Platinum Electrodeposition on in-Situ Grown Prussian Blue Nanostructures and Reduced Graphene Oxide Composite for Synergistic Methanol Oxidation

Abstract

We report a synthesis for in-situ growth of Prussian blue nanostructures (PB NSs) at the amine functionalized silicate sol–gel matrix (TPDT)–RGO composite via the electrostatic interaction. Pt nanostructures are electrodeposited onto the preformed ITO/TPDT–RGO–PB electrode to prepare the RGO/PB/Pt catalyst. The significance of the present method is that the PB NSs are in-situ grown by inter-connecting the RGO layers, led to 3D porous nanostructure. The modified electrodes are characterized by FESEM, EDAX, XRD, XPS and electrochemical techniques. The RGO/PB/Pt catalyst exhibits synergistic electrocatalytic activity and high stability towards methanol oxidation. The porous nature of the TPDT and PB, and unique electron transfer mediating behavior of PB integrated with RGO in the presence of Pt nanostructures, facilitated synergistic electrocatalytic activity for methanol oxidation.