Potentiometric parameters of a PVC-NaV6O15-graphite electrode

Authors
Smirnova, OA Mikhailova, AM
Citation
Oa. Smirnova et Am. Mikhailova, Potentiometric parameters of a PVC-NaV6O15-graphite electrode, RUSS J ELEC, 36(8), 2000, pp. 833-838
Citations number
18
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
ISSN journal
10231935 → ACNP
Volume
36
Issue
8
Year of publication
2000
Pages
833 - 838
Database
ISI
SICI code
1023-1935(200008)36:8<833:PPOAPE>2.0.ZU;2-X
Abstract
Film electrodes, modified with the NaV6O15 (Na0.33V2O5) bronze and selectiv e to V(5+) ions in acidic and neutral media, are studied. The active concen tration range is shown to be 10(-2) to 10(-5) M. The concentration dependen ce of the potential obeys the Nernst equation with a slope of 59.4 +/- 0.8 mV/pc corresponding to a one-electron transition VO2- --> VO2+ at pH 1.5-2. 0 (cation function). At pH 5.0-6.0, the dependence corresponds to the trans ition VO3- --> VO2+ (anion function) with a slope of -58.0 +/- 0.7 mV/pc.