Paper Title
CoOx/Au/Pd Nanoparticle-based Ternary Catalyst for a Reinforced Electrocatalytic Oxidation of Ethylene Glycol

Abstract
In this investigation, various Pd-based electrocatalysts for ethylene glycol (EG) electro-oxidation are introduced. The ternary CoOx/Au/Pd catalyst in which Pd nanoparticles (nano-Pd), Au nanoparticles (nano-Au), and cobalt oxide nanoparticles (nano-CoOx) are electrodeposited onto a glassy carbon (GC) substrate, respectively, introduces an enhanced catalysis towards ethylene glycol electro-oxidation (EGO). The current study reveals that the electrocatalytic activity of the catalyst toward EGO depends on the catalyst’s structure and composition. The surface morphology, composition, and crystallographic orientation are determined using FE-SEM, EDS, and XRD, respectively. Cyclic voltammetry (CV) is used to confirm the successful electrodeposition of the catalyst at the electrode’s surface and to probe its activity. The ternary catalyst,CoOx/Au/Pd, shows a higher catalytic activity towards EGO when compared to Pd catalyst and Au/Pdcatalyst;the oxidation peak current (Ip) obtained at CoOx/Au/Pdcatalystis about three times of that obtained at Pdcatalystand about one time and a half of that obtained at Au/Pdcatalyst.As well, CoOx/Au/Pd catalyst shows a significant negative shift in the onset potential, Eonset (ca. 100 mV) of EGO when compared to Pd catalyst. Moreover, CoOx/Au/Pd catalyst shows a high stability towards EGO as the current obtained at this catalyst remained at high value with continuous electrolysis. Keywords - Direct ethylene glycol fuel cells, Electrocatalysis, Pd nanoparticle, Au nanoparticles, CoOx nanoparticles.