Fig. 2From: Efficient Dye-Sensitized Solar Cells Made from High Catalytic Ability of Polypyrrole@Platinum Counter ElectrodeCyclic voltammograms and EIS. CVs of the Pt, PPy, and PPy@Pt CEs at scan rate of 50 mV·s−1 (a); the stability of the PPy@Pt CE for 40-cycle CVs (b); CVs for the PPy@Pt electrode with different scan rates and the redox peaks current versus square root of scan rates (c); EIS of the Pt, PPy, and PPy@Pt CEs for I−/I3 − redox couple (d) Back to article page