1 research outputs found
Highly Branched RuO<sub>2</sub> Nanoneedles on Electrospun TiO<sub>2</sub> Nanofibers as an Efficient Electrocatalytic Platform
No full textHighly
single-crystalline ruthenium dioxide (RuO<sub>2</sub>) nanoneedles
were successfully grown on polycrystalline electrospun titanium dioxide
(TiO<sub>2</sub>) nanofibers for the first time by a combination of
thermal annealing and electrospinning from RuO<sub>2</sub> and TiO<sub>2</sub> precursors. Single-crystalline RuO<sub>2</sub> nanoneedles
with relatively small dimensions and a high density on electrospun
TiO<sub>2</sub> nanofibers are the key feature. The general electrochemical
activities of RuO<sub>2</sub> nanoneedles–TiO<sub>2</sub> nanofibers
and RuÂ(OH)<sub>3</sub>-TiO<sub>2</sub> nanofibers toward the reduction
of [FeÂ(CN)<sub>6</sub>]<sup>3–</sup> were carefully examined
by cyclic voltammetry carried out at various scan rates; the results
indicated favorable charge-transfer kinetics of [FeÂ(CN)<sub>6</sub>]<sup>3–</sup> reduction via a diffusion-controlled process.
Additionally, a test of the analytical performance of the RuO<sub>2</sub> nanoneedles–TiO<sub>2</sub> nanofibers for the detection
of a biologically important molecule, hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), indicated a high sensitivity (390.1 ± 14.9 μA
mM<sup>–1</sup> cm<sup>–2</sup> for H<sub>2</sub>O<sub>2</sub> oxidation and 53.8 ± 1.07 μA mM<sup>–1</sup> cm<sup>–2</sup> for the reduction), a low detection limit
(1 μM), and a wide linear range (1–1000 μM), indicating
H<sub>2</sub>O<sub>2</sub> detection performance better than or comparable
to that of other sensing systems
