Prussian Blue Based Nanoelectrode Arrays for H2O2 Detection

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• 作者：Arkady A. Karyakin ; Elena A. Puganova ; Igor A. Budashov ; Ilya N. Kurochkin ; Elena E. Karyakina ; Vladimir A. Levchenko ; Vladimir N. Matveyenko ; and Sergey D. Varfolomeyev
• 刊名：Analytical Chemistry
• 出版年：2004
• 出版时间：January 15, 2004
• 年：2004
• 卷：76
• 期：2
• 页码：474 - 478
• 全文大小：113K
• 年卷期：v.76,no.2(January 15, 2004)
• ISSN：1520-6882

文摘

We propose to form nanoelectrode arrays by depositionof the electrocatalyst through lyotropic liquid crystallinetemplates onto inert electrode support. Whereas PrussianBlue is known to be a superior electrocatalyst in hydrogenperoxide reduction, carbon materials used as electrodesupport demonstrate only a minor activity. We report onthe possibility for nanostructuring of Prussian Blue by itselectrochemical deposition through lyotropic liquid crystalline templates, which is noticed from atomic forcemicroscopy images of the resulting surfaces. The resultingPrussian Blue based nanoelectrode arrays in flow injection analysis mode demonstrate a sub-part-per-billiondetection limit (1 × 10^-8 M) and a linear calibration rangestarting exactly from the detection limit and extending over6 orders of magnitude of H₂O₂ concentrations (1 × 10^-8to 1 × 10^-2 M), which are the most advantageousanalytical performances in hydrogen peroxide electroanalysis.