COMPOSITION AND PHOTOACTIVITY OF LEAD-OXIDE FILM PREPARED ON A PB ELECTRODE IN THE PB PBO POTENTIAL REGION IN 0.1M NAOH+0.1M NA2SO4 AT 80-DEGREES-C/

Authors
VELUCHAMY P SHARON M
Citation
P. Veluchamy et M. Sharon, COMPOSITION AND PHOTOACTIVITY OF LEAD-OXIDE FILM PREPARED ON A PB ELECTRODE IN THE PB PBO POTENTIAL REGION IN 0.1M NAOH+0.1M NA2SO4 AT 80-DEGREES-C/, Journal of electroanalytical chemistry [1992], 365(1-2), 1994, pp. 179-183
Citations number
27
Categorie Soggetti
Electrochemistry,"Chemistry Analytical
Journal title
Journal of electroanalytical chemistry [1992]
ISSN journal
15726657 → ACNP
Volume
365
Issue
1-2
Year of publication
1994
Pages
179 - 183
Database
ISI
SICI code
Abstract
The mechanism of lead oxide formation during the potentiodynamic anodi zation of lead (Pb) electrodes in the region -0.95 to -0.35 V/SCE (Pb/ PbO region) in 0.1 M NaOH + 0.1 M Na2SO4 at 80-degrees-C is discussed. X-ray diffraction and UV-visible reflectance studies suggest that bet a-PbO initially forms on the Pb surface and gradually changes to alpha -PbO with increasing anodization time. In addition, the colour of the electrode changes from whitish yellow to reddish. The photoresponse fo r the lead oxide electrodes in 0.1 M Fe(CN)63-/4- decreases with incre asing anodization time.