Palladium Nanoparticles Decoration on Graphene doped Nitrogen Using an E cho -friendly Reductant for Ethanol Oxidation

This document presents a Pd /N-graphene Pd/NRGO catalyst through a one-step strategy, for the ethanol oxidation in alkaline media. Graphene oxide is synthesized via modified hummer method. Pd nanoparticles then was reduced on graphene by green tea solution by making use of the reducing capability and the aromatic rings of tea polyphenol TP that contained in tea in presence and absence of urea as N-dopant agent to obtain Pd/NRGO and Pd/RGO. The electrochemical characteristics of the Pd/NRGO and Pd/RGO catalysts are investigated by cyclic voltammetry CV in nitrogen saturated alkaline aqueous solutions and in mixed alkaline and ethanol aqueous solutions. Detailed electrochemical studies involving chronoamperometry, cyclic voltammetry and linear sweep voltammetry prove that the electro-catalytic oxidation of ethanol at the Pd/NRGO is more stable, occurring at lower potential, giving lower Tafel slopes compared to Pd/RGO catalyst, which can reveal the particular properties of the nitrogen supports and Pd nanoparticles