Platinum Nanoflower-Modified Electrode as a Sensitive Sensor for Simultaneous Detection of Lead and Cadmium at Trace Levels

Figure 4

SEM images of GCE (a); PtNFs/GCE deposited at potential of 0.2 V (b), 0.0 V (c), −0.2 V (d), −0.3 V (e), and −0.5 V (f). Solution of 0.1 M·H₂SO₄ containing 1.0 mM·H₂PtCl₆; stirring at 50 rpm.