High catalytic activity of Au-PEDOT nanoflowers toward electrooxidation of glucose

Dash, Sthitaprajna and Munichandraiah, N (2013) High catalytic activity of Au-PEDOT nanoflowers toward electrooxidation of glucose. In: Journal of The Electrochemical Society, 160 (11). H858-H865.

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Abstract

Electrochemically deposited porous film of poly(3,4-ethylenedioxythiophene) (PEDOT) on carbon paper current collector is used as the substrate for electrochemical deposition of Au. PEDOT facilitates the formation of Au nanoflowers with an enhanced electrochemical active surface area, when compared with sub-micron size Au particles deposited on bare carbon paper electrode. Owing to enhanced surface area of Au nanoflowers, the Au-PEDOT/C electrode shows greater activity than Au/C electrode toward electrooxidation of glucose in 0.5 M NaOH electrolyte. Cyclic voltammetry studies show that the peak current density increases with increase in concentrations of glucose and NaOH in the electrolyte. H-1-NMR spectroscopy data indicates that sodium formate and gluconate are the primary products of electrooxidation of glucose on Au-PEDOT/C electrode. Repetitive cyclic voltametry and amperometry studies suggest that the electrochemical stability of Au-PEDOT/C electrode is higher than that of Au/C electrode. Thus, electrochemically deposited nanostructured Au on PEDOT/C is an efficient catalyst for direct glucose oxidation in alkaline media. (C) 2013 The Electrochemical Society. All rights reserved.

Item Type:	Journal Article
Publication:	Journal of The Electrochemical Society
Publisher:	Electrochemical Society Inc
Additional Information:	Copyright of this article belongs to Electrochemical Society Inc.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	20 Dec 2013 09:01
Last Modified:	20 Dec 2013 09:01
URI:	http://eprints.iisc.ac.in/id/eprint/48084

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