A survey on the effect of ionic liquid on electrochemical behavior and electrocatalytic activity of a phosphomolybdic acid-ionic liquid-MWCNT–modified glassy carbon electrode

  • Samaneh Feizy
  • Behzad HaghighiEmail author
Original Paper


The surface of a glassy carbon electrode modified with multi-walled carbon nanotubes (GCE/MWCNTs) was coated with a layer of phosphomolybdic acid (PMo12) and ionic liquid (n-dodecyl pyridinium hexafluorophosphate, [C12Py][PF6]). Cyclic voltammetry was performed to investigate the effect of [C12Py][PF6] on the electrochemical behavior of the prepared modified electrode, GCE/MWCNTs/[C12Py][PF6]-PMo12. The surface coverage and the rate constant of electron transfer for three redox pairs of the immobilized PMo12 were evaluated and compared with those obtained for GCE/MWCNTs/n-octyl pyridinium hexafluorophosphate ([C8Py][PF6])-PMo12 fabricated using [C8Py][PF6] in our previous study to find a correlation between the structure of ionic liquid and its effect. Thereafter, the electrocatalytic activity of GCE/MWCNTs/[C12Py][PF6]-PMo12 towards the reduction of nitrite, H2O2, iodate, bromate, chlorate, and periodate was investigated and the rate constant for the chemical reaction of each analyte with PMo12 at the electrode surface was calculated. The prepared electrode was then applied for the amperometric measurements of the mentioned analytes with the satisfactory electroanalytical characteristics.


Phosphomolybdic acid n-Dodecyl pyridinium hexafluorophosphate Modified electrode Electrocatalytic reduction Nitrite H2O2 Iodate Bromate Chlorate Periodate 



The authors would like to thank the Institute for Advanced Studies in Basic Science (IASBS) (grant number G2017IASBS119) for the financial support.

Funding information

The study received financial support from the Institute for Advanced Studies in Basic Science (grant number G2017IASBS119).


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© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of ChemistryInstitute for Advanced Studies in Basic SciencesZanjanIran
  2. 2.Department of Chemistry, College of SciencesShiraz UniversityShirazIran

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