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Methylene Blue/Multiwall Carbon Nanotube Modified Electrode for the Amperometric Determination of Hydrogen Peroxide
Author(s) -
Peña Roselyn C.,
Bertotti Mauro,
Brett Christopher M. A.
Publication year - 2011
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201100324
Subject(s) - amperometry , cyclic voltammetry , hydrogen peroxide , dielectric spectroscopy , carbon nanotube , methylene blue , electrochemistry , electrode , materials science , inorganic chemistry , chemistry , nuclear chemistry , chemical engineering , nanotechnology , organic chemistry , catalysis , engineering , photocatalysis
A novel amperometric sensor based on the incorporation of multiwalled carbon nanotubes (MWCNT) into a poly(methylene blue) (PMB) film immobilized on carbon composite electrodes is described. Cyclic voltammetry indicated that at a surface covered by a MWCNT/PMB layer the cathodic reduction of hydrogen peroxide is facilitated and occurs already at 0.0 V versus SCE. The effect of the order of deposition of PMB and MWCNT, as well as its loading, on electrochemical behaviour was evaluated by cyclic voltammetry and electrochemical impedance spectroscopy. The influence of the various immobilised platforms on the electrocatalytic performance towards hydrogen peroxide was also examined.