E 0 = 0.215 V vs Ag/AgCl (0.002), k 0 = 0.010 cm s -1 (0.005) α = 0.521 (0.006), C dl = 20.1 µF cm -2 (4.5), R u = 15.2 Ω (21.0). Intriguingly, experiment-to-experiment variation in α is very small. That is, its value lies in a very narrow range of about 0.515 to 0.525 with a standard deviation of just 0.006. It is also notable that while the value of R u covers a range from zero to about 35 Ω, it is always small. This means that the more important ohmic drop term that can distort voltammograms also is small and hence not highly significant.