Synthesis of Silver Palladium alloy based on graphene for alkaline anionic membrane fuel cell

We report a PdAg/graphene catalyst for the ethanol oxidation in alkaline media. Graphene is synthesized from graphite electrodes using ionic liquid-assisted electrochemical exfoliation. graphene-supported Pd-Ag electrocatalystis then reduced by ethylene glycol with as a stabilizing agent to prepare highly dispersed PdAg nanoparticles on carbon graphene to use as ethanol oxidation in direct ethanol fuel cell (DEFC) catalysts. X-ray diffractometer and scanning electron microscopy technique are used to investigate the crystallite size and the surface morphologies respectively. The electrochemical characteristics of the PdAg/graphene,Pd/graphene and Sn/graphene catalysts are investigated by cyclic voltammetry (CV) in nitrogen saturated sulfuric acid aqueous solutions and in mixed sulfuric acid and ethanol aqueous solutions. The catalytic activities of the PtAg/graphene,Pt/grapheneand Sn/graphene electrodes for ethanol oxidation is 800 A g-1 Pd and 400 and 0 A g-1 Pd, which can be revealed the particularproperties of the exfoliated graphene supports and PdAg alloy. Furthermore, PtAg/graphene exhibited a better sensitivity,signal-to-noise ratio, and stability than commercial Pd/graphene.

Alkaline fuel cell, Ethanol oxidation, Platinum silver nanoparticle