fig5

Figure 5. Morphologies of CuO nanofilms: (A-C) SEM images taken at different magnifications; (D) TEM image. Cyclic voltammograms of (E) different electrodes at 10 mV s^-1 and (F) CuO nanofilm electrode at various scan rates. The inset of (A) shows an SEM image of the bare Cu foam^[125]. Reproduced from Ref.^[125] with permission from the American Chemical Society.