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Highly Efficient Electrochemical Responses on Single Crystalline Ruthenium-Vanadium Mixed Metal Oxide Nanowires

Title
Highly Efficient Electrochemical Responses on Single Crystalline Ruthenium-Vanadium Mixed Metal Oxide Nanowires
Authors
Chun, SH[Chun, Sung Hee]Choi, HA[Choi, Hyun-A]Kang, M[Kang, Minkyung]Koh, M[Koh, Moonjee]Lee, NS[Lee, Nam-Suk]Lee, SC[Lee, Sang Cheol]Lee, M[Lee, Minyung]Lee, Y[Lee, Youngmi]Lee, C[Lee, Chongmok]Kim, MH[Kim, Myung Hwa]
DGIST Authors
Lee, SC[Lee, Sang Cheol]
Issue Date
2013-09-11
Citation
ACS Applied Materials and Interfaces, 5(17), 8401-8406
Type
Article
Article Type
Article
Keywords
CatalysisChemistryCrystalline MaterialsCrystallizationCyclic VoltammetryDielectric SpectroscopyElectro-Chemical Impedance Spectroscopy (EIS)ElectrocatalystElectrocatalystsElectrochemical AnalysisElectrochemical ResponseElectrochemical TechniquesElectrodeElectrodesElectrolytic ReductionExperimental ConditionsFerrocyanideFerrocyanidesFerrocynGoldH2O 2 ReductionHydrogen PeroxideKineticsMetallic CompoundsMicroelectrodesMixed Metal OxideMixed OxideMixing RatiosNanowireNanowiresOxideOxidesOxygen Reduction ReactionRutheniumRuthenium-Vanadium Mixed OxideSingle-CrystallineVanadiumVapor Phase Transport
ISSN
1944-8244
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. © 2013 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/1152
DOI
10.1021/am4016445
Publisher
American Chemical Society
Related Researcher
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Collection:
ETCETC
Convergence Research Center for Future Automotive Technology1. Journal Articles


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