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An ac impedance study of the electrochemical behaviour of iron in acidic acetonitrile—water solutions

✍ Scribed by Elisabet Ahlberg; Mick Friel

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
547 KB
Volume
34
Category
Article
ISSN
0013-4686

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✦ Synopsis

Impedance spectroscopy is used in conjunction with polarization measurements in order to interpret the mechanism of acctonitrile adsorption on iron electrodes in the pH=2.5-1.0 interval. The results suggest that at least two adsorbed intermediates participate in the reaction sequence. Since the time constant for the relaxation process for one of the intermediates is independent of potential, this might suggest a direct adsorption of acetonitrile on iron. However, the time constant for the other intermediate is dependent on the potential in the same manner as for the electron transfer reaction. This might suggest that an adsorbed iron complex is formed.

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