Hierarchical CuO@ZnCo LDH heterostructured nanowire array toward enhanced water oxidation electrocatalysis
It is of great importance to design and develop complex heterostructured nanocatalysts with superior electrochemical performance to single-structured ones. Here, we report on the hydrothermal fabrication of hierarchical heterostructure of CuO@ZnCo layered double hydroxide nanowire array on copper foil (CuO@ZnCo LDH/CF). As a self-supported electrocatalyst for water oxidation, such CuO@ZnCo LDH/CF is superior in catalytic activity with the need of a low overpotential of 270 mV to attain 10 mA cm-2 in 1.0 M KOH. In addition, it also shows strong durability to maintain its activity for at least 24 h.