title: Highly efficient electrochemical responses on single crystalline ruthenium-vanadium mixed metal oxide nanowires.
abstract: Highly efficient single crystalline ruthenium-vanadium mixed metal oxide (Ru1-xVxO2, 0≤x≤1) nanowires were prepared on a SiO2 substrate and a commercial Au microelectrode for the first time through a vapor-phase transport process by adjusting the mixing ratios of RuO2 and VO2 precursors. Single crystalline Ru1-xVxO2 nanowires show homogeneous solid-solution characteristics as well as the distinct feature of having remarkably narrow dimensional distributions. The electrochemical observations of a Ru1-xVxO2 (x=0.28 and 0.66)-decorated Au microelectrode using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) demonstrate favorable charge-transfer kinetics of [Fe(CN)6]3-/4- and Ru(NH3)6(3+/2+) couples compared to that of a bare Au microelectrode. The catalytic activity of Ru1-xVxO2 for oxygen and H2O2 reduction at neutral pH increases as the fraction of vanadium increases within our experimental conditions, which might be useful in the area of biofuel cells and biosensors.
authors: Department of Chemistry & Nano Science, Global Top5 Research Program, Ewha Womans University , Seoul 120-750, Korea.
authors: Sung Hee
authors: SH
authors: Chun
authors: Hyun-A
authors: HA
authors: Choi
authors: Minkyung
authors: M
authors: Kang
authors: Moonjee
authors: M
authors: Koh
authors: Nam-Suk
authors: NS
authors: Lee
authors: Sang Cheol
authors: SC
authors: Lee
authors: Minyung
authors: M
authors: Lee
authors: Youngmi
authors: Y
authors: Lee
authors: Chongmok
authors: C
authors: Lee
authors: Myung Hwa
authors: MH
authors: Kim
mesh_terms: D002384:Catalysis; D003460:Crystallization; D058266:Dielectric Spectroscopy; D055664:Electrochemical Techniques; D004566:Electrodes; D005295:Ferrocyanides / Q000737:chemistry; D006046:Gold / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D007700:Kinetics; D053770:Nanowires / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry*; D014639:Vanadium / Q000737:chemistry*
chemical_list: D005295:Ferrocyanides; D010087:Oxides; C116383:ferrocyn; D014639:Vanadium; D006046:Gold; D012428:Ruthenium; D006861:Hydrogen Peroxide