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Highly Branched RuO2 Nanoneedles on Electrospun TiO2 Nanofibers as an Efficient Electrocatalytic Platform
- Highly Branched RuO2 Nanoneedles on Electrospun TiO2 Nanofibers as an Efficient Electrocatalytic Platform
- Kim, Su-Jin; Cho, Yu Kyung; Seok, Jeesoo; Lee, Nam-Suk; Son, Byungrak; Lee, Jae Won; Baik, Jeong Min; Lee, Chongmok; Lee, Youngmi; Kim, Myung Hwa
- DGIST Authors
- Son, Byungrak
- Issue Date
- ACS Applied Materials and Interfaces, 7(28), 15321-15330
- Article Type
- Analytical Performance; Charge Transfer; Charge Transfer Kinetics; Crystalline Materials; Cyclic Voltammetry; Detection Performance; Diffusion-Controlled Process; Electrocatalyst; Electrocatalysts; Electrochemical Activities; Electrochemical Reactions; H2O2 Electrochemical Reaction; Low Detection Limit; Nanofiber; Nanofibers; Nanoneedle; Nanoneedles; Reduction; Ruthenium Alloys; Ruthenium Compounds; Ruthenium Oxide; Titanium; Titanium Oxide; Titanium Oxides
- 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.
- American Chemical Society
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