Figure 6

Nyquist diagrams of NiO–Pt–H/B,1,10,P,1,10,PDNiPF6/CPE in the absence (a) and in the presence (b) of 1.0 mM serotonin and (c) with 1.0 mM cysteamine.
Nyquist diagrams of NiO–Pt–H/B,1,10,P,1,10,PDNiPF6/CPE in the absence (a) and in the presence (b) of 1.0 mM serotonin and (c) with 1.0 mM cysteamine.