Estimated values of the diffusion layer thickness, d, at ΔE~300 mV vs. SCE for CVs of 5 mM ferrocyanide in 0.1 M KCl (vs. SCE) using scan rates of 10, 30, 50, 100, 150, 200, 300, 400 mV-1 at the NBMn-PPh electrode.

Table 1: Estimated values of the diffusion layer thickness, d, at ΔE~300 mV vs. SCE for CVs of 5 mM ferrocyanide in 0.1 M KCl (vs. SCE) using scan rates of 10, 30, 50, 100, 150, 200, 300, 400 mV^-1 at the NBMn-PPh electrode.

Scan rate	δ (µm)	Category	δ to d
10	172	4	δ >> d
30	99	4	δ >> d
50	77	4	δ >> d
100	54	4	δ >> d
150	44	4	δ >> d
200	38	4	δ >> d
300	31	4	δ >> d
400	27	4	δ >> d