NiCo2O4 nanoframes with a nanosheet surface as efficient electrocatalysts for the oxygen evolution reaction

Abstract

NiCo₂O₄ nanoframes with a nanosheet surface are fabricated using Cu₂O nanoframes as a template. The size of the NiCo₂O₄ nanoframe is about 450 nm, and the thickness of the surface nanosheet is about 10 nm. Compared with Co₃O₄ and NiO nanoframes, NiCo₂O₄ nanoframes as electrocatalysts demonstrate much higher catalytic activity and stability for the oxygen evolution reaction (OER). The superior electrocatalytic performance of NiCo₂O₄ nanoframes might be attributed to the large surface area and synergistic effect of Ni and Co.