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http://hdl.handle.net/2289/6910
Title: | Synergistic Hybrid Catalyst for Ethanol Detection: Enhanced Performance of Platinum Palladium Bimetallic Nanoparticles Decorated Graphene on Glassy Carbon Electrode |
Authors: | Anupam Kumar, Manne Patnaik, Sai Gourang Lakshminarayanan, V. Ramamurthy, .Sai Sathish |
Keywords: | ethanol sensor graphene palladium platimun |
Issue Date: | 24-Mar-2018 |
Publisher: | Springer |
Citation: | Journal of Analytical Chemistry, 2018, Vol. 73, p. 266–276. |
Abstract: | The present study highlights the first time use of hybrid synergy electrocatalysis to design a cost effective, non-enzymatic ethanol sensor. The nanohybrid has been synthesized by decorating platinum palladium bimetallic nanoparticles (Pt‒PdNPs) on graphene nanosheets (G/Pt‒PdNPs). Field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, electrochemical measurements and UV-Vis spectrophotometry have been used to characterize the nanocomposite. An ethanol oxidation current of 332 μA was obtained with the use of G/Pt‒PdNPs modified glassy carbon electrode (GCE) that is 167 times higher than that of bare GCE in cyclic voltammetry studies with a potential scan rate of 50 mV/s in 0.1 M NaOH as the supporting electrolyte. Chronoamperometry studies have shown a distinct increase in the current for increasing concentration of ethanol with a wide range of linearity extending from 5 mM to 3 M and a detection limit of 1 mM with the use of G/Pt‒PdNPs. Quantum mechanical modeling using density functional theory was used to arrive at the minimization energies of G/Pd, G/Pt and G/Pt‒Pd in the presence and absence of ethanol. The improved catalytic activity of G/Pt‒PdNPs nanocomposite for ethanol detection is on account of the cooperative effects of Pt and PdNPs, coupled with the high conducting nature of graphene. |
Description: | Restricted Access. |
URI: | http://hdl.handle.net/2289/6910 |
ISSN: | 1061-9348 1608-3199 (Online) |
Alternative Location: | https://link.springer.com/article/10.1134/S1061934818030073 |
Appears in Collections: | Research Papers (SCM) |
Files in This Item:
File | Description | Size | Format | |
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J of Anal. Che_Vol.73_p266-276.pdf Restricted Access | Restricted Access | 1.19 MB | Adobe PDF | View/Open Request a copy |
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