Tytuł artykułu
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Abstrakty
The streaming mercury electrode was recently found by us a very powerful electrode type for the observation of sustained oscillations and multistability accompanying the electrode processes with the region of the negative differential resistance (NDR) in their I-E characteristics. Following our earlier experimental and theoretical studies of the electroreduction of the pseudohalogenide complexes of nickel(II) at the streaming mercury electrode, we discuss the conditions for the onset of oscillations and multistability in these processes, taking into account the dependence of the double layer capacitance on the electrode potential. The improved stability criteria, involving both the differentialCd and integral K capacitances are derived and compared with our earlier simplified theory. Based on the experimental characteristics of the Ni(II)-SCN- electroreduction it is quantitatively shown, how the two factors specific to the streaming electrodes: the permanent flow of the capacitive current and - in particular - the relatively small thickness of the diffusion layer determine the characteristics of the bistable and oscillatory behaviour.
Wydawca
Czasopismo
Rocznik
Tom
Strony
1221--1234
Opis fizyczny
Bibliogr. 13 poz., rys.
Twórcy
autor
- Laboratory of Electroanalytical Chemistry, Department of Chemistry, University of Warsaw, ul. Pasteura 1, PL-02-093 Warsaw, Poland
autor
- Laboratory of Electroanalytical Chemistry, Department of Chemistry, University of Warsaw, ul. Pasteura 1, PL-02-093 Warsaw, Poland
Bibliografia
- 1. Jurczakowski R. and Orlik M., J. Phys. Chem. B, 106, 1058 (2002).
- 2. Orlik M. and Jurczakowski R., J. Phys. Chem. B, 106, 7527 (2002).
- 3. Jurczakowski R. and Orlik M., J. Phys. Chem. B, 107, 10148 (2003).
- 4. Heyrovsky J. and Forejt J., Z. Physik Chem., 193, 77 (1947).
- 5. Jurczakowski R. and Orlik M., J. Electroanal. Chem., 486, 65 (2000).
- 6. Jurczakowski R. and Orlik M., J. Electroanal. Chem., 562, 205 (2004).
- 7. Electroanalytical Methods of Determination of Physicochemical Constants, Ed. Z Galus, PWN Warsaw, 1979 (in Polish).
- 8. Bard A.J. and Faulkner L.R., Electrochemical Methods. Fundamentals and Applications, second ed. Wiley, New York, 2001, p. 541.
- 9. Delahay P., J Electroanal. Chem., 10, 1 (1965).
- 10. Strogatz S.H., Nonlinear Dynamics and Chaos, Addison-Wesley: Reading, MA, 1994.
- 11. Koper Electrochim. Acta, 37, 1771 (1992).
- 12. Jurczakowski R. and Orlik M., in preparation.
- 13. Marciniak A., Gregulec D. and Kaczmarek J., Numerical Procedures in Turbo Pascal for Your PC Nakom, Poznań, 1991.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ1-0024-0067