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A robust Mn@FeNi-S/graphene oxide nanocomposite as a high efficiency catalyst for the non-enzymatic electrochemical detection of hydrogen peroxide†

Abstract

Exploring high-efficiency, stable, and cost-effective electrocatalysts for electrochemical activities is greatly desirable and challenging. Herein, a newly designed hybrid catalyst with manganese-doped FeNi-S encapsulated into graphene oxide (Mn@FeNi-S/GO) with unprecedented electrocatalytic activity is developed by a simple one-step heating treatment and followed by sonication. X-ray powder diffraction (XRD), scanning electron microscope (SEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and N2 sorption isotherm demonstrate that successful formation of Mn@FeNi-S/GO. The electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) further confirm kinetic-favourable adsorption of hydrogen peroxide (H2O2) on surface sites of Mn@FeNi-S/GO. Additionally, the synergetic effects between Mn@FeNi-S and GO are regarded as significant contributors to an efficient electron transfer path and promote the capture of H2O2 in hybrid catalysts. Under an optimal biosensor-based Mn@FeNi-S/GO electrode exhibits a high sensitivity (8.929 μA μM−1 cm−2) and detection limit of 8.84 nM with a wide detection range for H2O2 and excellent selectivity, and is capable of online monitoring of H2O2 derived from apple juice and human blood serum

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Supplementary files

Article information


Submitted
26 Oct 2019
Accepted
21 Jan 2020
First published
11 Feb 2020

Nanoscale, 2020, Accepted Manuscript
Article type
Paper

A robust Mn@FeNi-S/graphene oxide nanocomposite as a high efficiency catalyst for the non-enzymatic electrochemical detection of hydrogen peroxide†

S. Manavalan, J. Ganesamurthi, S. M. Chen, P. Veerakumar and K. Murugan, Nanoscale, 2020, Accepted Manuscript , DOI: 10.1039/C9NR09148C

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