A heterostructure NiCo-layered double hydroxide nanosheets/Co 3 O 4 Nanowires/Ni foam for the enhanced oxygen evolution reaction

Cobalt oxide (Co 3 O 4 ) is a promising non-noble metal electrocatalyst for oxygen evolution reaction (OER), but it is hard to provide competitive performance relative to noble metal catalysts. In this paper, Cobalt oxide (Co 3 O 4 ) nanowires/Ni foam (NF) for oxygen evolution reaction (OER) activity is enhanced by coupling NiCo-layered double hydroxide (NiCo-LDH) nanosheets on the surface. The prepared heterogeneous structure affects the electronic structure of Cobalt oxide (Co 3 O 4 ), improving the intrinsic activity and resulting in an enhanced oxygen evolution reaction (OER) performance. The overpotential is only required 143 mV to reach 20 mA·cm −2 in an alkaline environment (1-M KOH). This paper provides a potential strategy for high-efficiency oxygen evolution reaction (OER).