Izlaganje sa skupa

The Deposition of Metallic Phases on Polymers with Different Electronic Conductivity and Catalytic Activity

K. Saurbier ; Institut fur Physikalische Chemie und Elektrochemie Heinrich-Heine-Universitdt, UniversUdtsstr. 1, 4000 Diisseldorf, FRG
J. W. Schultze ; Institut fur Physikalische Chemie und Elektrochemie Heinrich-Heine-Universitdt, UniversUdtsstr. 1, 4000 Diisseldorf, FRG
A. Thyssen ; Institut fur Physikalische Chemie und Elektrochemie Heinrich-Heine-Universitdt, UniversUdtsstr. 1, 4000 Diisseldorf, FRG

Sažetak

The growth of metallic phases and the kinetics of this process are mainly dependent on the electronic conductivity and catalytic activity of the substrate. In this work we used electrodes covered with different polymer films. The conductivity and the number of growth sites of these modified electrodes was changed by the monomer (in the polymer chain or by the polarization. We used the metallic conducting polyaniline as deposited material.
From the experimental data current density i and change of mass m as function of time, we got informations about the different steps of electropolymerization as nucleation and growth of a homogeneous film. This investigation shows that the number of growing centers plays an important role and can be varied with the substrate. A modification with semiconducting or insulating polymers, of course, is not useful to accelerate the growth. Further characteristic quantities like the rate of the growth can be calculated and their in-situ-transients are depicted. Additionally the electronic behaviour of the used substrate can be characterized.

Ključne riječi

Hrčak ID:

137382

URI

https://hrcak.srce.hr/137382

Datum izdavanja:

28.12.1990.

Posjeta: 578 *