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Citation: Shen Bao-En, Wang Gui-Liang, Tang Yin-Xuan. Spectroelectrochemical Investigation on Indi Carmine II. Heterogeneous Electron Transfer Kinetics of Indi Carmine[J]. Acta Physico-Chimica Sinica, ;1992, 8(04): 476-480. doi: 10.3866/PKU.WHXB19920410 shu

Spectroelectrochemical Investigation on Indi Carmine II. Heterogeneous Electron Transfer Kinetics of Indi Carmine

1.
Department of Chemistry, Hangzhou University, Hangzhou 310028

Received Date: 5 March 1991
Available Online: 15 August 1992

The heterogeneous electron transfer kinetic parameters of Indi Carmine at tin dioxide optically transparent electrode are reported here in this study. Both spectroelectrochemical and electrochemical techniques were used. In the former case, kinetic parameters were calculated from the normalized absorbance which was measured by absorbance versus time transient curve after serveral overpotential steps. A compu-ter data treatment method instead of the working curve method usually reported in literature was used in the calculation. In the later case, kinetic parameters were determined by measuring the difference of peak potentials ΔE_p of cathodic and anodic reference curve. The results obtained with both techniques had od coincidence. Further investigation shows that the value of kinetic parameters are dependent on Indi Carmine concentration and solution pH values. It is considered as an important information for the electrochemical reduction mechanism of Indi Carmine.
- Indi Carmine; Heterogeneous electron transfer kinetics; Spectroelectrochemistry
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