Highly Branched RuO<inf>2</inf> Nanoneedles on Electrospun TiO<inf>2</inf> Nanofibers as an Efficient Electrocatalytic Platform
- 주제(키워드) electrocatalyst , H<inf>2</inf>O<inf>2</inf> electrochemical reaction , nanofiber , nanoneedle , ruthenium oxide , titanium oxide
- 등재 SCIE, SCOPUS
- 발행기관 American Chemical Society
- 발행년도 2015
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000118646
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/acsami.5b03178
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Highly single-crystalline ruthenium dioxide (RuO<inf>2</inf>) nanoneedles were successfully grown on polycrystalline electrospun titanium dioxide (TiO<inf>2</inf>) nanofibers for the first time by a combination of thermal annealing and electrospinning from RuO<inf>2</inf> and TiO<inf>2</inf> precursors. Single-crystalline RuO<inf>2</inf> nanoneedles with relatively small dimensions and a high density on electrospun TiO<inf>2</inf> nanofibers are the key feature. The general electrochemical activities of RuO<inf>2</inf> nanoneedles-TiO<inf>2</inf> nanofibers and Ru(OH)<inf>3</inf>-TiO<inf>2</inf> nanofibers toward the reduction of [Fe(CN)<inf>6</inf>]3- were carefully examined by cyclic voltammetry carried out at various scan rates; the results indicated favorable charge-transfer kinetics of [Fe(CN)<inf>6</inf>]3- reduction via a diffusion-controlled process. Additionally, a test of the analytical performance of the RuO<inf>2</inf> nanoneedles-TiO<inf>2</inf> nanofibers for the detection of a biologically important molecule, hydrogen peroxide (H<inf>2</inf>O<inf>2</inf>), indicated a high sensitivity (390.1 ± 14.9 μA mM-1 cm-2 for H<inf>2</inf>O<inf>2</inf> 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 H<inf>2</inf>O<inf>2</inf> detection performance better than or comparable to that of other sensing systems. © 2015 American Chemical Society.
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