Highly Efficient Electrochemical Responses on Single Crystalline Ruthenium-Vanadium Mixed Metal Oxide Nanowires
- 주제(키워드) ruthenium-vanadium mixed oxide , nanowire , electrocatalyst , H2O2 reduction , oxygen reduction reaction
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2013
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000086980
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/am4016445
초록/요약
Highly efficient single crystalline ruthenium-vanadium mixed metal oxide (Ru1-xVxO2, O <= 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.
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