Nonenzymatic electrochemical sensor based on PdAu nanoflowers for the detection of hydrogen peroxide

Abstract

In this work, PdAu nanoflowers was synthesized and used to fabricate hydrogen peroxide sensor . The sensor was fabricated by simple dropping of the mixed solution of chitosan and PdAu nanoflowers on a glassy carbon electrode. Using electrochemical impedance spectroscopy and cyclic voltammetry, we characterized the modified electrode. The proposed sensor exhibited a good performance due to the excellent electrocatalytic activity of PdAu nanoflowers toward H 2 O 2 in a wide linear range from 0.05 to 12 mM with a low detection limit of 1.5 μM (S/N=3). Moreover, the proposed sensor exhibited satisfying reproducibility and stability . The practical application of the nonenzymatic sensor was investigated via determination of H 2 O 2 in real disinfected fetal bovine serum samples.