Figure 10

(a) SEM images for surface morphology. (b) Cross-section of the CoS acicular nanorod arrays (ANRAs) prepared at a 24 h reaction time. The inset of a depicts a large-scale SEM image of the corresponding ANRAs. (c) Cyclic voltammetry (CV) curves. (d) Stability test of the ANRAs in the electrolyte. Adapted from Kung et al.87 Copyright © 2012 American Chemical Society.