Multilayer Assembly of Mn-substituted Keggin-type [ZnW11O39 Mn(H2O)]8- on Chemically Modified Glassy Carbon Electrode and Its Electrocatalytic Properties

Abstract

Abstract: Through layer by layer assembly, undecatungstozincates monosubstituted by transition metals Mn, ZnW₁₁ Mn(H₂O)O₃₉^8- was successfully immobilized on a glassy carbon electrode surface grafted covalently by 4 aminobenzoic acid. The electrochemical behavior of these polyoxometalates was investigated. Cyclic voltammetry proves the uniform growth of the film. They exhibit some special electrochemical properties in the films, different from those in homogeneous aqueous solution. The effect of pHon the redox behavior of ZnW₁₁ Mn(H₂O)O₈^- 39 in the film was discussed in detail. The multilayer film electrodes have an excellent electrocatalytic response to the reduction of H₂O₂ and BrO₃^-, and to the oxidation of ascorbic acid.

Key words: Transition metal substituted polyoxometalates ZnW₁₁ Mn(H₂O)O₃₉^8-, Multilayer assembly, Electrocatalysis

CLC Number:

O657

TrendMD:

LIU Jian-Yun, CHENG Long, DONG Shao-Jun . Multilayer Assembly of Mn-substituted Keggin-type [ZnW₁₁O₃₉ Mn(H₂O)]^8- on Chemically Modified Glassy Carbon Electrode and Its Electrocatalytic Properties[J]. Chem. J. Chinese Universities, 2001, 22(10): 1641.

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Multilayer Assembly of Mn-substituted Keggin-type [ZnW₁₁O₃₉ Mn(H₂O)]^8- on Chemically Modified Glassy Carbon Electrode and Its Electrocatalytic Properties

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