Electroreduction of Copper Dichloride Powder to Copper Nanoparticles in an Ionic Liquid

Figure 6

SEM images of the copper nanoparticles prepared by electro-reduction of the CuCl₂ powder on a Ni foil in C₃OHmimBF₄/Cl at (a) −1.7 V, 80°C, 400 s; (b) −1.5 V, 80°C, 400 s; (c) −1.7 V, 40°C, 1200 s; and (d) −1.8 V, 40°C, 1200 s (versus Ag/Ag⁺).

(a)

(b)

(c)

(d)