Electrochemical derivatization of carbon surface by reduction of diazonium salts in situ generated from nitro precursors in aqueous solutions and electrocatalytic ability of the modified electrode toward hydrogen peroxide

The carbon electrode was covalently modified by electrochemical reduction of nitro precursor in the presence of NaNO 2 in aqueous solutions. The nitro precursor used is p-nitrophenyl phosphate, a well-known chromogenic substrate for the determination of acid and alkaline phosphatases. It is the firs...

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Bibliographic Details
Published in:Electrochemistry communications 2010-12, Vol.12 (12), p.1746-1748
Main Authors: Han, Shuang, Yuan, Yali, Hu, Lianzhe, Xu, Guobao
Format: Article
Language:English
Subjects:
Chemistry
Diazonium salt
Electrochemical reduction
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Hydrogen peroxide
Nitro precursors
Other electrodes
p-Nitrophenyl phosphate
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Summary:The carbon electrode was covalently modified by electrochemical reduction of nitro precursor in the presence of NaNO 2 in aqueous solutions. The nitro precursor used is p-nitrophenyl phosphate, a well-known chromogenic substrate for the determination of acid and alkaline phosphatases. It is the first method for the covalent modification of carbon surface with a phosphate group. The modified electrode was characterized via cyclic voltammetry, electrochemical impedance spectroscopy, and X-ray photoelectron spectroscopy. It displays good electrocatalytic activity toward hydrogen peroxide reduction.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2010.10.012