Electrocatalytic properties of prussian blue nanoparticles supported on poly(m-aminobenzenesulphonic acid)-functionalised single-walled carbon nanotubes towards the detection of dopamine

► This study investigated the electron transfer behaviour and the catalysis of EPPGE modified with and without SWCNT-PABS/PB nanoparticles towards DA oxidation. ► The presence of Prussian blue (PB) significantly enhanced the electrocatalytic activity towards the oxidation of dopamine. ► The effect of the number of PB layers in EPPGE-SWCNT-PB electrodes on the DA current response was demonstrated. ► The modified electrode was used for the analysis of DA in real drug samples with satisfactory accuracy and reproducibility.