Phosphomolybdate-modified multi-walled carbon nanotubes as effective mediating systems for electrocatalytic reduction of bromate

Electrocatalytic properties (towards reduction of bromate in 0.5 mol dm −3 H 2SO 4) of multi-walled carbon nanotubes (CNTs) modified with phosphododecamolybdate (PMo 12) monolayers have been diagnosed using cyclic voltammetry and amperometry. The ability of negatively charged PMo 12-modified CNTs to...

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Bibliographic Details
Published in:Analytica chimica acta 2009-01, Vol.631 (2), p.153-160
Main Authors: Skunik, Magdalena, Kulesza, Pawel J.
Format: Article
Language:English
Subjects:
Analytical chemistry
Bromate reduction
Bromates - chemistry
Carbon nanotubes
Catalysis
Chemistry
Conducting polymers
Electrochemical methods
Electrochemistry
Electrodes
Exact sciences and technology
Fluorocarbon Polymers - chemistry
Linear Models
Molybdenum - chemistry
Nanotubes, Carbon - chemistry
Organic Chemicals - chemistry
Oxidation-Reduction
Phosphoric Acids - chemistry
Polyoxometallate
Sensitivity and Specificity
Time Factors
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Summary:Electrocatalytic properties (towards reduction of bromate in 0.5 mol dm −3 H 2SO 4) of multi-walled carbon nanotubes (CNTs) modified with phosphododecamolybdate (PMo 12) monolayers have been diagnosed using cyclic voltammetry and amperometry. The ability of negatively charged PMo 12-modified CNTs to attract electrostatically ultra-thin, positively charged conducting polymer (PEDOT or polypyrrole) structures is explored to grow in controlled manner hybrid organic–inorganic network electrocatalytic films. Due to the presence of three-dimensionally distributed CNTs, the films’ conductivity and porosity are improved. The hybrid systems utilizing polypyrrole, rather than PEDOT, have produced fairly higher bromate electroreduction catalytic currents. Comparison is also made to Nafion-stabilized dispersion of PMo 12-modified CNTs inks. The latter system is characterized by good stability and relatively the highest sensitivities with respect to bromate concentration.
ISSN:0003-2670
1873-4324
DOI:10.1016/j.aca.2008.10.031