Highly efficient electrochemical responses on single crystalline ruthenium-vanadium mixed metal oxide nanowires

Sung Hee Chun; Hyun A. Choi; Minkyung Kang; Moonjee Koh; Nam Suk Lee; Sang Cheol Lee; Minyung Lee; Youngmi Lee; Chongmok Lee; Myung Hwa Kim

doi:10.1021/am4016445

Highly efficient electrochemical responses on single crystalline ruthenium-vanadium mixed metal oxide nanowires

Sung Hee Chun, Hyun A. Choi, Minkyung Kang, Moonjee Koh, Nam Suk Lee, Sang Cheol Lee, Minyung Lee, Youngmi Lee, Chongmok Lee, Myung Hwa Kim

Division of Intelligent Robot

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Highly efficient single crystalline ruthenium-vanadium mixed metal oxide (Ru_1-xV_xO₂, 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 Ru_1-xV_xO₂ nanowires show homogeneous solid-solution characteristics as well as the distinct feature of having remarkably narrow dimensional distributions. The electrochemical observations of a Ru_1-xV_xO₂ (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 Ru_1-xV_xO₂ 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.

Original language	English
Pages (from-to)	8401-8406
Number of pages	6
Journal	ACS Applied Materials and Interfaces
Volume	5
Issue number	17
DOIs	https://doi.org/10.1021/am4016445
State	Published - 11 Sep 2013

Keywords

HO reduction
electrocatalyst
nanowire
oxygen reduction reaction
ruthenium-vanadium mixed oxide

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10.1021/am4016445

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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.",

keywords = "HO reduction, electrocatalyst, nanowire, oxygen reduction reaction, ruthenium-vanadium mixed oxide",

author = "Chun, {Sung Hee} and Choi, {Hyun A.} and Minkyung Kang and Moonjee Koh and Lee, {Nam Suk} and Lee, {Sang Cheol} and Minyung Lee and Youngmi Lee and Chongmok Lee and Kim, {Myung Hwa}",

year = "2013",

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doi = "10.1021/am4016445",

language = "English",

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AU - Chun, Sung Hee

AU - Choi, Hyun A.

AU - Kang, Minkyung

AU - Koh, Moonjee

AU - Lee, Nam Suk

AU - Lee, Sang Cheol

AU - Lee, Minyung

AU - Lee, Youngmi

AU - Lee, Chongmok

AU - Kim, Myung Hwa

PY - 2013/9/11

Y1 - 2013/9/11

N2 - 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.

AB - 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.

KW - HO reduction

KW - electrocatalyst

KW - nanowire

KW - oxygen reduction reaction

KW - ruthenium-vanadium mixed oxide

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JO - ACS Applied Materials and Interfaces

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ER -

Highly efficient electrochemical responses on single crystalline ruthenium-vanadium mixed metal oxide nanowires

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Keywords

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