Fig. 2

a Chronoamperometric Cottrell plots for 610-nm PDA film in 0.5 M H2SO4 aqueous solution. Inset: PDA current decay after application of potential (–0.2 V vs. Ag/AgCl). b Schematic image of proton exchange reaction in PDA film
a Chronoamperometric Cottrell plots for 610-nm PDA film in 0.5 M H2SO4 aqueous solution. Inset: PDA current decay after application of potential (–0.2 V vs. Ag/AgCl). b Schematic image of proton exchange reaction in PDA film