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Browse Journals & Magazines > Micro & Nano Letters, IET ...> Volume:7 Issue:6 Help

Octahedral and tetrahedral cobalt species in nanodimensional pores of mordenite zeolite as modified carbon paste electrode for determination of ascorbic acid

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1 Author(s)
Pourahmad, A. ; Dept. of Chem., Islamic Azad Univ., Rasht, Iran

A new method is developed for the catalytic oxidation of ascorbic acid (AA) at zeolite-modified carbon paste electrode, doped with cobalt (II) (Co2+ MOR/ZME). Characterisation of Co2+-loaded mordenite zeolite has been carried out by diffuse reflectance spectroscopy (DRS), Fourier transform-infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). FTIR and DRS show octahedral and tetrahedral Co2+ species into mordenite channels. TEM pictures reveal the formation of cobalt phyllosilicate. Cobalt (II) exchanged in zeolite-type mordenite acts as a catalyst to oxidise AA. The modified electrode lowered the overpotential of the reaction by ~500~mV. The mechanism of electrochemical oxidation of AA using modified electrode was investigated by cyclic voltammetry (CV) study. Results of CV using this modified electrode show one well-resolved anodic wave for the oxidation of AA, which makes it possible for determination of compound.

Published in:
Micro & Nano Letters, IET  (Volume:7 ,  Issue: 6 )

Date of Publication: June 2012

Page(s):
511 - 514
ISSN :
1750-0443
INSPEC Accession Number:
12818045
Digital Object Identifier :
10.1049/mnl.2012.0187
Product Type:
Journals & Magazines
Date of Current Version :
12 July 2012
Issue Date :
June 2012
Sponsored by :
Institution of Engineering and Technology

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