Journal
ANALYST
Volume 137, Issue 5, Pages 1182-1189Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2an15957k
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Funding
- National Natural Science Foundation of China [21073094, 21005039]
- NSFC and Yunnan Province [U1137602]
- Natural Science Foundation of Jiangsu Higher Education Institutions of China [10KJB150007]
- University Postgraduate Research and Innovation Project in Jiangsu Province [CX10S_036Z]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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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 selfassembled 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 perpendicular to 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 x 10(-9) M), a wide linear range (9.0 x 10(-7) similar to 5.0 x 10(-4) M), as well as good stability, selectivity and reproducibility.
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