mAhg −1 at a current of 0.5 A g −1 (230 mAhg −1 for NiMoO 4 ), thus suggesting promising applications for charge‐storing devices.