✦ LIBER ✦

The effect of pH on the electrocatalytic properties of adsorbed metal ions

✍ Scribed by Perminder Bindra; David Light; Jaynal Molla

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 772 KB
Volume: 36
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(91)85137-v

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✦ Synopsis

The electrocatalytic behavior of adsorbed lead atoms on mercury towards 0, reduction in neutral electrolyte at ambient temperature is examined. The results show that 0, reduction on these modified surfaces proceeds through the series mechanism and that the enhancement is mainly due to hydrogen peroxide elimination through reduction and/or heterogeneous chemical decomposition. Measurements performed as a function of pH in the range pH = 4 to pH = 10 indicate that the hydrogen peroxide decomposition reaction slows down as the pH increases.

Using cyclic voltammetry and rotating ring-disk techniques, it is demonstrated that for the Pb-Hg system the catalytic species is lead oxide or lead hydroxide.

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