Table of Contents Author Guidelines Submit a Manuscript
International Journal of Electrochemistry
Volume 2012, Article ID 238419, 7 pages
http://dx.doi.org/10.1155/2012/238419
Research Article

Prussian Blue Modified Solid Carbon Nanorod Whisker Paste Composite Electrodes: Evaluation towards the Electroanalytical Sensing of

1Institute of Chemistry, University of Tartu, Ravila Street 14A, Tartu 50411, Estonia
2Institute of Physics, University of Tartu, Riia Road 142, Tartu 51014, Estonia
3Division of Chemistry and Environmental Science, School of Science and the Environment, Faculty of Science and Engineering, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, Lancs, UK

Received 18 October 2011; Accepted 20 December 2011

Academic Editor: Boniface Kokoh

Copyright © 2012 Carolin Siimenson et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Metallic impurity free solid carbon nanorod “Whiskers” (SCNR Whiskers), a derivative of carbon nanotubes, are explored in the fabrication of a Prussian Blue composite electrode and critically evaluated towards the mediated electroanalytical sensing of H2O2. The sensitivity and detection limits for H2O2 on the paste electrodes containing 20% (w/w) Prussian Blue, mineral oil, and carbon nanorod whiskers were explored and found to be 120 mA/(M cm2) and 4.1 μM, respectively, over the concentration range 0.01 to 0.10 mM. Charge transfer constant for the 20% Prussian Blue containing SCNR Whiskers paste electrode was calculated, for the reduction of Prussian Blue to Prussian White, to reveal a value of  1/s (, ). Surprisingly, our studies indicate that these metallic impurity-free SCNR Whiskers, in this configuration, behave electrochemically similar to that of an electrode constructed from graphite.