Polyoxotungstate/Oxy-Graphene Nanocomposite Multilayer Films For Electrocatalytic Hydrogen Evolution

Abstract

In this study, nanocomposites were formed together with Keggin-type K_7-xNa_xPW₁₁O₃₉∙14H₂O (POTs) clusters and oxygenated-graphene (Oxy-G). It was produced as a multilayer by layer-by-layer self-assembly method using protonated poly (ethylenimine) (PEI). The produced (PEI / POTs / Oxy-G) n multilayer films were controlled by XRD, cyclic voltammetry and UV-visible spectroscopy. (PEI / POTs / Oxy-G) n multilayers modified on a glassy carbon electrode and the hydrogen evolution reaction taking advantage of the electrocatalytic activity of this nanocomposite. Multilayer has been shown to exhibit a potentially good electrocatalytic activity at -0.4 V. A notable electrocatalytic hydrogen evolution reaction could be identified on the (PEI/ POTs/Oxy-G)_n multilayer. We demonstrate that expanded the application of POTs/G nanocomposites to the electrocatalysis of oxygen reduction reaction and hydrogen evolution reaction. This excellent approach will offer new insights into different electrode structure and the development of novel electroactive catalysts.

Keywords

• polyoxotungstate,multilayer graphene films,hydrogen evolution

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