Reduction of the Electrode Overpotential of the Oxygen Evolution Reaction by Electrode Surface Modification

Figure 4

SEM images of Sn electrodeposition on the SS mesh at different electrodeposition currents and for different electrodeposition times: (a) electrodeposition of Ni underlayer; (b) 50 mA cm⁻² and 500 s; (c) 100 mA cm⁻² and 250 s; (d) 150 mA cm⁻² and 166 s; (e) 250 mA cm⁻² and 100 s; (f) 300 mA cm⁻² and 83 s.

(a)

(b)

(c)

(d)

(e)

(f)