Original scientific paper

A Comparative Study of Lead Oxide Modified Graphite Paste Electrodes and Solid Graphite Electrodes with Mechanically Immobilized Lead Oxides

Nina Zakharchuk ; Institut für Chemie und Biochemie, Ernst-Moritz-Arndt-Universität Greifsivald, Soldmannstraße 23, D-17487 Greifsivald, Germany
Stefan Meyer ; Institut für Chemie und Biochemie, Ernst-Moritz-Arndt-Universität Greifsivald, Soldmannstraße 23, D-17487 Greifsivald, Germany
Britta Lange ; Institut für Chemie und Biochemie, Ernst-Moritz-Arndt-Universität Greifsivald, Soldmannstraße 23, D-17487 Greifsivald, Germany
Fritz Scholz ; Institut für Chemie und Biochemie, Ernst-Moritz-Arndt-Universität Greifsivald, Soldmannstraße 23, D-17487 Greifsivald, Germany

Abstract

The cyclic voltammetry of red PbO, α-PbO₂, β-PbO₂ and BaPbO₃ was studied with two different types of electrodes in acidic and alkaline media. In one case, microcrystalline particles of lead oxides were mechanically immobilized on the surface of paraffin-impregnated graphite rod electrodes (PIGE), while in the other case, lead oxides were added to a paste of graphite and silicone oil. The overall behaviour of lead oxides in both electrodes is very similar to the well-known behaviour of electrodes made of lead oxide powders.
The results show that the binder does not effect the overall electro-chemistry of lead oxides. Moreover, the electrochemical reactions are more reversible for the paste electrode than in the case of the PIGE.

Keywords

mechanical immobilization; modified graphite paste electrode; cyclic voltammetry; lead oxides

Hrčak ID:

132009

URI

https://hrcak.srce.hr/132009

Publication date:

4.9.2000.

Visits: 1.410 *