Affiliation:
1. CNR-ISOF u.o.s. Ferrara c/o Dipartimento di Scienze Chimiche e Farmaceutiche, Ferrara, Italy
2. Ukrainian State University of Chemical Technology, Dnipropetrovsk, Ukraine
Abstract
The properties of electrodeposited PbO2 are sensibly influenced by deposition
current and temperature. In particular, tritium radiotracer measurements have
demonstrated that protons are incorporated in the bulk of the oxide film and
on its surface. The degree of hydration increases with increasing current and
decreases with temperature, and is related to the morphological
characteristics of the oxide such as roughness measured by changes of the
double layer capacity. Conversely, the amount of hydrogen has negligible
effects on the number of free carriers evaluated from Mott-Schottky plots.
The hydration degree of the surface seems to be an important factor
influencing electrocatalytic processes at high potentials such as O2
evolution and O3 formation. On less hydrated, more crystalline PbO2 surfaces
the first process is inhibited, and accordingly, the second is favored.
Publisher
National Library of Serbia
Cited by
4 articles.
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