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

다국어 초록 (Multilingual Abstract)

<P>We demonstrate highly efficient electocatalytic activities of single crystalline RuO<SUB>2</SUB> nanorods grown on carbon fiber (CF), i.e., RuO<SUB>2</SUB> nanorod-CF hybrid microelectrode, prepared by a simple thermal annealing process from the Ru(OH)<SUB>3</SUB> precursor at 300 °C. The general electrochemical activity of a RuO<SUB>2</SUB> nanorod-CF microelectrode represents faster electron transfer for the [Fe(CN)<SUB>6</SUB>]<SUP>3–/4–</SUP> couple than that of the bare CF microelectrode which are confirmed from the cyclic voltammetry (CV) measurement. Also, the amperometric response for the H<SUB>2</SUB>O<SUB>2</SUB> oxidation is remarkably facilitated at the RuO<SUB>2</SUB> nanorod-CF microelectrode by not only the enlarged surface area but the high electrocatalytic activity of the RuO<SUB>2</SUB> nanorod material itself. Furthermore, a single microelectrode of RuO<SUB>2</SUB> nanorod-CF exhibits the superior tolerance to Cl<SUP>–</SUP> ion poisoning unlike Pt-based electrocatalysts, indicating the promising sensor candidate in physiological conditions.</P><P><B>Graphic Abstract</B>
<IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancham/2012/ancham.2012.84.issue-21/ac302334t/production/images/medium/ac-2012-02334t_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ac302334t'>ACS Electronic Supporting Info</A></P>