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Effect of the Incorporation of Proteins on the Performance of Carbon Paste Electrodes Modified with Electrogenerated Magnetite Nanoparticles towards the Reduction of Hydrogen Peroxide
Author(s) -
Comba Fausto N.,
Gutierrez Fabiana,
Herrasti Pilar,
Rubianes María D.,
Rivas Gustavo A.
Publication year - 2012
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.201200176
Subject(s) - hydrogen peroxide , magnetite , electrode , nanoparticle , electrochemistry , materials science , scanning electron microscope , carbon paste electrode , carbon fibers , magnetite nanoparticles , chemical engineering , dispersion (optics) , nuclear chemistry , chemistry , composite number , inorganic chemistry , nanotechnology , magnetic nanoparticles , cyclic voltammetry , organic chemistry , composite material , metallurgy , physics , optics , engineering
This work reports the effect of the incorporation of different proteins within carbon paste electrodes (CPE) modified with electrochemically synthesized magnetite nanoparticles (20 nm) on the electrochemical response towards hydrogen peroxide. Scanning electron microscopy images reveal that the proteins produce a more efficient dispersion of the nanoparticles within the composite. When CPE is modified with 5.0 % w/w magnetite and 5.0 % w/w albumin the sensitivity for hydrogen peroxide at −0.100 V is enhanced 40 times and the charge transfer resistance significantly decreases. The increase in sensitivity and the decrease in R ct was dependent on the nature of the protein.