OXOMETALATE-CLAY-MODIFIED ELECTRODES - SYNTHESIS AND PROPERTIES OF ANIONIC CLAYS PILLARED BY METATUNGSTATE

Citation
B. Keita et al., OXOMETALATE-CLAY-MODIFIED ELECTRODES - SYNTHESIS AND PROPERTIES OF ANIONIC CLAYS PILLARED BY METATUNGSTATE, Journal of electroanalytical chemistry [1992], 355(1-2), 1993, pp. 235-251
Citations number
57
Categorie Soggetti
Electrochemistry,"Chemistry Analytical
Journal title
Journal of electroanalytical chemistry [1992]
ISSN journal
15726657 → ACNP
Volume
355
Issue
1-2
Year of publication
1993
Pages
235 - 251
Database
ISI
SICI code
Abstract
Three anion-pillared hydrotalcite clays or layered double hydroxides, have been prepared corresponding to the general formula Zn2Al(X).mH2O, where X=Cl-, NO3-, or terephthalate dianion (TA). To the best of our knowledge, Zn2Al(TA).mH2O has been prepared for the first time. These clays are used to modify electrode surfaces and the exchanges of the d ifferent anions under mildly acidic conditions with metatungstate anio ns have been monitored by cyclic voltammetry and compared. They procee d smoothly to give the isopolymetalate-pillared hydrotalcite, the best results being obtained with Zn2Al(TA). The best conditions for prepar ation of these electrodes and the stability of the final assembly in v arious conditions have been studied.