785023.fig.005a
(a)
785023.fig.005b
(b)
Figure 5: Cyclic voltammetry of porous WO3 electrode performed between −3 V and +3 V with a scan rate of 50 mV in 0.1 M HClO4-PC electrolyte: (a) 1 cycle and (b) 10, 100, and 1000 cycles.