Formation of a robust and stable film comprising ionic liquid and polyoxometalate on glassy carbon electrode modified with multiwalled carbon nanotubes: Toward sensitive and fast detection of hydrogen peroxide and iodate

Haghighi, Behzad; Hamidi, Hassan; Gorton, Lo

Formation of a robust and stable film comprising ionic liquid and polyoxometalate on glassy carbon electrode modified with multiwalled carbon nanotubes: Toward sensitive and fast detection of hydrogen peroxide and iodate

Files

Hassan_Hamidi_Electrochimica_Acta2010.pdf(1.26 MB)

Accepted Version

Date

2010-03-23

Authors

Haghighi, Behzad

Hamidi, Hassan

Gorton, Lo

Publisher

Elsevier B.V.

Published Version

10.1016/j.electacta.2010.03.041

Abstract

A robust and stable film comprising n-octylpyridinum hexafluorophosphate ([C8Py][PF6]) and 1:12 phosphomolybdic acid (PMo12) was prepared on glassy carbon electrodes modified with multiwall carbon nanotubes (GCE/MWCNTs) by dip-coating. The cyclic voltammograms of the GCE/MWCNTs/[C8Py][PF6]-PMo12 showed three well-defined pairs of redox peaks due to the PMo12 system. The surface coverage for the immobilized PMo12 and the average values of the electron transfer rate constant for three pairs of redox peaks were evaluated. The GCE/MWCNTs/[C8Py][PF6]-PMo12 showed great electrocatalytic activity towards the reduction of H2O2 and iodate. The kinetic parameters of the catalytic reduction of hydrogen peroxide and iodate at the electrode surface and analytical features of the sensor for amperometric determination of hydrogen peroxide and iodate were evaluated.

Keywords

Iodate , Ionic liquid , Modified electrode , Phosphomolybdic acid , H2O2

Citation

Haghighi, B., Hamidi, H. and Gorton, L. (2010) 'Formation of a robust and stable film comprising ionic liquid and polyoxometalate on glassy carbon electrode modified with multiwalled carbon nanotubes: Toward sensitive and fast detection of hydrogen peroxide and iodate', Electrochimica Acta, 55(16), pp. 4750-4757. doi: 10.1016/j.electacta.2010.03.041