The same analysis was carried out with all the compositederived
sensors.
Figure 2 shows the voltammetric response of the one prepared with NiCu alloy (69:31 wt % Ni/Cu)
nanoparticles. The redox process of the Ni(II)/Ni(III) pair also takes place (peaks I and II), but the corresponding
voltammetric signals appeared to be overlapped with those ones produced by the oxidation of Cu and the formation of Cu
oxides and hydroxides.