Electrochemical behavior of (Zn, Mn)-Al nitrated hydrotalcites
Por:
Sampieri A., Vázquez-Arenas J., González I., Fetter G., Pfeiffer H., Villafuerte, ME, Bosch P.
Publicada:
1 oct 2012
Resumen:
The electrochemical behavior of synthetic binary, Zn-Al and Mn-Al, and ternary (Zn-Mn)-Al hydrotalcites (HT) was studied by cyclic voltammetry in alkaline conditions (pH=12). The Zn-Al HT characterization revealed two irreversible and continuous oxidation processes: i) Zn 0|Zn 2+ and ii) Zn 0|ZnO. On the other hand, the binary HT containing Mn presented a reversible behavior for the oxidation-reduction process Mn 4+|Mn 3+. The same oxidation-reduction processes were observed in the ternary HT. However, variations in the reduction-oxidation process were detected by XRD for the ternary HT as a result of spinel formation. These results could also be influenced due to a higher accessibility of manganese in HT since the morphology of hydrotalcite (lamellar structure) provides a regular distribution of Mn atoms interacting with Zn atoms through hydroxyl bridges. © J. New Mat. Electrochem. Systems.
Filiaciones:
Sampieri A.:
Benemérita Universidad Autónoma de Puebla, Facultad de Ingeniería Química, Ciudad Universitaria, 72570, Puebla, PUE, Mexico
Vázquez-Arenas J.:
Chemical Engineering Department, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
González I.:
Universidad Autónoma Metropolitana-Iztapalapa, Departamento de Química, A. P. 55-534, 09340 Mexico D.F., Mexico
Fetter G.:
Benemérita Universidad Autónoma de Puebla, Facultad de Ciencias Químicas, Ciudad Universitaria, 72570, Puebla, PUE, Mexico
Pfeiffer H.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Villafuerte, ME:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Bosch P.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
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