Abstract
Electrochemical behavior of NpO 2 2+ on platinum (Pt) and glassy carbon (GC) electrodes have been studied in an aqueous 3M HNO 3 solution using cyclic voltammetry and spectroelectrochemical method. The NpO 2 2+ species was found to be reduced to Np(V) quasi-reversibly with the formal redox potential of +0.907 V (Pt) and +0.909 V (GC). The reduction process of NpO 2 2+ in an aqueous 3M HNO 3 solution was also followed spectroelectrochemically by using an optical transparent thin layer electrode cell. It was found that the absorption spectra measured at the applied potentials in the range of +1.05 to +0.65 V have isosbestic points at 1051 and 1124 nm and the evaluated electron stoichiometry is 0.93. These results indicate that the reduction product of NpO 2 2+ is NpO 2 +. Further details for reaction mechanism of Np(VI) are discussed on the basis of digital simulation of the experimental cyclic voltammograms.
Original language | English |
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Pages (from-to) | 311-315 |
Number of pages | 5 |
Journal | Journal of Radioanalytical and Nuclear Chemistry |
Volume | 262 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2004 Nov 18 |
Externally published | Yes |
ASJC Scopus subject areas
- Analytical Chemistry
- Nuclear Energy and Engineering
- Radiology Nuclear Medicine and imaging
- Pollution
- Spectroscopy
- Public Health, Environmental and Occupational Health
- Health, Toxicology and Mutagenesis