Synthesis of Tetra-iron Substituted Sandwich-type Pentadecatungstodiarsenate and Its Multilayers on Glassy Carbon Electrode by Self-assembly with Electrocatalytic Properties

Abstract

Abstract: A novel sandwichtype compound, Na₁₂[Fe₄(H₂O)₂(As₂W₁₅O₅₆)₂]·38H₂O(denoted as Fe₄As₄W₃₀) was synthesized. The compound was well characterized by means of IR, UV-Vis, ¹⁸³W NMR and elemental analyses. Redox electrochemistry of the compound has been studied in acid buffer solutions using cyclic voltammetry(CV). The compound containing multilayer films has been fabricated on the 4-aminobenzoic acid(4-ABA) modified glassy carbon electrode(GCE) surface by alternate deposition with a quaternized poly(4-vinylpyridine) partially completed with [Os(bpy)₂Cl]^2+/-(denoted as QPVPOs). CV, X-ray photoelectron spectroscopy(XPS) and UV-Vis spectroscopy were used to characterize the asprepared multilayer films. It is proved that the multilayer films are uniform and stable. The electrocatalytic activities of the multilayer films were investigated on the reduction of two substrates of important analytical interest, NO₂^- and H₂O₂.

Key words: Sandwich-type tungstodiarsenate, Modified electrode, Electrocatalytic properties

CLC Number:

O614

TrendMD:

BI Li-Hua, LIU Jian-Yun, SHEN Yan, JIANG Jun-Guang, WANG Er-Kang, DONG Shao-Jun . Synthesis of Tetra-iron Substituted Sandwich-type Pentadecatungstodiarsenate and Its Multilayers on Glassy Carbon Electrode by Self-assembly with Electrocatalytic Properties[J]. Chem. J. Chinese Universities, 2002, 23(3): 472.

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Synthesis of Tetra-iron Substituted Sandwich-type Pentadecatungstodiarsenate and Its Multilayers on Glassy Carbon Electrode by Self-assembly with Electrocatalytic Properties

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