Magnetic field effects on electric behavior of [Fe(CN)₆]³⁻ at bare and membrane-coated electrodes

Figures & data

Figure 1 Peak currents in CVMs of 1 M aqueous KNO₃ solution with 6 mM K₃[Fe(CN)₆] at ν/mV s⁻¹=20 and 308±0.1 K as a function of the angle θ between the direction of a 6 T magnetic field and the electrode surface.

Figure 2 Effect of a 6 T magnetic field on CVMs of 1 M aqueous KNO₃ solution with 8 mM K₃[Fe(CN)₆] at ν/mV s⁻¹=50 and 308±0.1 K. Magnetic field, H: solid line, 0 T; broken line, 6 T.

Figure 3 Effects of a 6 T magnetic field on CVMs of 1 M aqueous KNO₃ solution with a mixture of 4 mM K₃[Fe(CN)₆] and 4 mM K₄[Fe(CN)₆] using Au electrodes without (A) and with (B) a 5-mm-long sleeve at ν/mV s⁻¹=50 and 308±0.1 K. Magnetic field, H: solid line, 0 T; broken line, 6 T.

Figure 4 Values of |i_pc|/i_pa in CVMs of K₃[Fe(CN)₆] solutions at ν/mV s⁻¹=20 and 308±0.1 K as a function of magnetic field intensity.

Figure 5 D_app for cathodic (solid line) and anodic processes (broken line) in CVMs of K₃[Fe(CN)₆] solutions as a function of magnetic field intensity.

Figure 6 CVMs of bare Au (broken line) and DODAC/Au electrodes (solid line) in 1 M aqueous KNO₃ solution with 10 mM K₃[Fe(CN)₆] at ν/mV s⁻¹=10 and 308±0.1 K.

Figure 7 CVMs of DODAC/Au system in 1 M aqueous KNO₃ solution with 10 mM K₃[Fe(CN)₆] under steady magnetic fields at ν/mV s⁻¹=10 and 308±0.1 K. The magnetic fields were applied perpendicular to the electrode surface.

Figure 8 Peak data of DODAC/Au systems obtained from the CVMs in figure 7 as a function of magnetic field intensity. (A) Potential, E(V): anodic, ▪; cathodic, •; formal, ♦. (B) Peak-to-peak separation potential, ΔE_p (V). (C) Peak current, i_p (μA): anodic, ▪; cathodic, •.

Figure 9 Logarithm of the apparent electron transfer rate constant k_app of DODAC/Au system as a function of magnetic field intensity. The values of k_app were estimated from Laviron's equation using CV data.