Electrochemically Prepared Three‐dimensional Porous Nitrogen‐doped Graphene Modified Electrode for Non‐enzymatic Detection of Hydrogen Peroxide. Issue 9 (8th June 2017)

• Record Type: Journal Article
• Authors: Qi, Yamin; Bai, Jie; Ding, Xiaoteng; Zhang, Hui‐Min
• Is Part Of: Electroanalysis. Volume 29:Issue 9(2017)
• Page Start: 2083
• Page End: 2089
• Publication Date: 2017-06-08
• Subjects: Nitrogen-doped graphene -- Electrochemical detection -- Non-enzymatic -- Hydrogen peroxide; Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201700142
• Languages: English
• ISSNs: 1040-0397

Abstract

Abstract: A facile and green electrochemical method for the fabrication of three‐dimensional porous nitrogen‐doped graphene (3DNG) modified electrode was reported. This method embraces two consecutive steps: First, 3D graphene/polypyrrole (ERGO/PPy) composite was prepared by electrochemical co‐deposition of graphene and polypyrrole on a gold foil. Subsequently, the ERGO/PPy composite modified gold electrode was annealed at high temperature. Thus 3DNG modified electrode was obtained. Scanning electron microscopy (SEM), X‐ray photoelectron spectroscopy (XPS) and Raman spectroscopy were used to characterize the structure and morphology of the electrode. The electrode exhibits excellent electroanalytical performance for the reduction of hydrogen peroxide (H2 O2 ). By linear sweep voltammetric measurement, the cathodic peak current was linearly proportional to H2 O2 concentration in the range from 0.6 μM to 2.1 mM with a sensitivity of 1.0 μA μM −1 cm −2 . The detection limit was ascertained to be 0.3 μM. The anti‐interference ability, reproducibility and stability of the electrode were carried out and the electrode was applied to the detection of H2 O2 in serum sample with recoveries from 98.4 % to 103.2 %. Abstract :