期刊
MICROCHIMICA ACTA
卷 175, 期 1-2, 页码 137-143出版社
SPRINGER WIEN
DOI: 10.1007/s00604-011-0664-6
关键词
TiC/C nanofiber arrays; Hydrazine; Amperometric sensor; Eletroanalysis
资金
- National Natural Science Foundation of China [50902104]
- City University of Hong Kong [7008009]
- National High Technology Research and Development Program of China [2009AA02Z416]
- Hubei Province Natural Science Foundation [2010CDB03402]
Arrays made from quasi-aligned nanofibers consisting of a TiC/C composite were produced directly on a titanium alloy substrate by a thermochemical process. Their morphology, structure and composition were characterized by electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The arrays were directly utilized as an electrode without further treatment and display high catalytic activity in terms of hydrazine oxidation. The low overpotential decreases gradually when increasing pH values from 5 to 10. The detection range is linear from 0.1 to 1,635 mu M concentrations, and the detection limit is as low as 0.026 mu M (S/N = 3). The selectivity of the electrode and its general performance and stability are very good. The improved electrochemical properties of the new electrode are attributed to the synergic effect of the highly conducting TiC nanowire core and an abundant amount of edge-plane-like defects on the carbon shells.
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