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Nickel‐Based Thick Film Ethanol Sensor
Author(s) -
Lee Yuan Gee,
Chou TseChuan
Publication year - 2003
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200302717
Subject(s) - nickel , ethanol , cyclic voltammetry , detection limit , electrode , redox , materials science , electrochemistry , adsorption , analytical chemistry (journal) , solid state , inorganic chemistry , chemistry , metallurgy , organic chemistry , chromatography
Thick films ethanol sensors were prepared. The composition of the electrode was measured qualitatively to consist of Ni, O, Al, Mg and Pb. Among these composing elements, it was found that only the nickel could sense the ethanol. Both the infrared (IR) spectrum and cyclic voltammetry (CV) tests were employed to investigate its derivatives in the sensing reaction. It was found that the derivatives presented as adsorbed enol group and β‐ketoaldehyde as enols. Besides, both the redox between Ni(II) and Ni(III), and solid‐state electrochemical reactions in the electrode were found to occur in this system simultaneously. A linear dependence of response current vs. ethanol concentration with a detection limit of 37 ppm was obtained and the response time was estimated to be 140 seconds in this sensing system.