Published December 1989
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Development and construction of a fast spectroelectrochemical device. Applications to the reaction kinetic study of the Eu(III/II), Ce(IV/III) and U(VI/V) redox processes
Description
The reaction kinetics of redox processes for the f transition elements is investigated. An experimental device consisting in a spectrophotometer and an electrochemical system is developed. The time needed for the optical spectra acquisition is 512 microseconds per spectrum. The experiments on europium allowed testing the electrochemical behavior of both the cell and the electrode. From the experiments performed with cerium, the equilibrium potential and the heterogeneous standard velocity constant are obtained. A reaction mechanism is proposed. The reduction of uranium in acid media is analyzed
Availability note (English)
MF available from INIS under the Report Number.Abstract (French)
Dans le but d'etudier la cinetique de reactions redox mettant en jeu les elements de transition f, un dispositif de spectroelectrochimie comprenant un spectrophotometre rapide couple a un ensemble electrochimique a ete mis au point. Les spectres optiques sont acquis a la vitesse de 512 microsecondes. Les premieres experiences, portant sur l'europium en milieu acide, ont permis de tester le comportement electrochimique de la cellule et de l'electrode. L'analyse des courbes cinetiques, realisees sur le cerium ont conduit a la determination du potentiel d'equilibre et de la constante de vitesse standard heterogene. Sur les bases de ces resultats, un mecanisme reactionnel est propose. La reduction de l'uranium en milieu acide est egalement etudieeFiles
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Additional details
Additional titles
- Original title (French)
- Mise au point d'un dispositif de spectroelectrochimie rapide. Applications a l'etude cinetique des reactions redox Eu(III/II), Ce(IV/III) et U(VI/V)
Publishing Information
- Imprint Pagination
- 151 p.
- Report number
- IPNO-T--89-14
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 22018449
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- CARBONATES; CERIUM COMPOUNDS; CHEMICAL REACTION KINETICS; ELECTROCHEMISTRY; ELECTRODES; ELECTROLYTES; EUROPIUM COMPOUNDS; REDOX PROCESS; SPECTROPHOTOMETERS; SPECTROPHOTOMETRY; TIME RESOLUTION; URANIUM COMPOUNDS
- Descriptors DEC
- ACTINIDE COMPOUNDS; CARBON COMPOUNDS; KINETICS; MEASURING INSTRUMENTS; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; REACTION KINETICS; REPROCESSING; RESOLUTION; SEPARATION PROCESSES; TIMING PROPERTIES