Fig. 6From: Efficient Nickel Sulfide and Graphene Counter Electrodes Decorated with Silver Nanoparticles and Application in Dye-Sensitized Solar CellsTafel curves of the symmetrical Pt, graphene, NiS, NiS/Gr, NiS/Ag, and NiS/Gr-Ag CEs for I −/I 3 − redox coupleBack to article page