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Highly Branched RuO2 Nanoneedles on Electrospun TiO2 Nanofibers as an Efficient Electrocatalytic Platform

Title
Highly Branched RuO2 Nanoneedles on Electrospun TiO2 Nanofibers as an Efficient Electrocatalytic Platform
Authors
Kim, SJ[Kim, Su-Jin]Cho, YK[Cho, Yu Kyung]Seok, J[Seok, Jeesoo]Lee, NS[Lee, Nam-Suk]Son, B[Son, Byungrak]Lee, JW[Lee, Jae Won]Baik, JM[Baik, Jeong Min]Lee, C[Lee, Chongmok]Lee, Y[Lee, Youngmi]Kim, MH[Kim, Myung Hwa]
DGIST Authors
Son, B[Son, Byungrak]
Issue Date
2015-07-22
Citation
ACS Applied Materials and Interfaces, 7(28), 15321-15330
Type
Article
Article Type
Article
Keywords
Analytical PerformanceCharge TransferCharge Transfer KineticsCrystalline MaterialsCyclic VoltammetryDetection PerformanceDiffusion-Controlled ProcessElectrocatalystElectrocatalystsElectrochemical ActivitiesElectrochemical ReactionsH2O2 Electrochemical ReactionLow Detection LimitNanofiberNanofibersNanoneedleNanoneedlesReductionRuthenium AlloysRuthenium CompoundsRuthenium OxideTitaniumTitanium OxideTitanium Oxides
ISSN
1944-8244
Abstract
Highly single-crystalline ruthenium dioxide (RuO2) nanoneedles were successfully grown on polycrystalline electrospun titanium dioxide (TiO2) nanofibers for the first time by a combination of thermal annealing and electrospinning from RuO2 and TiO2 precursors. Single-crystalline RuO2 nanoneedles with relatively small dimensions and a high density on electrospun TiO2 nanofibers are the key feature. The general electrochemical activities of RuO2 nanoneedles-TiO2 nanofibers and Ru(OH)3-TiO2 nanofibers toward the reduction of [Fe(CN)6]3- were carefully examined by cyclic voltammetry carried out at various scan rates; the results indicated favorable charge-transfer kinetics of [Fe(CN)6]3- reduction via a diffusion-controlled process. Additionally, a test of the analytical performance of the RuO2 nanoneedles-TiO2 nanofibers for the detection of a biologically important molecule, hydrogen peroxide (H2O2), indicated a high sensitivity (390.1 ± 14.9 μA mM-1 cm-2 for H2O2 oxidation and 53.8 ± 1.07 μA mM-1 cm-2 for the reduction), a low detection limit (1 μM), and a wide linear range (1-1000 μM), indicating H2O2 detection performance better than or comparable to that of other sensing systems. © 2015 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/2876
DOI
10.1021/acsami.5b03178
Publisher
American Chemical Society
Files:
There are no files associated with this item.
Collection:
Convergence Research Center for Wellness1. Journal Articles


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