Abstract
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.
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