Electrodeposited Palladium Nanotubes on Nanoclusters Mosaic Basement for Electrooxidation of Hydrazine

Abstract

A series of electrochemically deposited palladium nanotubes (e-PdNTs) on nanoclusters (e-PdNCs) mosaic basement have been prepared with variation of cycle number and scan rate through a facile electrochemical deposition method using cyclic voltammetry (CV) technique in 20 mM HCl solution and have been used as an anode electrocatalyst for hydrazine (N2H4 oxidation reaction. The morphology and structure of the self-formed e-PdNTs catalysts have characterized by scanning electron microscopy. As observed, the size and amount of e-PdNTs increased with the increasing of cycle number and decreased with respect to the increasing of scan rate. The overall experimental parameters have determined that the superior and direct electrocatalytic N2H4 oxidation obtained with lowering NH3 formation upon 6 cycles deposited e-PdNTs at 50 mV s−1 scan rate in 0.1 M KOH solution than that of other prepared e-PdNTs and Pd/C in respect to the onset potential, current intensity and durability. The lower detection limit (3.6 μM) and the linear range of N2H4 (up to 14 mM) have also been determined on e-PdNTs via amperometry for further sensor application.