Figure 1.

Polarization curves of 1 mg·mL⁻¹ azure A in 0.02 M KF (A), K₂SO₄ (B) and SDS (C) aqueous solutions at a scan rate of 10 mV·s⁻¹ between −0.25 V and 1 V. The voltammetry cycle starts at 0.5 V. (D) Charge accumulation during the electrochemical reactions of PAA(anion) electrosynthesis calculated from the voltammetric cycles shown in (A–C) and Figure S1.