Controlled electrochemical polypyrrole and carbon nanotube co-deposition onto platinum electrodes

Both carbon nanotubes (CNTs) and polypyrrole (PPy) have been investigated as materials for manufacturing high charge-transfer electrodes due to their outstanding performances. In this work, PPy and chemically-functionalized multi-walled CNTs (COOH-MWCNTs) and single-walled CNTs (COOH-SWCNTs) were electrodeposited from an aqueous solution to form a nanocomposite on the surface of platinum metal electrodes using different techniques. A study of the influence of experimental parameters such as current, charge and growth rate in the different electrodeposition methods was performed. The electronic and electrochemical properties of the nanocomposite films have been studied by cyclic voltammetry and electrochemical impedance spectroscopy, while a morphological study has been performed via scanning electron microscopy (SEM). A comparison between the different deposition techniques is reported.