Synthesis, Characterization and Performance of a New Copper Complex as Electrocatalyst of Hydrogen Peroxide and Nitrite
The present work reports on the synthesis, characterization and performance of a new copper(II) complex of [Cu4(C11H14N2)4Cl6O] as electrocatalyst for hydrogen peroxide and nitrite reduction. The structure of the complex was characterized by X-ray crystallography, IR spectroscopy and elemental analysis. The molecular structure contained four 1-butyl-1H-benzo[d]imidazole ligands and a core in which the copper atoms occupied the bridgehead positions, six chlorine atoms occupied the bridging sites, and one oxygen atom occupied the center position. The electrochemical behavior and electrocatalysis of the title complex bulk-modified carbon paste electrode (Cu-CPE) have been studied by cyclic voltammetry. The Cu-CPE shows good electrocatalytic activities toward the reduction of hydrogen peroxide and nitrite. The detection limit, linear calibration range and the sensitivity are 0.02 M, 0.03 to 0.25 M, 76.62 A M–1 for hydrogen peroxide detection, and 0.03 M, 0.05 to 0.25 M, 72.45 A M–1 for nitrite detection. This modified electrode has good reproducibility, high stability, low detection limit, technical simplicity and possibility of rapid preparation, which is important for practical application.
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Document Type: Research Article
Publication date: June 1, 2010
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