Single Carbon Fiber Decorated with RuO2 Nanorods as a Highly Electrocatalytic Sensing Element

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• 作者：Minkyung Kang ; Yumin Lee ; Hayoung Jung ; Jun Ho Shim ; Nam-Suk Lee ; Jeong Min Baik ; Sang Cheol Lee ; Chongmok Lee ; Youngmi Lee ; Myung Hwa Kim
• 刊名：Analytical Chemistry
• 出版年：2012
• 出版时间：November 6, 2012
• 年：2012
• 卷：84
• 期：21
• 页码：9485-9491
• 全文大小：420K
• 年卷期：v.84,no.21(November 6, 2012)
• ISSN：1520-6882

文摘

We demonstrate highly efficient electocatalytic activities of single crystalline RuO₂ nanorods grown on carbon fiber (CF), i.e., RuO₂ nanorod-CF hybrid microelectrode, prepared by a simple thermal annealing process from the Ru(OH)₃ precursor at 300 掳C. The general electrochemical activity of a RuO₂ nanorod-CF microelectrode represents faster electron transfer for the [Fe(CN)₆]^{3鈥?4鈥?/sup> couple than that of the bare CF microelectrode which are confirmed from the cyclic voltammetry (CV) measurement. Also, the amperometric response for the H₂O₂ oxidation is remarkably facilitated at the RuO₂ nanorod-CF microelectrode by not only the enlarged surface area but the high electrocatalytic activity of the RuO₂ nanorod material itself. Furthermore, a single microelectrode of RuO₂ nanorod-CF exhibits the superior tolerance to Cl鈥?/sup> ion poisoning unlike Pt-based electrocatalysts, indicating the promising sensor candidate in physiological conditions.}