The Redox Chemistry of Ruthenium Dioxide: A Cyclic Voltammetry Study—Review and Revision

Figure 16

Apparent diffusion coefficients at different scan rates: RuO₂/Ti electrode in 1 M NaOH at 25°C assuming one-electron transfer () and unit surface area (1 cm²) for reason of comparability. Fit quality: Ru-H ( = 0.9996; 0.1–0.4 V/s); possibly Ru(II)/(III) ( = 0.961; 0.1–0.5 V/s) and ( = 0.965; >0.5 V/s); Ru(III)/(IV) ( = 0.991); Ru(IV)/(VI) ( = 0.998; 0.1–0.5 V/s) and ( = 0.993; >1.0 V/s); Ru(VI)/(VII) ( = 0.9998; 0.1–0.3 V/s) and ( = 0.932, >0.3 V/s).