Issue 5, 2012

Ferric ion immobilized on three-dimensional nanoporous gold films modified with self-assembled monolayers for electrochemical detection of hydrogen peroxide

Abstract

A fast, simple square wave potential method is developed for the fabrication of a three-dimensional (3D) nanoporous gold (NPG) film. The nanostructures are characterized and confirmed by scanning electronic microscopy (SEM) and cyclic voltammetry (CV). The nanostructures modified with self-assembled monolayers (SAMs) are employed as an electrode substrate to immobilize inorganic iron(III) ion. After immobilization, iron(III) ion undergoes an effective direct electron transfer reaction with a pair of well-defined redox peak at −256 ± 10 mV (pH 7.0). The iron(III) ion modified electrode displays the excellent electrocatalytic performance for reduction of hydrogen peroxide, and thus can be used as an electrochemical sensor for detecting hydrogen peroxide with a low detection limit (1.0 × 10−9 M), a wide linear range (9.0 × 10−7∼5.0 × 10−4 M), as well as good stability, selectivity and reproducibility.

Graphical abstract: Ferric ion immobilized on three-dimensional nanoporous gold films modified with self-assembled monolayers for electrochemical detection of hydrogen peroxide

Supplementary files

Article information

Article type
Paper
Submitted
12 Oct 2011
Accepted
07 Dec 2011
First published
06 Jan 2012

Analyst, 2012,137, 1182-1189

Ferric ion immobilized on three-dimensional nanoporous gold films modified with self-assembled monolayers for electrochemical detection of hydrogen peroxide

M. Zheng, P. Li, C. Yang, H. Zhu, Y. Chen, Y. Tang, Y. Zhou and T. Lu, Analyst, 2012, 137, 1182 DOI: 10.1039/C2AN15957K

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