Electrochemical aspects of Pt–Cu and Cu modified boron‐doped diamond

Abstract

The synthesis of boron‐doped diamond (BDD) electrodes, decorated with Pt–Cu or pure Cu nanoparticles is described in this study. A two‐step electrochemical method involving the electrodeposition of Cu, followed by Pt was used to synthesise the former. The electrochemical activity of the Pt–Cu/BDD electrode was evaluated towards the methanol oxidation and was compared with the catalytic activity of the Pt/BDD electrode itself. Higher current densities and less fouling at Pt–Cu/BDD catalysts during methanol oxidation is seen compared to the Pt alone. Also, a simple and cost effective method to modify BDD electrode using Cu nanoparticles was explored. High sensitivity and current response to glucose oxidation in KOH is observed as well as good reproducibility and stability. Selectivity of the Cu/BDD towards glucose in KOH is observed in the presence of low concentrations of interfering species.