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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-JinCho, Yu KyungSeok, JeesooLee, Nam-SukSon, ByungrakLee, Jae WonBaik, Jeong MinLee, ChongmokLee, YoungmiKim, Myung Hwa
DGIST Authors
Son, Byungrak
Issued Date
Article Type
Analytical PerformanceCharge TransferCharge Transfer KineticsCrystalline MaterialsCyclic VoltammetryDetection PerformanceDiffusion-Controlled ProcessElectrocatalystElectrocatalystsElectrochemical ActivitiesElectrochemical ReactionsH2O2 Electrochemical ReactionLow Detection LimitNanofiberNanofibersNanoneedleNanoneedlesReductionRuthenium AlloysRuthenium CompoundsRuthenium OxideTitaniumTitanium OxideTitanium 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
Related Researcher
  • 손병락 Son, Byungrak 에너지융합연구부
  • Research Interests 연료전지; Fuel Cell; 하이브리드 전원; Hybrid Power; 스택; Stack; 촉매; Catalyst; 연료전지시스템; Fuel Cell System;센서네트워크;Sensor Network
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Convergence Research Center for Wellness 1. Journal Articles


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