ELECTROREDUCTION OF HEXAVALENT CHROMIUM COMPOUNDS ON THE GOLD ELECTRODE

Citation
Fi. Danilov et Vs. Protsenko, ELECTROREDUCTION OF HEXAVALENT CHROMIUM COMPOUNDS ON THE GOLD ELECTRODE, Russian journal of electrochemistry, 34(3), 1998, pp. 276-281
Citations number
25
Categorie Soggetti
Electrochemistry
ISSN journal
10231935
Volume
34
Issue
3
Year of publication
1998
Pages
276 - 281
Database
ISI
SICI code
1023-1935(1998)34:3<276:EOHCCO>2.0.ZU;2-V
Abstract
Kinetic regularities pertaining to electroreduction of compounds of he xavalent chromium (1 M CrO3) to the trivalent state are investigated o n the gold electrode. It is shown that this reaction proceeds by the C E mechanism. The chemical step, preceding the discharge, involves some compounds (H2SO4, HCOOH, HF HCl, etc.) that accelerate reduction of C r(VI). They are incorporated into electroactive surface compounds (sub stituted polychromates) and carry out electron transfer by the bridge mechanism.