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Abstract:

The effect of hematite particles adhesion on the electrochemical impedance of mercury electrodes was studied at different electrode potentials. The impedance decreases as the number of attached particles increases; this impedance decrease is related to strong adhesion of particles. The impedance diagrams show, in the low frequency range, the presence of a constant phase element (CPE), with an exponent of ca. 0.5. The experimental results are analyzed in terms of an equivalent circuit including the CPE. The magnitude of this CPE is directly related to the coverage of the electrode. A qualitative interpretation for this behavior, when an AC signal is applied, is proposed in terms of a pore model for the metal/hematite particles interphase.

Registro:

Documento: Artículo
Título:Electrochemical impedance of mercury electrodes with hematite particles adhered
Autor:Andrade, E.M.; Molina, F.V.
Filiación:INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón II, C1428EHA, Buenos Aires, Argentina
Palabras clave:Electrochemical impedance; Equivalent circuit; Hematite; Particle adhesion; Pore model; Colloids; Computer simulation; Electric impedance; Electrochemical electrodes; Equivalent circuits; Mercury (metal); Particles (particulate matter); Electrodes; Hematite; Iron ores; ELectrochemical impedance; Hematite; Adhesion; AC signals; Constant phase element; Electrochemical impedance; Electrode potentials; Hematite particles; Impedance diagrams; Low frequency range; Mercury electrodes; PARTICLE ADHESION; Pore models
Año:2001
Volumen:15
Número:12
Página de inicio:1503
Página de fin:1510
DOI: http://dx.doi.org/10.1163/156856101753213330
Título revista:Journal of Adhesion Science and Technology
Título revista abreviado:J Adhes Sci Technol
ISSN:01694243
CODEN:JATEE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01694243_v15_n12_p1503_Andrade

Referencias:

  • Andrade, E.M., Molina, F.V., Encyclopedia of Surface and Colloid Science, , A. T. Hubbard (Ed). Marcel Dekker, New York (in press)
  • Andrade, E.M., Molina, F.V., Posadas, D., (1994) J. Colloid Interface Sci., 165, pp. 450-458
  • Andrade, E.M., Molina, F.V., Gordillo, G.J., Posadas, D., (1994) J. Colloid Interface Sci., 165, pp. 459-466
  • Andrade, E.M., Molina, F.V., Gordillo, G.J., Posadas, D., (1995) J. Colloid Interface Sci., 173, pp. 231-235
  • Andrade, E.M., Molina, F.V., Posadas, D., (1995) J. Colloid Interface Sci., 176, pp. 495-497
  • Bowling, R.A., (1988) Particles on Surfaces 1: Detection, Adhesion and Removal, pp. 129-142. , K. L. Mittal (Ed.), Plenum Press, New York
  • Deflorian, F., Fedrizzi, L., (1999) J. Adhesion Sci. Technol., 13, pp. 629-645
  • Gonzalez, J.E.G., Mirza Rosca, J.C., (1999) J. Adhesion Sci. Technol., 13, pp. 379-391
  • Deslouis, C., Gabrielli, C., Keddam, M., Khalil, A., Rosset, R., Tribollet, B., Zidoune, M., (1997) Electrochim. Acta, 42, pp. 1219-1233

Citas:

---------- APA ----------
Andrade, E.M. & Molina, F.V. (2001) . Electrochemical impedance of mercury electrodes with hematite particles adhered. Journal of Adhesion Science and Technology, 15(12), 1503-1510.
http://dx.doi.org/10.1163/156856101753213330
---------- CHICAGO ----------
Andrade, E.M., Molina, F.V. "Electrochemical impedance of mercury electrodes with hematite particles adhered" . Journal of Adhesion Science and Technology 15, no. 12 (2001) : 1503-1510.
http://dx.doi.org/10.1163/156856101753213330
---------- MLA ----------
Andrade, E.M., Molina, F.V. "Electrochemical impedance of mercury electrodes with hematite particles adhered" . Journal of Adhesion Science and Technology, vol. 15, no. 12, 2001, pp. 1503-1510.
http://dx.doi.org/10.1163/156856101753213330
---------- VANCOUVER ----------
Andrade, E.M., Molina, F.V. Electrochemical impedance of mercury electrodes with hematite particles adhered. J Adhes Sci Technol. 2001;15(12):1503-1510.
http://dx.doi.org/10.1163/156856101753213330