Investigation of electron transfer reaction between ferri/ferrocyanide and TCNQ on polarized water/1, 2-dichloroethane interface by scanning electrochemical microscopy
Huang, F., Zhang, Z-X, Feng, G-D, Yu, A-M and Zhang, Z-Q (2007) Investigation of electron transfer reaction between ferri/ferrocyanide and TCNQ on polarized water/1, 2-dichloroethane interface by scanning electrochemical microscopy. Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities, 28 (10). pp. 1952-1956.
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A liquid/liquid interface supported on a metallic electrode was used to study the electron transfer (ET) reactions by scanning electrochemical microscopy (SECM). The system is composed of an aqueous droplet adhered on a platinum disc electrode and immersed into an organic electrolyte solution containing 7, 7, 8, 8-tetracyanoquinodimenthane (TCNQ). The droplet with a redox couple of K3Fe(CN)6 and K4Fe(CN)6 was employed, both were used as a reference electrode on the platinum disc, and as an electron donor/acceptor at the polarized liquid/liquid interface. With the present experimental approach, the liquid/liquid interface can be polarized externally. The apparent heterogeneous rate constants for the ET reactions were extracted by fitting the experimental approach curves obtained from SECM experiments to the theoretical values. These rate constants obey the Butler-Volume formula in some ranges, and they are found to be potential dependent. This method enables a fast and convenient method to measure ET and ion transfer (IT) reactions kinetic parameter.
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|Publisher:||Gaodeng Jiaoyu Chubanshu|
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