Preparation of Nanostructured Pd-C-Ru Composite Electrodes for Alcohol Electrooxidations. Part-I: A Study of Ethanol Oxidation by Cyclic Voltammetry and Impedance Spectroscopy

摘要

Ternary nanocomposite films of Pd, Ru and nanocarbon (C) are obtained on glassy carbon (GC) and studied byXRD, TEM, cyclic voltammetry (CV), impedance and chronoamperometric techniques for their use as electrocatalysts forethanol oxidation reaction (EOR). Results show that introduction of Ru to the Pd-0.5wt%C composite electrode increasesthe electrocatalytic activity greatly. It is observed that with Ru addition from 1 to 50 wt%, the rate for EOR initiallyincreases, attains a maximum (at 20wt %) and declines thereafter. Further, among the electrocatalysts investigated, the Pd-0.5wt%C-20wt% Ru electrode has displayed the greatest electrocatalytic activity. This electrode has nearly two timeshigher activity than the base electrode (Pd-0.5wt%C).