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![Anodization fabrication techniques and energy-related applications for nanostructured anodic films on transition metals](https://image.oaes.cc/a039050a-9503-4666-9b1b-8c75a4ec1d39/5260.fig.5.jpg)
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.