PHYS 398 |
| Ionic liquid (IL) 1-ethyl-3-methylimidazolium bromine was synthesized by the quaternization of 1-methylimidazole with 1-bromoethane. The structure of the IL was confirmed by IR, 1HNMR and MS. The electrochemical window is 2.2 V. The effects of voltage scanning rate, temperature and reactant concentration on the electrochemical reduction behavior of Ferric Chloride(FeCl3) in the IL were studied with GC working electrode, Al/Al3+ reference electrode and Pt counter electrode. The results showed that the electron exchange of the reduction of Fe3+ was made out to be one. The electrochemical reduction of Fe3+ was irreversible, and the temperature coefficient of the peak current was less than 2%, which proved that the reactions were not controlled by the electrochemical step. The peak current increased and the peak voltage shifted to negative as FeCl3 concentration increased. The diffusion coefficient of Fe3+ in the IL is about 9.543×10-8 cm2•s-1 and the apparent transfer coefficient(α) is 0.34. |
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PHYS Poster Session - General Experiment
7:30 PM-10:00 PM, Wednesday, April 9, 2008 Morial Convention Center -- Hall A, Poster
Division of Physical Chemistry |