Electron transfer and homogeneous redox catalysis on glassy carbon electrode—I. Linear sweep and cyclic voltammetric studies on Ti(IV) oxalate-NH2 OH system in oxalic acid media
✍ Scribed by M. Noel; P.N. Anantharaman
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 557 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
The electron transfer rate of titanic oxalate on glassy carbon is found to be slower when compared to the same on Hg electrode. The estimated rate constant using Nicholson's method was found to be 1.2 kO.1 x IO-'ems-' The etkt of pH shows similarity with the reports on Hg electrode. Fractional reaction orders were obtained in the Tafel region. These observations may be due to the fact that the electrode surface under experimental conditions is partially covered. The estimated reduction rate of NH,OH by the electrogenerated titanous oxalate agrees very well with the literature values at lower NH,OH concentrations. However, devlatlons are notuxd when higher concentrations of Ti (IV) oxalate as well as NH,OH are employed. The possibility of existence of more complicated redox-catalytic mechanism is indicated.