Figure 4: Tafel-polarization curves and Arrhenius plots of LogRct and LogJo versus temperature.
From: Rational screening low-cost counter electrodes for dye-sensitized solar cells

(a) Current–voltage characteristics of the symmetrical (CE//IL//CE) cells fabricated with two identical α-Fe2O3 and Pt electrodes at 20 °C. (b) Charge-transfer resistance–temperature (left ordinate) and exchange current density–temperature data (right ordinate) in the Arrhenius coordinates with different CEs: α-Fe2O3 (blue line) and Pt (red line).