Fig. 5
Cyclic voltammograms recorded at the lead electrode at 65 °C at a scan rate of 10 mV s−1: a (a) blank cyclic voltammetry in the solvent with 0.08 M KBr, (b) as (a) + 0.11 M DMF, (c) as (a) + 0.33 M DMF, and (d) as (a) + 0.55 M DMF. b (a) Blank cyclic voltammetry in the solvent with 0.08 M KBr, (b) as (a) + 0.09 M NMP, (c) as (a) + 0.26 M NMP, and (d) as (a) + 0.44 M NMP. The solvent was 130 ml of co-solvent (MeOH/H2O = 9.83/1, volume ratio)