Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10275826 | Journal of Electroanalytical Chemistry | 2005 | 5 Pages |
Abstract
Polypyrrole films modified with Ni Particles were eletrodeposited using a constant potential on a Pt/quartz crystal electrode with the aim to investigate the changes in the voltammetric and mass profiles compared with pure polypyrrole. The electrochemical behavior of the polypyrrole with Ni showed a new cathodic peak at â0.73Â V associated to Ni2+ reduction. Besides, it was characterized that there is a redox-pair of the polymer and Ni and a model was proposed to explain the phenomenon considering the eletroneutrality principle. The transport of the ClO4- ion into (or outside) the polymer is opposite to the expected direction. This occurs due to the redox-pair between the PPy chain and Ni species which can be explained by a loss of anions during Ni oxidation and the gain of anions during the Ni reduction.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
F.O.F. Bergamaski, M.C. Santos, P.A.P. Nascente, L.O.S. Bulhões, E.C. Pereira,